Carrier P - Manuals

5 ACCESSING UNIT COMPONENTS ACCESSING INDOOR-AIR SECTION COMPONENTS ■ REMOVE LATERAL DUCT EXTENSION ACCESSORY FOR UNITS EQUIPPED WITH THE LATERAL DUCT 1. Remove the 2 top screws that secure the lateral duct plenum to the top of the lateral duct exten-sion. See Figure 8. 2. Locate and remove the 2 bo...

52C,P SERIES 6 ■ DETACH THE CONDENSER ORIFICE FROM THE CONDENSER COIL 1. Remove top half of condenser orifice. a. Unscrew the top half of the condenser orifice by backing off the 4 captive screws. See Figure 13. b. Using a flat head screwdriver, gently pry the top half of the orifice from the tube s...

52C,P SERIES 8 REINSTALL FRONT PANEL 1. Grasp the front panel firmly at the center of the top and bottom of the panel, tilting it forward 5 to 10 degrees from the vertical. See Figure 4. 2. Place the top of the front panel onto the unit, making sure the top engagement posts have engaged the slots on...

9 GENERAL CLEANING Maintaining proper performance of 52C,P systems requires conscientious cleaning and care of compo-nents. See Figure 20. Specific components require periodic cleaning and/or replacement, including the following: COMPONENT CLEANING SCHEDULE CLEANING AND SAFETY Before starting to cle...

52C,P SERIES 10 TOOLS NEEDED The following list includes the recommended tools, devices, and cleaning solutions for use in cleaning the 52C,P unit and components. MONTHLY CLEANING ■ AIR FILTERS — The indoor and vent air filters should be cleaned once per month. Filters that are not cleaned become cl...

11 SEASONAL CLEANING The indoor and outdoor coils should be cleaned at least once during every season. Refer to ACCESSING UNIT COMPONENTS section to prepare unit. ■ CLEANING THE INDOOR AND OUTDOOR COILS 1. Use a vacuum cleaner or soft bristle brush to remove surface fibers and dirt from the interior...

52C,P SERIES 12 DRAIN VALVE FIGURE 24 — VACUUMING EVAPORATOR COIL FIGURE 25 — CLEANING COILS FIGURE 23 — PTAC EXTERIOR SURFACES FIGURE 26 — BASEPAN SECTION

13 COMPRESSOR A cutaway view of the rotary compressor with key components labeled is shown in Figure 27. The motor stator is rigidly attached to the compressor shell. The rotor is pressed onto the eccentric shaft, which is sup-ported by 2 bearings. Both the discharge valve and dis-charge muffler are...

52C,P SERIES 14 The rotary compression process (Figure 28), starts at top dead center as shown in (1). Suction gas flows through the suction inlet and into the cylinder area. As the shaft rotates through 90 degrees, the rolling piston moves to position A as shown in (2). The suction volume is now th...

15 FIGURE 29 — BASIC COMPRESSOR TROUBLESHOOTING GUIDE 5. Next, perform a grounded windings test to test the resistance individually of each wire to the shell of the compressor. The paint on the compres-sor can prevent good contact between the probe and the metal. The paint should be removed from a s...

52C,P SERIES 18 HEATERS The heater in 52C,P units is located directly behind the evaporator coil. The heater assembly includes the heater (2.3 kW, 3.4 kW or 5 kW), a primary limit switch, and a secondary limit switch. See Figure 34. The primary and secondary limit switches are safety switches that r...

19 ■ TOOLS NEEDED — The following list includes rec- ommended tools and devices for working on the heater section of 52C,P units. Perform the following steps to remove the Heater Assembly. 1. DISCONNECT ALL POWER TO UNIT.2. Remove heater by following instructions in ACCESSING UNIT COMPONENTS section...

52C,P SERIES 20 OPERATING CONTROLS UNIT-MOUNTED CONTROLS The controls and components used in the 52C,P cool-ing only or heat/cool units are as follows: the selec-tor switch, the indoor thermostat, the dual capacitor, the temperature limiter, the vent lever, and the fan cycle switch. See Figure 37.Th...

52C,P SERIES 22 R Y W G O C R Y W G O C R Y W G O C R Y W G O C R Y W G O C T’STAT MASTER PTAC UNIT 1 UNIT 2 UNIT 3 FIGURE 43 — TYPICAL WIRING FOR MULTIPLE 52C PTAC UNITS CONNECTED TO ONE WALL THERMOSTAT All units must be connected to same ground source. To accomplish this, be sure to connect all un...

23 DESCRIPTION OF SELECTOR SWITCHSETTINGS (Figure 44) ■ OFF MODE — The OFF position terminates unit operation. ■ FAN ONLY MODE — Use fan only position for air circulation without heating or cooling. Fan runs at high speed. ■ HIGH HEAT OR HIGH COOL MODE — Position selector and temperature control kno...

52C,P SERIES 24 SEQUENCE OF OPERATION ■ HEAT/COOL UNITS (Figure 45) Fan Mode — With the selector switch set to FAN con-tacts L1 to HI and FCS1 to LS are made.Cooling (Low) — With the selector switch set to low speed cooling contacts FCS2 to LO, COMP to FCS1, and COMP to IT3 are made.Cooling (High) —...

52C,P SERIES 26 ■ OUTDOOR FROST THERMOSTAT (Heat Pump Units) (Figure 50A and 50B) — The Outdoor Frost Thermostat (OFT) is a thermostat that uses a single-pole switch with a manual override selector. The ther-mostat switches between electric heat and compressor operation when the temperature of the o...

