McQuay SWT C Series Installation And Maintenance Manual Download Page 39

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IM709

Replacement Parts

Filters

Description

McQuay Part

Number

Zone temperature sensor with tenant override

111048101

Outside air temperature sensor

060004703

Airflow proving switch

060015801

Discharge air temperature sensor

060004702

Return air temperature sensor

060004703

Freeze stat

072502001

Unit Size

Filter Size

Qty

Part Number

2"-35%

4"-35%

4"-65%

4"-85%

018-028

20 x 20
20 x 25

4
4

072407703
072407704

072402303
072402304

072405703
072405704

072407603
072407604

035-040

20 x 20
20 x 25

5
5

072407703
072407704

072402303
072402304

072405703
072405704

072407603
072407604

Summary of Contents for SWT C Series

Page 1: ...2 McQuay International Self contained Air Conditioning System Type SWT C Vintage Sizes 18 thru 40 Installation and Maintenance IM 709 Group Applied Systems Part Number IM709 Date January 2002 MEA 368...

Page 2: ...Compressor Control 4 Compressors 4 5 or 6 Stage 29 Standard Controls 30 High Pressure Switches 30 Low Pressure Switches 30 Compressor Motor Protector 30 Proof of Airflow Switch 30 Frost Protection Sw...

Page 3: ...sibility of the installer The MicroTech II self contained unit controller is standard equipment on C vintage units For a detailed description of the MicroTech components input output configurations fi...

Page 4: ...ing Plywood sheeting may be used to protect surfaces and distribute weight loading Vibration Isolators All units are provided with 1 neoprene isolation pads shipped separately Pads are to be installed...

Page 5: ...modification Units not ordered for modular construction do not have victaulic couplings on the water pipes and the various control sensors are mounted in the unit Two steel plates the height of the se...

Page 6: ...main cooling heating section The four items are located on the right side of the section when facing the front of the unit A hole is provided leaving the main cooling heat ing section entering the fi...

Page 7: ...relief valve The valve is set to open when refrigerant pressure reaches 400 psig The relief valve will accommodate a 1 2 flare connection for applications where it is necessary to connect vent piping...

Page 8: ...y water in connection is always the lower connection 5 Units with factory mounted water side economizer should not require head pressure control The econo mizer will typically elevate the water temper...

Page 9: ...2 5 50 3 2 60 3 8 70 4 4 80 5 1 90 5 7 100 6 3 150 9 5 Note HP total unit compressor horsepower 200 12 6 4 0 h p 2 0 h p 2 5 h p 3 0 h p 3 5 h p Water Flow Rate gpm L s 40 2 5 50 3 2 60 3 8 70 4 4 80...

Page 10: ...te line should be pitched away from the unit with a minimum slope of 1 8 per foot Drain pans and the drain trap should be kept clean by periodic cleaning A cleanout is provided as standard in the trap...

Page 11: ...drawings When connecting duct work to the unit use a canvas type connecting collar To maintain specified fan performance two fan units should incorporate a properly designed pants duct connection ref...

Page 12: ...tes the machine room wall s This will help prevent vibration generated by air movement in the duct from being transmitted out to the occupied spaces Note Do not obstruct unit access panel located belo...

Page 13: ...180 11340 13980 15780 CONDENSER Quantity 2 3 4 3 4 4 4 4 W S working press 400 400 400 400 400 Min entering temp F 55 55 55 55 55 DATA SWT MODEL SIZE 018C 023C 028C 035C 040C COMPRESSOR Quantity 2 3 4...

Page 14: ...ER MIN GPM L s MAX GPM L s CKT 1 CKT 2 CKT 3 CKT 4 018C 6 6 24 1 5 42 2 7 6 6 6 36 2 3 62 4 0 6 6 6 6 48 3 0 84 5 3 023C 6 6 6 35 2 2 65 4 1 6 6 6 6 48 3 0 84 5 3 6 6 6 6 58 3 7 102 6 4 6 6 6 10 58 3...

Page 15: ...ENGTH 1 2 84 00 84 00 84 00 84 00 84 00 2134mm 2134mm 2134mm 2134mm 2134mm C HEIGHT 1 2 112 75 112 75 112 75 112 75 112 75 2864mm 2864mm 2864mm 2864mm 2864mm D FAN DISCHARGE 18 62 21 88 21 88 18 62 18...

Page 16: ...C have a single mechanical access panel in bottom front and bottom back F F D D 15 0 381 E 6 46 164 34 0 864 78 5 199 4 B 72 0 182 8 Mechanical Access Power entry 7 8 2 2 KO Electrical Access MicroTec...

Page 17: ...creased by approximately 3 5 89mm for piping connections when water economizer option is ordered 8 Mechanical access panel s in the back of the unit start 2 51mm below return duct opening Do not obstr...

