Carrier INFINITY 50XT-A- Manuals

8 CONVERTING HORIZONTAL DISCHARGE UNITS TODOWNFLOW (VERTICAL) DISCHARGE UNITS ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death.Before installing or servicing system, always turn off main power to system and tag lockout. There may be more than one discon...

9 TRAPOUTLET 1-in. (25 mm) min. 2-in. (51 mm) min. A09052 Fig. 10 -- Condensate Trap Step 7 — Install Electrical Connections ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death.The unit cabinet must have an uninterrupted, unbroken electrical ground. This g...

11 INDOORTHERMOSTAT DISCONNECTPER NEC FROMPOWERSOURCE RETURNAIR TOP COVER POWER ENTRY CONTROL ENTRY A09091 Fig. 11 -- Typical Installation GROUND SCREW (IN SPLICE BOX) YEL BLK GROUND LEAD SINGLE-PHASE CONNECTIONS TO DISCONNECT PER NEC LEGEND NEC – National Electrical Code Field Wiring Splice Connect...

12 NOTE : Mis--wiring OAT inputs will not cause damage to either Infinity control or thermistor. If the thermistor is wired incorrectly,no reading will appear at UI. Re--wire thermistor correctly fornormal operation. C. Humidifier Connections The fan coil control board terminal marked HUM is provide...

13 PRE--START--UP FIRE, EXPLOSION, ELECTRICAL SHOCK AND ENVIRONMENTAL HAZARD Failure to follow this warning could result in personal injury or death and/or property damage. 1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system. 2. Do not oper...

17 STATUS CODE 36, HEATER OUTPUT NOT SENSED WHENENERGIZEDFan coil control is provided with circuitry to detect presence of a24--vac signal on electric heater stage 1 and stage 2 outputs.If fan coil control energizes either heater stage and does not detect the 24--vac signal on output, Status Code 36...

18 Table 2 – Heat Pump/Air Conditioner Board Status Codes OPERATION FAULT AMBER LED FLASH CODE POSSIBLE CAUSE AND ACTION Standby – no call for unit opera- tion None On solid, no flash Normal operation. Emergency Mode Standard Ther- mostat Control Rapid, con- tinuous flashing Unit being controlled by...

20 QUIET SHIFTQuiet Shift is a field--selectable defrost mode which may eliminate occasional noise that could be heard at the start of the defrost cycleand restarting of the heating cycle. This feature must be enabled at the UI. When activated, the following sequence of operation will occur. Reversi...

22 Table 3 – Wet Coil Pressure Drop (in. wc) UNIT SIZE STANDARD CFM (SCFM) 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 24 0.005 0.007 0.010 0.012 0.015 – – – – – – – – – – – 30 – 0.007 0.010 0.012 0.015 0.018 0.021 0.024 – – – – – – – – 36 – – – 0.019 0.023 0.027 0.03...

23 Step 1 — Air Filter IMPORTANT : Never operate the unit without a suitable air filter in the return--air duct system. Always replace the filter with thesame dimensional size and type as originally installed. See Table 1for recommended filter sizes.Inspect air filter(s) at least once each month and...

24 Step 9 — Pressure Switches Pressure switches are protective devices integrated into the controlcircuit (low voltage). They shut off compressor if abnormally high or low pressures are present in the refrigeration circuit. These pressure switches are specifically designed to operate with Puron(R--4...

25 cylinder in upright position and a commercial metering device inmanifold hose. Charge refrigerant into suction line. TROUBLESHOOTING LED DESCRIPTIONLEDs built into Infinity control boards provide installer or service person information concerning operation and/or fault condition of the unit contr...

26 COMPRESSOR INTERNAL RELIEFThe compressor is protected by an internal pressure relief (IPR) which relieves discharge gas into compressor shell whendifferential between suction and discharge pressures exceeds 550 -- 625 psi. The compressor is also protected by an internal overload attached to motor...

27 HEAT PUMP WITH PURON REFRIGERATION SECTION QUICK--REFERENCE GUIDE Puron refrigerant operates at 50--70 percent higher pressures than R--22. Be sure that servicing equipment and replacement components are designed to operate with Puron. Puron refrigerant cylinders are rose colored. S Puron refrige...

28 Table 7 – Troubleshooting Chart SYMPTOM CAUSE REMEDY Compressor and outdoor fan will not start Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, HP/AC control board, or high--pressure, loss--of--charge or...