Carrier 48EZ(N) - A Installation Instructions Manual
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Carrier 48EZ(N) - A Installation Instructions Manual

Carrier 48EZ(N) - A Installation Instructions Manual

48ez(n)-a series comfort 13 seer single packaged hybrid heat dual fuel system with puron r (r-410a) refrigerant single and three phase 2-5 nominal tons (sizes 24-60)
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See also: Instruction and Installation Manual
48EZ(N) ---A
Comfortt 13 SEER Single ---Packaged HYBRID HEAT®
Dual Fuel System with Puronr (R ---410A) Refrigerant
Single And Three Phase
2---5 Nominal Tons (Sizes 24---60)
NOTE:
Read the entire instruction manual before starting the
installation.
NOTE:
Installer: Make sure the Owner's Manual and Service
Instructions are left with the unit after installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS
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Installation Instructions
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SAFETY CONSIDERATIONS
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Installation and servicing of this equipment can be hazardous due
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to mechanical and electrical components. Only trained and
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qualified personnel should install, repair, or service this equipment.
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Untrained personnel can perform basic maintenance functions such
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as cleaning and replacing air filters. All other operations must be
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performed by trained service personnel. When working on this
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equipment, observe precautions in the literature, on tags, and on
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labels attached to or shipped with the unit and other safety
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precautions that may apply.
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Follow all safety codes. Wear safety glasses, protective clothing,
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and work gloves. Have fire extinguisher available. Read these
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instructions thoroughly and follow all warnings or cautions
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included in literature and
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building codes, the current editions of the National Fuel Gas Code
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(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code
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(NEC) NFPA 70.
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In Canada refer to the current editions of the National Standards of
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Canada CAN/CSA- -B149.1 and .2 Natural Gas and Propane
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Installation codes, and Canadian Electrical Code CSA C22.1.
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Recognize safety information. This is the safety- -alert symbol
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury. Understand these
signal words: DANGER, WARNING, and CAUTION. These
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Fig. 1 - - Unit 48EZ- -A
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  • Page 1: Table Of Contents

    48EZ(N) ---A Comfortt 13 SEER Single ---Packaged HYBRID HEAT® Dual Fuel System with Puronr (R ---410A) Refrigerant Single And Three Phase 2---5 Nominal Tons (Sizes 24---60) Installation Instructions NOTE: Read the entire instruction manual before starting the installation. NOTE: Installer: Make sure the Owner’s Manual and Service Instructions are left with the unit after installation.

  • Page 2: Introduction

    words are used with the safety- -alert symbol. DANGER identifies Manufacturer is not responsible for any damage incurred in transit. the most serious hazards which will result in severe personal injury Check all items against shipping list. Immediately notify the or death.
  • Page 3 A09450 Fig. 2 - - 48EZ- -A24- -36 Unit Dimensions...
  • Page 4 A09451 Fig. 3 - - 48EZ- -A42- -60 Unit Dimensions...
  • Page 5 HVAC unit HVAC unit basepan base rails Sealing Gasket Roofcurb Anchor screw Wood nailer* Flashing field supplied Roofcurb* Insulation (field supplied) Roofing material field supplied Cant strip field supplied SMALL CURB A09418 *Provided with roofcurb A09090 ROOF CURB DETAIL LARGE CURB A09415 A09419 CATALOG...

  • Page 6: Provide Clearances

    CAUTION - NOTICE TO RIGGERS PRUDENCE - AVIS AUX MANIPULATEUR ACCESS PANELS MUST BE IN PLACE WHEN RIGGING. PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION. Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition DUCTS MINIMUM HEIGHT: 36"...

  • Page 7: Connect Condensate Drain

    Inspection TRAP OUTLET Prior to initial use, and at monthly intervals, all rigging shackles, clevis pins, and straps should be visually inspected for any 1-in. (25 mm) min. damage, evidence of wear, structural deformation, or cracks. Particular attention should be paid to excessive wear at hoist hooking points and load support areas.
  • Page 8 A 1/8- -in. (3.2 mm) NPT plugged tapping, accessible for test gauge WARNING connection, must be installed immediately upstream of the gas supply connection to the gas valve. When installing the gas supply line, observe local codes pertaining FIRE OR EXPLOSION HAZARD to gas pipe installations.
  • Page 9 Table 1 – Physical Data - - Unit 48EZ- -A UNIT SIZE 48EZ --- A 24040 24060 30040 30060 36060 36090 42060 42090 NOMINAL CAPACITY --- ton 2 ---1/2 2 ---1/2 3 ---1/2 3 ---1/2 SHIPPING WEIGHT --- lb. (kg) COMPRESSORS Scroll Quantity...
  • Page 10 Table 1 - - Physical Data - - Unit 48EZ- -A (Cont’d) UNIT SIZE 48EZ --- A 48090 48115 48130 60090 60115 60130 NOMINAL CAPACITY --- ton OPERATING WEIGHT--- lb (kg) COMPRESSORS Scroll Quantity REFRIGERANT (R --- 410A) Quantity --- lb 12.3 (kg ) REFRIGERANT METERING DEVICE...

