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36

System Operation (Continued)

Condenser Fan Sequencing Control

The condenser fans are cycled according to the outdoor air
temperature and the number of cooling steps that are operat-
ing. Table 16 lists the temperatures at which the A and B
Condenser Fan Outputs on the RTRM switches the fans
"Off". The fans are switched back "ON" when the outdoor
temperature rises approximately 5° F above the "Off" tem-
perature.

Figure 12 shows the condenser fans as viewed from the top
of the unit facing the control panel. Whenever a condenser
fan is cycled back "On", the condenser fan Outputs A and B
and the compressor steps are de-energized for approxi-
mately 7 seconds to prevent problems with fan windmill.

Table 16

Condenser Fan/Compressor Sequence

Unit Size C om pressor Staging Sequence (N ote 1 C ondenser Fan Output O/A Tem perature (

o

F)

(Tons)

Step 1

Step2

Step 3

Output A

Output B

Fans "Off"

C PR 1*

Fan #2

70

27.5 - 30

Fan #3

90

C PR 1, 2

N/A

Fan #2

-10

Fan #3

60

C PR 1*

Fan #2

65

35

Fan #3

85

C PR 1, 2

N/A

Fan #2

-20

Fan #3

55

C PR 1 **

Fan #2

50

Fan #3, 4

70

40

C PR 2, 3***

Fan #2

20

Fan #3, 4

60

C PR 1, 2, 3

Fan #2

-30

Fan #3, 4

50

C PR 1**

Fan #2

20

Fan #3, 4

60

50

C PR 2, 3***

Fan #2

-10

Fan #3, 4

55

C PR 1, 2, 3

Fan #2

-30

Fan #3, 4

-30

Figure 12

Condenser Fan Location

Note:

1. The Compressor(s) listed under each step are the operating compressors. On 27.5 to 35 ton units
with Lead/Lag, CPR1 will alternate but the fan sequence will remain the same. On 40 and 50 ton units
with Lead/Lag, the compressor(s) in step 2 & 3 will alternate and the fan sequence listed for that step
will be in operation.
2. Conventional thermostat sequence: Y1=CPR1, Y2=CPR2 (40 & 50 CPR 2,3), Y1 + Y2 = CPR1,2 (40 & 50

CPR 1,2,3)

* - Single circuit, manifolded compressors pair.
** - First Stage, Number one refrigeration circuit, Stand alone compressor is “On”.
***- First Stage is “Off”, Number two refrigeration circuit, manifolded compressor pair is “On” operating simulta-

neously.

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Содержание Voyager RT-SVX17C-EN

Страница 1: ...50 Ton 60 Hz Commercial 23 to 42 Ton 50 Hz CV or VAV Rooftop Air Conditioners with ReliaTel Controls Installation RT SVX17C EN Operation Maintenance Library Service Literature Product Section Unitary Product Rooftop Air Conditioning 27 50 Tons Model TE TC YC Literature Type Installation Operation Maintenance Sequence 17C Date March 2006 File No SV UN RT SVX17C EN 0306 Supersedes RT SVX17C EN 05 05...

Страница 2: ...nal Thermostat Connections 30 Economizer Operation with a Coventional Thermostat 30 LCI LonTalk Communication Interface 30 TCI Trane Communication Interface Optional 30 System Operation ReliaTel Control Features 31 Economizer Operation with CV Controls 31 Mechanical Cooling without an Economizer 32 Zone Temperature Occupied Cooling 32 Zone Temperature Occupied Heating 32 Supply Fan 32 Supply Air T...

Страница 3: ... Settings 66 ECA Test Procedure 66 VFD Testing 68 System Troubleshooting Chart 69 Component Failure Mode 73 VFD Programming Parameters 75 Warranty Information 77 UV Lights 77 Heater Start Up Gas Heat Units 54 Electric Heat Units 54 Final Unit Checkout For Constant Volume Units 54 For Variable Air Volume Units 54 Mechanical Cooling Sequence Of Operation Units without an Economizer 55 Units with An ...

Страница 4: ...learances for Unit Installation 13 Table 2 Slope Allowances 14 Table 3 Unit Weights and Point Loading Weights 15 Table 4 Optional Component Weights 15 Table 5 Sizing Natural Gas Pipe Mains Branches 18 Table 5 1 Specific Gravity Multipliers Table 6 27 5 50 Ton Electrical Service Sizing Data 20 Table 7 AC Conductors 23 Table 8 DC Conductors 23 Table 9 1 RTRM Zone Sensor Thermostat Connections 25 Tab...

