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SCXF-SVX01B-EN

85

Adjusting Belt Tension
To adjust belt tension refer to Figure O-M-
5 on page 84 and perform the following
procedure:
1. Loosen bolts A, B, and E on both sides

of the sliding motor base. See Figure O-
M-6.

2. Loosen nuts C and D (as required for

motor horsepower) to slide the motor
on its mounting plate in the proper
direction to tension or relieve tension on
the belt.

3. Adjust nuts A-D and bolt E. Do not

stretch the belts over the sheaves.

4. Retighten all nuts and bolts.
5. Verify tension is adjusted properly.

Do not over-tension the belts.
Excessive tension will reduce fan
and motor bearing life, accelerate
belt wear, and possibly cause
shaft failure.

Recommended belt tension range values
are on the unit fan scroll. To access the
fan scroll, face the right-hand side of the
unit and remove the top left panel. The
belt tension label is on the top right-hand
corner of the fan scroll. See Figures O-M-
7 and O-M-8.

The correct operation tension for a V-belt
drive is the lowest tension at which the
belt will not slip under the peak load
conditions. It may be necessary to
increase the tension of some drives to
reduce flopping or excessive start-up
squealing.

Figure O-M-6. Belt tensioning with fan adjustment points.

Figure O-M-7. Location of fan belt label on
fan scroll.

Figure O-M-8. Right side view of the self-contained unit.

CAUTION

!

Owner

Maintenance

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Содержание IntelliPak Signature SCRF-020

Страница 1: ...f Contained Signature Series 20 80T on Models BO and later Design Sequence SCWF 020 022 025 029 032 035 038 042 046 052 058 065 072 080 SIWF 020 022 025 029 032 035 038 042 046 052 058 065 072 080 SCR...

Страница 2: ...tion systems CFM Cubic feet per minute CKT Circuit CV Constant volume CW Clockwise CCW Counterclockwise E A Exhaust air ECEM Exhaust comparative enthalpy CAUTION module F A Fresh air GBAS Generic buil...

Страница 3: ...on Bulletin Altivar 58 Adjustable Speed Drive Controllers Installation Guide Type H Controllers Keypad Display Installation General Information Pre installation Considerations Dimensions Weights Mecha...

Страница 4: ...and oil charge Air cooled units ship with oil and a dry nitrogen holding charge Therefore air cooled units require field piping refrigerant 2 inch flat filter boxinsideunit casing Watersideeconomizer...

Страница 5: ...ol modules UCM In this manual the acronym UCM refers to the entire control system network These modules perform specific unit functions using proportional integral control algorithms They are mounted...

Страница 6: ...tion A Vertical Discharge B Vertical Discharge with DoubleWall C Horizontal Discharge D Horizontal Discharge w Double Wall Digit 13 Flexible Horizontal Discharge PlenumType B Std 33 Plenum w Factory C...

Страница 7: ...Tracer Comm Interface Module TCI D Remote Human Interface RHI E GBAS and TCI F VOM and TCI G GBAS and VOM H GBAS and RHI J VOM and RHI K TCI and RHI L GBAS VOM and TCI M GBAS VOM and RHI N GBAS TCI a...

Страница 8: ...Motor 30 30 HP Motor 40 40 HP Motor 50 50 HP Motor 460V 575V Only 0 Not Defined Digit 15 Exhaust Comparative Enthalpy Module Field Installed 1 ECEM Kit 2 None Digit 16 Generic BAS Module 1 GBAS 0 5 V...

Страница 9: ...il Request an immediate joint Figure I PC 1 Typical unit mounted on shipping skid inspection of the damage by the carrier and consignee o Notify yourTrane representative of the damage and arrange for...

Страница 10: ...ted return 24 in 610 mm w VFD 7 5 to 20 HP 36 in 914 mm w VFD 25 to 50 HP Inlet 18 in 457 mm Provides uniform airflow Service Access See Figure I PC 2 for recommended service and code clearances Acces...

