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Johnson Controls LSWU025, Manual

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Johnson Controls LSWU025 Manual Download Page 139

JOHNSON CONTROLS

139

SECTION 5 – SEQUENCE OF OPERATION

FORM 145.05-NOM7 

ISSUE DATE: 10/31/2019

5

•  Six Foot Cooling Zone: When designing a Flex-

Sys system, only the first 6 feet from the floor up 

is to be conditioned. Above 6 feet, the air needs 

to be mixed with heat loads. This ensures that the 

RAT is at least 78.0°F. It has been determined that 

RATs cooler than 78.0°F cannot properly raise 

the temperature of the air leaving the evaporator 

coil to the recommended MX SAT of 62–64.0°F. 

It has been determined than MX SATs lower than 

62.0°F are uncomfortable to occupants of a space. 

•  Multiple Plenums/One Unit: When designing a 

system that serves multiple plenums, it is highly 

recommended that each plenum have its own vol-

ume damper controlled by an actuator. Each ple-

num should also have its own pressure transducer 

that controls the actuator driven volume damper. 

Each plenum should be maintained at 0.05 ”W.C. 

The above issues should have been taken into consid-

eration during the design and engineering phase of the 

project. 
Since a FlexSys unit delivers air through an underfloor 

plenum, some of the setpoints differ from a typical 

VAV unit. Below are recommended setpoints provided 

by the Johnson Controls engineering team. There has 

been a lot of testing and research completed on these 

systems to arrive at these setpoints. Please be advised 

that these are recommendations only, and job specif-

ic setpoints could be different. We recommend using 

these setpoints at least as a starting point. 

Factory Recommended Setpoints 

•  RAT Cooling SP: 78.0°F 
• 

MX SAT SP: 62–64.0°F (see note below) 

•  Evap Leaving Air Temp High SP: 58.0°F 
•  Evap Leaving Air Temp Low SP: 55.0°F 
•  Duct Static SP: 0.05 ”W.C. 
•  Heating SAT SP: 80.0°F 

On a FlexSys unit, the MX SAT is the tem-

perature of the supply air off the evapora-

tor coil mixed with the warmer return air 

that is bypassed around the evaporator 

coil. The bypassed return air is introduced 

directly under the supply air fan. 

FlexSys: Current Operating Mode 

(Occupied) 

The “CURRENT OPER MODE” for a FlexSys config-

ured unit is decided the same as for a VAV configured 

unit: by the Return Air Temperature. 

• 

If the RAT is ≥ the COOLING RAT SP by 0.5°F, 

the unit enters the COOLING mode 

• 

If the RAT is ≤ the HEATING RAT SP by 0.5°F, 

the unit enters the HEATING mode 

•  If the RAT is between the COOLING RAT SP and 

the HEATING RAT SP, the unit remains in the 

STANDBY mode 

FlexSys: Fan Operation 

The same as a VAV configured unit, the supply fan is 

controlled by a VFD. The VFD controls the speed of 

the supply fan up/down to achieve and maintain the 

ACTIVE DUCT STATIC SP. 
The same as a VAV configured unit, the supply fan is 

on whenever the unit is in the OCCUPIED mode and 

cycles on/off in the UNOCCUPIED mode with a de-

mand for heating or cooling. 

FlexSys: Cooling 

Occupied

Whenever a FlexSys unit enters an OCC COOLING 

mode, it always starts in the OCC COOLING W/O 

BYPASS mode for the first 30 seconds. After this time 

delay has expired, the unit controller determines which 

mode it needs to be in: OCC COOLING W/O BYPASS 

or OCC COOLING W/ BYPASS. 

Occ Cooling w/o Bypass:

The unit controller cycles the compressors or modulate 

the O/A damper to achieve and maintain the MX SAT 

SP. 

•  If the economizer is active, the unit remains in the 

OCC COOLING W/O BYPASS mode 
OR 

• 

If the RAT ≥ RAT SP plus 0.5°F but RAT < MX 

SAT SP + the RA Diff SP (user adjustable between 

2–10.0°F) 

Summary of Contents for LSWU025

Page 1: ... LSWU LSWD LSWF WITH IPU2 CONTROL 25 105 TON WATER COOLED SELF CONTAINED UNITS INSTALLATION OPERATION AND MAINTENANCE Supersedes 145 05 NOM7 818 Form 145 05 NOM7 1019 035 22910 007 Issue Date October 31 2019 ...

Page 2: ...d any referenced materials This in dividual shall also be familiar with and comply with all applicable industry and governmental standards and regulations pertaining to the task in question SAFETY SYMBOLS The following symbols are used in this document to alert the reader to specific situations Indicates a possible hazardous situation which will result in death or serious injury if proper care is ...

Page 3: ...bject to change without notice Johnson Controls makes no commitment to update or provide current information automatically to the manual or product owner Updated manuals if applicable can be obtained by contacting the nearest Johnson Controls Service office or accessing the John son Controls QuickLIT website at http cgproducts johnsoncontrols com It is the responsibility of rigging lifting and ope...

Page 4: ...5 Ton SUPPLY MOTOR HP 05 5 HP 07 7 5 HP 10 10 HP 15 15 HP 20 20 HP 25 25 HP 30 30 HP 40 40 HP 50 50 HP 60 60 HP SUPPLY MOTOR TYPE OH ODP High Eff OP ODP Premium Eff TH TEFC High Eff TP TEFC Premium Eff FAN SIZE 25 25 inch 28 28 inch 32 32 inch 36 36 inch 40 40 inch FAN CLASS P2 CL2 Plenum P3 CL3 Plenum VFD OPTION CV Constant Volume VV Variable Air Volume VB VAV with Bypass VR VFD Ready HEAT OPTION...

Page 5: ...move Shipping Restraints 39 Physical Data 40 Dimensions 45 Electrical Data 74 Field Wiring 75 BACnet Communication 75 Pump Start Output 76 Alarm Contacts 76 Isolation Damper Control 76 CTB1 Field Control Wiring Inputs 76 Phase Monitor 78 Ducting 78 Water Piping 78 Static Pressure Transducer Installation VAV Units Only 81 Static Pressure Transducer Installation FlexSys Units Only 82 Duct High Press...

Page 6: ...ion 99 Variable Air Volume VAV Mode Operation 103 Compressor Control and Sequencing 111 Compressor Operation 114 Water Cooled Condenser Operations 119 Waterside or Air Economizer Operation 123 Heat Operations 134 Ventilation System 137 Dirty Filter Switch 138 FlexSys Operation 138 SECTION 6 USER INTERFACE CONTROL CENTER 143 User Interface Control Center 143 Setpoints 153 Program 155 Options 157 Da...

Page 7: ...dations Fan and Coil Section Combined LSW_070 105 35 FIGURE 25 Shipping Restraint Locations 39 FIGURE 26 Unit Dimensions Top Discharge Assembled LSWU 025 040 45 FIGURE 27 Unit Dimensions Top Discharge Assembled LSWU 050 060 46 FIGURE 28 Unit Dimensions Top Discharge Assembled LSWU 070 105 47 FIGURE 29 Unit Dimensions front Discharge Assembled LSWF 050 060 48 FIGURE 30 Unit Dimensions Top Discharge...

Page 8: ...ply Fan Speed 110 FIGURE 68 Active SAT Setpoint vs Return Air Temp 111 FIGURE 69 System A Compressor at 1 3 Capacity 112 FIGURE 70 System A Compressor at 2 3 Capacity 112 FIGURE 71 System A Compressor at full Capacity 112 FIGURE 72 Condenser Only Piping Diagram with No Valves from the Factory 119 FIGURE 73 Condenser and Piping Diagram w Condenser Only Valve from the Factory 120 FIGURE 74 Cond Wate...

Page 9: ... 20 Piezometer Airflow Measurements 106 TABLE 21 System A Compressor Capacity 25 60 Ton 111 TABLE 22 Compressor Status Priority Level 115 TABLE 23 Compressor Safeties 116 TABLE 24 CFM 134 TABLE 25 Heat Stages 134 TABLE 26 Supply Air Density from Temperature and Altitude 142 TABLE 27 Status 145 TABLE 28 Unit Data 146 TABLE 29 Cooling 147 TABLE 30 Compressor Systems A F 148 TABLE 31 Supply System 14...

Page 10: ...s and is now the system of choice Table 1 ACRONYM CHART ACRONYM TEXT AO Analog Output AFS Air Flow Switch DHS Duct High Static Switch DSP Duct High Pressure Sensor DO Digital Output IN Universal Input LCD Logic Controller Display MSF Supply Fan Relay OLSF Supply Fan Overload PM Phase Monitor PWS Power Supply RSF Supply Fan Relay S Toggle Switch T Transformer VFD Variable Frequency Drive SAT Supply...

Page 11: ...80T 11300 11300 11300 95T 12100 12100 12100 105T 12100 12100 12100 In order for the supply fan air proving switch to close the unit must achieve the minimum CFM levels listed in the chart If the supply fan air proving switch does not close the unit registers a warning or possibly fault and shutdown APPROVALS Design certified by ETL for indoor installation only LIMITATIONS The installation of this ...

Page 12: ...025 040 075 83768 903 REV NO FILTER OPTIONS A 1 4 inch filter 76 43 2 4 inch prefilter 4 inch high efficiency filter 80 68 24 inch clearance required on standard units 3 inch clearance required on units with low clearance option 24 inch clearance required on standard units 3 inch clearance required on units with low clearance option Removable inner panel is provided for access to water valves when...

Page 13: ...ents Figure 3 RECOMMENDED SERVICE AND MAINTENANCE CLEARANCE TOP DISCHARGE LSW_050 060 075 83768 903 REV NO FILTER OPTIONS A 1 4 inch filter 82 00 2 4 inch prefilter 4 inch high efficiency filter 86 25 24 inch clearance required on standard units 3 inch clearance required on units with low clearance option 24 inch clearance required on standard units 3 inch clearance required on units with low clea...

Page 14: ...arance required on units with low clearance option Removable inner panel is provided for access to water valves when no left side clearance is required Removable door with hinges One door handle and tool operated latch Entry door standard 72 inch x 18 inch nominal with one door handle and tool oper ated latch Electrical panel door Non removable with hinges One door handle and tool operated latch O...

Page 15: ...its 3 inch clearance required on units with low clearance option Removable door with hinges One door handle and tool operated latch Entry door under standard 32 wide x 44 inch high nominal with one door handle and tool operated latch Electrical panel door Non removable with hinges One door handle and tool operated latch Optional when clear ance is available Removable doors with hinges One door han...

Page 16: ...8 inch wide x 84 inch high nomi nal with one door handle and tool operated latch Electrical panel door Non remov able with hinges One door handle and tool operated latch Optional when clear ance is available Removable doors with hinges One door handle and one tool operated latch Removable internal panel is provided for access to water valves when no leftside clear ance is required 99 94 inch 42 in...

Page 17: ...32 inch wide x 44 inch high nominal with one door handle and tool operated latch Electrical panel door Non removable with hinges One door handle and tool operated latch Optional when clearance is available Removable doors with hinges One door handle and one tool operated latch Removable internal panel is provided for access to water valves when no leftside clear ance is required 78 37 inch 42 inch...

Page 18: ...e option Removable inner panel is pro vided for access to water valves when no left side clearance is required Removable door with hinges One door handle and tool operated latch Entry door standard 72 inch x 18 inch nominal with one door handle and tool oper ated latch Electrical panel door Non removable with hinges One door handle and tool operated latch Optional when clearance is available Remov...

Page 19: ...earance option Removable inner panel is pro vided for access to water valves when no left side clearance is required Removable door with hinges One door handle and tool operated latch Entry door standard 72 inch x 18 inch nominal with one door handle and tool operated latch Electrical panel door Non removable with hinges One door handle and tool operated latch Optional when clearance is available ...

Page 20: ...standard units 3 inch clear ance required on units with low clearance option Removable door with hinges One door handle and tool operated latch Entry door standard 18 inch wide x 84 inch high nominal with one door handle and tool operated latch Electrical panel door Non removable with hinges One door handle and tool operated latch Optional when clear ance is available Removable doors with hinges O...

