Carrier 50HX Installation, Start-up, And Operating Instructions Manual

Also see for 50HX Guide: Manual

OUTDOOR FANKeep the outdoor fan free from all obstructions to ensureproper cooling operation. Never place articles on top of theunit. Damage to unit may result.1. Remove 2 screws at bottom of outdoor air intake grille andremove plastic grille.2. Inspect the fan blades for cracks or bends.3. If fan needs to be removed, loosen the setscrew and slide thefan off the motor shaft.4. When replacing fan blade, position blade so that the leadingedge is 2-in. back from outdoor inlet grille or 1/2-in. maxi-mum fro fan deck (See Fig. 25).5. Ensure that setscrew engages the flat area on the motor shaftwhen tightening6. Replace grille.ELECTRICAL CONTROLS AND WIRINGInspect and check the electrical controls and wiring annually. Besure to turn off the electrical power to the unit and install lockouttag.Remove the control/blower and compressor compartment accesspanels to locate all the electrical controls and wiring. Check allelectrical connections for tightness. Tighten all screw connections.If any smoky or burned connections are noticed, disassemble theconnection, clean all the parts, restrip the wire end and reassemblethe connection properly and securely.After inspecting the electrical controls and wiring, replace theaccess panel. Start the unit, and observe at least one completeheating cycle and one complete cooling cycle to ensure properoperation. If discrepancies are observed in either or both operatingcycles, or if a suspected malfunction has occurred, check eachelectrical component with the proper electrical instrumentation.Refer to the unit wiring label when making these checkouts.NOTE: Refer to the heating and/or cooling sequence of operationin this publication as an aid in determining proper controloperationREFRIGERANT CIRCUITInspect all refrigerant tubing connections and the unit base for oilaccumulations annually. Detecting oil generally indicates a refrig-erant leak.Table 13G—Superheat Charging Table, Unit 048–311TEMP (F)AIR ENTCONDEVAP AIR – CFM1550EVAP AIR – Ewb (F)56 58 60 62 64 66 68 70 72 74 7665SPH39.4 39.4 40.4 40.6 40.6 40.8 41.0 40.8 40.7 40.2 39.970 35.3 35.8 36.8 37.6 37.7 37.8 38.4 38.2 38.4 38.0 37.675 31.7 31.4 32.6 34.0 34.5 35.1 35.3 35.5 35.6 35.8 35.580 28.1 28.0 28.8 29.8 30.9 31.6 32.8 32.9 32.7 33.0 33.485 24.7 24.0 24.6 26.1 27.5 28.3 29.9 30.3 30.5 30.2 30.790 21.2 20.8 19.3 21.0 23.4 25.0 26.6 27.4 27.9 28.1 28.095 16.5 16.1 16.3 16.5 18.8 21.2 22.7 23.9 25.4 25.7 25.9100 12.4 7.5 5.6 11.5 14.9 16.8 19.1 21.4 22.0 23.3 23.5105 — — — — 9.7 12.7 15.2 18.3 19.5 20.2 21.1110 — — — — — 7.7 11.2 13.7 16.7 17.8 18.5115 — — — — — — — 7.3. 10.2 11.8 14.3Ewb-Entering Wet BulbSPH-Superheat at Compressor (F)– -Do not attempt to charge system under these conditions as refrigerant slugging may occur.Table 13H—Superheat Charging Table, Unit 060TEMP (F)AIR ENTCONDEVAP AIR – CFM1800EVAP AIR – Ewb (F)56 58 60 62 64 66 68 70 72 74 7665SPH21.0 21.0 21.0 22.8 24.7 26.5 27.8 29.1 30.4 29.5 28.670 16.5 16.5 16.5 18.8 21.1 23.5 25.2 27.0 28.8 28.2 27.675 12.0 12.0 12.0 14.8 17.6 20.4 22.7 24.9 27.2 26.9 26.680 10.5 10.5 10.5 12.7 14.9 17.1 19.8 22.5 25.2 25.4 25.585 9.0 9.0 9.0 10.6 12.3 13.9 17.0 20.0 23.1 23.8 24.590 4.5 4.5 4.5 6.5 8.5 10.5 14.3 18.1 21.9 22.7 23.595 — — — — 4.8 7.2 11.7 16.2 20.7 21.6 22.5100 — — — — — 3.6 8.6 13.6 18.6 20.0 21.4105 — — — — — — 5.5 11.1 16.6 18.5 20.4110 — — — — — — — 10.0 15.5 17.5 19.4115 — — — — — — — 9.2 14.7 16.5 18.5Ewb-Entering Wet BulbSPH-Superheat at Compressor (F)– -Do not attempt to charge system under these conditions as refrigerant slugging may occur.30