Carrier 48JZ (N) 024-060 Operations Instructions

48JZ(N) 024-060Single Packaged Gas Heating/Electric Heat PumpUnits With Puron® (R-410A) RefrigerantInstallation, Start-Up, and Operating InstructionsN

7. After completing unit conversion, perform all safety checksand power up unit.NOTE: The design and installation of the duct system must be inaccorda

3. Locate the black and yellow wires connected to the line sideof the contactor.4. Connect L1 to black wire on connection 11 of the compressorcontacto

PRE-START-UPFailure to observe the following warnings could result inserious injury or death:1. Follow recognized safety practices and wear protective

f. Make sure that all tools and miscellaneous loose parts havebeen removed.5. Compressors are internally spring mounted. Do not loosen orremove compre

natural gas with a heating value of 1050 Btu/ft3at 0.65 specificgravity, or propane gas with a heating value of 2500 Btu/ft3at1.5 specific gravity.• F

• When the gas supply being used has a different heating value orspecific gravity, refer to national and local codes, or contactyour distributor to de

Fig. 17—208/230-1-60 ICM FIOP Wiring Diagram, Unit 48JZC0110116

These units are designed to consume the rated gas inputsusing the fixed orifices at specified manifold pressures asshown in Table 5. DO NOT RE-DRILL T

AIRFLOW AND TEMPERATURE RISEThe heating section for each size unit is designed and approved forheating operation within the temperature-rise range sta

Step 3—START-UP COOLING AND MAKE ADJUST-MENTSComplete the required procedures given in the Pre-Start-Upsection before starting the unit.Do not jumper

Improper installation, adjustment, alteration, service, mainte-nance, or use can cause carbon monoxide poisoning, fire, oran explosion which can resul

EXAMPLE: (Fig. 20)Outdoor Temperature...85 FSuction Pressure...145 psigSuction Temperature should be...70 F(Suction Temperature may vary +/– 3°F)

Failure to follow these warnings could result in serious injuryor death:1. First, turn off gas supply to the unit. Then turn off electricalpower and i

wheel bi-monthly to determine proper cleaning frequency.4. Check electrical connections for tightness and controls forproper operation each heating an

c. On all units, remove blower assembly from unit. Removescrews securing blower to blower partition and slideassembly out. Be careful not to tear insu

e. Reassemble motor into housing. Be sure setscrews aretightened on motor shaft flats and not on round part ofshaft.f. Reinstall blower panel and unit

3. Slide the motor and blower wheel assembly out of the blowerhousing (See Fig. 28). Clean the blower wheel. If additionalcleaning is required, contin

heating cycle and one complete cooling cycle to ensure properoperation. If discrepancies are observed in either or both operatingcycles, or if a suspe

3. Restart unit in Heating mode, allowing frost to accumulate onoutdoor coil.4. After a few minutes in Heating mode, liquid line temperatureshould dro

Wear safety glasses and gloves when handling refrigerants.Keep torches and other ignition sources away from refriger-ants and oils. Failure to follow

HEAT PUMP WITH PURON—QUICK REFERENCE GUIDEPuron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and

Step 3—FIELD FABRICATE DUCTWORKSecure all ducts to roof curb and building structure on verticaldischarge units. Do not connect ductwork to unit. For h

Table 11—Troubleshooting Guide—CoolingSYMPTOM CAUSE REMEDYCompressor and outdoor fanwill not start.Power Failure Call power company.Fuse blown or circ

Table 12—Troubleshooting Guide–HeatingSYMPTOM CAUSE REMEDYBurners will not ignite.Water in gas line Drain. Install drip leg.No power to furnace Check

Table 13—Troubleshooting Guide–LED Error CodesSYMPTOM CAUSE REMEDYHardware failure.(LED OFF)Loss of power to control module (IGC)*.Check 5-amp fuse on

START-UP CHECKLIST(Remove and Store in Job File)I. PRELIMINARY INFORMATIONMODEL NO: ...

Copyright 2001 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 48JZ1siManufacturer reserves the right to discontinue, or change at any tim

Step 4—PROVIDE CLEARANCESThe required minimum operating and service clearances are shownin Fig. 2 and 3. Adequate combustion, ventilation and outdoor

Do not restrict outdoor coil airflow. An air restriction at eitherthe outdoor-air inlet or the fan discharge can be detrimental tocompressor life.The

Step 5—RIG AND PLACE UNITWhen installing the unit on a rooftop, be sure the roof willsupport the additional weight.Use spreader bars or crate top when

screw holes in vent cap with holes in the flue panel.3. Secure flue hood to flue panel by inserting a single screw onthe right side and the left side

5. Install an accessible, external, manual main shutoff valve ingas supply pipe within 6 ft of heating section.6. Install ground-joint union close to

Unstable operation may occur when the gas valve andmanifold assembly are forced out of position while connect-ing improperly-routed rigid gas piping t