Page 21: ...ion Removable inner panel is provided for access to wa ter valves when no left side clearance is required Removable door with hinges One door handle and tool operated latch Removable door with hinges One door handle and tool operated latch Entry door standard 72 inch x 18 inch nominal with one door handle and tool operated latch Electrical panel door Non removable with hinges One door handle and t...

Page 22: ...the factory for further information Never allow any part of the unit to fall during unloading or moving as this may result in serious damage Ensure lifting equipment capacity ex ceeds unit weight by an adequate safety factor to prevent injury death or unit damage 4 Ensure the rigging equipment and material have the required capacity for the job and that all items are in good condition 5 These inst...

Page 23: ...Isolation pads supplied with unit are adequate for most installations when placed and used per unit size diagram Figure 12 VIBRATION ISOLATION PAD LOCATIONS LSW_025 040 0 6 00 70 50 0 21 75 68 00 0 35 00 78 00 70 13 FILTER SECTION COIL SECTION FAN SECTION RIGHT LEFT REAR FRONT 075 83768 910 REV NOTES 1 All dimensions are in inches Do not attempt to install dollies in the cen ter of the unit Units ...

Page 24: ...shipped with fourteen 2 x 6 x 1 inch thick vibration isolation pads as shown in Figure 12 Proper placement of isolation devices under the curb of the LSWU is critical to the operation and noise reduction of the unit Isolation pads supplied with unit are adequate for most installations when placed and used per unit size diagram Do not attempt to install dollies in the cen ter of the unit Units can ...

Page 25: ...e adequate for most installations when placed and used per unit size diagram Do not attempt to install dollies in the cen ter of the unit Units can become unstable and tip over causing injury Do not use hooks to lift unit or hook into open channels to lift unit This could cause unit damage Figure 14 VIBRATION ISOLATION PAD LOCATIONS LSW_070 105 15 00 0 67 00 119 00 17 50 56 75 FRONT LEFT RIGHT FAN...

Page 26: ...nel Ensure that the rigging equipment and materials have the required capacity for the job and that all items are in good condition are currently quali fied for example inspection is up to date and are properly used Distribute load between lifting lugs equally Ensure that lifting straps cables or chains used clear the sides and corner edges of the unit If not damage may occur Before lifting unit r...

Page 27: ... 145 05 NOM7 ISSUE DATE 10 31 2019 79 50 REF 35 00 REF 78 37 REF TOP VIEW LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINTS LIFTING POINTS SHIPPING TIMBERS LD21637 Figure 16 LIFTING RECOMMENDATIONS COIL SECTION ONLY LSW_025 040 ...

Page 28: ... 10 31 2019 SECTION 2 INSTALLATION 90 00 REF 35 00 REF 100 00 REF TOP VIEW LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT SHIPPING TIMBERS LIFTING POINTS LIFTING POINTS LD21638 Figure 17 LIFTING RECOMMENDATIONS COIL SECTION ONLY LSW_050 060 ...

Page 29: ...M7 ISSUE DATE 10 31 2019 102 00 REF 130 00 REF 52 00 REF FRAME AND OVERALL LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT TOP VIEW LIFTING POINTS LIFTING POINTS SHIPPING TIMBERS LD21639 Figure 18 LIFTING RECOMMENDATIONS COIL SECTION ONLY LSW_070 105 ...

Page 30: ...E 10 31 2019 SECTION 2 INSTALLATION 79 50 REF 35 37 REF 78 37 REF TOP VIEW LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT SHIPPING TIMBERS LIFTING POINTS LIFTING POINTS LD21640 Figure 19 LIFTING RECOMMENDATIONS FAN SECTION ONLY LSW_025 040 ...

Page 31: ... NOM7 ISSUE DATE 10 31 2019 90 00 REF 41 00 REF 100 00 REF TOP VIEW LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT SHIPPING TIMBERS LIFTING POINTS LIFTING POINTS 075 83756 950 SHT2 REV Figure 20 LIFTING RECOMMENDATIONS FAN SECTION ONLY LSW_050 060 ...

Page 32: ...ON 2 INSTALLATION 102 00 REF 130 00 REF LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT TOP VIEW 24 46 REF 44 00 REF FRAME 52 74 REF OVERALL LIFTING POINTS LIFTING POINTS SHIPPING TIMBERS LD21642 Figure 21 LIFTING RECOMMENDATIONS FAN SECTION ONLY LSW_070 105 ...

Page 33: ...5 NOM7 ISSUE DATE 10 31 2019 79 50 REF LIFTING POINTS LIFTING POINTS 70 37 REF 78 37 REF TOP VIEW LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT SHIPPING TIMBERS LD21643 Figure 22 LIFTING RECOMMENDATIONS FAN AND COIL SECTION COMBINED LSW_025 040 ...

Page 34: ... 2019 SECTION 2 INSTALLATION 90 00 REF 76 00 REF 100 00 REF TOP VIEW LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINTS LIFTING POINTS SHIPPING TIMBERS LD21644 Figure 23 LIFTING RECOMMENDATIONS FAN AND COIL SECTION COMBINED LSW_050 060 ...

Page 35: ... NOM7 ISSUE DATE 10 31 2019 102 00 REF 96 00 REF 130 00 REF LIFTING POINT LIFTING POINT LIFTING POINT LIFTING POINT TOP VIEW LIFTING POINTS LIFTING POINTS SHIPPING TIMBERS LD21645 Figure 24 LIFTING RECOMMENDATIONS FAN AND COIL SECTION COMBINED LSW_070 105 ...

Page 36: ...h 30 35 Eff Prefilter MERV 11 8 288 288 288 288 391 391 4 inch 90 95 Eff 4 inch30 35 Eff Prefilter MERV 14 8 288 288 288 288 391 391 Plenums Inlet Plenum Sound Attenuating 246 246 246 246 290 290 Air Economizer 678 678 678 678 866 866 Outlet Plenum Half 295 295 295 295 355 355 Outlet Plenum Full 386 386 386 386 415 415 Table 6 SUPPLY FAN MOTOR WEIGHTS HP ODP TEFC HI EFF PREMIUM EFF HI EFF PREMIUM ...

Page 37: ...enum on the unit Use a forklift slings or other suitable lifting means to position the plenum on top of the unit Prior to placing the plenum on the top of the unit attach the foam rubber gasket material to the bottom of the plenum Carefully set the plenum and attach with the provided mounting hardware If openings are field cut in the plenum take precaution to prevent fiberglass from the cut openin...

Page 38: ...ble Frequency Drive 15 HP 96 96 96 96 20 HP 96 96 96 96 25 HP 115 115 115 115 30 HP 115 115 115 115 40 HP 115 115 115 115 50 HP 144 144 144 Filter Section 4 Inch Filter Rack with 30 MERV 8 Filters 257 257 257 257 4 Inch Filter Rack with 60 MERV 11 Filters 306 306 306 306 4 Inch Filter Rack with 90 MERV 15 Filters 306 306 306 306 Plenums Inlet Plenum Sound Attenuating 335 335 335 335 Outlet Plenum ...

Page 39: ...ining bolts must be removed after unit has been set in its final location Do not remove seismic guide pins if unit came with this option Refer to factory order form or option tag The shipping restraints are accessible from underneath the blower compartment The blower and motor as semblies mount on two rails that run from the left to right side of the unit The two rails are tied down to the blower ...

Page 40: ... 2 26 7 26 7 40 1 40 1 Rows 4 4 4 6 5 6 Fins Per Inch Standard High Efficiency 12 17 12 17 12 17 12 17 12 17 12 17 Supply Fan Fan Type Airfoil Plenum Fan SWSI Diameter Standard inches class 28 Class II 28 Class II 28 Class II 28 Class II 32 Class II 36 Class II Diameter High Capacity Fan inches class 28 Class II 28 Class II None None 36 Class II 36 Class II Fan Motor HP 5 20 10 25 10 25 10 25 15 4...

Page 41: ... Air Flow Range Maximum Design Air Flow Standard CFM 29 800 33 900 36 100 36 100 Maximum Design Air Flow High Efficiency CFM 24 800 28 200 30 100 30 100 Minimum Design Air Flow Standard CFM 19 900 22 600 24 200 24 200 Minimum Design Air Flow High Ef ficiency CFM 17 400 19 800 21 200 21 200 Cabinet Dimensions Depth Excluding Filter Section inches 96 96 96 96 Length inches 130 130 130 130 Height inc...

Page 42: ...D E F 22 5 22 5 22 5 22 5 23 25 23 5 25 3 25 3 19 0 19 0 23 5 23 5 23 5 23 5 19 0 19 0 23 5 23 5 27 5 27 5 Waterside Economizer Coil 1 2 inch OD Face Area sq feet 49 7 56 5 60 3 60 3 Rows Fins Per Inch 4 11 4 11 4 11 4 11 Heating Hot Water Coil Face Area sq feet 35 8 40 6 43 3 43 3 Hot Water Coil Rows Fins Per Inch 1 12 1 12 1 12 1 12 Steam Coil Consult factory Electric Heat KW 240 3 60 Nominal 17...

Page 43: ... 33 5 4 0 11 98 24 000 8 100 6 060 52 5 35 0 51 5 33 5 4 0 11 98 24 000 8 100 ITEM UNIT MODEL COIL FACE AREA FACE VELOCITY FPM WATT DEN SITY WATTS SQ IN MAXI MUM TEMPERATURE RISE DEG F MAXIMUM MINIMUM MAXIMUM MINIMUM 1 025 17 78 1 254 439 14 00 14 44 4 13 2 032 22 22 1 606 564 28 00 22 46 6 46 3 035 26 67 2 007 677 28 00 18 72 5 17 4 040 26 67 2 007 677 28 00 18 72 5 17 5 050 40 10 2 003 676 27 95...

Page 44: ...JOHNSON CONTROLS 44 FORM 145 05 NOM7 ISSUE DATE 10 31 2019 SECTION 2 INSTALLATION THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 45: ...10 spigot female adapter Optical Unit VFD Display 63 62 79 50 15 76 DRAIN CONNECTION DETAIL B Drain piping connection see Detail B 59 68 17 26 66 09 5 89 4 43 SUPPLY AIR AIR IN DETAIL A 20 88 88 14 63 15 88 6 68 1 38 1 38 Electrical Penetrations see Detail A Disconnect Switch Toggle Keypad Display 4 12 0 26 4 23 9 89 Discharge Opening 2 63 inch OD Copper Grooved Connections 1 63 inch Copper Male S...

Page 46: ...ting Lug Condenser Water Out Hot Water Out Hot Water In Condenser Water In Std Dia 1 00 Nom PVC socket to connect metal pipe plastic weld one universal P N 478 010 spigot female adapter Optical Unit VFD Display 75 62 90 00 14 26 DRAIN CONNECTION DETAIL B DUCT CONNECTION OPTION Showing Duct Inside Dimensions Drain piping connection see Detail B 71 25 16 19 85 72 7 86 3 69 SUPPLY AIR AIR IN DETAIL A...

Page 47: ...PVC SOCKET TO CONNECT METAL PIPE PLASTIC WELD ONE UNIVERSAL PN 478 012 SPIGOT FEMALE ADAPTER DRAIN CONNECTION DETAIL B 2 95 5 25 3 31 7 72 7 04 6 25 1 63 LIFITING LUG 3 78 11 24 42 30 130 00 120 45 A 96 00 60 74 56 10 43 60 53 41 39 80 34 80 88 2 50 1 38 57 44 57 44 36 22 19 19 102 00 84 10 18 11 109 22 80 43 19 13 12 14 CONDENSER WATER IN CONDENSER WATER OUT DISCONNECT SWITCH TOGGLE DRAIN PIPING ...

