Carrier 50TJ016 Installation, Start-up And Service Instructions Manual

Also see for 50TJ016: Installation, Start-Up and Service Instructions Installation instructions

Contents

4. Using jacking bolt under motor base, raise motor to topof slide and remove belt. Secure motor in this positionby tightening the nuts on the carriage bolts.5. Remove the belt drive.6. Remove jacking bolt and tapped jacking bolt plate.7. Remove the 2 screws that secure the motor mountingplate to the motor support channel.8. Remove the 3 screws from the end of the motor supportchannel that interfere with the motor slide path.9. Slide out the motor and motor mounting plate.10. Disconnect wiring connections and remove the 4 mount-ing bolts.11. Remove the motor.12. To install the new motor, reverse Steps 1-11.Belt Tension Adjustment — To adjust belt tension:1. Loosen fan motor bolts.2. Adjust belt tension:a. Size 016 Units: Move motor mounting plate up ordown for proper belt tension ( 1⁄2 in. deflection with onefinger).b. Size 020-028 Units: Turn motor jacking bolt to movemotor mounting plate up or down for proper belttension (3 ⁄8 in. deflection at midspan with one finger[9 lb force]).3. Tighten nuts.4. Adjust bolts and nut on mounting plate to secure motorin fixed position.Condenser-Fan Adjustment50TJ016,020 UNITS (Fig. 28)1. Shut off unit power supply.2. Remove access panel(s) closest to the fan to be adjusted.3. Loosen fan hub setscrews.4. Adjust fan height on shaft using a straightedge placed acrossthe fan orifice.5. Tighten setscrews and replace panel(s).6. Turn on unit power.50TJ024,028 UNITS (Fig. 29)1. Shut off unit power supply.2. Remove fan top-grille assembly and loosen fan hub screws.3. Adjust fan height on unit, using a straightedge placed acrossthe fan orifice.4. Tighten setscrews and replace rubber hubcap to preventhub from rusting to motor shaft.5. Fill hub recess with permagum if rubber hubcap ismissing.Economizer Adjustment — See Tables 11 and 12 forcheckout and outdoor-air temperature simulation. Make cer-tain the outdoor-air damper is fully closed and the return-airdamper is fully open before completing the following steps.1. Turn on power to the unit.2. Turn the thermostat fan switch to the ON position. Thedamper will go to the vent position.3. Adjust the vent position with the minimum damper po-sition adjustment on the module. See Fig. 15.4. Set the system selector switch to COOL position and setthe cooling temperature selector to its lowest setting.NOTE: The Cooling mode may also be simulated byremoving the thermostat wires from terminals Y1 andY2 and installing a jumper between terminals R and Y1.Refer to unit label diagram for terminal locations.NOTE: A 31 ⁄2 -in. bolt and threaded plate are included in the installer’spacket. They should be added to the motor support channel belowthe motor mounting plate to aid in raising the motor. The plate partnumber is 50DP503842. The adjustment bolt is 3⁄ 8 - 16 x 1 3⁄ 4-in. LG.Fig. 27 — 50TJ020-028 Evaporator-FanMotor SectionNOTE: Dimensions are in inches.Fig. 28 — Condenser Fan Adjustment,50TJ016,020NOTE: Dimensions are in inches.Fig. 29 — Condenser-Fan Adjustment,50TJ024,03022