Страница 11: ...nnel Unit Handling Procedure 1 Position rigging sling under wood skid using spreader bars to avoid unit damage 2 Use a forklift with caution to prevent unit damage The fork length must be at least 68...

Страница 12: ...the unit if neccesary o Allow minimum recommended clearances for routine maintenance and service Refer to unit submittals for dimensions o Allow three fan diameters above the unit for the discharge d...

Страница 13: ...665 300 600 270 SCRF SIRF 20 2920 1325 430 195 140 65 340 155 460 210 25 3140 1425 500 225 190 85 390 175 460 210 29 3330 1510 500 225 190 85 390 175 460 210 30 3370 1530 500 225 280 130 505 230 460...

Страница 14: ...14 SCXF SVX01B EN Dimensions and Weights 20 38T on Self Contained English Inches ON PAGE 17 ON PAGE 17 ON PAGE 17 Installation...

Страница 15: ...SCXF SVX01B EN 15 ON PAGE 17 ON PAGE 17 ON PAGE 17 Dimensions and Weights Installation 20 38Ton Self Contained Metric mm...

Страница 16: ...16 SCXF SVX01B EN 42 80Ton Self Contained Dimensions and Weights Installation...

Страница 17: ...Connections Discharge Dimensions English inches UnitTons A B C D 20 38 Tons 30 3 8 26 1 8 21 1 4 25 3 4 40 80Tons 43 1 2 33 31 1 2 31 1 2 Discharge Dimensions Metric mm UnitTons A B C D 20 38 Tons 77...

Страница 18: ...80 72 7 8 105 1 4 18 13 1 4 3 22 1 8 6 3 8 5 3 8 4 3 8 1 1 4 Piping Locations For Steam Coils Metric mm A B C D E F G H J K L M N Unit Sizes 20 38 1534 2105 457 568 76 470 98 127 111 32 Unit Sizes 42...

Страница 19: ...3 8 21 1 8 119 7 8 390 lbs Unit Sizes 42 80 Std 80 3 8 28 5 8 119 7 8 540 lbs Ext 80 3 8 45 119 7 8 705 lbs Plenum Dimensions Metric mm A B C Weight Low 1648 625 2435 147 4 kg Unit Sizes 20 38 Std 16...

Страница 20: ...20 SCXF SVX01B EN Airside Economizer Dimensions and Weights Installation...

Страница 21: ...3 8 63 1 2 40 SXRF 57 3 8 86 1 2 13 1 4 104 3 8 8 7 8 94 1 8 63 1 2 28 1 8 26 6 7 8 15 26 24 3 4 20 3 8 63 1 2 46 SXWF 50 SXRF 57 3 8 86 1 2 13 1 4 104 3 8 8 7 8 96 5 8 63 1 2 52 37 1 2 1 7 8 9 1 4 3...

Страница 22: ...and three inches for the discharge duct Keep the material loose to absorb fan vibration Note The compressors and fan assembly are internally isolated Therefore external isolation devices spring mount...

Страница 23: ...in is internally trapped Condensate drain connections are on the unit s left side Connect condensate drain piping to the 1 1 4 NPT female fitting using at least 7 8 OD copper or 3 4 OD iron pipe Pitch...

Страница 24: ...nd the mechanical cooling function will lockout However the economizer if enabled will continue to function The compressors will reset when the entering water temperature reaches 58 F 15C Units with v...

Страница 25: ...n inert gas such as dry nitrogen through the tubing A nitrogen flow of 1 to 3 cubic feet per minute is sufficient to displace the air in the tubing and prevent oxidation of the interior surfaces Use a...

Страница 26: ...lance Read the voltage at the compressor terminals to determine if it is balanced Voltage imbalance on three phase systems can cause motor overheating and premature failure The maximum allowable imbal...

Страница 27: ...ion there are two electrical circuits that need calculations using the formulas above circuit 1 fans circuit 2 compressors If the rating value determined does not equal a standard current rating of ov...

