50JZ 024-048 Single-Package Heat Pumps Carrier is participating in the Eurovent Certification Programme. Products are as listed in the Eurovent Directory of Certified Products.
TABLE OF CONTENTS SAFETY CONSIDERATIONS ................................................................................................................................................................... 3 INTRODUCTION ........................................................................................................................................................................................ 3 RECEIVING AND INSTALLATION ..............................................................................
NOTE TO INSTALLER: Read these instructions carefully and completely before installing this unit. Also, make sure the Owner’s Manual and Service Instructions are left with the unit after installation. SAFETY CONSIDERATIONS Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified personnel should install, repair, or service air conditioning equipment.
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Provide clearances The required minimum service clearances are shown in Figs. 1 and 2. Adequate ventilation and outdoor air must be provided. The outdoor fan draws air through the outdoor coil and discharges it through the top fan grille. Be sure that the fan discharge does not recirculate to the outdoor coil. Do not locate the unit in either a corner or under an overhead obstruction. The minimum clearance under a partial overhang (such as a normal house overhang) is 1220 mm above the unit top.
Fig. 3 - Corner weights, kg 1 2 y 4 x WARNING: Before performing service or maintenance operations on system, turn off main power to unit. Turn off accessory heater power switch if applicable. Electrical shock could cause serious injury or death. 2. 3. Open all electrical disconnects before starting any service work. Remove horizontal duct covers to access bottom return and supply knock out panels. Use a screwdriver and hammer to remove the panels in the bottom of the unit base.
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Fig. 6 - Slab mounting detail Fig. 5 - Unit levelling tolerances A OPTIONAL Optional RETURN return air AIR opening OPENING C M B OPTIONAL Optional SUPPLY supply air AIR opening OPENING A- Maximum allowable difference A-B B-C 6 mm 6 mm A-C 6 mm 50 mm 2" EVAP. COIL Evaporator COND. COIL Condenser Fig. 7 - Threading belt HANDHOLD Handhold Hook HOOK Feed FEED Fig. 8 - Suggested rigging “A” 914-137" (36"-54") 914-1371 mm “B” Detail A DETAIL A SCALE 0.
Fig. 9 - Typical installation INDOOR Indoor THERMOSTAT thermostat Return air RETURN AIR FROM From power POWER source Top cover TOP COVER SOURCE Disconnect per DISCONNECT IEC IEC* PER Fig. 10 - 50JZ with duct covers on Fig. 11 - Condensate trap mm min.MIN. 1”25(25mm) TRAP 50 mm min.
Table 1 - Physical data 50JZ 024 030 036 048 6.9 8.6 10.7 14.4 kW 7.0 8.1 10.6 13.1 kg 136 145 149 161 Nominal cooling capacity* kW Nominal heating capacity** Operating weight Compressor One scroll compressor Refrigerant Refrigerant meteringdevice Quantity Orifice, inside diameter Orifice, outside diameter kg mm mm R-410A AccuRater 3.10 1.50 0.81 4.35 1.55 1.02 4.50 1.70 1.02 5.40 1.98 1.17 Outdoor coil Rows .. fin spacing Face area mm m2 2 ... 1.5 0.8 2 ... 1.5 1.0 2 ... 1.
Table 3 - Electrical data 50JZ Power supply V-ph-Hz Voltage range V Compressor OFM IFM Electric heat RLA FLA FLA Nom. kW FLA MCA Fuse or circuit breaker, A FLA LRA 6.5 8.7 9.4 12.6 7.5 19.2 23.2 10 20 25 7 18 22 35 44 48 6.5 8.7 13.0 9.4 12.6 18.8 9.0 20.7 24.7 32.5 10 20 25 35 9 20 23 30 39 49 52 59 6.5 8.7 13.0 9.4 12.6 18.8 10.9 22.7 26.6 34.4 15 25 30 35 11 21 25 32 51 61 64 70 6.5 8.7 13.0 17.4 9.4 12.6 18.8 25.1 13.6 25.3 29.3 37.0 45.
Fig. 12 - Wiring diagram (400-3-50) Max. wire size 6 AWG Field power supply 50JZ 036 only See electric heat schematic Electric heaters Used with accessory Power Contactor electric heat option only. Used with heater options 5, 10, 15 and 20 kW. Max. wire size 2 AWG. Colour code BLK - Black BLU - Blue BRN - Brown GRA - Gray GRN - Green ORN - Orange PNK - Pink RED - Red VIO - Violet WHT - White YEL - Yellow 3.
Fig. 14 - Line power connections Fig. 13 - Control connections C GROUND Ground lug LUG SLPICE (in(IN splice box)BOX) BRN O Ground lead GROUND LEAD ORN R RED G GRN Y YEL E WHT W2 THERMOSTAT Thermostat AND andSUBBASE subbase UNIT Unit CONTROL control POWER SPLICE BOX power splice box Fig. 15 - Control wiring plate L1 BLK L2 YEL L3 BLU Note:copper Use copper wire only. NOTE: Use wire only.