Страница 5: ...3 3 Tons 2 10 HP STD Efficiency A Service Valves See Note 4 600 50 Tons 500 41 7 Tons 3 15 HP STD Efficiency B Through the Base Electrical Access 4 20 HP STD Efficiency C Non Fused Disconnect Switch 7 Major Development Sequence 5 7 5 HP High Efficiency with External Handle A First 6 10 HP High Efficiency D Factory Powered 15Amp GFI Convenience 7 15 HP High Efficiency Outlet and a Non Fused Disconn...

Страница 6: ...sign sequence RT SVN17C EN October 2004 Revised issue Supply fan proving switch change Provides specific installation operational and maintenance instruc tions for TC_ TE_ and YC_ units with P and later design sequence RT SVN17B EN July 2004 Revised issue alternate supply fan and belt supplier added Provides specific installation operational and maintenance instructions for TC_ TE_ and YC_ units w...

Страница 7: ...n As soon as the unit arrives at the job site Verify that the nameplate data corresponds to the sales order and bill of lading including electrical data Visually inspect the exterior of the unit including the roof for physical signs of shipping damage Check for material shortages Figure 2 illustrates where ship with items are placed inside the unit If the job site inspection reveals damage or mate...

Страница 8: ...8 Figure 1 Unit Dimensions for TC_ TE_ and YC_330 360 and 420 MBH Units Low Heat ...

Страница 9: ...9 Figure 1 continued Unit Dimensions for YC_330 360 and 420 MBH Units High Heat ...

Страница 10: ...10 Figure 1 continued Unit Dimensions for TC_ TE_ and YC_480 and 600 MBH Units Low High Heat ...

Страница 11: ...11 Figure 1 continued Fresh Air and Power Exhaust Hood Dimensions for TC_ TE_ and YC_ Units Figure 2 Location of Shipwith Items for TC_ TE_ and YC_ Units ...

Страница 12: ...nts Electrical Requirements See page 20 Field Installed Electrical Power Wiring Verify that the electrical power supply characteristics comply with the unit nameplate specifications Inspect all control panel components tighten any loose connections Connect properly sized and protected power supply wir ing to a field supplied installed disconnect and unit power terminal block HTB1 or to the optiona...

Страница 13: ...for the supply and return duct penetration Do Not remove the roof decking from the inside perimeter of the curb If a Trane curb accessory kit is not used a The ductwork can be attached directly to the S A and R A openings Be sure to use a flexible duct connector at the unit b For built up curbs supplied by others gaskets must be installed around the curb perimeter flange S A opening and R A openin...

Страница 14: ...curb and the unit weight WARNING Heavy Objects Do not use cables chains or slings except as shown Each of the cables chains or slings used to lift the unit must be capable of supporting the entire weight of the unit Lifting cables chains or slings may not be of the same length Adjust as necessary for even unit lift Other lifting arrangements may cause equipment or property only damage Failure to p...

Страница 15: ...Hi Static Factory Roof Hi Eff 0 25 Inlet Thru the Non Fused GFI with Curb Unit Barometric Power Supply Fan Manual Guide Service Base Disconnect Disconnect Weights Model Relief Exhaust Motors 2 Damper Econo Vanes Valves Electric Switch Switch Lo Hi D330 110 165 120 50 260 55 11 6 30 85 310 330 H330 145 200 120 50 285 55 11 6 30 85 310 330 D360 110 165 120 50 260 55 11 6 30 85 310 330 H360 145 200 1...

Страница 16: ... transducer and the outside air sensor is used to control the discharge duct static pressure to within a customer specified controlband Refer to the illustration in Figure 6 and the following steps to install the sensor and the pneumatic tubing 1 Remove the O A pressure sensor kit located inside the fan section The kit contains the following items an O A static pressure sensor a sensor mounting br...

Страница 17: ... Once the unit is set into place a gas supply line must be field installed and connected to the gas train located inside the gas heat compartment WARNING Hazardous Gases and Flammable Vapors Exposure to hazardous gases from fuel substances have been shown to cause cancer birth defects or other reproductive harm Improper installation adjustment al teration service or use of this product could cause...

