Carrier 48TM016-028 Installation, Start-up And Service Instructions Manual

Also see for 48TM016: User's information manual

Contents

44FAN SHAFT BEARINGS — Lubricate bearings at leastevery 6 months with suitable bearing grease. Extended greaseline is provided for far side fan bearing (opposite drive side).Typical lubricants are given below:*Preferred lubricant because it contains rust and oxidation inhibitors.CONDENSER AND EVAPORATOR-FAN MOTORBEARINGS — The condenser-fan and evaporator-fan motorshave permanently sealed bearings, so no field lubrication isnecessary.Evaporator Fan Performance Adjustment(Fig. 50 and 51) — Fan motor pulleys are factory set forspeed shown in Table 1.To change fan speeds:1. Shut off unit power supply.2. Loosen nuts on the 2 carriage bolts in the motor mountingbase. Install jacking bolt and plate under motor base (boltand plate are shipped in installer’s packet). Using bolt andplate, raise motor to top of slide and remove belt. Securemotor in this position by tightening the nuts on the car-riage bolts.3. Loosen movable-pulley flange setscrew (see Fig. 50).4. Screw movable flange toward fixed flange to increasespeed and away from fixed flange to decrease speed. In-creasing fan speed increases load on motor. Do not ex-ceed maximum speed specified in Table 1.See Table 22 for air quantity limits.5. Set movable flange at nearest keyway of pulley hub andtighten setscrew. (See Table 1 for speed change for eachfull turn of pulley flange.)6. Replace and tighten belts. See Belt Tension Adjustmentsection on page 45.To align fan and motor pulleys:1. Loosen fan pulley setscrews.2. Slide fan pulley along fan shaft.3. Make angular alignment by loosening motor frommounting plate.Evaporator Fan Service and Replacement — The48TM units use a fan motor mounting system that features aslide-out motor mounting plate. See Fig. 51. To replace or ser-vice the motor, slide out the bracket.1. Remove the evaporator-fan access panel and the heat-ing control access panel.2. Remove the center post (located between the evaporatorfan and heating control access panels) and all screwssecuring it.3. Loosen nuts on the 2 carriage bolts in the motor mountingbase.4. Using jacking bolt under motor base, raise motor to top ofslide and remove belt. Secure motor in this position bytightening 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.MANUFACTURER LUBRICANTTexaco Regal AFB-2*Mobil Mobilplex EP No. 1Sunoco Prestige 42Texaco Multifak 2Fig. 50 — Evaporator-Fan Pulleyand AdjustmentNOTE: A 31 / 2 -in. bolt and threaded plate are included in theinstaller’s packet. They should be added to the motor support chan-nel below the motor mounting plate to aid in raising the motor. Theplate part number is 50DP503842. The adjustment bolt is 3 /8 -16 x1 3 /4 in. LG.Fig. 51 — Evaporator-Fan Motor Section