Page 48: ...2X 50 44 46 30 99 98 1 63 LIFTING LUG OPTIONAL COIL SECTION DOORS CONDENSER WATER IN CONDENSER WATER OUT HOT WATER OUT HOT WATER IN COMPRESSOR COIL ACCESS DOOR ELECTRICAL PENETRATIONS SEE DETAIL A ELECTRICAL COMPARTMENT DOOR FAN ACCESS DOOR OPTIONAL VFD 4 45 10 12 DRAIN CONNECTION DETAIL B STD DIA 1 00 NOM PVC SOCKET TO CONNECT METAL PIPE PLASTIC WELD ONE UNIVERSAL PN 478 010 SPIGOT FEMALE ADAPTER...

Page 49: ...plings REAR LEFT FRONT VIEW FRONT VIEW FAN SECTION COIL SECTION RIGHT Std dia 1 00 nom PVC socket to connect metal pipe plastic weld one universal P N 478 010 spigot female adapter 35 00 35 25 78 37 ELECTRICAL PENETRATIONS 79 50 RIGHT DRAIN CONNECTION 34 075 83768 902 REV NOTES 1 Due to the dedication of continuous product improvement and enhancements the information dimensions provided are subjec...

Page 50: ...r Section is not shown and ships separately 3 All dimensions are in inches 075 83756 902 REV 3 69 4 45 35 2 86 5 92 TO COIL SECTION ELECTRICAL PENETRATIONS TO FAN SECTION Connection tube stubs is detached shipped inside unit with couplings REAR LEFT FRONT VIEW FRONT VIEW DRAIN CONNECTION FAN SECTION COIL SECTION RIGHT Std dia 1 00 nom PVC socket to connect metal pipe plastic weld one universal P N...

Page 51: ...CTION COIL SECTION STD DIA 1 25 NOM PVC SOCKET TO CONNECT METAL PIPE PLASTIC WELD ONE UNIVERSAL PN 478 012 SPIGOT FEMALE ADAPTER Ø Ø Ø ELECTRICAL PENETRATIONS TO COIL SECTION Figure 32 UNIT DIMENSIONS TOP DISCHARGE SEGMENTED LSWU 070 105 NOTES 1 Filter section is not shown and will be shipped separately 2 All dimensions are in English 3 Due to the dedication of continuous product improvement and e...

Page 52: ...CONNECT METAL PIPE PLASTIC WELD ONE UNIVERSAL PN 478 010 SPIGOT FEMALE ADAPTER 4 45 10 12 DRAIN CONNECTION FAN SECTION COIL SECTION CONNECTION TUBE STUBS WILL BE DETACHED SHIPPED INSIDE UNIT WITH COUPLINGS LIFTING LUG DIMENSION Figure 33 UNIT DIMENSIONS FRONT DISCHARGE SEGMENTED LSW_050 060 NOTES 1 Filter section is not shown and will be shipped separately 2 All dimensions are in English 3 Due to ...

Page 53: ...NAL OPTIONAL COIL SECTION DOORS CONDENSER WATER IN CONDENSER WATER OUT ELECTRICAL COMPARTMENT DOOR OVER FAN ACCESS DOOR UNDER ELECTRICAL PENETRATIONS SEE DETAIL A COMPRESSOR COIL ACCESS DOOR OPTIONAL VFD HOT WATER OUT HOT WATER IN 4 23 9 89 DRAIN CONNECTION DETAIL B STD DIA 1 00 NOM PVC SOCKET TO CONNECT METAL PIPE PLASTIC WELD ONE UNIVERSAL PN 478 010 SPIGOT FEMALE ADAPTER 34 A I R I N SUPPLY AIR...

Page 54: ...L PN 478 010 SPIGOT FEMALE ADAPTER CONNECTION TUBE STUBS WILL BE DETACHED SHIPPED INSIDE UNIT WITH COUPLINGS 1 38 1 38 88 14 63 15 88 20 88 4 43 4 12 6 68 ELECTRICAL PENETRATIONS FAN SECTION COIL SECTION LIFTING LUG DIMENSION Figure 35 UNIT DIMENSIONS FRONT DISCHARGE SEGMENTED LSW_025 040 NOTES 1 Filter section is not shown and will be shipped separately 2 All dimensions are in English 3 Due to th...

Page 55: ...ARTMENT DOOR FAN ACCESS DOOR OPTIONAL VFD 4 45 10 12 DRAIN CONNECTION DETAIL B STD DIA 1 00 NOM PVC SOCKET TO CONNECT METAL PIPE PLASTIC WELD ONE UNIVERSAL PN 478 010 SPIGOT FEMALE ADAPTER 34 3 69 24 19 25 44 26 69 2X 1 38 88 2 86 5 92 DETAIL A 19 09 61 94 6 31 28 45 DISCHARGE OPENING DIMENSIONS SUPPLY AIR 61 94 1 60 SECTION C C SCALE 1 4 HEAVY GAGE EXPANDED METAL DISCHARGE OPENING 2 63 OD COPPER ...

Page 56: ... 12 DRAIN CONNECTION 99 98 1 63 LIFTING LUG 10 64 TYP 12 86 TYP TO COIL SECTION BOTTOM VIEW FAN SECTION COIL SECTION CONNECTION TUBE STUBS WILL BE DETACHED SHIPPED INSIDE UNIT WITH COUPLINGS LIFTING LUG DIMENSION Figure 37 UNIT DIMENSIONS DOWN FLOW SEGMENTED LSW_050 060 NOTES 1 Bypass plenum is shown in Figure 34 2 Filter section is not shown and will be shipped separately 3 All dimensions are in ...

Page 57: ...NSON CONTROLS 57 SECTION 2 INSTALLATION FORM 145 05 NOM7 ISSUE DATE 10 31 2019 11 93 76 06 2X 97 BYPASS PLENUM 25 00 86 1 00 Figure 38 BYPASS PLENUM FOR DOWN FLOW SEGMENTED LSW_050 060 075 83810 902 Rev A ...

Page 58: ... COMPRESSOR COIL ACCESS DOOR OPTIONAL VFD OPTIONAL COIL SECTION DOORS 4 23 9 89 DRAIN CONNECTION DETAIL B STD DIA 1 00 NOM PVC SOCKET TO CONNECT METAL PIPE PLASTIC WELD ONE UNIVERSAL PN 478 010 SPIGOT FEMALE ADAPTER 34 A I R I N 1 38 1 38 88 14 63 15 88 20 88 4 43 4 12 6 68 DETAIL A 14 12 50 25 6 31 22 88 DISCHARGE OPENING DIMENSIONS DISCHARGE OPENING SUPPLY AIR 50 25 1 60 SECTION C C SCALE 1 4 HE...

Page 59: ... WITH COUPLINGS 1 38 1 38 88 14 63 15 88 20 88 4 43 4 12 6 68 ELECTRICAL PENETRATIONS PARTIAL TOP VIEW 78 37 1 63 LIFTING LUG 8 71 TYP 8 59 TYP TO COIL SECTION BOTTOM VIEW FAN SECTION COIL SECTION LIFTING LUG DIMENSION Figure 40 UNIT DIMENSIONS DOWN FLOW SEGEMENTED LSW_025 040 NOTES 1 Bypass plenum is shown in Figure 37 2 Filter section is not shown and will be shipped separately 3 All dimensions ...

Page 60: ...NSON CONTROLS 60 FORM 145 05 NOM7 ISSUE DATE 10 31 2019 SECTION 2 INSTALLATION 11 93 60 06 2X 97 BYPASS PLENUM 25 00 86 1 00 Figure 41 BYPASS PLENUM FOR DOWN FLOW SEGEMENTED LSW_025 040 075 83822 902 Rev A ...

Page 61: ...3 89 12 14 18 11 36 22 57 44 57 44 3 78 11 24 42 30 39 80 34 80 102 00 80 96 130 00 120 45 3 20 24 52 46 98 56 10 60 74 96 00 A 24 00 2 80 5 25 7 72 7 04 6 25 1 63 LIFTING LUG 2 95 DRAIN CONNECTION DETAIL B ELECTRICAL PENETRATIONS DETAIL A 19 19 88 Ø 2 50 Ø 1 38 Ø A I R I N A I R S U P P L Y LOWER ACCESS OPENING DISCHARGE OPENING 3 125 inch OD COPPER GROOVED CONNECTIO NS Figure 42 UNIT DIMENSIONS ...

Page 62: ...25 39 80 42 30 34 80 1 38 52 00 FRONT VIEW FRONT VIEW TO COIL SECTION ELECTRICAL PENETRATIONS TO FAN SECTION REAR RIGHT LEFT DRAIN CONNECTION 3 78 COIL SECTION FAN SECTION 2 95 RIGHT LEFT Figure 43 UNIT DIMENSIONS FRONT DISCHARGE SEGMENTED LSWF 070 105 NOTE 1 Filter section is not shown and will be shipped separately 2 Due to the dedication of continuous product improvement and enhancements the in...

Page 63: ...GHT REAR 1 04 32 75 67 38 9 25 Field cut opening is stan dard Optional factory cut openings are available on front and rear sides only NOTES 1 Due to the dedication of continuous product improvement and enhancements the information dimensions provided are subject to change without notice 2 All dimensions are in inches Figure 44 HALF OUTLET PLENUM OPTION LSWU 025 040 ...

Page 64: ...NAL FULL PLENUM NOTES 1 Due to the dedication of continuous product improvement and enhancements the information dimensions provided are subject to change without notice 2 All dimensions are in inches LEFT FRONT RIGHT REAR 1 37 38 25 89 25 31 23 14 25 Field cut opening is stan dard Optional factory cut openings are available on front and rear sides only ...

Page 65: ...cation of continuous product improvement and enhancements the information dimensions provided are subject to change without notice 2 Optional hot water piping is inside full plenum 3 All dimensions are in inches REAR 54 75 14 25 67 38 FRONT 31 22 LEFT 1 04 RIGHT OPTIONAL FULL PLENUM Field cut opening is standard Optional factory cut openings are available on all four sides ...

Page 66: ... of continuous product improvement and enhancements the information dimensions provided are subject to change without notice 2 Optional hot water piping is inside full plenum 3 All dimensions are in inches OPTIONAL FULL PLENUM LEFT FRONT RIGHT REAR 1 37 72 88 65 25 31 23 9 25 Field cut opening is stan dard Optional factory cut openings are available on front and rear sides only ...

Page 67: ...ALF PLENUM Positioned over Fan Coil sections OPTIONAL HALF PLENUM Positioned only over Fan section 9 15 1 02 9 15 1 02 9 15 1 02 FRONT FRONT RIGHT RIGHT LEFT LEFT REAR REAR 31 23 RIGHT FRONT FACTORY CUT DUCT OPENINGS Height Options Inches Length Options Inches 12 36 14 42 16 48 18 54 20 60 22 66 24 inch 72 inch Figure 48 UNIT DIMENSIONS DISCHARGE PLENUM LSWU 070 105 NOTE 1 Due to the dedication of...

Page 68: ...r 4 inch High Efficiency Filter 106 31 NOTES 1 Due to the dedication of continuous product improvement and enhancements the information dimensions provided are subject to change without notice 2 Sound attenuating plenum option can be combined with any filter section option 3 Sound attenuating plenum ships separately from base unit segment s 4 Option is not available with ducted connections 5 With ...

Page 69: ...ption 3 Sound attenuating plenum ships separately from base unit segment s 4 Option is not available with ducted connections 5 With this option the top row of filters can only be removed from the end of the filter rack 6 All dimensions in inches Figure 50 UNIT DIMENSIONS SOUND ATTENUATING PLENUM OPTION LSWU F 050 060 NO FILTER OPTIONS A 1 4 inch filter 82 00 2 4 inch Pre Filter 4 inch High Efficie...

Page 70: ...RATELY FROM BASE UNIT SEGMENT S OPTION IS NOT AVAILABLE WITH DUCTED CONNECTIONS WITH THIS OPTION THE TOP ROW OF FILTERS CAN ONLY BE REMOVED FROM THE END OF THE FILTER RACK 1 2 3 4 NOTES Figure 51 UNIT DIMENSIONS ALL MODELS INLET PLENUM LSWU F 070 105 NOTES 1 Sound attenuating plenum option can be combined with any filter section option 2 Sound attenuating plenum ships separately from base unit seg...