Страница 18: ...rmining the actual pipe size 70 370 560 1050 1700 3000 6200 80 350 530 990 1600 2800 5800 Example A 40 pipe run is needed to 90 320 490 930 1500 2600 5400 connect a unit with a 500 MBH furnace to a 100 305 460 870 1400 2500 5100 natural gas supply having a rating of 1 000 125 275 410 780 1250 2200 4500 BTU Cu Ft and a specific gravity of 0 60 150 250 380 710 1130 2000 4100 175 225 350 650 1050 185...

Страница 19: ...e rated voltage stamped on the nameplate Use only copper conductors to connect the 3 phase power supply to the unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may re sult in equipment damage Main Power Wiring 1 Table 6 lists the electrical data The electrical service must be protected from over current and...

Страница 20: ...eration at 208 240 480 and 600 v Nominal Nominal Unit Size Unit Heater KW Tons Voltage 36 54 72 90 108 27 5 30 35 208 74 9 112 4 n a n a n a 230 86 6 129 9 n a n a n a 460 43 3 65 86 6 108 3 n a 575 n a 52 69 3 86 6 n a 40 50 208 n a 112 4 n a n a n a 230 n a 129 9 n a n a n a 460 n a 65 86 6 108 3 129 9 575 n a 52 69 3 86 6 103 9 Note Heater KW 1 732 X Applied Voltage X Amps ...

Страница 21: ... 10 1 208 60 3 187 229 2 15 62 8 409 7 5 22 3 21 5 3 1 1 7 1 6 7 10 29 7 29 0 15 44 4 41 5 TC TE 230 60 3 207 253 62 8 376 7 5 19 6 18 8 7 6 7 YC 420 10 26 4 25 2 15 38 6 36 0 460 60 3 414 506 27 3 178 7 5 9 8 9 4 3 5 2 9 10 13 2 12 6 15 19 3 18 0 575 60 3 517 633 21 8 143 7 5 7 8 7 5 2 8 2 3 10 10 3 10 1 15 15 4 14 5 208 60 3 187 229 3 14 14 10 62 8 62 8 41 9 409 409 269 10 29 7 29 0 4 1 1 7 1 6 ...

Страница 22: ...P and or RDE values as if the unit is operating in the heating mode as follows Note When determining loads the compressors and condenser fan motors do not operate during the heating cycle Units with less than 50 KW Heaters MCA 1 25 x Load 1 Load 2 Load 4 1 25 x Load 3 Units with 50 KW or Larger Heaters MCA 1 25 x Load 1 Load 2 Load 4 Load 3 The MCA value stamped on the nameplate is the largest of ...

Страница 23: ...sure that the AC control voltage wiring between the controls and the unit s termination point does not exceed three 3 ohms conductor for the length of the run Note Resistance in excess of 3 ohms per conductor may cause component failure due to insufficient AC voltage supply c Refer to Figure 2 for the electrical access locations provided on the unit Table 7 AC Conductors Distance from Unit Recomme...

Страница 24: ...24 Figure 10 Typical FieldWiring Requirements for CV Control Options ...

Страница 25: ...on the type of sensor and or re mote panel selected to interface with the RTRM The possi bilities are Fan selection ON or AUTO System selection HEAT COOL AUTO and OFF Refer to Figure 9 1 for con ventional thermostat connections ZSM INPUTS CV VAV CV ONLY ZSM INPUTS INPUTS Table 9 1 RTRM Zone Sensor Thermostat Connections Remote Panels and Sensors The following Constant Volume controls are available...

Страница 26: ...ahrenheit The options menu is used to enable or disable applicable functions i e Morning warm up economizer minimum posi tion override during unoccupied status Fahrenheit or centi grade supply air tempering remote zone temperature sen sor 12 24 hour time display smart fan and computed re covery During an occupied period an auxiliary relay rated for 1 25 amps 30 volts AC with one set of single pole...

Страница 27: ...s selection of Occupied Unoccupied periods with two temperature inputs Cooling Supply Air Temperature and Heating Warm up temperature per occu pied period The occupied supply air cooling setpoint ranges between 40o and 80o Fahrenheit The warm up setpoint ranges between 50 and 90 degrees Fahrenheit with a 2 degrees deadband The Unoccupied cooling setpoint ranges between 45 and 98 degrees Fahrenheit...

Страница 28: ...he specific Re mote Panel for wiring details CUT RESISTOR R69 LOCATED ON RTAM NEAR SUPPLY AIR COOLING SETPOINT POTENTIOMETER WHEN OPTIONAL REMOTE PANEL IS USED See Figure 11 CUT WIRE JUMPER ADJACENT TO THE TERMINAL 1 ON ZONE SENSOR WHEN OPTIONAL REMOTE SENSOR IS USED 1 2 High Temperature Sensor BAYFRST003A Provides high limit shutdown of the unit The sensor is used to detect high temperatures due ...