  • Page 11: Install Duct Connections

    Step 9 — Install Duct Connections CAUTION The unit has duct flanges on the supply- - and return- -air openings on the side and bottom of the unit. For downshot applications, the PROPERTY DAMAGE HAZARD ductwork connects to the roof curb (See Fig. 2 and 3 for connection sizes and locations).
  • Page 12 Return Duct Panels Horizontal Duct Covers A09061 Basepan Downflow (Vertical) Basepan Supply Downflow Knockout (Vertical) Supply Duct Panels Return Knockout A09060 Fig. 8 - - Supply and Return Duct Opening Return & Supply Duct Panels from Underside of Base (Alternate Method) A09420 Fig.

  • Page 13: Install Electrical Connections

    Step 10 — Install Electrical Connections Single phase units: 1. Run the high- -voltage (L1, L2) and ground lead into the WARNING control box. 2. Connect ground lead to chassis ground connection. ELECTRICAL SHOCK HAZARD 3. Locate the black and yellow wires connected to the line side of the contactor.

  • Page 14: Balance Point Setting Thermidistat Or Hybrid Heat Thermostat

    PRE- - START- -UP HIGH VOLTAGE WARNING POWER LEADS POWER (SEE UNIT WIRING SUPPLY LABEL) FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, EQUIP GR death or property damage. FIELD-SUPPLIED FUSED DISCONNECT 1. Follow recognized safety practices and wear protective CONTROL BOX goggles when checking or servicing refrigerant system.

  • Page 15: Check For Refrigerant Leaks

    4. Verify the following conditions: de- -energized. The evaporator motor is de- -ener- gized after a 90 sec. delay. a. Make sure gas line is free of air. Before lighting the unit for the first time, perform the following with the gas d.

  • Page 16: Checking Heating Control

    Table 4 – Altitude Derate Multiplier for U.S.A.* BURNER FLAME DERATE MULTIPLIER ALTITUDE FT (M) PERCENT OF DERATE FACTOR{ 0--- 2000 BURNER 1.00 (0--- 610) 2001--- 3000* 8--- 12 0.90 (610--- 914) 3001--- 4000 12--- 16 0.86 (315--- 1219) 4001--- 5000 16--- 20 0.82 (1220--- 1524)

  • Page 17: Check Burner Flame

    4. Divide number of seconds in Step 3 into 3600 (number of the same for each burner. Propane will have blue flame (See Fig. seconds in one hr). 12). Refer to the Maintenance section for information on burner removal. 5. Multiply result of Step 4 by the number of cubic feet (cu ft) Normal Operation shown for one revolution of test dial to obtain cubic feet (cu ft) of gas flow per hour.

  • Page 18: Start- -Up Cooling And Make Adjustments

    Step 4 — Start- -up Cooling and Make Adjust- Proceed as follows: ments 1. Remove caps from low- - and high- -pressure service fittings. 2. Using hoses with valve core depressors, attach low- - and Complete the required procedures given in the Pre- -Start- -Up high- -pressure gauge hoses to low- - and high- -pressure section before starting the unit.
  • Page 19 Gas Heating Fan Speed Set-up 5. Remove the vinyl cap off of the desired speed tap wire (Refer to Table 6 for color coding) for the dehumidification To change the gas heating speed: cooling fan speed and place desired speed tap wire on the 1.
  • Page 20 Table 7 – Filter Pressure Drop Table (IN. W.C.) FILTER SIZE in. (mm) 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 20X20X1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 — — — —...
  • Page 21 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 48EZ- -A24- -60 EXTERNAL STATIC PRESSURE (in. W.C.) HEATING MOTOR WIRE UNIT RISE RANGE SPEED COLOR --- --- --- --- --- --- --- --- --- --- Heating...
  • Page 22 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 48EZ- -A24- -60 EXTERNAL STATIC PRESSURE (in. W.C.) HEATING MOTOR WIRE UNIT RISE RANGE SPEED COLOR 1234 1168 1093 1021 Heating Blue Rise ( Heating Rise (...
  • Page 23 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 48EZ- -A24- -60 EXTERNAL STATIC PRESSURE (in. W.C.) HEATING MOTOR WIRE UNIT RISE RANGE SPEED COLOR 1402 1351 1311 1263 1224 1172 1136 1080 1041...
  • Page 24 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 48EZ- -A24- -60 EXTERNAL STATIC PRESSURE (in. W.C.) HEATING MOTOR WIRE UNIT RISE RANGE SPEED COLOR 1445 1389 1341 1281 1236 1189 1139 1072 1027...
  • Page 25 A09068 Fig. 15 - - 208/230- -1- -60 Wiring Diagram, Unit 48EZ- -A...
  • Page 26 A09209 Fig. 16 - - 208/230- -3- -60 Wiring Diagram, Unit 48EZ- -A...
  • Page 27 A08019 Fig. 17 - - Cooling Charging Table- -Subcooling...

