Carrier 40RMS008-034, 40RMQ008-028, 40RM007-034 specifications Fan Shaft Bearing

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Centering Fan Wheel — If fan and fan shaft assembly are not properly centered, blades may scrape against scroll or may create an objectionable whistling noise. It may be neces- sary to adjust individual fan wheels or move entire fan shaft. See the following two sections.

Fan Shaft Position Adjustment — Loosen set- screw or locking collar of each fan shaft bearing. Slide shaft into correct position and replace locking collar (Fig. 21). To re- place locking collar, push collar up against inner face of bear- ing. Turn collar in direction of fan rotation until tight, and tight- en setscrew. Tightening locking collar in direction of fan rota- tion results in further tightening of collar should setscrew work itself loose.

Fig. 21 — Fan Shaft Bearing

Individual Fan Wheel Adjustment — Loosen the 2 locking bolts holding fan wheel hub to shaft. See Fig. 20. Position fan wheel in center of the fan housing and tighten locking bolts. Clearance between wheel and housing should be the same on both sides.

Fan Belts — Motor mounting plate and motor support an- gles are slotted to permit both vertical and horizontal adjust- ment. Adjust belt(s) for correct deflection by loosening motor plate mounting bolts, moving motor/plate assembly forward or back, and retightening bolts. Press down on belt with one fin- ger midway between fan and motor pulleys to check deflection. For units with motor sizes up to and including 3.7 Hp (2.76 kW), correct deflection is 3/16-in. (4.8 mm). For larger motor sizes, correct deflection is 1/8-in. (3.2 mm). See Fig. 22.

NOTE: The 028 and 034 size units with 60 Hz motors (standard or medium static drive) are shipped with an extra set of belts. Use the preinstalled belts or extra belts depending on the adjustable pulley setting.

If complete belt replacement is required during servicing, loosen the motor plate mounting bolts (Fig. 22), move motor/ plate assembly towards fan pulley, and pull belt(s) off pulleys. Reverse the procedure with new bolts and readjust deflection.

Fan Rotation — Correct fan rotation with respect to fan outlet is shown in Fig. 23.

To reverse the direction of rotation of a 3-phase fan motor, reverse any 2 of the power leads. Refer to the connection dia- gram on the inside of motor terminal box cover for proper re- versing procedure of single-phase motor.

Fig. 22 — Fan Motor Mounting

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Contents Installation, Start-Up Service Instructions Installation 40RM Physical Data, English Cooling Units 008 012 016 024 028 Nominal Capacity Tons 40RMQ Physical Data, English Heat Pump UnitsUnit 40RMQ No. of Splits No. of Circuits per Split40RMS Physical Data, English Chilled Water Units Unit 40RMS40RM Physical Data, SI Cooling Units Unit 40RM40RMQ Physical Data, SI Heat Pump Units 40RMS Physical Data, SI Chilled Water Units Unit Unit Weight 40RM024 40RM01440RM016 40RMQ01640RMQ028 40RM02840RM034 40RMS028007 008 010 012 014 016 024 028 034 40RM 40RM 016 - B 5 0 1 GCUnit 40RMQ 40RMSTypical Unit Positioning Preferred Suspension Technique Refrigerant and Chilled Water Piping Access Holes TXV Sensing Bulb Location Factory-Installed Nozzle and Distributor Data Fitting Requirements014-024 Typical 40RMS Chilled Water Piping Condensate Drains Wiring and Service Access Side Panel Removed Cover Removed TypicalElectrical Data, Standard Motors MocpElectrical Data, Alternate Motors MocpHTR EquipGND IFCLubricant Data Manufacturer LubricantFan Shaft Bearing Fan Pulley Alignment Align as follows Filter Removal/Replacement 40RMS 40RMQ Fan Motor Data, Standard Motor EnglishFan Motor Data, Alternate Motor English Fan Motor Data, Standard Motor SI Fan Motor Data, Alternate Motor SIStandard Drive Data, 60 Hz English Medium-Static Drive Data, 60 Hz EnglishHigh-Static Drive Data, 60 Hz English Standard Drive Data, 60 Hz SI008 012 016 024 028 Medium-Static Drive Data, 60 Hz SIHigh-Static Drive Data, 60 Hz SI 40RMQ Unit Standard Drive Data, 50 Hz EnglishMedium-Static Drive Data, 50 Hz English Unit 40RMQ 40RMS014 034 008 012 016 024 High-Static Drive Data, 50 Hz EnglishStandard Drive Data, 50 Hz SI Medium-Static Drive Data, 50 Hz SI High-Static Drive Data, 50 Hz SIUnit Airflow RMQ007 400 External Static Pressure in. wg 40RM CfmRpm Bhp 800 008 000850 External Static Pressure kPa100 150 200 250 300 990350 400 450 500 550 600 008 600 016 300921 975 1026 016 2830 External Static Pressure kPa 100 150 200 250 300008 1420 024 3300External Static Pressure kPa 350 400 450 500 550 600 Unit Airflow Pressure Drop Copyright 2004 Carrier Corporation Preliminary Information Check Voltage Imbalance Comp A1 Comp B1
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