Страница 29: ...emotely set the position of the econo mizer dampers from 0 to 50 of fresh air entering the space Table 10 Temperature versus Resistance temperature vs resistance coefficient is negative Space Temperature Averaging Space temperature averaging is accomplished by wiring a number of remote sensors in a series parallel circuit The fewest number of sensors required to accomplish space temperature averag...

Страница 30: ... On electric heat units only two stages of heat are available If the W2 terminal is activated without activating the W1 terminal the RTRM will bring on both stages of electric heat The Conventional Thermostat connections can also be uti lized as a generic building automation system interface for constant volume ICS applications Due to the limited heat ing and cooling steps when using a conventiona...

Страница 31: ... from continu ous fan to auto fan operation and CV Unit w Mechanical ZSM if the unit has a valid cooling and heating setpoint the setup setback is a minimum of 7 If the unit does not have both setpoints the setup setback is 0 If the unit has neither setpoint the unoccupied cooling heat ing setpoints will be 74 F 71 F This input is ignored if a conventional thermostat is used VAV unit w o ICS or NS...

Страница 32: ...empering is allowed with ICSTM when the fan system switch is in the ON posi tion with no call for heating If the supply air temperature falls 10 degrees F below the heating setpoint the next available stage of heat will be turned on It will remain on until the supply air temperature reaches 10 degrees above the heating setpoint While economizing if the supply air temperature falls below 50o F the ...

Страница 33: ...g will be turned On if available Then if the supply air temperature is more than 3 5 degrees cooler than the selected tempera ture a stage of cooling will be turned Off At very low air flows minimum of approximately 20 of design the unit may cycle stages On and Off to maintain an average dis charge air temperature outside the 7 degree deadband The amount of the supply air temperature swing during ...

Страница 34: ...remote panel with night setback or ICS the necessary stages of heat will cycle to maintain the zone temperature to System Operation Continued within the unoccupied setpoint deadband For VAV systems the IGV s or VFD s will operate at 100 during this mode It will be necessary to drive VAV boxes to their maximum posi tion through ICS programming or the factory provided VHR relay Mechanical Cooling wi...

Страница 35: ...ers is at least 0 5 w c The contacts will automatically open when the pressure differential across the filters decreases to approximately 0 4 w c The clogged filter output is energized when the supply fan is op erating and the clogged filter switch has been closed for at least 2 minutes The system will continue to operate regard less of the status of the filter switch Ventilation Override Applying...

Страница 36: ...ns Step 1 Step2 Step 3 Output A Output B Fans Off CPR 1 Fan 2 70 27 5 30 Fan 3 90 CPR 1 2 N A Fan 2 10 Fan 3 60 CPR 1 Fan 2 65 35 Fan 3 85 CPR 1 2 N A Fan 2 20 Fan 3 55 CPR 1 Fan 2 50 Fan 3 4 70 40 CPR 2 3 Fan 2 20 Fan 3 4 60 CPR 1 2 3 Fan 2 30 Fan 3 4 50 CPR 1 Fan 2 20 Fan 3 4 60 50 CPR 2 3 Fan 2 10 Fan 3 4 55 CPR 1 2 3 Fan 2 30 Fan 3 4 30 Figure 12 Condenser Fan Location Note 1 The Compressor s ...

Страница 37: ... power company to correct this situation before operating the unit Be sure to complete all of the procedures described in this section before starting the unit for the first time Preparing the Unit for Operation Use the checklist provided below in conjunction with the In stallation Checklist to ensure that the unit is properly in stalled and ready for operation WARNING Hazardous Voltage Disconnect...

Страница 38: ...until all calibration start up functions have been completed Otherwise the economizer actuator and power exhaust output may not function properly during any of the test mode steps Allow 2 minutes after unit power up to com plete economizer calibration before entering the test mode function Use the following Test procedure to bypass some time de lays and to start the unit at the control panel Each ...