Страница 28: ...ators Remove the shipping channels and mounting bolts from beneath the fan See Figure I PR 1 Open both fan compartment access doors to access the channels There are four mounting points for 20 38 ton...

Страница 29: ...lacement sheet that ships with the unit isolators Lift one end of the unit at a time to position the isolators Fasten the isolators to the floor using anchor bolts 2 Level the unit by adjusting the is...

Страница 30: ...e the plenum to the unit Do not remove more than two nonadjacent panels at one time Failure to do so will cause the plenum frame to collapse and may cause personal injury Treat field cut holes to prev...

Страница 31: ...coil duct static pressure tube This must be done before the coil box is bolted to the unit If the unit connection does not have a static pressure tube then no connection is required 5 Apply the edge p...

Страница 32: ...hanging bracket across the front of the damper cabinet Position it with its short flange pointing to four o clock and secure it with screws provided See Figure I PR 5 10 Lift the damper cabinet and p...

Страница 33: ...iameter 2 When installing pneumatic tubing between the head assembly and transducer in the control panel do not exceed 250 feet for 1 4 OD tubing or 500 feet for 3 8 OD tubing Installing theTransducer...

Страница 34: ...t indicator a local sensor and four LED s BAYSENS021 features and system control functions include Temperature sensing in the zone System control switch with mode setting for AUTO and OFF Supply air s...

Страница 35: ...is factory calibrated Function status indicator lights SYSTEM ON glows continuously during normal operation or blinks if system is in test mode COOL glows continuously during cooling cycles or blinks...

Страница 36: ...Recommended UnittoController Wiring Size 0 150feet 22gauge 151 240feet 20gauge 241 385feet 18gauge 386 610feet 16gauge 611 970feet 14gauge Pre Startup Requirements Zone Sensor Installation All sensor...

Страница 37: ...1B EN 37 Figure I PR 15 Typical zone sensor installation Pre Startup Requirements Figure I PR 14 Zone sensor mounting hole locations Junction Installation Mounting to Junction Box Mounting Directly to...

Страница 38: ...020B Description This seven day programmable sensor with night setback has four periods for occupied unoccupied programming per day Either one or all four periods can be programmed If power is interru...

Страница 39: ...s behind the sensor such as outside walls Airflows from adjacent zones or other units 140 mm 95 mm 140mm 95mm Installation Procedure 1 Remove the zone sensor module from the subbase Carefully hold the...

Страница 40: ...ght rolling motion Time Clock Installation Checklist 1 Ensure operating temperature is within 4 to 131 F 2 Locate the time clock at least 5 feet away from any large electrical contact or machinery to...

Страница 41: ...ice test function at the unit The RHI door has a locking screw to deter access by unauthorized person nel Additionally the RHI can control up to four different units Location Recommendations The HI mi...

Страница 42: ...l handy box and secure with the appropriate screws 5 Replace the microprocessor within the enclosure as follows a Verify that the terminal block jumpers are connected properly b Slide the extruded hin...

Страница 43: ...SCXF SVX01B EN 43 Pre Startup Requirements Figure I PR 24 Remote HI mounting holes and knockout locations Installation...

Страница 44: ...rip at the remote panel Connect the white lead to the positive terminal the black lead to the negative terminal and the bare shield wire to the terminal at the remote human interface panel Close the k...

Страница 45: ...ent contact with ground CAUTION Pre Startup Requirements Communication Wiring Note Communication link wiring is a shielded twisted pair of wire and must comply with applicable electrical codes An opti...

Страница 46: ...shipping covers Component Overview oVerify the fan and motor shafts are parallel Pre Startup Requirements oVerify the fan and motor sheaves are aligned oCheck the belt tension for proper adjustment o...

Страница 47: ...ggles between the display control screen and the display program screen 4 Erase Button Erases time and temperature settings throughout each of the programmed periods Exits temporary manual override 5...

