Carrier 52M Performance Series- Manuals

n TO REMOVE THE AIR DISCHARGE GRILLE 1. Remove the 2 screws on each end of the air dischargegrille as shown in Figure 14. 2. Lift and rotate back the bottom edge of the dischargegrille and remove it. n TO REMOVE THE ALUMINUM TOP PANEL — Remove one screw from each end of the aluminumtop panel (locate...

n TO REMOVE THE DISCHARGE DECK 1. Remove the 2 discharge deck screws shown inFigure 17. Also remove the screw located at the topleft corner of the outdoor coil tube sheet. 2. Gently pull the left side panel out and lift theend of the discharge deck that the screws were re-moved from, up and forward,...

n TO REMOVE THE STATOR — After pulling the top of the condenser orifice away from the condenser coil,grasp the top of the stator and slide it up and out of thestator track. See Figure 20. STATOR CONDENSERORIFICE CONDENSERCOIL FIGURE 20 — REMOVING STATOR 9

GENERAL CLEANING Maintaining proper performance of 52S systems(Figure 21) requires conscientious cleaning and care ofcomponents. Specific components require periodic clean-ing and/or replacement, including the following: COMPONENT CLEANING SCHEDULE Indoor Air Filter Monthly Vent Air Filter Monthly I...

TOOLS NEEDED The following list includes the recommended tools, de-vices, and cleaning solutions for use in cleaning the 52Sunit components. Vacuum Cleaner with Crevice Tool Attachment, or Soft Plastic Bristle Brush Mild Household Detergent Phillips Head Screwdriver 5 ⁄ 16 -in. Nut Driver Flat Head ...

n CLEANING THE VENT AIR FILTER 1. Remove the unit chassis from wall sleeve as describedin the General Disassembly section of this manual.See Figure 6. 2. Swing open vent door. The filter is located directlybehind the vent door. See Figure 23. 3. Remove the vent air filter by gently pushing on thefil...

SEASONAL CLEANING n ACCESSING THE INDOOR AND OUTDOOR COILS — The minimum cleaning recommendation for indoor and outdoor coils is once per season. To accessthe coils for a thorough cleaning, it is necessary toremove the Air System. To accomplish this task, per-form the following steps: 1. DISCONNECT ...

n CLEANING THE INDOOR AND OUTDOOR COILS Coil fins are sharp and may cut hands. Wear heavyprotective gloves when cleaning coils. 1. Use a vacuum cleaner or soft bristle brush to removesurface fibers and dirt from each of the faces of thecoil. Both the inner and outer surfaces of the coilsmust be clea...

n CLEANING THE INDOOR FAN AND FAN SCROLL — Once the indoor fan wheel and the indoor fan scroll have been accessed, proceed with the cleaninginstructions detailed below: 1. Insert a piece of 9.5-in. by 9.5-in. cardboard betweenthe blower wheel and the opening in the blower scrollto prevent fungus and...

COMPRESSOR A cutaway view of the rotary compressor with key com-ponents labeled is shown in Figure 32. The motor sta-tor is rigidly attached to the compressor shell. The rotoris pressed onto the eccentric shaft, which is supportedby 2 bearings. Both the discharge valve and dischargemuffler are attac...

The rotary compression process (Figure 33), starts attop dead center as shown in (1). Suction gas flowsthrough the suction inlet and into the cylinder area. Asthe shaft rotates through 90 degrees, the rolling pis-ton moves to position A as shown in (2). The suction vol-ume is now the area defined by...

SYMPTOM g POSSIBLE CAUSE f COMPRESSOR STARTS AND RUNS BUT CYCLES ON THE OVERLOAD COMPRESSOR STARTS AFTER CYCLING THE OVERLOAD SEVERAL TIMES COMPRESSOR WILL NOT START. IT HUMS AND CYCLES ON THE OVERLOAD COMPRESSOR WILL NOT START AND MAKES NO NOISE COMPRESSOR CYCLES OFF (NOT ON OVERLOAD) COILS/FILTERS...

5. Next, test the resistance individually of each wire tothe shell of the compressor. The paint on the com-pressor can prevent good contact between the probeand the metal. The paint should be removed froma small section of the shell of the compressor to ensuregood contact by the meter probe. The vol...

n REMOVING THE COMPRESSOR — Follow the steps below to remove the compressor: 1. Disconnect all power to unit. 2. Remove unit from wall sleeve as detailed in theGENERAL DISASSEMBLY section. The unitweighs up to 150 pounds. Seek assistance or use alifting device when removing unit from wall sleeve. 3....

10. For Heat Pump Units remove the capillary tubeonly. 11. For Heat/Cool Units the filter drier is installed inthe liquid line, in place of the strainer. Trim thesaved liquid line tube from Step 9, to be 1.5 in. long(saving the crimped portion), and braze it into thefilter drier, Part No. KH43LG060....

HEATERS The heater in 52S units is located directly behind theevaporator coil. The heater assembly includes the heater(2.3 kW, 3.4 kW or 5 kW), a primary limit switch, anda secondary limit switch (Figure 41). The primary andsecondary limit switches are safety switches thatregulate heater operation. ...