Страница 39: ...OOL MINIMUM Note5 Note 4 5 STAGE 2 ON POSITION OFF ON OFF OFF 15K 5 COOL MINIMUM Note 4 Note 4 STAGE 3 ON POSITION ON ON OFF OFF 22K 6 HEAT STAGE 1 ON CLOSED OFF OFF ON OFF 33K 7 HEAT STAGE 2 ON CLOSED OFF OFF ON ON 47K 8 RESET Notes 1 The IGV VFD will be controlled to the supply pressure setpoint unless test mode has been running for 6 minutes or longer After 6 minutes the IGV damper will drive t...

Страница 40: ...l load amp FLA rating stamped on the motor nameplate IGV s With the O A dampers fully closed measure the amperage at the supply fan contactor and compare it with the full load amp FLA rating stamped on the motor nameplate VFD s With the O A dampers fully closed read the amperage displayed on the VFD screen and compare it to the motor nameplate Note On VAV applications IGV s will be under control o...

Страница 41: ...M 450 RPM 400 RPM 350 RPM 300 RPM Volumetric Airflow Rate CFM Supply Fan Performance 40 and 50 Ton Static Presure InWC 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000 26000 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 Supply Fan Performance 27 35T 90 W OCFM 80 W O CFM 7 0 W O C F M 6 0 W O C F M 5 0 W O C F M 1 5 H P 1 0 H P 7 5 H P 5 H P 3 H P 800 RPM 700 RPM 600 RPM 500 RPM 400 RPM ...

Страница 42: ...0 0 111 12000 0 073 13000 0 087 12500 0 08 Unit Airflow Pressure Unit Airflow Pressure Capacity Cfm Drop 2 Capacity Cfm Drop 2 Note 12000 0 072 15000 0 098 1 Static Pressure Drops for the 12500 0 075 15500 0 104 return air damper must be added 13000 0 079 16000 0 11 to the system external static 13500 0 083 16500 0 117 pressure as an accessory when 14000 0 087 17000 0 124 using the fan performance...

Страница 43: ... 12000 0 01 0 03 0 08 0 13 0 0 09 0 07 0 04 13000 0 01 0 04 0 10 0 15 0 0 11 0 08 0 05 14000 0 02 0 05 0 11 0 18 0 0 12 0 09 0 05 40 15000 0 02 0 05 0 13 0 20 0 0 14 0 10 0 06 16000 0 02 0 06 0 15 0 23 0 0 16 0 12 0 07 17000 0 02 0 07 0 17 0 26 0 0 18 0 13 0 08 15000 0 02 0 05 0 13 0 20 0 12 0 14 0 10 0 06 16000 0 02 0 06 0 15 0 23 0 13 0 16 0 12 0 07 50 17000 0 02 0 07 0 17 0 26 0 15 0 18 0 13 0 ...

Страница 44: ... BHP RPM BHP RPM BHP 12000 365 3 02 408 3 66 448 4 32 485 4 99 522 5 70 556 6 44 588 7 20 620 7 96 652 8 75 682 9 56 13000 388 3 73 427 4 40 468 5 13 501 5 84 536 6 57 569 7 34 601 8 15 631 8 96 660 9 80 690 10 66 14000 412 4 54 448 5 26 486 6 03 520 6 80 551 7 57 584 8 36 615 9 21 643 10 06 672 10 96 699 11 86 15000 436 5 46 471 6 25 505 7 04 540 7 89 569 8 70 599 9 54 629 10 40 658 11 31 685 12 ...

Страница 45: ...Med Speed 2 Low Speed 2 Airflow Cfm 1 ESP ESP ESP 3500 0 900 4000 0 860 4500 0 820 5000 0 780 0 400 5500 0 745 0 380 6000 0 700 0 360 6500 0 660 0 330 7000 0 610 0 400 0 300 7500 0 560 0 365 0 260 8000 0 505 0 330 0 215 8500 0 445 0 300 0 170 9000 0 385 0 255 0 120 9500 0 320 0 210 0 070 10000 0 255 0 165 0 020 10500 0 190 0 125 11000 0 125 0 060 11500 0 065 0 000 12000 0 005 Notes 1 Performance i...

Страница 46: ...E F G G 13500 A A C E F F G 40 Thru 50 Ton Downflow Units 14000 A A C D E F G Economizer O A Damper Static Pressure Setup 14500 A A B D E F F System Return Air Duct Static Return Air Damper Static Design Inches of Water 40 Thru 50 Ton Horizontal Units CFM 0 20 0 40 0 60 0 80 1 00 1 20 1 40 Economizer O A Damper Static Pressure Setup Drive Rod Position System Return Air Duct Static Return Air Dampe...