  • Page 28: Maintenance

    MAINTENANCE 3. Inspect blower motor and wheel for cleanliness at the beginning of each heating and cooling season. Clean when To ensure continuing high performance and to minimize the necessary. For first heating and cooling season, inspect possibility of premature equipment failure, periodic maintenance blower wheel bi- -monthly to determine proper cleaning must be performed on this equipment.

  • Page 29: Flue Gas Passageways

    f. Connect 5 pin plug and 4 pin plug to indoor blower 1. Remove the induced draft blower assembly according to motor. directions in the Induced Draft Blower Assembly section. g. Reinstall blower access panel (see Fig. 19). 2. Remove the 11 screws holding the flue collector box cover (See Fig.

  • Page 30: Outdoor Fan

    BLOWER HOUSING 2 SETSCREWS A07680 (HIDDEN) Fig. 23 - - Burner Rack Removed Outdoor Fan CAUTION UNIT OPERATION HAZARD C99085 Failure to follow this caution may result in damage to unit Fig. 20 - - Removal of Motor and Blower Wheel components.

  • Page 31: Gas Input

    Speedup Quiet Defrost interval Pins Shift DIP switches A08020 Fig. 24 - - Defrost Control the Indoor Airflow and Airflow Adjustments section to check the WARNING system airflow. Check Defrost Thermostat EXPLOSION, PERSONAL INJURY The defrost thermostat is usually located on the lowest liquid ENVIRONMENTAL HAZARD leaving circuit of the left condenser coil (see Fig.
  • Page 32 C99097 Fig. 25 - - Refrigerant Circuit 2. Disconnect leads on switch. The compressor is an electrical (as well as mechanical) device. Exercise extreme caution when working near compressors. Power 3. Apply ohm meter leads across switch. You should have should be shut off, if possible, for most troubleshooting techniques.
  • Page 33 INDOOR COIL OUTDOOR COIL TXV in Metering Position HP S Bypass LEGEND Position HPS – High Pressure Switch LCS – Loss of Charge Switch Accurater Metering De vice ® Arrow indicates direction of flo w C03011 Fig. 26 - - Typical Heat Pump Operation, Cooling Mode INDOOR COIL OUTDOOR COIL TXV in Bypass...

  • Page 34: Troubleshooting

    Servicing Systems on Roofs and with Synthetic materials Liquid Line Filter Drier POE (polyolester) compressor lubricants are known to cause long This filter drier is specifically designed to operate with Puron. Use term damage to some synthetic roofing materials. only factory- -authorized components. Filter drier must be replaced whenever the refrigerant system is opened.
  • Page 35 Table 11 – Troubleshooting Guide - - Cooling or Heat Pump Heating Mode SYMPTOM CAUSE REMEDY Power Failure Call power company. Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or control Compressor and Outdoor fan will not Replace component.
  • Page 36 Table 12 – Troubleshooting Guide–Heating SYMPTOM CAUSE REMEDY Water in gas line Drain. Install drip leg. No power to furnace Check power supply fuses, wiring or circuit breaker. Check transformer. No 24--v power supply to control circuit NOTE: Some transformers have internal over--current protection that requires a cool--down period to reset.
  • Page 37 START- -UP CHECKLIST (Remove and Store in Job Files) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRESTART- -UP (Insert check mark in box as each item is completed) ( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT ( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS ( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS ( ) CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE)
  • Page 38 Catalog No: 48EZ---06SI Copyright 2009 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 08/09 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: 48EZ--- 05SI...

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