Страница 48: ...d to set the correct time of day Used to set programmed time for temperature variations 3 Program Button Toggles between the display control screen and the display program screen 4 Erase Button Erases...

Страница 49: ...g the negative side will decrease the time Each time you depress the positive or negative side minus and plus the time will either advance or decrease respectively by one minute If you press and hold...

Страница 50: ...and plus keys the ZSM will increment rapidly Note Blank temperature settings may be entered at any of the four daily periods When a setpoint is left blank and in an occupied condition the ZSM will de...

Страница 51: ...mode See Figure I P 6 Programming Installation Depressing the day button will toggle the ZSM between the day and hour icon Depressing the mode button will toggle the ZSM between the heat and cool ico...

Страница 52: ...4 baud 1 1 1200 baud 19 CV or HP Operation 0 CV 0 1 HP 20 Default Cooling setpoint 45 to 98 F 74 F 21 Default Heating setpoint 43 to 96 F 68 F 22 MinimumCoolingSetpoint 45 to 98 F 45 F 23 MaximumHeati...

Страница 53: ...onds If your heating and cooling requirements are the same for each day of the week and for each day of the weekend your ZSM is designed to employ Intelligent Copy To program the five weekdays Monday...

Страница 54: ...ide timer 8 Only used when setting the override timer Figure I P 9 BAYSENS019 Complete IconDisplay 9 Displays the desired state of either OCCUPIED or UNOCCUPIED 10 The padlock symbol indicates that th...

Страница 55: ...setting the override timer 8 Only used when setting the override timer 9 Displays the desired state of either OCCUPIED or UNOCCUPIED in the Programming Run and Menu 10 The padlock symbol indicates th...

Страница 56: ...ogram 6 For 7 day time control press Day key 1 2 3 4 5 6 Monday through Saturday block of days appears in display Pressing Day key again 1 2 3 4 5 Monday through Friday appears in display Repeated pre...

Страница 57: ...al continually Replace worn or fraying belts in matched sets 3 Check voltage at all compressor terminals Actual voltage should be within 10 percent of nameplate voltage 4 Check voltage imbalance from...

Страница 58: ...________________________________________________________________________________________________________ Compressor Amp Draw Circuit A __________ __________ __________ Circuit B __________ __________...

Страница 59: ...Water Pressure psig __________ Leaving Water Pressure psig __________ Circuit D EnterWaterTemperature F __________ Leaving WaterTemperature F __________ Entering Water Pressure psig __________ Leavin...

Страница 60: ...ling setpoint Supply air heating setpoint Supply air static pressure setpoint ECEM Module Analog inputs Return air temperature Return air humidity In addition units with a VOM have Binary inputs VOM m...

Страница 61: ...e are no terminal strip locations associated with these wires They go directly from pins on the RTM circuit board to the actuator motor RTM Binary Outputs The RTM has an output with pressure switch pr...

Страница 62: ...panel with night setback was not ordered install a field supplied contact This binary input provides the building s occupied unoccupied status to the RTM It can be initiated by a time clock or a buil...

Страница 63: ...l terminal block Normally open closed contacts are provided Heat Module The heat module is standard on all units with factory installed heat It controls the unit heater to stage up and down to bring t...

Страница 64: ...e outside air humidity sensor and temperature sensor to utilize the lowest possible enthalpy level when considering economizer operation In addition it receives space pressure information to maintain...

Страница 65: ...1000 100 000 ohms The setpoints are linear between the values shown inTable O GI 6 on page 66 ReferenceTable O GI 7 on age 66 for corresponding input voltage setpoints Following are formulas to calcul...

Страница 66: ...ly Air Pressure Setpoint 0 5 to 4 5 vdc 0 0 to 5 0 IWC VAV units only Note 1 Input voltages less than 0 5 vdc are considered as 0 5 vdc input signal is lost the setpoint will clamp to the low end of t...

Страница 67: ...pump damage or stoppage due to excessive system pressure Water Cooled Condensers Units that are set up for variable water flow will modulate a water valve to maintain a user defined condensing temper...