Fig. 18 - Typical heat pump operation, heating mode Indoor coil Outdoor coil Bypass position LCS Accumulator HPS Compressor Metering position Legend HPS - High presure switch LCS - Loss-of-charge switch AccuRater metering device Arrow indictes direction of flow Fig.
Routing power leads into unit Use only copper wire between disconnect and unit. The highvoltage leads should be in a conduit until they enter the duct panel; conduit termination at the duct panel must be watertight. Run the high-voltage leads through the power entry knockout on the power entry side panel. See Figs. 1 and 2 for location and size. When the leads are inside the unit, run leads up the high-voltage raceway to the line wiring splice box (see Fig. 12 and 13). 3.
Checking cooling and heating control operation Start and check the unit for proper control operation as follows: 1. Place room thermostat SYSTEM switch or MODE control in OFF position. Observe that fan motor starts when FAN mode is placed in FAN ON position and shuts down after proper fan off delay, when FAN MODE switch is placed in AUTO position. 2. Place system switch or MODE control in HEAT position. Set control above room temperature. Observe that compressor, outdoor fan, and indoor fan motors start.
Table 5 - Filter pressure drop, Pa Filter size mm Air delivery, l/s 236 283 330 377 425 472 519 566 614 661 707 755 802 850 896 944 991 1038 508 x 508 508 x 610 610 x 762 12.4 - 24.9 - 29.9 22.4 - 32.3 24.9 - 34.8 27.4 - 37.3 32.3 17.4 34.8 19.9 37.4 22.4 39.9 24.9 27.4 29.9 32.3 34.8 37.3 39.8 42.3 17.4 - 19.9 - Table 6 - Accessory electric heater pressure drop, Pa Heater kW Air delivery, l/s 283 377 472 566 661 755 850 944 1038 6.5–17.4 7.5 9.2 10.4 11.
Defrost control MAINTENANCE Quiet Shift Quiet Shift is a field-selectable defrost mode, which will eliminate occasional noise that could be heard at the start of defrost cycle and restarting of heating cycle. It is selected by placing DIP switch 3 (on defrost board) in ON position. To ensure continuing high performance, and to minimise the possibility of premature equipment failure, periodic maintenance must be performed on this equipment.
Fig. 20 - Balance worksheet Balance Point point Workshe et - Metri c 16 Based tering En air temperature Air of 21d C. Rated an Based onon an Indoor indoor entering of 21°C and CFM nominal air flow. 14 Unit heating capacity, kW 12 10 24 30 36 48 8 6 4 2 0 -30 -25 -20 -15 -10 -5 0 5 10 15 Outdoor Air air Temp. (Deg C)°C Outdoor temperature, Fig.
Indoor fan and motor Electrical controls and wiring NOTE: All motors are pre-lubricated. Do not attempt to lubricate these motors. Inspect and check the electrical controls and wiring annually. Be sure to turn off the electrical power to the unit and install lockout tag. For longer life, operating economy, and continuing efficiency, clean accumulated dirt and grease from the fan wheel and motor annually.
Fig. 22 - Refrigerant circuit Fig. 23 - Phase monitor control and LED indicators Contactor 24 V COM OFF: No 24 V ac ON: OK Flash: Phase problem Fig.
Loss-of-charge switch This switch is located on the liquid line and protects against low suction pressures caused by such events as loss of charge, low air flow across indoor coil, dirty filters, etc. It opens on a pressure drop at about 138 kPa. If system pressure is above this, switch should be closed. To check switch: 1. Turn off all power to unit and install lockout tag. 2. Disconnect leads on switch. 3. Apply ohmmeter leads across switch. You should have continuity on a good switch.
High flow valves Located on the compressor hot gas and suction tubes are high flow valves. Large black plastic caps distinguish these valves with O-rings located inside the caps. These valves cannot be accessed for service in the field. Ensure the plastic caps are in place and tight or the possibility of leakage could occur. System information Phase monitor control 1. 3-phase scroll compressors are rotational sensitive 2. A flashing LED on phase monitor (Fig. 23) indicates reverse rotation. 3.
Table 9 - Troubleshooting chart Symptom Cause Compressor and outdoor fan will not start Power Failure Fuse blown or circuit breaker tripped Defective thermostat, contactor, transformer, control relay, defrost board, or high-pressure or loss-of-charge/low pressure switch Insufficient line voltage Incorrect or faulty wiring Thermostat setting too high Units have a 5-minute time delay Phase monitor Compressor will not start but condenser fan runs Faulty wiring or loose connections in compressor circuit Co
START-UP CHECKLIST (REMOVE AND STORE IN JOB FILE) I. PRELIMINARY INFORMATION Model No. Serial No. Date Technician _____________________________________ _____________________________________ _____________________________________ _____________________________________ II. PRE-START-UP ____ ____ ____ ____ ____ ____ ____ Verify that all packing materials have been removed from unit. Remove all shipping hold down bolts and brackets per installation instructions.
Order No: 15017-20, 02.2006 - Supersedes order No: New Manufacturer reserves the right to change any product specifications without notice. Manufacturer: Carrier Corporation, Indianapolis, USA. Printed in the Netherlands on chlorine-free paper.