52C,P SERIES 28 4. Remove the thermostat capillary from the outdoor coil and clip any wire ties holding the capillary in place. 5. Disconnect the wires and carefully remove the thermostat and capillary from the unit, noting location of wires for easy re-assembly. 6. Reverse Steps 1-5 to reinstall. ■...

29 FAN MOTOR The fan motor is a permanent split capacitor (PSC) type motor. This motor is common in air-conditioning system applications. A PSC motor does not require the use of a relay and always has a run capacitor con-nected between the run and start windings of the motor. See Figure 55.The 52C,P...

52C,P SERIES 30 FIGURE 56 — FAN MOTOR TROUBLESHOOTING CHART TYPICAL 208/230 VOLT MOTORS NOTE: Resistance values are approximate. TYPICAL 265 VOLT MOTORS NOTE: Resistance values are approximate. FIGURE 57 — TYPICAL 52C,P FAN MOTORS POSSIBLE CAUSE SYMPTOM Motor Hums But Does Not Start Makes No Noise a...

31 FAN MOTOR REPLACEMENT 1. DISCONNECT ALL POWER TO UNIT.2. Remove the unit from the sleeve as detailed in the UNIT DISASSEMBLY section and place the unit on a large flat surface. 3. Remove the discharge deck and grille as detailed in Remove the Discharge Deck Assembly section. 4. Remove heater plat...

52C,P SERIES 32 14 16 18 20 22 50 60 70 80 90 100 1 1 0 120 130 Outdoor Air T emperature (F) (40% RH) 70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor Indoor Coil Delta T emperature (F) FIELD TEMPERATURE CHARTS Refer to Figures 59-67 for field temperature data. FI G U R E 59 — 52C A N D 52 P 70 00 BT...

52C,P SERIES 38 20 25 30 35 40 50 52 54 56 58 60 62 64 66 68 70 72 74 Indoor Entering Air T emperature (F) Indoor Air T emperature Rise (F) 208 V , 2.3 kW 208 V , 3.4 kW 230/265 V , 2.3 kW 230/265 V , 3.4 kW F IG U RE 65 — 5 2 C AN D 52P 700 0/ 900 0 B T U U N IT F IELD TEMPERA T URE CH AR T F O R E...

39 15 20 25 30 35 40 45 50 52 54 56 58 60 62 64 66 68 70 72 74 Indoor Entering Air T emperature (F) 208 V , 2.3 kW 208 V , 3.4 kW 208 V , 5.0 kW 230/265 V , 2.3 kW 230/265 V , 3.4 kW 230/265 V , 5.0 kW Indoor Air T emperature Rise (F) F IG U RE 66 — 52 C AN D 5 2 P 1 2 ,00 0 /15,0 00 BT U UN IT F IE...

41 WIRING DIAGRAMS Refer to Figures 68-72 for Typical Wiring Schematics. NOTE: Figures 68-72 should not be substituted for the schematic located on control box. FIGURE 68 — 52CQ & 52PQ — TYPICAL WIRING SCHEMATIC FOR STANDARD HEAT PUMP UNITS COMPONENT LEGEND Component Connection (Marked) Componen...

52C,P SERIES 42 TYPICAL THERMOSTAT INTERFACE 1. If ‘W’ is ON, then ‘FR’ is forced ON (regardless of ‘G’) & ‘CR’ is forced OFF.2. If ‘Y’ is ON, then ‘FR’ is forced ON (regardless of ‘G’).3. If IFT (indoor coil) is < 35° F, then ‘CR’ is forced OFF until IFT is > 39° F. T’STAT OUTPUT: RC CONT...

52C,P SERIES 44 FIGURE 71 — 52CE AND 52PE — TYPICAL WIRING SCHEMATIC FOR WALL THERMOSTAT CONTROL HEAT/COOL UNITS NOTES: 1. Recommended for use on grounded power supply only.2. Compressor and fan motor thermally protected.3. Use copper conductors only.4. All wiring must conform with NEC and local cod...

52C,P SERIES 46 MOST FREQUENT PTAC SERVICE QUESTIONS 1. Can remote wall thermostats be used on standard (AA) models? No, only for use on remote control (RC,RP) models. How-ever, accessory RC-Retrofit Kit can be ordered to convert standard units to RC units. 2. Which remote thermostats are acceptable...

47 ACCESSORIES *Extended metal wall sleeve also available in 26 in. and 28 in. depth. †Custom colors are also available. ACCESSORY FORM NUMBER PART NUMBER DESCRIPTION Wall Sleeves 52S-48SI WALL-SLEEVE-1PK Non-Insulated Plastic Wall Sleeve, 1 per pack WALL-SLEEVE-9PK Non-Insulated Plastic Wall Sleeve...

52C,P SERIES 48 52C PERFORMANCE AND PHYSICAL DATA FIGURE 73 — 52CE — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT/COOL UNITS FIGURE 74 — 52CQ — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT PUMP UNITS CATALOG NUMBER COOLING (Btuh) EER ELECTRIC HEAT (Btuh) COP REVERSE CYCLE HEAT (Btuh) EVAP. FAN...

49 52P PERFORMANCE AND PHYSICAL DATA FIGURE 75 — 52PE — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT/COOL UNITS FIGURE 76 — 52PQ — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT PUMP UNITS CATALOG NUMBER COOLING (Btuh) EER ELECTRIC HEAT (Btuh) COP REVERSE CYCLE HEAT (Btuh) EVAP. FAN CFM (HI-SPEE...