Страница 68: ...s water inlet and the other is in the condenser bypass water inlet When the economizer valve is active the condenser bypass valve closes The economizer valve modulates thus water flow through the unit...

Страница 69: ...GuideVane Option Inlet guide vanes IGV s are driven by a modulating 0 10 vdc signal from the RTM module A pressure transducer measures duct static pressure and the IGV s modulate to maintain the supp...

Страница 70: ...at the same time optimize building mechanical cooling operation for peak operating efficiency Economizer operation enables when the outside air enthalpy is 3 BTU s lb less than the return air enthalp...

Страница 71: ...r unoccupied mode and when ambient conditions are favorable for economizing Inherent in the unit controller is the ability to suppress the setpoint below the normal unit setpoint This allows the build...

Страница 72: ...reset diagnos tic initiates Evaporator Temperature Sensor Frostat The evaporator temperature sensor is an analog input device used to monitor refrigerant temperature inside the evaporator coil to prev...

Страница 73: ...ing It is mounted in the supply air discharge section of the unit and connected to the RTM Supply Airflow Proving Switches This is binary input device used on units to signal the RTM when the supply f...

Страница 74: ...ycle Sequence of Operation heating setpoint and higher cooling setpoint Setpoints can be programmed at the HI Tracer Summit or the night setback zone sensor The unit enters the unoccupied mode when th...

Страница 75: ...ram when the unit returns to the occupied mode The intent of this binary output is to signal theVAV boxes or other terminal devices to go to a full open airflow position For units without volume contr...

Страница 76: ...r the EWT is within specified setpoints the RTM will attempt to use free cooling without using any compressors The RTM will use either the airside or waterside economizer option When outdoor air condi...

Страница 77: ...oling control Reset based on outdoor air temperature Outdoor air cooling reset is sometimes used in applications where the outdoor temperature has a large effect on building load When the outside air...

Страница 78: ...there are more than two compres sors in an air cooled unit the first two Sequence of Operation compressors are manifolded together If there are four compressors the second two are manifolded Compresso...

Страница 79: ...ble from 2 to 12 F In a steady state the unit will either maintain a constant level of cooling capacity with the supply air temperature within the control band or the highest active cooling level will...

Страница 80: ...ature below the low ambient compressor lockout temperature setpoint This setpoint is adjustable at the human interface panel Compressors will lock out when outdoor air temperature falls below that sel...

Страница 81: ...20 x 20 20 x 20 Without Hot Water or Steam Coil Note Filters can be 2 or 4 These views are from the back of the unit left to right With Hot Water or Steam Coil Note All filters are 2 These views are f...

Страница 82: ...ution Note Standing water in drain pans can promote microbial growth mold which may cause unpleasant odors and serious health related indoor air quality problems If microbial growth is found it must b...

Страница 83: ...or a WARNING center line See Figure O M 5 on page 84 for recommended torques 4 Once the sheaves are properly aligned tighten sheave set screws to proper torque SeeTables O M 1 and O M 2 on page 84 for...

Страница 84: ...to endure maximum bearing and drive component life and is based on fan brake horsepower requirements If frayed or worn replace belts in matched sets Measuring BeltTension Measure fan belt tension with...

Страница 85: ...fan and motor bearing life accelerate belt wear and possibly cause shaft failure Recommended belt tension range values are on the unit fan scroll To access the fan scroll face the right hand side of...

Страница 86: ...ay specific attention to the following Whenever removing refrigerant from air conditioning or refrigerating equipment recover for reuse recycle reprocess reclaim or properly destroy it Always determin...

Страница 87: ...recovering refrigerant use recycling equipment Always attempt to use methods that will pull the lowest possible system vacuum while recovering and condensing refrigerant into containment When leak che...

Страница 88: ...f each compressor circuit The vacuum will draw some of the required refrigerant into the system See Figure O M 9 on page 89 2 Complete the charging process by charging gaseous refrigerant into the suc...