3. Remove the unit from the sleeve as detailed in theGENERAL DISASSEMBLY section. 4. Remove the discharge air grille and the discharge airdeck as detailed in the GENERAL DISASSEMBLYsection. Save screws. 5. Once the air discharge deck is removed, the heaterassembly is exposed. After noting positions ...

OPERATING CONTROLS The controls and components used in the 52S coolingonly or heat/cool units are as follows: the selectorswitch, the indoor thermostat, the dual capacitor, thetemperature limiter, the vent lever, and the fan cycleswitch (Figure 45). The selector switch is used to determine the mode ...

DESCRIPTION OF SWITCH SETTINGS n OFF BUTTON — The OFF button terminates unit operation. n FAN ONLY BUTTON — Push button for air circula- tion without heating or cooling. n HIGH HEAT OR HIGH COOL — Push button and rotate temperature knob to desired comfort level. Thisfunction provides maximum heating...

SEQUENCE OF OPERATION n HEAT/COOL UNITS (Figure 50)Fan Mode — With the selector switch set to FAN and the fan switch set to fan cycle, contacts L1 to LO andFCS1 to LS are made. Cooling (Low) — With the selector switch set to low speed cooling and the fan switch set to fan cycle, contactsFCS2 to LO, ...

COMPONENT OPERATION ANDTROUBLESHOOTING n TOOLS NEEDED Volt-Ohmmeter Flat and Phillips Screw Drivers 5 ⁄ 16 -in. Nut Driver Side Cutting Pliers Before cleaning, servicing, performing maintenanceor removing the chassis from the wall sleeve, discon-nect all power to the unit to avoid the possibility of...

n INDOOR THERMOSTAT (Heat Pump Units) (cont) (Figure 54) — To verify operation of the heat pump in- door thermostat switch, a continuity test may be per-formed as follows: 1. Turn off unit power as described in GENERALDISASSEMBLY section. 2. Remove wire leads from thermostat. Note their loca-tions t...

n CAPACITOR — The 52S units use a dual capacitor. One part of the capacitor is used with the fanmotor. The other part of the capacitor is used by thecompressor.Run circuits on single-phase compressor motors usecapacitors which dramatically affect the motor opera-tion. Run capacitors are connected to...

ELECTRICAL COMPONENTS REMOVALAND REPLACEMENT n INDOOR THERMOSTAT — To remove the indoor thermostat, perform the following steps: 1. Turn off unit power as described in GENERALDISASSEMBLY section. 2. Remove the thermostat knob. 3. Remove control box escutcheon (Figure 58) to expose2 Phillips head mou...

n CAPACITOR — To remove the capacitor, perform the following steps:1. Turn off unit power as described in GENERALDISASSEMBLY section. 2. Open the control box (Figure 61) as detailed in theGENERAL DISASSEMBLY section of this manual. 3. Properly discharge the capacitor as described in theCapacitor sec...

FAN MOTOR The fan motor is a permanent split capacitor (PSC) typemotor. This motor is common in air-conditioning sys-tem applications. A PSC motor does not require the useof a relay and always has a run capacitor connectedbetween the run and start windings of the motor. SeeFigure 62. The 52S series ...

FAN MOTOR REPLACEMENT Perform the following steps to remove and reinstallthe fan motor: 1. DISCONNECT ALL POWER TO UNIT. 2. Remove the unit from the sleeve as detailed in theGENERAL DISASSEMBLY section and place theunit on a large flat surface. 3. Remove the discharge air grille, the aluminum toppan...

FIELD TEMPERA TURE CHAR TS See Figures 67 - 8 2 for field temperature data. FIGURE 67 — 52S 7,000 BTU UNIT FIELD TEMPERATURE CHART — LOW COOL — 50% RH 35

FIGURE 68 — 52S 7,000 BTU UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH 52S SERIES 36

FIGURE 71 — 52S 9,000 BTU UNIT FIELD TEMPERATURE CHART — LOW COOL — 50% RH 39

FIGURE 72 — 52S 9,000 BTU UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH 52S SERIES 40

FIGURE 75 — 52S 12,000 BTU UNIT FIELD TEMPERATURE CHART — LOW COOL — 50% RH 43

FIGURE 79 — 52S 14,000 BTU UNIT FIELD TEMPERATURE CHART — LOW COOL — 50% RH 47

WIRING SCHEMATICS Refer to Figures 83 - 87 for typical 52S unit wiring schematics. NOTE: Figures 83 - 87 should not be substituted for the schematic located next to the unit control box. LEGEND FCS — Fan Cycle SwitchIT — Indoor Thermostat L — Power Supply Line Component Connections (Marked) Componen...

MOST FREQUENT PTAC SERVICE QUESTIONS 1. Can remote thermostats be used on standard (AA) models? No, only for use on remote control (RC) models. 2. Which remote thermostats are acceptable for use on 52S products? HH01AD045 — Manual changeover thermostatTSTATCCPAC01 — Programmable AC thermostatTSTATCC...