Page 71: ...uous product improvement and enhancements the information dimensions provided are subject to change without notice 3 2 Airside Economizer is shipped separately 4 3 All dimensions are in inches COIL SECTION FAN SECTION 3 86 FILTER SECTION AIRSIDE ECONOMIZER 55 47 55 47 55 47 11 51 26 47 43 41 78 32 26 47 34 22 A B 2 00 74 06 9 26 NO FILTER OPTIONS A B 1 4 inch filter 76 43 110 65 2 4 inch prefilter...

Page 72: ...inch high efficiency filter 86 25 120 47 COIL SECTION FAN SECTION 3 86 FILTER SECTION AIRSIDE ECONOMIZER 75 47 75 47 55 47 11 49 26 47 53 89 88 80 26 47 34 22 A B 2 97 92 06 8 26 NOTES Minimum interior duct dimensions 1 Due to the dedication of continuous product improvement and enhancements the information dimensions provided are subject to change without notice 2 Airside Economizer is shipped se...

Page 73: ...UNIT DIMENSIONS AIRSIDE ECONOMIZER OPTION LSW_070 105 NOTES 1 All dimensions are in English 2 Due to the dedication of continuous product improvement and enhancements the information dimensions provided are subject to change without notice 3 Airside economizer is shipped separately A B 4 25 118 00 8 26 101 47 7 36 35 47 50 22 COIL SECTION FAN SECTION FILTER SECTION AIRSIDE ECONOMIZER 12 52 101 47 ...

Page 74: ...s with cooling capability all concurrent loads with or without hot water or steam heat Field power wiring connected to incoming power termination point must be copper conductor only Aluminum wire cannot be connected to the incoming power ter mination point MCA 1 25 largest motor RLA or FLA plus other loads plus 2 amps For units with cooling capability and non concurrent electric heat the following...

Page 75: ...ed as OFF AUTO ON When the switch is in the AUTO or ON position the SD terminal on the terminal strip is en ergized through the rocker switch When the circuit is open the unit turns OFF the supply fan and terminates all normal operation This same circuit can be used as a means of institut ing an external shutdown command Wire 261 can be removed from terminal 3 SD of terminal block CTB1 and connect...

Page 76: ...and building designs can require that the unit be isolated from the supply and return duct sys tems The unit controller can control this field design and installation On these systems the Isolation Damp er must be opened before the Supply Fan Output can be turned on and it must be turned off once the Supply Fan Output is turned off If the Isolation Damper Control is User Enabled the PUMP AUX conta...

Page 77: ...C to 120VAC 6 Wire 261 must be removed from the SD terminal and connected to one side of a field installed normally closed contact The other side of the normally closed contact is connected to the SD terminal LD13325 mod PUMP START ALARM VAV HEAT Zone Temp Sensor FlexSys Slab Temp Sensor Caution 24 VAC switch voltage must be sourced from the unit Use of another power source external of the unit ma...

Page 78: ...s Ducted Return All ductwork connected to the unit should be of ad equate size and construction for the application A can vas type connecting collar is also recommended where the duct penetrates the machine room wall s This pre vents vibration generated by air movement in the duct from being transmitted out to the occupied spaces Failure to use the recommended duct collars could result in noise tr...

Page 79: ...t is recommended that Vitaulic couplings be used for the connection of the field piping to the unit Access to these joints is achieved by removing the access panel between the blower and evaporator coil compartment and removing the access panel on the left hand side of the evaporator coil com partment This restricted access makes it difficult to make a quality sweat joint 4 Reference the Unit Dime...

Page 80: ...eatment if any is required The product warranty specifically excludes liability for corrosion erosion or deteriora tion of equipment The heat exchangers in the units are tube and shell construction consisting of steel and cop per The water piping to the heat exchanger is copper There may be other materials in the building s piping system that the designer may need to take into con sideration when ...

Page 81: ...ressure sensor Improper location of the sensing point results in unsatisfactory operation of the entire variable air volume system The following guidelines should be adhered to 1 Plastic tubing 1 4 inch ID must be run from the high pressure tap of the duct static pressure trans ducer to a static pressure tap field supplied in the supply duct The static pressure probe should be mounted two thirds o...

Page 82: ...SUPPLY AIR TEMPERATURE DUCT STATIC TRANSDUCER 2 Optional not shown HIGH DUCT STATIC SAFETY SWITCH LD14416 Figure 59 DUCT STATIC TRANSDUCER LOCA TIONS Check that tubing complies with local code requirements Flame retardant plastic or metal tubing may be required Carefully select the ductwork sensing point for the pressure sensor Improper location of the sensing point results in unsatisfactory opera...

Page 83: ...CER INSTALLATION FLEXSYS UNITS ONLY All FlexSys units include a factory mounted static pres sure sensor SPS1 The unit can also have an option al second static pressure sensor SPS2 The second static pressure sensor would be used to get an average of the static pressure in the under floor space When two static pressure sensors are used the control can be programmed to maintain the lowest input highe...

Page 84: ... option is ordered The outdoor air sensor is shipped loose in the control enclosure and must be field installed and wired to the Unit Controller The sensor is supplied with 25 foot leads terminated to plug onto the Unit Controller If a longer length is required inline butt splices can be used to increase the length It is important the outdoor air sensor be located so it senses the true outdoor air...

Page 85: ...lectric heat assembly including the controls is con tained within the evaporator coil department FILTERS Standard filters are 30 4 inch As an option 4 inch fil ters can be ordered with efficiencies up to 90 A 30 4 inch prefilter can also be ordered with the 4 inch high efficiency filter option The filters are factory installed in the filter coil section of the unit prior to the evapora tor coil Fi...

Page 86: ...JOHNSON CONTROLS 86 FORM 145 05 NOM7 ISSUE DATE 10 31 2019 SECTION 2 INSTALLATION THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 87: ...s requirement can lead to compressor damage and voiding of the compressor warranty SECTION 3 START UP 5 Verify the unit condenser water connections and condensate drain connections have been piped 6 Check for proper water flow according to Deter mining Water Flow Condenser Only on page 98 and Determining Water Flow Waterside Economizer Active on page 98 7 The compressor oil level should be maintai...

Page 88: ...there is a rise in the discharge pressure and a decrease in the suction pressure when the compressor is energized the compressor is properly phased and operating in the correct rotation If the suction and discharge pressure remain approxi mately the same the rotation is not correct and the phasing to the compressor must be changed To do this turn off the power to the unit and switch any two of the...

Page 89: ...sure is 355 PSIG and the liquid tem perature is 96 0 F Saturation Temperature for 355 PSIG 108 0 F Minus the liquid line temp 96 0 F Liquid Line Subcooling of 12 0 F The subcooling should be between 5 0 F to 12 0 F with all compressors ON Superheat R 410A The superheat should be checked only after steady state operation of the unit has been established the dis charge air temperature has been pulle...

Page 90: ...9 105 34 14 36 110 36 16 33 115 39 18 30 120 41 20 28 125 43 22 26 130 45 24 24 135 47 26 20 140 49 28 18 145 51 30 16 150 53 32 14 160 57 34 12 170 60 36 10 180 64 38 8 190 67 40 6 200 70 42 4 210 73 44 3 220 76 46 2 225 78 48 0 235 80 50 1 245 83 52 3 255 85 54 4 265 88 56 6 275 90 58 7 285 92 60 8 295 95 62 10 305 97 64 11 325 101 66 13 355 108 68 14 375 112 70 15 405 118 72 16 500 134 74 17 60...

Page 91: ...V POE oil clear for units charged with R 410A refrigerant The type of refrigerant and amount per system is listed in SECTION 2 INSTAL LATION and on the unit rating plate A change in oil color or odor may be an indication of contaminates in the refrigerant system If this occurs an oil sample should be taken and analyzed If contaminates are pres ent the system must be cleaned to prevent compressor f...

Page 92: ...ce is performed on the fan section Failure to do so could result in serious injury or death due to the fan turning ON while work is in progress Squealing belts during starting is caused by slipping belts that are not tensioned properly Motor Bearing Lubrication Bearings must be re lubricated periodically to assure long life Motor bearing should be lubricated yearly but may need lubrication more fr...

Page 93: ...Release the tension on the belts by loosening the adjusting nuts on the fan motor 2 Remove old belts and recheck the sheave align ment with a straight edge 3 Install the new belts on the sheaves Figure 60 SHEAVE ALIGNMENT LD07634 CORD TOUCHING SHEAVES AT POINTS INDICATED BY ARROWS CORD TIED TO SHAFT Never place the belts on the sheaves by using a screw driver to pry the belt over the rim of the sh...

Page 94: ...sult in serious injury or death due to the fan turning ON while work is in progress Fan Motor 1 Shut off unit power and lock out 2 Disconnect and tag power wires at motor termi nals 3 Loosen motor brace to mounting rail attaching bolts 4 Mark belt as to position Remove and set aside belts 5 Remove motor bracket hold down bolts 6 Remove motor pulley and set aside 7 Remove motor 8 Install new motor ...

Page 95: ...ease fitting must be changed on bearings that utilize a locking pin under the fitting it is important to properly replace it If an adapter or grease fitting of improper size and length is used the locking pin may be either too tight or loose and can affect the alignment and re lubrication of the bearing Shaft should be free from burrs If old shaft is used be sure a ball bearing is not seated on wo...

Page 96: ...efill the waterside of the condenser and purge the air 10 Open the shut off isolation valves 11 Inspect the waterside coil clean out plug for leaks 12 Return the unit to normal operation On the mechanical cleanable coils each of the tubes has a clean out plug that is sealed with an O ring The specification of the O ring is 11 15 inch OD with a 3 32 inch width made from EPDM material Use McMaster P...

Page 97: ...7 05 200 27 81 7 73 7 73 210 30 30 8 43 8 43 Table 18 CONDENSER WATER PRESSURE DROP LSW_070 105 FEET OF W C WATER FLOW GPM CONDENSER ALL MODELS ADDITIONAL WATERSIDE ECONOMIZER WHEN ACTIVE LSW070 LSW085 LSW095 LSW105 100 3 2 1 7 1 5 1 4 1 4 120 4 3 2 4 2 1 2 0 2 0 140 5 7 3 1 2 7 2 6 2 6 160 7 2 4 0 3 5 3 4 3 4 180 8 8 5 0 4 4 4 2 4 2 200 10 6 6 1 5 4 5 1 5 1 220 12 5 7 3 6 4 6 2 6 2 240 14 6 8 5 7...

Page 98: ...adjustments should be made to the pump water system to correct DETERMINING WATER FLOW WATERSIDE ECONOMIZER ACTIVE 1 Check that the condenser valve is 100 open and the economizer is 100 open 2 Determine the differential water pressure between the inlet and outlet 3 Multiply the difference by 2 31 constant 4 This answer is the feet of W C that is flowing through the unit 5 Refer to Pressure Drop Tab...

Page 99: ...CY SCHEDULE Use the PROGRAM key of the User Interface to turn ON and OFF the Internal Time clock Programme the occupied unoccu pied schedule through the SCHEDULE key of the User Interface Within the CURRENT OPER MODE are 20 sub modes of operation OCCUPIED COOLING OCC COOLING LOW OCC COOLING HIGH OCC COOLING W BYP OCC COOLING W O BYP OCCUPIED HEATING OCC HEATING LOW OCC HEATING HIGH OCCUPIED STANDB...

Page 100: ...s apply The UNIT MODE is OCCUPIED Or the unit is in the MORNING WARMUP mode The Supply Fan is turned OFF if all of the following conditions are met The Supply Fan is ON for at least 60 seconds and the unit is in the UNOCCUPIED STANDBY mode The INACTIVE HEATING TIME is greater than or equal to 60 seconds The INACTIVE COOLING TIME is greater than or equal to 60 seconds The SUPPLY AIR TEMP is less th...