Page 18: ...185 20 hp Open Dripproof 214 214 214 25 hp Open Dripproof 266 3 hp Totally Enclosed 72 5 hp Totally Enclosed 85 71 2 hp Totally Enclosed 140 140 10 hp Totally Enclosed 170 170 170 170 15 hp Totally E...

Page 19: ...ry mounted nonfused disconnect is available Return Air and Outside Air Sensors All units are provided with a return air sensor The outside air sensor is optional and can be ordered with the unit The r...

Page 20: ...310 19 of the National Electrical Code 5 Wires should be sized for a maximum of 3 voltage drop Lug Sizes For Single Disconnect or Power Block Horsepower TYPE 208 60 3 230 60 3 400 50 3a a 460 60 3 mot...

Page 21: ...accessible without removing any safety or access panels Low voltage components are located in the upper left com partment and include 1 MicroTech II Main Control Board MCB 2 Duct Static Pressure Sens...

Page 22: ...ITS PWR ELEC HEATERS ELECTRIC HEAT JCT BOX S4 5 SWITCHES INVERTER BYPASS MAIN CONTROL HP1 6 HI PRESSURE CONTROLS REFRIG ON COMPRESSORS 1 6 S7 SWITCH LOCAL ON OFF TO CONTROLLER MAIN CONTROL HTR 11 12 E...

Page 23: ...IM709 23 Typical Wiring Schematics Figure 19 Power Schematic...

Page 24: ...24 IM709 Figure 20 Input Schematic Discharge Air Control DAC...

Page 25: ...IM709 25 Figure 21 Input Schematic Zone or Space Comfort Control SCC...

Page 26: ...26 IM709 Figure 22 Output Schematic Actuator Control...

Page 27: ...IM709 27 Figure 23 Output Schematic Auxiliary Fan Start Stop Control...

Page 28: ...28 IM709 Figure 24 Output Schematic Actuator Control...

Page 29: ...IM709 29 Figure 25 Output Schematic Compressor Control 4 Compressors 4 5 or 6 Stage...

Page 30: ...proof of airflow switch PC7 is provided with all units The switch is factory set to close at 0 2 inches of H2O The switch has a field adjustable set point range of 0 17 to 5 0 inches of H2O Turn adju...

Page 31: ...ic or metal tubing may be required Carefully select the ductwork sensing point for the pressure sensor Improper location of the sensing point will result in unsatisfactory operation of the entire vari...

Page 32: ...in the unit next to the condenser piping connections If a loss of condenser water flow is sensed the compressors will be locked out via the MicroTech II controller When flow is restored the unit will...

Page 33: ...provides and installs the sensor tubing from unit mounted sensor s to duct location s The static pressure setpoint is keypad adjustable through the MicroTech II DDC controller All variable air volume...

Page 34: ...d in the unit 8 Make sure that the return air temperature sensor and optional space temperature sensor if used have been installed in the return air duct and that the wiring termina tions have been ma...

Page 35: ...cted ductwork e Check for very low mixed air temperatures to the unit f Verify that all the distributor tubes expansion valve and liquid line components are feeding the evaporator coil g Verify that a...

Page 36: ...ubcooling discharge temperature liquid line temperature 6 If the calculated subcooling value is less than 8 F refrig erant needs to be added 7 Monitoring discharge pressure and liquid line tempera tur...

Page 37: ...s found in Step 3 a If the value is below the minimum the belts are too loose and should be tightened b If the value is higher the belts are too tight and tension should be decreased When new belts ar...

Page 38: ...rage 11 Check operating temperatures and pressures 12 Check and adjust temperature and pressure controls 13 Check and adjust linkages 14 Check operation of all safety controls 15 Lubricate door latch...

Page 39: ...0015801 Discharge air temperature sensor 060004702 Return air temperature sensor 060004703 Freeze stat 072502001 Unit Size Filter Size Qty Part Number 2 35 4 35 4 65 4 85 018 028 20 x 20 20 x 25 4 4 0...

Page 40: ...ill provide at the Company s option free replacement parts for the motor compressor free replacement for any integral component of the motor com pressor which is defective in material or workmanship E...

Page 41: ...s No H Has the Installing Contractor installed the Return Air Temperature Sensor in the Return Air stream Yes No I Has the Installing Contractor installed the high low Static Pressure Sensor tubing in...

Page 42: ...emperature Deg F _____ H Supply air temperature Deg F _____ I Compressor Readings J Electrical Heat Readings When installed FLA amps nameplate Reading Compressor 1 Compressor 2 Compressor 3 Compressor...

Page 43: ...t psig Comp No 5 Comp No 6 Low Press Cut out psig Low Press Cut in psig High Press Cut out psig GENERAL A Are all control lines secure to prevent excessive vibration and wear Yes No B Are all gauge po...

Page 44: ...13600 Industrial Park Boulevard Minneapolis MN 55441 USA 763 553 5330...

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