Страница 47: ...oot ing of this product it may be necessary to measure the speed of rotating components Have a qualified or li censed service individual who has been properly trained in handling exposed rotating components perform these tasks Failure to follow all safety precautions when exposed to rotating components could result in death or serious injury 6 Using the Service Test guide in Figure 13 momentarily ...

Страница 48: ...subcooling guidelines refer to Checking Subcooling at the end of this section Note Do Not release refrigerant to the atmosphere If adding or removing refrigerant is required the service technician must comply with all federal state and local laws Refer to general service bulletin MSCU SB 1 latest edition Starting 40 and 50 Ton units install a set of service gauges onto the suction and discharge se...

Страница 49: ...nt 75 F OD Ambient 65 F OD Ambient 55 F OD Ambient 68 57 F ID DB WB 74 62 F ID DB WB 80 67 F ID DB WB 86 72 F IN DB WB TC TE YC 360 FULL LOAD 150 200 250 300 350 400 450 500 55 60 65 70 75 80 85 90 95 100 105 SUCTION PRESSURE PSIG DISCHARGE PRESSURE PSIG 115 F OD Ambient 105 F OD Ambient 95 F OD Ambient 85 F OD Ambient 75 F OD Ambient 65 F OD Ambient 55 F OD Ambient 68 57 F ID DB WB 74 62 F ID DB ...

Страница 50: ...200 250 300 350 400 450 500 55 60 65 70 75 80 85 90 95 100 105 SUCTION PRESSURE PSIG DISCHARGE PRESSURE PSIG 115 F OD Ambient 105 F OD Ambient 95 F OD Ambient 85 F OD Ambient 75 F OD Ambient 65 F OD Ambient 55 F OD Ambient 68 57 F ID DB WB 74 62 F ID DB WB 80 67 F ID DB WB 86 72 F IN DB WB ...

Страница 51: ...7 F ID DB WB 115 F OD Ambient 105 F OD Ambient 95 F OD Ambient 85 F OD Ambient 75 F OD Ambient 65 F OD Ambient 55 F OD Ambient TC TE YC 480 Circuit 2 FULL LOAD 150 200 250 300 350 400 450 500 55 60 65 70 75 80 85 90 95 100 105 SUCTION PRESSURE PSIG DISCHARGE PRESSURE PS 86 72 F ID DB WB 80 67 F ID DB WB 74 62 F ID DB WB 68 57 F ID DB WB 115 F OD Ambient 105 F OD Ambient 95 F OD Ambient 85 F OD Amb...

Страница 52: ...7 F ID DB WB 115 F OD Ambient 105 F OD Ambient 95 F OD Ambient 85 F OD Ambient 75 F OD Ambient 65 F OD Ambient 55 F OD Ambient TC TE YC 600 Circuit 2 FULL LOAD 150 200 250 300 350 400 450 500 550 60 65 70 75 80 85 90 95 100 105 110 SUCTION PRESSURE PSIG DISCHARGE PRESSURE PS 86 72 F ID DB WB 80 67 F ID DB WB 74 62 F ID DB WB 68 57 F ID DB WB 115 F OD Ambient 105 F OD Ambient 95 F OD Ambient 85 F O...

Страница 53: ...tain an elevated compressor oil tempera ture during the Off cycle to reduce oil foaming during com pressor starts When the compressor starts the sudden reduction in crank case pressure causes the liquid refrigerant to boil rapidly causing the oil to foam This condition could damage com pressor bearings due to reduced lubrication and could cause compressor mechanical failures When power has been Of...

Страница 54: ...ifold gas pressure The manifold pressure must be set at a negative 0 2 w c 0 05 w c CAUTION Hot Surfaces Surface temperatures may exceed 300 F 150 C on con densing unit and carbon tank Contact of bare skin on hot surfaces may result in minor to severe burns Jump the test terminals momentarily to initiate second stage heat operation The combustion blower motor should go to high speed and the manifo...

Страница 55: ...ting dampers The ECA modulates the economizer dampers from minimum position to full open based on a 1 5 F control point below either the space tem perature setpoint for constant volume applications or 1 5 F around the supply air temperature setpoint for variable air volume applications If the Mixed Supply Air Sensor MAS senses that supply air temperature is too cold the dampers are held in their c...

Страница 56: ...tor CBM to high speed delivering second stage heat capacity ConstantVolume CV unit fan operation If the Fan selection switch is in the AUTO position for con stant volume units the RTRM will delay starting the supply fan for 30 seconds to allow the heat exchanger to warm up When the zone temperature rises above the heating setpoint the IGN control module will terminate the heat cycle The supply fan...