Page 101: ...ATING THAT IT NEEDS TO ACHIEVE AND MAINTAIN THE ACTIVE SUPPLY AIR TEMP SP 2 UNOCCUPIED SEQUENCE WILL BE THE SAME AS ABOVE EXCEPT THE ZONE TEMP SPs USED WILL BE THE UNOCC SP s VALUES 3 UNIT MODES WILL STAGE DOWN WHEN THE ZONE TEMP IS 5 F UNDER SPs FOR COOLING AND 5 F OVER SPs FOR HEATING LD010572 Figure 62 CONSTANT VOLUME SETPOINT DETERMINATION Zone Temperature Control When the CONTROL METHOD is se...

Page 102: ...ating or cooling demand This prevents the space temperature from getting out of bounds before mechanical heating or cooling is energized This is usually used when there is a large demand for outdoor air for ventilation If the Supply Air Temp is equal to or greater than the OCC ZONE COOLING SETPOINT plus 5 0 F the Unit Controller enters the COMFORT VENT COOLING mode and initiate com pressor operati...

Page 103: ...upply Fan is OFF for at least 60 seconds and one of the following condi tions apply The CURRENT OPER MODE is set to OCCU PIED Or the unit is in the MORNING WARMUP mode Or the UNIT MODE is UNOCCUPIED HEAT ING OR UNOCCUPIED COOLING The Supply Fan is turned OFF if all the following con ditions are met The Supply Fan has is ON for at least 60 seconds The unit is in the UNOCCUPIED STANDBY mode The INAC...

Page 104: ...duct system includes VAV boxes they must be driven open in BYPASS mode Failure to do so could result in damage to the ductwork and the building structure VAV Supply Fan Speed Control Set point Determination The following parameters must be set through the User Interface on the display of the unit DUCT PRESS TRANSDUCER SPAN SETPOINTS key SUPPLY SYSTEM subsection Thiscanbesetfor0 25 W C 1 25 W C 2 5...

Page 105: ...atic input If DUCT PRESS SENSOR 2 is set to ENABLED and DUCT PRESS CNTRL is set to AVERAGE the Unit Controller uses the average of analog inputs identified as DUCT STATIC PRESS CURRENT 1 and DUCT STATIC PRESS CURRENT 2 as the active duct static input The DUCT STATIC PRESS ACTIVE SP can be varied through the communicated input DSP_RST_ BAS AV05 If DSP_RST_BAS is set to 0 DUCT STATIC PRESS ACTIVE SP...

Page 106: ...s option tag Enable and set up the piezometer using the Unit Interface How It Works The System is based on the principle of a flow nozzle The inlet cone of the fan is used as the flow nozzle and the flow is calculated by mea suring the static pressure drop through the inlet cone The pressure drop is measured from the tap located on the face of the inlet cone to the piezometer ring in the throat Th...

Page 107: ... 32 COMEFRI 026 42644 100 026 42644 TBD 7847 3 15695 36C NAPAF 36C 026 42645 100 026 42645 TBD 10017 8 20036 LSWU070 36 9 blade EPF wheel special housing TWIN CITY 026 42645 101 026 42645 101 7032 01 14064 36 12 blade EPQ wheel special housing TWIN CITY 026 42645 102 026 42645 101 7032 01 14064 40 9 blade EPF wheel special housing TWIN CITY 026 42646 101 026 42646 101 855 41 1711 40 12 blade EPQ w...

Page 108: ...es can be used to increase the length It is im portant the return air sensor be located so it senses the true Return Air Temperature The sensor is connected at the J9 terminal strip terminals 3 and 4 Occupied Standby The Unit Controller determines there is no demand for cooling or heating based on the Current RAT and the corresponding Cooling RAT and Heating RAT set points The Supply Fan is ON and...

Page 109: ...until the ZONE TEMP is equal to or greater than the UNOCC ZONE HEATING SETPOINT plus 0 5 F A zone temperature signal must be pres ent for the unit to function If the unit is set for NIGHT SET BACK and goes unoccupied without a zone temperature signal it shuts down Variable Air Volume The SUPPLY AIR TEMP ACTIVE SP is always de rived from three programmed parameters SAT HIGH SETPOINT SAT LOW SETPOIN...

Page 110: ...PACTIVE SP to a value between the SAT HIGH SETPOINT and the SAT LOW SETPOINT If the SUPPLY FAN VFD SPEED is equal to or greater than the FAN SPEED SETP FOR LOW SAT the SUPPLY AIR TEMP ACTIVE SP is the SAT LOW SETPOINT If the SUPPLY FAN VFD SPEED is equal to or less than the FAN SPEED SETP FOR HIGH SAT the SUPPLY AIR TEMP ACTIVE SP is the SAT HIGH SETPOINT When the SUPPLY FAN VFD SPEED is between t...

Page 111: ...e is determined by the unit size compressor staging sequence and the num ber of starts Two compressors cannot be brought on at the same time and there is always at least a 15 second time delay between starting compressors System A Compressor 25 60 Ton Units Only The compressor used in System A on 25 60 ton units is a Copeland scroll compressor with digital unloading The digital unloading feature a...

Page 112: ...d for 0 5 seconds Energizing the unloader solenoid for this period of time allows the discharge and suction pressure to equalize minimizing scroll reverse rota tion Discharge Pressure Monitored The Unit Controller uses discharge pressure to control the water flow through the condenser Since the discharge pressure for System A varies when the compressor is at part load capacity the Unit Controller ...

Page 113: ...ompressor A at 33 of Capacity Stage 3 to 2 Compressor A Fully Loaded Stage 2 to 1 Compressor A at 66 of Capacity Stage 1 to 0 Compressor A at 33 of Capacity Three Compressor Units 050 and 060 Models UNIT SIZE must be set through the User Interface OPTIONS key UNIT DATA subsection The correct unit size is selected from the available options STAGING UP NEXT STAGE TO ENABLE Stage 0 to 1 Compressor A ...

Page 114: ...nent to compressor operation for each compressor This assists the Service Technician and assures equal wear on all of the compressors in the unit COMPRESSOR STARTS Each time one of the compressors state transitions from OFF to ON the COMPRESSOR STARTS is incremented by one where varies to match the compressor number the data is recorded for A B C etc View this data under the OPERATING HOURS START ...

Page 115: ...tive concurrently the following priority level in Table 22 on page 115 is used to de termine which of the above to display The greater the number the higher the priority The highest priority criteria is displayed Table 22 COMPRESSOR STATUS PRIORITY LEVEL PRIORITY LEVEL MESSAGE 1 Ready 2 Comp On 3 Off Ascd 4 Inhibited 5 Safety Trip 1 6 Safety Trip 2 7 User Disabled 8 Safety Lockout 9 Low Press Lock...

Page 116: ... 25 60 Ton If the compressor A goes offline because of the cir cuit breaker it indicates a Fault Code 3 on the Digital Compressor Controller and results in the opening of the compressor safety circuit The circuit breaker must be manually reset as well as resetting the Compressor lockout through the Unit Controller before the com pressor is able to operate Circuit Breaker Compressor Systems B F If ...

Page 117: ...AFETY LOCKOUT The HISTORY buffer stores and display COMP SAFETY LOCKOUT The symbol varies to match the compressor number the data is recorded for A B C etc Low Pressure Monitoring The units use a Suction Pressure Transducer in lieu of a Low Pressure Cutout The Unit Controller monitors the suction pressure in each active compressor system and compares it to a SUCTION PRESSURE LIMIT 90PSIG on this R...

Page 118: ... it has exceeded its time delay There may be other variables built into the logic on the board that might delay the compressor from actually run ning 8 Select the COMPRESSOR SYSTEMS key and use the key or the key to COMPRESSOR B if necessary The status either shows READY or RUN if all safeties are clear LD21627 9 Select key to display the following if all safe ties are met LD21628 If the display s...

Page 119: ...gerant discharge pressure for proper compressor op eration is needed A water flow sequence requires set up on site using third party controls such as binary or analog controls or BAS building automation system Otherwise no recommendations are made for this ex cept for having the factory ordered controls This section describes the different control and opera tion scenarios the LSWU unit could have ...

Page 120: ...PSIG DISCHARGE PRESSURE SP MAX default is 400 PSIG If a flow switch is installed see the following sections Sequence of Operation The condenser actuator driven valve is inverse acting When the voltage output to the valve is 10VDC the valve is closed When the voltage output to the valve is 2VDC or less the valve is wide open The CONDENS ER WATER VALVE analog output is located at J15 8 DISCHARGE PRE...

Page 121: ... HIGH OCCU PIED COOLING OCC COOLING LOW OCC COOLING HIGH OCC COOLING W BYP OCC COOL W O BYP or COMFORT VENT COOLING Compressors are OFF for at least 60 seconds COND WATER SYSTEM is Variable Flow CONDENSER WATER SYSTEM is Constant Flow The COND WATER VALVE analog output is open 100 when all three of the following conditions are present CURRENT OPER MODE is in STANDBY and UNOCCUPIED COOLING UNOCC CO...

Page 122: ...ssors running CURRENT OPER MODE is UNOCCUPIED or OCCUPIED COOLING STANDBY default is 50 Cooling Becomes Active The COND WATER VALVE analog output is 2VDC 100 and the BYPASS WATER VALVE at 2 VDC 0 when a call for cooling using the compressors be comes active The COND WATER VALVE analog output is 10VDC 0 when the unit is NOT COOLING OCCUPIED or UNOCCUPIED STANDBY and the valve is closed when there a...

Page 123: ...he unit is cold enough the condenser water is circulated through the factory water coil for cooling and this cools the ducted air to the space Economizer The following parameters must be programmed into the Unit Controller through the User Interface to en able economizer operation OPTIONS key ECONOMIZER subsection ECONO INSTALLED and the choices are NONE DRYBULB SINGLE ENTHALPY DUAL ENTHALPY and W...

Page 124: ...Controller through the User Interface OPTIONS key CONDENSER subsection COND VALVES INSTALLED should be set to COND ONLY CONDENSER TYPE should be set to WA TER COOLED OPTIONS key ECONOMIZER subsection ECONO INSTALLED should be set to WATERSIDE ECONO METHOD TO USE should be set to WATERSIDE PROGRAM key CONDENSER subsection COND WATER CONTROL should be set to ENABLED ECONOMIZER CONTROL should be set ...

Page 125: ...se scenarios are in ef fect when the front rock switch is in the ON or AUTO position and the unit is ready to operate STATE 1 OPERATION Press STATUS key and use the UP or DOWN to navigate to CURRENT OPER MODE the unit display is either OCCUPIED STANDBY or UNOCCUPIED STANDBY No Cooling Needed The CONDENSER WATER VALVE analog out put is 10VDC 0 The ECONOMIZER VALVE analog output is 2VDC 0 STATE 2 OP...

Page 126: ...ntrolled by either the ECONOMIZER PI or the CONDENSER PI whichever is the lowest STATE 4 OPERATION CURRENTOPER MODE is UNOCCUPIED or OCCUPIED COOLING econo mizer is active and no compressors are ON The CONDENSER WATER VALVE analog out put is set to 10VDC 0 The ECONOMIZER VALVE analog output is controlled by the ECONOMIZER PI TRANSITION FROM STATE 4 TO 2 ECONO MIZER INACTIVE The CONDENSER WATER VAL...

Page 127: ... the unit s STA TUS is CURRENT OPER MODE UNOCCUPIED STANDBY or OCCUPIED STANDBY There is no call for cooling at this moment Cooling Becomes Active The COND WATER VALVE analog output is 2VDC 100 when the unit s STATUS is CURRENT OPER MODE UNOCCU PIED or OCCUPIED COOLING and no compressors are ON at this moment When one of the compressors come ON the COND WATER VALVE analog output is controlled by t...

Page 128: ...e following Starts a countdown timer to countdown the time indicated by the FLUSH DELAY TIME setpoint Wait until the timer expires Turns the PUMP START BO to ON Changes the CURRENT OPER MODE to FLUSHING ECONO COIL Drives the COND WATER VALVE to 0 10 VOLTS Drives the ECONOMIZER WATER VALVE to 100 10 VOLTS Waits 3 minutes Drives the COND WATER VALVE to COND VALVE MIN POS Drives the ECONOMIZER WATER ...