Страница 89: ...SCXF SVX01B EN 89 Figure O M 9 Typical water cooled SXWF compressor section components Maintenance Owner...

Страница 90: ...Spray hubs and moving parts with dry silicone lubricant Mobil Mobilux 2 Shell alvonia 2 or equivalent Maintenance On occasion the inlet guide vane actuator or inlet guide vanes may need to be removed...

Страница 91: ...upon system operating hours filter maintenance and efficiency and dirt load Follow is the suggested method below Steam and Hot Water Coils 1 Disconnect all electrical power to the unit 2 Don the appr...

Страница 92: ...igh condensing tem peratures To maintain maximum condenser efficiency the condenser must remain free of built up scale and sludge Clean the condenser either mechanically or chemically Mechanical Clean...

Страница 93: ...dle assembly in the switch body 3 Remove the wire retainer clip by reaching down past the paddle with a pair of slim nosed pliers and gripping the end of the wire Pull up on the wire clip and remove i...

Страница 94: ...ng pressures Semi Annual Maintenance 1 Verify the fan motor is properly lubricated Follow lubrication recommendations on the motor tag or nameplate Contact the motor manufacturer for more information...

Страница 95: ...uges on the discharge and suction line access valves When the unit has stabilized after operating approximately 15 minutes at full load record suction and discharge pressures System malfunctions such...

Страница 96: ...n be reset by the HI Tracer Summit or by cycling power to the RTM CompressorTrip Ckt 1 2 3 or 4 Problem The compressor ckt 1 2 3 or 4 has tripped Reason for Diagnostic The ckt 1 2 3 or 4 compressor pr...

Страница 97: ...If so check field unit wiring between sensor and MCM SCM Reason for Diagnostic The unit is reading a signal that is out of range for the circuit 1 evaporator temperature sensor input temp 55 F or tem...

Страница 98: ...ion d A close damper request is sent to the economizer actuator control function Reset Required PMR A manual reset is required after the low air temp limit trip condition clears The diagnostic can be...

Страница 99: ...disables O A damper drives to minimum position onVAV units with S A temp reset type selected as O A temp reset the reset type reverts to none for the duration of the failure Reset Required PAR an auto...

Страница 100: ...roblem The RTM has lost communication with the SCM Check Check field unit wiring between the RTM and SCM Reason for Diagnostic The RTM has lost communication with the SCM UCM s Reaction A Lockout requ...

Страница 101: ...Supply Fan assembly If these are ok check field unit wiring between RTM and supply fan If the supply fan will run in service mode then verify airflow proving switch and wiring Reason for Diagnostic Th...

Страница 102: ...ion The active unoccupied zone heating setpoint reverts to the default value Reset Required PAR An automatic reset occurs after the designated unoccupied zone heat setpoint input returns to its allowa...

Страница 103: ...ter the Mixed AirTemp input returns to within range continuously for 10 seconds Water Flow Fail a Data used module packet byte bit WSM 01 19 05 b Activation Conditions The Water Flow input is detected...

Страница 104: ...1 electric heat 77 emergency stop 97 entering cond water temp sensor fail 97 entering water temp sensor fail 97 erase button 50 evap temp sensor failure 97 evaporator coil frost protection 80 evaporat...

Страница 105: ...als 53 request for supply fan operation 73 reset based on outdoor air temperature 77 reset based on zone temperature 77 return air humidity sensor failure 99 return air temp sensor failure 100 return...

Страница 106: ...61 VAV drive max output 61 75 VCM 64 VCM vommunication failure 102 velocity pressure sensor failure 102 ventilation control module 64 ventilation override module 63 VFD 69 VFD with bypass 69 voltage...

Страница 107: ...SCXF SVX01B EN 107...

Страница 108: ...il us at comfort trane com AnAmericanStandardCompany Literature Order Number File Number Supersedes Stocking Location SinceTheTrane Company has a policy of continuous product improvement it reserves t...

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