Страница 57: ... the force reading is outside of the listed range for the type of belts used ei ther readjust the belt tension or contact a qualified ser vice representative Figure 16 Typical Belt Tension Gauge Note The actual belt deflection force must not exceed the maximum value shown in Figure 17 7 Recheck the new belt s tension at least twice during the first 2 to 3 days of operation Readjust the belt tensio...

Страница 58: ...600 BK160 X 1 7 16 BK160 1 7 16 BK57H BK57H H 1 3 8 H 1 3 8 BX100 Notched 10 hp 650 BK190 X 1 7 16 BK190 1 7 16 BK75H BK75H H 1 3 8 H 1 3 8 BX108 Notched 700 BK160 X 1 7 16 BK160 1 7 16 BK67H BK67H H 1 3 8 H 1 3 8 BX103 Notched 15 hp 2 790 BK160 X 1 7 16 BK160 1 7 16 1B5V68 1B68SDS B 1 5 8 SDS 1 5 8 BX103 Notched 800 BK160 X 1 7 16 BK160 1 7 16 1B5V70 1B70SDS B 1 5 8 SDS 1 5 8 BX103 Notched 40 Ton...

Страница 59: ...lubricate After greasing the bearings check the setscrews to ensure that the shaft is held securely Make sure that all bearing braces are tight Check the supply fan belt s If the belts are frayed or worn replace them Check the condition of the gasket around the control panel doors These gaskets must fit correctly and be in good condition to prevent water leakage Verify that all terminal connection...

Страница 60: ... as possible to avoid dam aging the coils Generally inspect the unit for unusual conditions e g loose access panels leaking piping connections etc Make sure that all retaining screws are reinstalled in the unit access panels once these checks are complete With the unit running check and record the ambient temperature compressor oil level each circuit compressor suction and discharge pressures each...

Страница 61: ...ains oil and refrigerant under high pressure Recover refrigerant to relieve pressure before opening the system See unit nameplate for refrigerant type Do not use non approved refrigerants refrigerant substi tutes or refrigerant additives Failure to follow proper procedures or the use of non approved refrigerants refrigerant substitutes or refrig erant additives could result in death or serious inj...

Страница 62: ...er Sub Temp Oil Press Press Press heat cool Oil Press Press Press heat cool Date F Level Psig Psig Psig F F Level Psig Psig Psig F F ok ok low low ok ok low low ok ok low low ok ok low low ok ok low low ok ok low low ok ok low low ok ok low low ok ok low low ok ok low low Note Check and record the data requested above each month during the cooling season with the unit running ...

Страница 63: ...ations for each mode to assist in verifying proper operation Make the necessary repairs and proceed to Steps 7 and 8 7 If no abnormal operating conditions appear in the test mode exit the test mode by turning the power Off at the main power disconnect switch 8 Refer to the individual component test procedures if other microelectronic components are suspect System Status Diagnostics System status a...

Страница 64: ... to chassis ground 24 VAC should be present whenever the Emergency Stop input is closed 2 Outdoor air sensor OAS input is open shorted or has failed Diagnostics VAV only If only one diagnostic is present refer to that diagnostic If more than one diagnostic is present refer to combination diagnostics such as COOL HEAT as appropriate On a BAYSENS020 the display will show HEAT FAIL or COOL FAIL or SE...

Страница 65: ...l I D J6 1 ZTEMP J6 6 LED COMMON J6 2 SIGNAL COMMON J6 7 HEAT LED J6 3 CSP J6 8 COOL LED J6 4 MODE J6 9 SYS ON LED J6 5 HSP J6 10 SERVICE LED Test 1 Zone Temperature Thermistor ZTEMP This component is tested by measuring the resistance be tween terminals 1 and 2 on the Zone Temperature Sensor Below are some typical indoor temperatures and corre sponding resistive values Zone or Set Point Nominal Z...

Страница 66: ...g the unit through all of the steps in the Test Modes section discussed in Unit Start Up 5 After verifying proper unit operation exit the test mode Turn the fan on continuously at the ZSM by pressing the button with the fan symbol If the fan comes on and runs continuously the ZSM is good If you are not able to turn the fan on the ZSM is defective Rooftop Refrigerator Module RTRM Default Chart CV U...