Page 129: ... ISOLATION DAMPER must be opened before the SUPPLY FAN OUTPUT is turned on and it must be turned off once the SUPPLY FAN OUTPUT is turned off If the ISOLATION DAMPER CONTROL is User En abled the PUMP AUX contacts is turned ON when the preceding conditions are met and when these con ditions remain in force for 120 seconds The SUPPLY FAN OUTPUT is energized after a delay for 120 sec onds to assure a...

Page 130: ...ould be set with these choices DRY BULB SINGLE ENTHALPY DUAL ENTHALPY BEST AVAILABLE SETPOINTS key ECONOMIZER subsection set depending on the control method type selected for AIR ECONOMIZER SETPOINTS key either using SINGLE EN THALPY DUAL ENTHALPY BEST AVAIL ABLE This setpoint possibly needs to be set to OUTSIDE AIR ENTHALPY SETPOINT de fault is 28 BTU Normally the LSWU units do not come with an o...

Page 131: ...able The Dry Bulb method is used if only the OAT SENSOR RELIABLE is true The Single Enthalpy method is used if both the OAT SENSOR RELIABLE and the OA HUMIDITY SENSOR RELIABLE are true The Dual Enthalpy method is used if the OAT SENSOR RELIABLE RET SENSOR RELIABLE OA HUMIDITY SEN SOR RELIABLE and the RA HUMIDITY SEN SOR RELIABLE are all true With this setting all of the above logic for Dry Bulb Si...

Page 132: ...ce Supply Air Tempering uses the unit s heating source to raise the Supply Air Tempera ture to an acceptable level For Supply Air Tempering to be active the following items must be programmed into the Unit Controller Under the PROGRAM key HEATING subsection HEATING SYSTEM must be set to USER EN ABLE Under the PROGRAM key COOLING subsec tion SUP AIR TEMPERING must be set to USER ENABLE The Supply A...

Page 133: ...P ACTIVE SP for 5 minutes Comfort Ventilation For this mode of operation to function the following parameters must be programmed into the Unit Control ler through the User Interface OPTIONS key UNIT DATA subsection UNIT TYPE must be set to CONSTANT VOLUME PROGRAM key VENTILATION subsection COMFORT VENTILATION must be USER ENABLED SETPOINTS key COOLING subsection OCC ZONE COOLING SETPOINT must be s...

Page 134: ...e nearest 1 2 degree If HEATING CONTROL OFFSET is calculated to be less than 2 0 F it is set to 2 0 F If the UNIT MODE COMFORT VENT HEATING or SUPPLYAIR TEMPERING is active the HEAT ING CONTROL OFFSET is fixed at 5 0 F Active SAT SP See Table 19 on page 102 to determine what the SUPPLY AIR TEMP ACTIVE SP value is for Con stant Volume units On VAV and FlexSys units the SUPPLYAIR TEMPACTIVE SP is th...

Page 135: ...amount of heat When UNDER FLR TEMP OVRD is active the valve is controlled to UNDERFLOOR TEMP CONTROL SP The Unit Controller sends a 0 to 10 VDC signal to the hot water or steam valve as described below If the unit is configured for DIRECT an increase in heating demand results in an increase in output voltage to the valve If the unit is configured for REVERSE an in crease in heating demand results ...

Page 136: ...T VOLUME units 2ND STAGE HEATING SETPOINT 6 The heat source remains energized until the Re turn Air Temperature is greater than or equal to the RAT HEATING SETPOINT plus 0 5 F the Morning Warm Up command is removed or the unit switches to OCCUPIED mode Adaptive Morning Warm Up Adaptive Morning Warm Up can only be used when the internal schedule function is employed to switch the unit from UNOCCUPI...

Page 137: ...t source is energized as described below a If the heat source is terminated because it is within 0 5 F of the RAT HEATING SETPOINT the Unit Controller replaces the Day 3 time with the Day 2 time the Day 2 times with the Day 1 time and the Day 1 time with the current value It averages the 3 values and adds 10 minutes which becomes the new MORNING WARM UP OPT TIME for the next day b If the heat sour...

Page 138: ... with a dirty filter switch in stalled to monitor the pressure drop across the filters The 24VAC binary input to the Unit Controller can be found at connector J13 terminal 4 The following parameter must be programmed into the Unit Controller OPTIONS key UNIT DATA subsection DIRTY FILTER SWITCH must be set to INSTALLED Sequence of Operation When the pressure drop across the filters exceeds the sett...

Page 139: ...elow Evap Leaving Air Temp High SP 58 0 F Evap Leaving Air Temp Low SP 55 0 F Duct Static SP 0 05 W C Heating SAT SP 80 0 F On a FlexSys unit the MX SAT is the tem perature of the supply air off the evapora tor coil mixed with the warmer return air that is bypassed around the evaporator coil The bypassed return air is introduced directly under the supply air fan FlexSys Current Operating Mode Occu...

Page 140: ...er These algorithms and internal logic are not user adjustable Bypass Damper Position This is the actual position of the bypass damper The bypass damper should be able to drive between 0 and 100 Bypass Damper Operation The operation of the by pass damper is slow and the logic that drives the damp er is quite complicated When the unit is in normal op eration it could take up to 40 minutes for the b...

Page 141: ... the active MX SAT SP FlexSys Heating OCCUPIED UNOCCUPIED heating operation fol lows the same sequence as a VAV configured unit It is recommended to limit the HEATING SAT SP to 80 0 F or 90 0 F This prevents the underfloor concrete slab from becoming too warm and radiating heat for an extended period of time after heating operation has been terminated FlexSys Under Floor Temperature Control Dew Po...

Page 142: ...Temp Override becomes Active The Underfloor Temp Control SP is set to the RAT SP plus 10 0 F The Unit Controller generates a call for heat a If staged heat staged gas or electric the Unit Controller starts the first stage of heat b If modulating modulating gas or hot water steam the Unit Controller controls the SAT to the UNDERFLOOR TEMP CONTROL SP Heating operation continues until a The Underfloo...

Page 143: ...ad offers a multitude of commands available to access displays program pa rameters and initiate system commands The keypad consists of thirty six keys that are divided into three categories Data Entry Navigation and Menu Selec tion keys Adescription of each of the keys is contained below Data Entry Keys The Data Entry Keys provide a means to enter values for items that support edits The keys avail...

Page 144: ... the key is pressed pressing any Menu Select key brings the user to the first screen under that menu even if it is the same menu being viewed Navigation through the circular list of items can also be achieved by repeated presses of the same Menu Select key as long as no other keys are pressed For example pressing the UNIT DATA key three times brings the user to the third screen of the UNIT DATA me...

Page 145: ...ip safety fault safety lockout user disabled Derived Always Comp System B Status Normal on normal off safety trip safety fault safety lockout user disabled Derived Always Comp System C Status Normal on normal off safety trip safety fault safety lockout user disabled Derived Unit size greater than or equal to 39 tons Comp System D Status Normal on normal off safety trip safety fault safety lockout ...

Page 146: ...s Control Method 1 Wire Zone Temp Comm Zone Temp Wire Zone Temp UNIT TYPE equals CONSTANT VOLUME or NIGHT SET BACK is USER ENABLED Return Air 2 Outside Air Return Air Supply Fan Speed None None VAV only Supply Air Temp Current 20 0º F to 180 0º F Look Up Table UNIT TYPE equals CONSTANT VOLUME or VARIABLE AIR VOLUME Active SP 50º F to 150º F Derived Mixed Supply Air Temp Current 20 0º F to 180 0º F...

Page 147: ...ating Plus 2 0º F to 85 0º F 72 0º f Zone Temp Current 20 0º F TO 180 0º F Look up table Unit is UNOCCUPIED and NIGHT SET BACK is ENABLED Unocc Zone Cooling Setpoint 1 UNOCC Zone Heating Plus 2 0º F to 95 0º F 85 0º f Return Air Temp Current 20 0º F to 180 0º F Look up table UNIT TYPE equals VARIABLE AIR VOLUME or FLEXSYS Rat Cooling Setpoint 1 RAT heating setp PLUS2º F to rat for high sat 70 0º f...

Page 148: ...ived Always Compressor A Load 0 33 67 100 Derived Comp A Only Comp System State 1 Stop Run Lockout Auto Reset Derived Always Safety Input Chain Okay faulted Derived Always Avg Pressure Discharge A 0 to 650 PSIG Derived Comp A Only Suction A 0 to 400 PSIG Derived Comp A Only Pressure Discharge 0 to 650 PSIG Look Up Table Always Suction 0 to 400 Look Up Table Always Current Run Time HH MM SS Derived...

Page 149: ...ived Duct Static Press 1 0 00 to 5 00 W C Look Up Table UNIT TYPE equals VARIABLE AIR VOL UME or FLEXSYS and Duct Pressure Sensor 2 is set to ENABLED Press 2 0 00 to 5 00 W C Look Up Table Duct Static Press Average 0 00 to 5 00 W C Look Up Table UNIT TYPE equals VARIABLE AIR VOLUME or FLEXSYS Duct Pressure Sensor 2 is set to ENABLED and Duct Press Cntrl is set to AVERAGE Active SP 0 00 to 5 00 W C...

Page 150: ...oint 1 50 0º F to Unocc Zone Cool ing Setpoint 2 0 F 60 0 F Return Air Temp Current 20 0 F to 180 0 F Look Up Table Heat Type does not equal NONE and unit equals VARIABLE AIR VOLUME or FLEXSYS RAT Heating Setpoint 1 55 0º F Rat Cooling Setpoint 2 0 F 68 0 ºF Staged Heat Status Stgs On 0 to 6 Derived Heat Type equals ELECTRIC Stgs Aval 1 to 6 Derived HW Steam Valve Pos 0 0 to 100 Derived Heat Type ...

Page 151: ...lled is other than NONE Outside Air Temp 20 0 F to 180 0 F Look Up Table Always Outside Air Humidity 0 to 100 Look Up Table Economizer Installed equals SINGLE ENTHAL PY or DUAL ENTHALPY Enthalpy 7 2 to 204 9 BTU Lb Look Up Table Return Air Temp 20 0 F to 180 0 F Look Up Table Always Return Air Humidity 0 to 100 Look Up Table Economizer Installed equals DUAL ENTHALPY Enthalphy 7 2 to 204 9 BTU Lb L...

Page 152: ... Enabled User Disabled User Enabled Cond Valve Installed is not NONE Cond Valve Installed 2 None Cond Only Cond W Bypass Cond Only Condenser Type is WATER COOLED Cond Water Valve Pos Cond Valve Min Pos To 100 Derived Cond Valve Installed is COND ONLY or COND W BYPASS Bypass Valve Position 0 To Cond Bypass Max Pos Derived Cond Valve Installed equals COND W BYPASS Discharge Press Minimum 0 0 to 650 ...

Page 153: ...ne Heating Setpoint to 85 0 F 72 0 F Setpoint Cooling UNOCC Zone Cooling Setpoint 2 0 F above UNOCC Zone Heat ing Setpoint to 95 0 F 85 0 F Setpoint Cooling RAT Cooling Setpoint 2 0 F above RAT Heating Setpoint to RAT for High SAT 70 0 F Setpoint Cooling Maximum Bypass 20 0 to 40 0 40 00 Setpoint Cooling Ist Stage Cooling Setpoint SAT SP for CV 55 0 F to 65 0 F 60 0 F Setpoint Cooling 2nd Stage Co...

Page 154: ...ture 100 0 F to 150 0 F 130 0 F Setpoint Heating Heating Sat 80 0 F to 115 0 F 100 0 F Setpoint Heating 1st Stage Heating Setpoint 80 0 F to 95 0 F 85 0 F Setpoint Heating 2nd Stage Heating Setpoint 95 0 F to 115 0 F 100 0 F Setpoint Heating Morning Warm up Max Time 15 Min to 240 Min 120 MIN Setpoint Economizer Outside Air Enthalpy Setpoint 22 0 BTU to 40 BTU 28 BTU Setpoint Economizer Water Econo...

