Carrier INFINITY 50XT-A Manuel d'instructions Page 1

150XT---AInfinityt 15 SEER Single---Packaged Heat P umpSystem With Puron®(R---410A) RefrigerantSingle Phase2 t o 5 N o m i n a l To n s ( S i z e s 2

10Table 1 – Physical Data -- Unit 50XT--AUNIT SIZE 24 30 36 42 48 60NOMINAL CAPACITY t on 2 2-- 1/2 3 3-- 1/2 4 5SHIPPING WEIGHT (lb)(kg)4351974652115

11INDOORTHERMOSTATDISCONNECTPER NECFROMPOWERSOURCERETURNAIRTOP COVERPOWER ENTRYCONTROL ENTRYA09091Fig. 11 -- Typical InstallationGROUND SCREW(IN SPLIC

12NOTE: Mis--wiring OAT inputs will not cause damage to eitherInfinity control or thermistor. If the thermistor is wired incorrectly ,no reading will

13PRE--START--UPFIRE, EXPLOSION, ELECTRICAL SHOCK ANDENVIRONMENTAL HAZARDFailure to follow this warning could result in personalinjury or death and/or

14LLSLiquid Line SolenoidUTILITY RELAY *UTILITY SIGNALOPEN RELAY* SUPPLIED BY UTILITY PROVIDERA05247Fig. 16 -- 2--Stage HP/AC Control BoardB. Control

15A09092Fig. 17 -- Wiring Schematic--50XT--A Single Phase50XT--A

16MOTOR T URNS SLOWLY1. Low static pressure loading of blower while access panel isremoved will cause blower to run slowly. Particularly at lowairflow

17STATUS CODE 3 6, HEATER OUTPUT NOT SENSED WHENENERGIZEDFan coil control is provided with circuitry to detect presence of a24--vac signal on electric

18Table 2 – Heat Pump/Air Conditioner Board Status CodesOPERATIONFAUL TAMBERLEDFLASHCODEPOSSIBLE CAUSE AND ACTIONStandby – no call for unit opera-tion

19Fig. 14, 16 and 17). This input allows a power utility device tointerrupt compressor operation during peak load periods. When theutility sends a sig

2SAFETY CONSIDERATIONSImproper installation adjustment, alteration, service, maintenance,or use can cause explosion, fire, electrical shock, or otherc

20QUIET SHIFTQuiet Shift is a field--selectable defrost mode which may eliminateoccasional noise that could be heard at the start of the defrost cycle

21A06297Fig. 18 -- Non--Communicating Emergency Cooling/Heating Wiring ConnectionsA09109Fig. 19 -- Cooling Charging Table--Subcooling50XT--A

22Table 3 – Wet Coil Pressure Drop (in. wc)UNITSIZESTANDARD CFM (SCFM)600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 210024 0.

23Step 1 — Air FilterIMPORTANT: Never operate the unit without a suitable air filterin the return--air duct system. Always replace the filter with the

24Step 9 — Pressure SwitchesPressure switches are protective devices integrated into the controlcircuit (low voltage). They shut off compressor if abn

25cylinder in upright position and a commercial metering device inmanifold hose. Char ge refrigerant into suction line.TROUBLESHOOTINGLED DESCRIPTIONL

26COMPRESSOR INTERNAL RELIEFThe compressor is protected by an internal pressure relief (IPR)which relieves discharge gas into compressor shell whendif

27HEAT PUMP WITH PURONREFRIGERATION SECTION QUICK--REFERENCE GUIDEPuron refrigerant operates at 50--70 percent higher pressures than R--22. Be sure th

28Table 7 – Troubleshooting ChartSYMPTOM CAUSE REMEDYCompressor and outdoor fanwill not startPower failure Call power companyFuse blown or circuit bre

29START--UP CHECKLIST(Remove and Store in Job Files)I. PRELIMINARY INFORMATIONMODEL NO.:SERIAL NO.:DATE:TECHNICIAN:II. PRESTART--UP (Insert check mark

3RETURN AIR SMALLBASE UNITSUPPLYAIRLARGEBASE UNITUNIT PLACEMENT ON COMMON CURBCBAFDELARGE CURBCBAFDEDashed lines show cross supportlocation for large

30Copyright 2009 Ca rrier Co rp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/09Manufacturer reserves the right to

4A09128Fig. 5 -- 50XT --A24--30 Unit Dimensions50XT--A

5A09129Fig. 6 -- 50XT --A36--60 Unit Dimensions50XT--A

6Step 3 — Pr ovide ClearancesThe required minimum service clearances are shown in Fig. 5 and6. Adequate ventilation and outdoor air must be provided.

7ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.50CY502286 2.0CAUTION - NOTICE TO RIGGERSPRUD

8CONVERTING HORIZONTAL DISCHARGE UNITS TODOWNFLOW (VERTICAL) DISCHARGE UNITSELECTRICAL SHOCK HAZARDFailure to follow this warning could result in pers

9TRAPOUTLET1-in. (25 mm) min.2-in. (51 mm) min.A09052Fig. 10 -- Condensate TrapStep 7 — Install Electrical ConnectionsELECTRICAL SHOCK HAZARDFailure t