Страница 67: ...ampere Replace the sensor if it is out of range Note Both the RHS and the OHS are polarity sensitive Verify that the polarity is correct before condemning the sensor Incorrect wiring will not damage any of the controls but they will not function if wired incorrectly ReliaTel Air Module RTAM Test Test 1 Testing the Inlet Guide Vane Variable Frequency Drive IGV VFD Output 1 Using the Test Mode proce...

Страница 68: ... VFD and the Keypad cable 2 Using the Step Test Mode procedure described in the Unit Start Up section Step 3 for VAV Verify that the fan starts and the speed increases until the SA Pressure reaches the Setpoint on VAV Setpoint panel If the fan does not start check for Fault Conditions on the VFD Keypad 3 If no Fault Conditions exist and the fan started but did not ramp up to speed verify the speed...

Страница 69: ... Chart but will not control to set point 2 Thermometer on the ZSM 2 Check and calibrate the thermometer out of calibration D CPR1 will not operate 1 Compressor failure 1 Test compressor mechanically and electrically Replace if necess ODM s will operate 2 Wiring terminal or 2 Check wires terminals and CC1 Repair or replace if necessary mechanical CC1 contactor failure 3 LPC1 has tripped 3 Leak chec...

Страница 70: ... Wiring terminal 2 Check wiring terminals and F contactor Repair or replace wiring or contactor failure terminals or fan contactor F 3 ZSM is defective 3 Place unit in test mode If the fan operates in the test mode test the ZSM using the appropriate test procedures 4 RTRM is defective 4 Check the RTRM fan output Locate P2 1 on the RTRM Measure voltage to ground If 24 VAC is not present on a call f...

Страница 71: ... AH BH CH and DH contactor coils If 24 VAC is Electric heat will failed present on a call for heat and the contacts do not close the contactor not operate has failed 2 Heater element 2 Check line voltage between the element temperature limit terminals temperature limit s is located in heat section If line voltage is present the limit is open open Repair heating unit or replace limit s as needed 3 ...

Страница 72: ...he actuator Check for resistance between P23 1 and P23 2 refer to the Resistance versus Temperature Chart Replace sensor if necessary T Economizer modulates 1 Comparative enthalpy setup 1 Check the return air sensor RAS at connector P10 by disconnecting but system does not RAS or RHS failed P10 from RAT on the ECA seem to operate as System is operating using Check for resistance between P10 1 and ...

Страница 73: ... below 60 F DB Honeywell measuring current draw C7600A ECA 3 flashes RHS Return Humidity 1 Economizer operates 4 to 20 mA Check at ECA Sensor using Referance 10 to 90 RH RAH 1 and RAH 2 by Enthalpy Honeywell measuring current draw C7600A Remote 1 Economizer modulates potentiometer range NONE Check resistance Minimum position but minimum position 50 to 200 at ECA P and P1 Potentiometer stays at zer...

Страница 74: ...s by unit at RTRM J6 8 to J 6 COOL LED blinks at ZSM CCB2 or CCB3 Compressor CPR2 or Normally Closed Cool Failure Output Compressor Overload CPR3 will not operate range varies by unit at RTRM J6 8 to J 6 COOL LED blinks at ZSM HPC1 High Pressure Compressor CPR1 Open 425 psig Cool Failure Output Control will not operate Close 325 psig at RTRM J6 8 to J 6 COOL LED blinks at ZSM HPC2 High Pressure Co...

Страница 75: ...the up or down arrow to scroll through parameter settings within a specified menu d Press the Change Data button to allow a parameter VFD Programming Parameters Units shipped with an optional variable frequency drive VFD are preset and run tested at the factory If a problem with a VFD occurs ensure that the programmed parameters listed in Table 25 have been set before replacing the drive Note Chec...

Страница 76: ...to scroll to the Copy to Setup 1 setting p Press the OK button q Press the Up Arrow button to scroll to the Active Setup menu r Press the Change Data button s Press the Up Arrow button to scroll to the Setup 1 setting t Press the OK button v Press the Change Data button w Press the Up Arrow button to scroll to the Down load All Parameters setting x Press the OK button Note Item 5 resets the drive ...

Страница 77: ...erefore for all Company products not conforming to this warranty and which have been returned to the manufacturer The Company shall not be obligated to pay for the cost of lost refrigerant No liability whatever shall attach to the Company until said products have been paid for and then said liability shall be limited to the purchase price of the equipment shown to be defective The Company makes ce...

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