Page 155: ...sh Program Unit Data Display Units Imperial Metric Imperial Program Unit Data Control Method1 Wire Zone Temp Comm Zone Temp Wire Zone Temp Program Unit Data Clock Schedule User Enabled User Disabled User Disabled Program Unit Data Isolation Damper Control User Enabled User Disabled User Disabled Program Cooling Active Slab Control User Enabled User Disabled User Disabled Program Cooling Dew Point ...

Page 156: ...r Disabled User Disabled Program Heating Adapt Morn Warm Up User Enabled User Disabled User Disabled Program Heating Night Set Back Note 1 User Enabled User Disabled User Disabled Program Economizer Economizer System User Enabled User Disabled User Disabled Program Economizer Econo Method to Use Dry Bulb Single Enthalpy Dual Enthalpy Waterside Waterside Program Ventilation Ventilation System User ...

Page 157: ...ord is entered it remains active for 15 minutes Table 38 OPTIONS USER INTERFACE KEY SUBSECTION DISPLAYED TEXT RANGE DEFAULT VALUE UNIT SETTING Options Unit Data Unit Type Constant Volume Variable Air Volume FlexSys Variable Air Volume Options Unit Data Unit Size 12 105 Ton 25 Options Unit Data Freezestat Not Installed Installed Not Installed Options Unit Data Refrigerant Type R22 R409c R410a R410a...

Page 158: ...s the SCHEDULE key The display shows the following message Schedule To Edit Occupancy Schedule User Enabled Schedule Mon To Edit Start 06 00 AM Stop 10 00 PM Schedule Tue To Edit Start 06 00 AM Stop 10 00 PM Schedule Wed To Edit Start 06 00 AM Stop 10 00 PM Schedule Thu To Edit Start 06 00 AM Stop 10 00 PM Schedule Fri To Edit Start 06 00 AM Stop 10 00 PM Schedule Sat To Edit Start 06 00 AM Stop 1...

Page 159: ...e key or the key is pressed To set the Holiday the cursor moves to the space following the day of the week of the holiday and the key is pressed An appears in the space signifying that day as a holiday The Holiday schedule must be programmed weekly If there is no holiday the key is used to delete the The key is used to accept the holiday schedule for the next seven days OPERATING HOURS START COUNT...

Page 160: ...erminal window When the reports finish transferring to the file se lect Transfer Capture Text Stop The file can be printed from an application like Notepad or Word To use Hyper Terminal to print a report without saving it to a file Select Transfer Capture to Printer From the Unit Controller panel select the report you want to print See Report Section on this page to select the report As the report...

Page 161: ...an be used to jump to the beginning of the next section of displays and the key can be used to jump to the beginning of the previous section of dis plays The sections of displays are as follows Parameters Data Log Format Data Log Error Update Flash Update Flash Error Factory Run Test Digital Outputs Analog Outputs Analog Inputs Digital Inputs Communication BAS Input Status Unit Controller Internal...

Page 162: ...tem C Suc tion Pressure Transducer Pressure Suc tion D Analog Input J7 4 0 5 Volts I O Board Analog Input from the System D Suc tion Pressure Transducer Pressure Suction E Analog Input J8 2 0 5 Volts I O Board Analog Input from the System E Suc tion Pressure Transducer Pressure Suction F Analog Input J8 4 0 5 Volts I O Board Analog Input from the System F Suc tion Pressure Transducer Return Air Hu...

Page 163: ...t P1 30 00BTU The Reset Enthalpy SP can be pro vided through the BAS RA Diff BAS Commun Port P1 User Enabled Dis abled IPU Board Enables the Return Air Differential to be done through the BAS Return Air Diff SP BAS Commun Port P1 6 00 degrees F Supply Air Temp Reset BAS Commun Port P1 0 to 5 Volts IPU Board The Supply Air Temperature Reset Value Being Communicated to the Unit through the Bas Syste...

Page 164: ...tatus Digital Input J13 4 Okay Change I O Board Digital Input from the Dirty Filter Pres sure Switch Hw Steam Frz Stat Digital Input J13 6 Okay Faulted I O Board Digital Input from the Hot Water Freezestat Local Stop Digital Input Tb01 3 Run Stop I O Board Digital Input that Turns the Unit On And Off Alarm Digital Output Tb1 7 8 Okay Faulted I O Board Digital Output that is Generated when there is...

Page 165: ...Status of Electric Heat Digital Output to Stage 2 Electric Heat Stg 3 Digital Output J31 3 On Off I O Board Status of Electric Heat Digital Output to Stage 3 Electric Heat Stg 4 Digital Output J31 4 On Off I O Board Status of Electric Heat Digital Output to Stage 4 OCC UNOC Indication Digital Output Tb1 9 10 On Off I O Board Gives the Occupied Unoccupied Status Pump Start or Isolation Damper Digit...

Page 166: ...n Odd Ignore Do not Change from Default Value for BACNET P1 Protocol BACNET API Keep Setting on BACNET P1 Stop Bits 1 2 Do not Change from Default Value for BACNET P2 Baud Rate 1200 4800 9600 19200 38400 57600 Establishes the Communication Baud Rate for Port 2 P2 Manual MAC Address 1 to 127 Allows the Manual Entrance of the MAC Address for Port 2 See Section 6 Communication P2 Parity None Even Odd...

Page 167: ...fault The History information can be viewed after entering the Level 2 password When the HISTORY key is pressed the first active warning is displayed If there are not any active warn ings HISTORY 1 is displayed If there are no faults NO FAULT is displayed Data is not saved for warn ings Data is saved for faults When a warning is displayed the key advances to the next warning or HISTORY 1 after the...

Page 168: ...IT DATA History 03 Unit Data Unit Type Constant Volume The X or HISTORY key is pressed to go back to the fault display History 03 30 Oct 2004 02 11 23 PM WRN low water temp From fault display the X key can be pressed to return to the Power Up Banner display PASSWORD Passwords are used to allow restricted access to the modification and viewing of certain parameters using the Setpoints Program Optio...

Page 169: ...s I O Modbus Server Modbus Client or Terminal Other Building Automation system networks can be connected by us ing a router The printer communication uses ASCII protocol and RS 232 hardware Communication Ports The IPU Control board Figure 69 on page 170 has two serial communication ports BACNET MS TP must use Port 1 and Terminal must use Port 2 which is the RS232 Port BACNET Wiring All BACNET devi...

Page 170: ... CONTROLS 170 FORM 145 05 NOM7 ISSUE DATE 10 31 2019 SECTION 6 USER INTERFACE CONTROL CENTER Figure 80 IPU CONTROL BOARD LD14084 I O CONTROL BOARD I O CONTROL BOARD PORT 1 PORT 1 IPU IPU DIP SWITCH DIP SWITCH ...

Page 171: ...e 81 MAC ADDRESS SWITCHES LD10821 In most applications the above procedure allows the Device Object Instance DE to be established Some applications may request that the Device Object In stance DE be set to a given value This can be done through the User Interface To do this you would use the DE MODIFIER ADDRESS in conjunction with the DE MODIFIER OFFSET Using this feature the Device Object Instanc...

Page 172: ...519 Actual Bypass Damper Position BYP_VALV_ POS Bypass Valve Position R AI64 577 The Analog Output from the Control to the Bypass Valve COMFORT_ VENT Comfort Ventilation R W AI2 1103 Gives the Status of the Comfort Vent Option and Allows it to be Turned On and Off 0 Off 1 On COMP_A Compressor A R BI03 1284 Status of Compressor A On Off COMP_B Compressor B R BI04 1285 Status of Compressor B On Off ...

Page 173: ...rip 2 3 Comp On 4 Low Pressure Lockout 5 Inhibited 6 Safety Lockout 7 Off Ascd 8 User Disabled COMP_F_ STAT Comp Sys F Status R AI71 584 Identifies The Status of the Compressor F 0 Ready 1 Safety Trip 1 2 Safety Trip 2 3 Comp On 4 Low Pressure Lockout 5 Inhibited 6 Safety Lockout 7 Off Ascd 8 User Disabled COMP_ STAT_A Safety Input Chain A R BI12 1293 Status of Compressor A Compressor Safety Circu...

Page 174: ...be Turned On and Off on FlexSys Units 0 Off 1 On DSP_HI_SP Duct Static High Setp R W AV03 1028 The Duct Static Upper Setpoint WG DSP_LO_SP Duct Static Low Setp R W AV04 1029 The Duct Static Lower Setpoint WG DSP_RST_ BAS Duct Static Pres Rst Bas R W AV05 1030 A BAS Entered Value that Results in a Reset Down from the Duct Static High Limit Based on a Percent of the Difference Be tween Duct Static H...

Page 175: ...ifies the Status of the Binary Output to the Indicated Heating Section Off On FURN_ OUT_4 Electric Heat Stage 4 R BI29 1310 Identifies the Status of the Binary Output to the Indicated Heating Section Off On HEAT_EN ABLE Heating System R W AV83 BV7 1108 A Communicated Input that Allows the Heat ing Function to be Turned On and Off 1 Enabled 0 Disabled HEATING_ SAT Heating Sat R W AV09 1032 The Heat...

Page 176: ...ng Fixed Ventilation Con trol when the Supply Fan is at 50 of Full Speed OA_EN THALPY Outside Air Enthalpy R AI26 539 Actual Outside Air Enthalpy BTU LB OA_ENTH_ SP OA Enthalpy Setp R W AV18 1043 The Upper Enthalpy Limit to Allow the Use of Outdoor Air for Single or Dual Enthalpy Economizer BTU lb NOTE This value only appears if the unit has an airside economizer and is set to monitor the value OA...

Page 177: ...ure Setpoint for Condenser Water Control PR_DIS_SP MAX Discharge Pressure Sp Max R W AV46 1071 Establishes the Minimum Discharge Pres sure Setpoint for Condenser Water Control PRS_A_ DISCH Pressures Discharge A R AI31 544 Actual Comp A Discharge Pressure PSI PRS_A_ SUCTION Pressures Suction A R AI32 545 Actual Comp A Suction Pressure PSI PRS_B_ DISCH Pressures Discharge B R AI33 546 Actual Comp B ...

Page 178: ...Off Yes No RDY_STOP_ C1A Ready to Stop Comp A R BI46 1327 Identifies if Compressor A is Ready to Stop if the Compressor is Running Yes No RDY_STOP_ C1B Ready to Stop Comp B R BI47 1328 Identifies if Compressor B is Ready to Stop if the Compressor is Running Yes No RDY_STOP_ C2A Ready to Stop Comp C R BI48 1329 Identifies if Compressor C is Ready to Stop if the Compressor is Running Yes No RDY_STOP...

Page 179: ...Mode R AI86 599 This Gives the Status of the VFD Bypass Mode 0 VFD Active 1 VFD Bypassed STG_1_ COOL Stage 1 Cooling R W AV31 1056 For a Constant Volume Unit this is the Ac tive SAT Setpoint for a First Stage Cooling Demand F STG_1_ HEAT Stage 1 Heating R W AV32 1057 For a Constant Volume Unit this is the Ac tive SAT Setpoint for a First Stage Heating Demand F STG_2_ COOL Stage 2 Cooling R W AV33 ...

Page 180: ... to Input a Under Floor Humidity Value to the Control on a FlexSys System Under FLR HUMI BAS Must be Enabled Using the Service Key to Use this Feature UND_TEMP_ BAS Under Floor Temp Bas R W AV37 1062 This Allows the BAS System to Input a Under Floor Temperature Value to the Control on a FlexSys System F Under FLR TEMP BAS Must be Enabled Using the Service Key to Use this Feature UNIT_MODE Unit Mod...

Page 181: ... Sys Status R AI89 602 Identifies the Status of the Ventilation System 0 Normal Inactive 1 Normal Active 3 None 4 Disabled WTR_ECN_ DLTA Water Econo Delta R W AV44 1069 This Item is Used in the Determination of when Waterside Economizer becomes Active F WTR_ECN_ MIN Water Econo Min Pos R W AV45 1070 The Minimum Allowable Opening for the Water Economizer Valve WTR_ FLOW_SW Water Flow Switch R BI71 ...

