Carrier 38EYA- Manuals

SWEAT CONNECTION To avoid valve damage while brazing, service valves must bewrapped in a heat-sink material such as a wet cloth. Wrap service valves and filter drier with a wet cloth or heat-sinking material. Braze connections using either silver bearing ornon-silver bearing brazing material. Do not...

5. Repeat this procedure as indicated in Fig. 10. System will then be free of any contaminants and water vapor. FINAL TUBING CHECK IMPORTANT: Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment. Ensure tubes arenot rubbing against each other or any shee...

2. Unit is shipped with valve stem(s) front seated (closed) and caps installed. replace stem caps after system is opened torefrigerant flow (back seated). Replace caps finger-tight andtighten with wrench an additional 1/12 turn. Use a backupwrench on valve body flats to prevent distortion of sheetme...

outdoor temperature falls below setting of outdoor thermostat(field-installed option), contacts close to complete circuit and bringon sec bank of supplemental electric heat. When thermostat is satisfied, its contactors open, de-energizingcontactor and sequencer. All heaters and motors should stop. Q...

3. Measure liquid line temperature by attaching an accurate thermistor type or electronic thermometer to liquid nearoutdoor coil. 4. Refer to Heat Pump Charging Instructions label on outdoor unit. 5. Refer to Table 4. Find the point where required subcooling temperature intersects measured liquid se...

wrench an additional 1/12 turn (15 ft-lb). DO NOT OVER-TIGHTEN. REFRIGERANT TUBING AND FILTER DRIER Installation of filter drier in liquid line is required. Connect vapor tubing to fittings on outdoor unit vapor servicevalves. Connect liquid tube to filter drier. (See Table 1 and Fig. 8.)Use refrige...

1. Pump system down to 28 in. of mercury and allow pump to continue operating for an additional 15 minutes. 2. Close service valves and shut off vacuum pump. 3. Connect a nitrogen cylinder and regulator to system and open until system pressure is 2 psig. 4. Close service valve and allow system to st...

24 VAC HOT R G W/W1 Y/Y2 O/W2 R W2 W3 E RVS COOLING C B S1 S2 W2 CARRIER PROGRAMMABLE THERMOSTAT MODEL HP FA, FB, FX FAN COIL HEAT PUMP G Y1/W2 L R O INDOOR FAN HEAT STAGE 2 COOL/HEATSTAGE 1 NOT USED 24 VAC COM NOT USED TROUBLE OPTIONALOUTDOORSENSORCONNECTION Y C C * * * IF AVAILABLE * A97561 A97563...

24 VAC HOT R C W2 Y G R C RVS COOLING C W2 OTHER BRAND HP THERMOSTAT FA, FB, FX FAN COIL HEAT PUMP G O E W2 E W3 R Y 24 VAC COM HEAT STAGE 2 COOL/HEATSTAGE 1 INDOOR FAN EMERGENCYHEAT O * * * IF AVAILABLE * A97577 A97579 24 VAC HOT R C W2 Y G R W3 W2 G RVS COOLING E W2 OTHER BRAND HP THERMOSTAT TWO O...

G R Y/Y2 O/W2 CARRIER DUAL FUEL THERMOSTAT MODEL DF SINGLE-STAGE FURNACE HEAT PUMP G Y W C Y R O W2 Y1/W2 C B L S1 S2 R C FURNACE COMPRESSOR FAN 24 VAC HOT 24 VAC COM N/A RVS HEATING RVS SENSING OUTDOORSENSORCONNECTION OUTDOORTEMPERATURESENSOR W/W1 See note 7 RVS COOLING A97538 G R Y/Y2 O/W2 CARRIER...

24 VAC HOT R G W/W1 Y/Y2 O/W2 RVS COOLING C B S1 S2 CARRIER PROGRAMMABLE THERMOSTAT MODEL HP FA, FB, FX FAN COIL WITH SMART HEAT HEAT PUMP Y1/W2 L R C Y G O W2T W3 W2D Y 0 R C O W2 Y INDOOR FAN HEAT STAGE 2 COOL/HEATSTAGE 1 NOT USED 24 VAC COM NOT USED TROUBLE OPTIONALOUTDOORSENSORCONNECTION JW1 A97...

Back seating service valves are not equipped with Schradervalves. Fully back seat (counter clockwise) valve stem beforeremoving gage port cap. Do not vent refrigerant to atmosphere. Recover during systemrepair or final unit disposal. Follow these steps to properly start up the system. 1. Fully back ...

• 3–phase scroll compressors are rotation sensitive.• A flashing LED on phase monitor indicates reverse rotation.(See Fig. 18 and Table 3.)• This will not allow contactor to be energized.• Disconnect power to unit and interchange 2 field wiringleads on unit contactor. SEQUENCE OF OPERATION NOTE: Def...

Step 14—Check Charge UNIT CHARGE Factory charge is shown on unit rating plate. To check charge incooling mode, refer to Cooling Only Procedure. To check chargein heating mode, refer to Heating Check Chart Procedure. COOLING ONLY PROCEDURE NOTE: If superheat or subcooling charging conditions are not ...

Step 15—Final Checks IMPORTANT: Before leaving job, be sure to do the following: 1. Securely fasten all panels and covers. 2. Tighten service valve stem caps to 1/12-turn past finger tight. 3. Leave User’s Manual with owner. Explain system operation and periodic maintenance requirements outlined in ...