Page 182: ...JOHNSON CONTROLS 182 FORM 145 05 NOM7 ISSUE DATE 10 31 2019 SECTION 6 USER INTERFACE CONTROL CENTER THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 183: ...programmed through the PROGRAM key Adaptive Morning Warm Up uses the past three days of warm up times and temperatures to calcu late the start time for the current day This parameter allows the user to enable or disable this feature AIR FLOW This is a calculated amount of Cubic Feet of Air CFM leaving the blower measured through the Piezometer mounted in the unit The correct altitude and K factory...

Page 184: ...led Warning Safety Trip Safety Fault Safety Lockout Low Amb Inhibit COMP SYS E STATE This parameter is programmed through the PROGRAM key and can be used to manually establish the state of Compressor E system It is also used to reset a compressor that is locked out The options are stop run and lockout COMP SYS E STATUS This is the current operating mode of Compressor E The display shows Normal Ina...

Page 185: ... is the amount of time the compressor A has been in operation during the current cycle CURRENT RUN TIME COMP B This is a derived value and is the amount of time the compressor B has been in operation during the current cycle CURRENT RUN TIME COMP C This is a derived value and is the amount of time the compressor C has been in operation during the current cycle CURRENT RUN TIME COMP D This is a der...

Page 186: ... is programmed through the SETPOINTS key and is the mini mum discharge pressure the unit controller tries to maintain by modulating the condenser water flow DISCHARGE PRESSURE SP Max This parameter is programmed through the SETPOINTS key and is the maxi mum discharge pressure the unit controller tries to maintain by modulating the condenser water flow DISPLAY LANGUAGE This parameter is programmed ...

Page 187: ... Waterside ECONO METHOD ACTIVE This is a derived value an indicates which of the available economizer methods the Primary Unit Controller is using ECONO METHOD TO USE This parameter is programmed through the PROGRAM key and tells the Prima ry Unit Controller which of the available economizer options to use The choices are Dry Bulb Single Enthalpy Dual Enthalpy Best Available Waterside ECONO SYS ST...

Page 188: ...abling this function but they cannot be used together for the same unit HEAT LIMIT TEMPERATURE This parameter is programmed through the Setpoints key This value determines the maximum allowable supply air temperature when heating is installed If the temperature goes above this setting the heat section is shut down HEATING CONTROL OFFSET This is a derived value and is the control band the unit is t...

Page 189: ...p mode MX SUPPLY AIR TEMP CURRENT This is the actual temperature of the supply air supplied by the unit configured for FlexSys operation MX SUPPLY AIR TEMP SETPOINT This parameter is programmed through the Setpoints key This becomes the Active Supply Air Temperature Setpoint for a FlexSys unit when it is in the Oc cupied Cooling Without Bypass mode NIGHT SET BACK This parameter is programmed throu...

Page 190: ...is used to set the Protocol for Port 1 P1 STOP BITS This parameter is programmed through the Service key It is used to set the Stop Bits for Port 1 P2 BAUD RATE This parameter is programmed through the Service key This establishes the speed at which the Unit Controller communicates with a BAS system for com munication Port 2 P2 MANUAL MAC ADDRESS This parameter is programmed through the Service ke...

Page 191: ...me has been achieved and all the safety circuits are closed and compressor A is ready to be energized The User Interface displays either YES or NO READY TO RUN COMP B This is a derived value and means the minimum OFF time has been achieved and all the safety circuits are closed and compressor B is ready to be energized The User Interface displays either YES or NO READY TO RUN COMP C This is a deri...

Page 192: ...er from the Compressor Safety Circuit Chain for compressor C This includes the high pressure cutout and may include the compressor protection module Okay means the safety circuit is normal and Faulted means it has faulted SAFETY INPUT CHAIN D This is a derived value and is the binary input to the Primary Unit Controller from the Compressor Safety Circuit Chain for compressor D This includes the hi...

Page 193: ...ncy of the supply fan VFD SUPPLY FAN VFD SPEED This is a derived value that indicates the output in percent to the Supply Fan VFD SUPPLY SYS STATUS This is the active status of the Supply System display shows Normal Active Normal Inactive Safety Trip Safety Fault or Safety Lockout SYSTEM STOP This value is found under the Service key and identifies if a compressor stop signal is communicated from ...

Page 194: ...e Unit Controller from a flash card VAV HEAT RELAY This is a binary output that could be used to signal the VAV boxes to open dur ing Morning Warm Up operation VENT OVERRIDE This field 2 to 10VDC can be used to control the operation of the outdoor air damper VENT SYS STATUS This is the active status of the Ventilation System The display shows Normal Active Normal Inactive Safety Trip Safety Fault ...

Page 195: ...ly side of the duct to a 1 to 5VDC voltage The DC voltage is sent to the Unit Controller and compared against the DUCT STATIC PRESS ACTIVE SP The transducer is factory wired but pneumatic tubing must be field supplied and installed re fer to Section 2 INSTALLATION in this manual The duct static pressure transducer measures differential pres sure between the pressure in the duct and atmospheric pre...

Page 196: ...vert the suction pressure to a DC voltage The DC voltage is sent to the Unit Controller where it is displayed by the User Interface When this option is installed the Unit Controller also calculates and dis plays the Evaporator Superheat value for the system On units with R 410A refrigerant the Suction Trans ducer has a range of 0 to 400 PSIG with a linear output of 0 to 4 5VDC Table 46 illustrates...

Page 197: ...T VOLTAGE VDC RELATIVE HUMIDITY OUTPUT VOLTAGE VDC 5 0 25 55 2 75 10 0 50 60 3 00 15 0 75 65 3 25 20 1 00 70 3 50 25 1 25 75 3 75 30 1 50 80 4 00 35 1 75 85 4 25 40 2 00 90 4 50 45 2 25 95 4 75 50 2 50 100 5 00 Table 48 DISCHARGE THERMISTOR TEMPERATURE RESISTANCE DEGREE C DEGREE F RESISTANCE KOHMS 40 0 40 0 2889 60 35 0 31 0 2087 22 30 0 22 0 1522 20 25 0 13 0 1121 44 20 0 4 0 834 72 15 0 5 0 627 ...

Page 198: ...mpressor The lockout can only be reset by cycling the 24VAC power OFF and ON Flash Code 3 Compressor Protector Trip This code indicates the demand signal from the Unit Controller is greater than 1 44VDC and there is no compressor current detected This could be due to the compressor being OFF on internal overload circuit breaker open or power disconnected to the compres sor contactor The Digital Co...

Page 199: ...l reset is required to restart the unit after the fault has been corrected SYSTEM LOCKOUT One of the compres sor systems or other component is shutdown and locked out A manual reset is required to restart the system after the fault has been corrected UNIT AUTO RESET The complete unit is shut down but the unit restarts automatically when the fault condition is cleared SYSTEM AUTO RESET One of the c...

Page 200: ...ered the screen shows the first active warning If there are no active warnings present the first fault is displayed If there are no faults in the HISTORY buf fer the screen displays NO FAULT See SECTION 6 USER INTERFACE CONTROL CENTER of this manual for additional information on how to navigate through the HISTORY menu In addition to the items listed in Table 53 on page 209 the following items lis...

Page 201: ...1 J31 7 J31 J31 1 J29 J16 J17 7 J17 J17 1 J30 7 J30 J30 1 J15 15 J15 J23 J13 10 J13 J13 1 J15 1 J22 J9 14 J9 J9 1 J21 J10 J10 12 J10 1 J11 9 J11 J11 1 J8 J6 J7 1 2 3 4 5 6 8 7 6 5 12 11 10 9 4 3 2 1 J16 J21 J22 J23 J29 J6 J7 78 Note All the connectors are not present on all units Figure 82 CONTROL BOARD I O LOCATIONS LD13324 ...

Page 202: ...US2 186 WHT Comp Safety Chain Sys D 24VAC J22 4 BI STATUS2 188 RED Comp Safety Chain Sys D Comm J22 6 BI STATUS2 191 BLK Comp Safety Chain Sys D Input J22 5 BI STATUS2 190 WHT Comp Safety Chain Sys E 24VAC J23 1 BI STATUS3 246 Comp Safety Chain Sys E Comm J23 3 BI STATUS3 248 Comp Safety Chain Sys E Input J23 2 BI STATUS3 249 Comp Safety Chain Sys F 24VAC J23 4 BI STATUS3 250 Comp Safety Chain Sys...

Page 203: ...p Sensor J9 9 AI TEMP5 108 RED Flex Evap Temp Sensor J9 10 AI TEMP5 109 WNT Isolation Damper CTB1 11 BO PUMP ISO DMP FIELD Isolation Damper CTB1 12 BO PUMP ISO DMP FIELD Heat Output Common J31 5 BO HEAT1 215 BLK HW Steam Freezestat J13 5 BI SW1 118 RED HW Steam Freezestat J13 6 BI SW1 119 WHT HW Steam Valve Act Common J15 6 AO ACU2 201 BLK HW Steam Valve Act VDC J15 5 AO ACU2 200 WHT HW Steam Valv...

Page 204: ...0 344 Suct Press Sys E Input J8 2 AI P10 343 Suct Press Sys E 5VDC J8 12 AI P12 351 Suct Press Sys E Common J8 8 AI P12 350 Suct Press Sys E Input J8 4 AI P12 349 Supply Air Temp Sensor J9 1 AI TEMP1 100 RED Supply Air Temp Sensor J9 2 AI TEMP1 101 WHT Supply Fan Common J17 7 BO FAN1 225 BLK Supply Fan Bypass 24VAC J17 6 BO FAN1 223 RED Supply Fan Contactor 24VAC J17 5 BO FAN1 220 RED Supply Fan R...

Page 205: ...Duct Pressure 2 The optional duct static high pres sure switch is open for 5 seconds and re closes before 60 seconds and this is the second trip in a 60 minute time frame Auto Reset Duct high static switch is ENABLED Wrn Low Water Flow The optional water flow switch input is open for 5 seconds and the UNIT MODE is OCCUPIED or UNOCCU PIED COOLING Auto Reset Water flow switch is ENABLED Compressor S...

Page 206: ...y trip Alarm Auto Reset MSAT Sensor MS supply air temp current sensor is out of range for greater than or equal to 10 seconds Auto Reset UNIT TYPE is FLEXSYS Alarm Auto Reset Power Fail Power is lost when the unit operating state is RUN Auto Reset Auto Reset RAT Sensor Return air temp current sensor is out of range for greater than or equal to 10 seconds Auto Reset Alarm Auto Reset Re mote I O Com...

Page 207: ...ugh the shut down switch on the unit or by an exter nal hardwired or communicated input Unit Lockout Unit Overall Status Local Stop Lockout Sat Sensor Supply air temp current sensor is out of range for greater than or equal to 10 seconds Unit Lockout UNIT TYPE is CONSTANT VOLUME or VARIABLE AIR VOLUME Alarm Lockout Supply Fan Supply fan proving switch failed to close within 120 seconds of supply f...

Page 208: ...le the data for January 11 2005 would be stored in a root directory identified by Rm200501 the year followed by the month The subdirectory for this day would be identified as 20050111 csv the year followed by the month followed by the day Each of these files con tains all the data monitored for the day specified by the file name All connected Analog Inputs Analog Outputs Digital Inputs Digital Out...

Page 209: ...22 Invalid argument 23 Too many open files in system 27 File too large 28 No space left on device 29 Illegal seek 30 Read only file system 60 File name too long Table 53 DATA LOG ERROR STATE DATA LOG ERROR STATE AN ERROR OCCURRED WHEN DOING THIS 1 Mounting the flash card 2 Opening the root directory 3 Reading the root directory 4 Closing the root directory 5 Opening a sub directory 6 Reading a sub...

Page 210: ... 2019 Johnson Controls 100 JCI Way York Pennsylvania USA 17406 8469 www johnsoncontrols com Subject to change without notice Form 145 05 NOM7 1019 Supersedes 145 05 NOM7 818 All rights reserved ...

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