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Carrier 48VL-E Installation Instructions Manual
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Carrier 48VL-E Installation Instructions Manual

Comfort 14 seer single-packaged air conditioner and gas furnace system with puron (r-410a) refrigerant
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48VL-(E, F)
Comfort 14 SEER Single-Packaged Air Conditioner
and Gas Furnace System with Puron® (R-410A)
Refrigerant
Single Phase 2-5 Nominal Tons (Sizes 24-60)
Three Phase 3-5 Nominal Tons (Sizes 36-60)
IMPORTANT: Effective January 1, 2015, all split system and packaged
air conditioners must be installed pursuant to applicable regional
efficiency standards issued by the Department of Energy.
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Receiving and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pre-start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Start-up Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Fig. 1 - Unit 48VL

Safety Considerations

Improper installation, adjustment, alteration, service maintenance, or use
can cause explosion, fire, electrical shock, or other conditions which
may cause death, personal injury, or property damage. Consult a
qualified installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product.
Refer to the individual instructions packaged with the kits or accessories
when installing.
Follow all safety codes. Wear safety glasses, protective clothing, and
work gloves. Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in literature and
Installation Instructions
attached to the unit. consult local building codes, the current editions of
the National Fuel Gas Code (NFGC) NFPA 54/ANSI Z223.1, and the
National Electrical Code (NEC) NFPA 70.
In Canada refer to the current editions of the National Standards of
Canada CAN/CSA-B149.1 and .2 Natural Gas and Propane Installation
codes, and Canadian Electrical Code CSA C22.1
Recognize safety information. This is the safety-alert symbol
you see this symbol on the unit and in instructions or manuals, be alert to
the potential for personal injury. Understand these signal words:
DANGER, WARNING, and CAUTION. These words are used with the
safety-alert symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING signifies
hazards which could result in personal injury or death. CAUTION is
used to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury and/or
death.
Carbon Monoxide (CO) is a colorless, odorless, and tasteless poisonous
gas that can be fatal when inhaled. Follow all installation, maintenance,
and service instructions. See additional information below regarding
the installation of a CO Alarm.
Most states in the USA and jurisdictions in Canada have laws that
require the use of Carbon Monoxide (CO) alarms with fuel burning
products. Examples of fuel burning products are furnaces, boilers, space
heaters, generators, water heaters, stoves/ranges, clothes dryers,
fireplaces, incinerators, automobiles, and other internal combustion
A170030
engines. Even if there are no laws in your jurisdiction requiring a CO
Alarm, it's highly recommended that whenever any fuel burning product
is used in or around the home or business that the dwelling be equipped
with a CO Alarm(s). The Consumer Product Safety Commission
recommends the use of CO Alarm(s). The CO Alarm(s) must be
installed, operated, and maintained according to the CO Alarm
manufacturer's instructions. For more information about Carbon
Monoxide, local laws, or to purchase a CO Alarm only, please visit the
following website
WARNING
!
https://www.kidde.com
. When

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Summary of Contents for Carrier 48VL-E

  • Page 1: Table Of Contents

    48VL-(E, F) Comfort 14 SEER Single-Packaged Air Conditioner and Gas Furnace System with Puron® (R-410A) Refrigerant Single Phase 2-5 Nominal Tons (Sizes 24-60) Three Phase 3-5 Nominal Tons (Sizes 36-60) Installation Instructions IMPORTANT: Effective January 1, 2015, all split system and packaged attached to the unit.

  • Page 2: Introduction

    48VL-(E, F): Installation Instructions Roof Curb CAUTION Install accessory roof curb in accordance with instructions shipped with curb (See Fig. 5). Install insulation, cant strips, roofing, and flashing. ELECTRICAL SHOCK HAZARD Ductwork must be attached to curb. Failure to follow this warning could result in personal injury or death. IMPORTANT: The gasketing of the unit to the roof curb is critical for a Before installing or servicing system, always turn off main power to water tight seal.
  • Page 3 48VL-(E, F): Installation Instructions ductwork, joints, and roof openings with counter flashing and mastic in WARNING accordance with applicable codes. Ducts passing through an unconditioned space must be insulated and UNIT FALLING HAZARD covered with a vapor barrier. Failure to follow this warning could result in personal injury or death. If a plenum return is used on a vertical unit, the return should be ducted Never stand beneath rigged units or lift over people.
  • Page 4 48VL-(E, F): Installation Instructions A200161 Fig. 3 – 24-36 Unit Dimensions Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 5 48VL-(E, F): Installation Instructions A200157 Fig. 4 – 42-60 Unit Dimensions Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 6 48VL-(E, F): Installation Instructions Dashed lines show cross support location for large basepan units. 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/COMMON CURB A09413...
  • Page 7 48VL-(E, F): Installation Instructions 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 8 48VL-(E, F): Installation Instructions Table 1 – Physical Data Unit Size 24060 30060 36060 42060 42090 48090 60090 NOMINAL CAPACITY (ton) 2-1/2 3-1/2 3-1/2 SHIPPING WEIGHT lb. SHIPPING WEIGHT (kg) COMPRESSOR / QUANTITY Rotary / 1 Scroll / 1 REFRIGERANT (R-410A) Quantity lb.
  • Page 9 48VL-(E, F): Installation Instructions Step 6 – Connect Condensate Drain Step 8 – Install Gas Piping NOTE: When installing condensate drain connection be sure to comply The gas supply pipe enters the unit through the access hole provided. with local codes and restrictions. The gas connection to the unit is made to the 1/2-in.
  • Page 10 48VL-(E, F): Installation Instructions Configuring Units for Downflow (Vertical) Discharge WARNING 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 install lockout tag. There may be more than one disconnect switch.
  • Page 11 48VL-(E, F): Installation Instructions Step 10 – Install Electrical Connections WARNING 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 ground may consist of an electrical wire connected to the unit ground screw in the control compartment, or conduit approved for electrical ground when installed in accordance with NFPA 70 (NEC) (latest edition) (in Canada, Canadian Electrical Code CSA C22.1) and...
  • Page 12 48VL-(E, F): Installation Instructions 3. Locate the black and yellow wires connected to the line side of the contactor (if equipped). HIGH VOLTAGE 4. Connect field L1 to black wire on connection 11 of the compressor POWER LEADS POWER contactor. (SEE UNIT WIRING SUPPLY LABEL)

  • Page 13: Pre-Start-Up

    48VL-(E, F): Installation Instructions Pre-start-up a. Make sure gas line is free of air. Before lighting the unit for the first time, perform the following with the gas valve in the OFF WARNING position: NOTE: If the gas supply pipe was not purged before connecting the unit, it will be full of air.
  • Page 14 48VL-(E, F): Installation Instructions Table 3 – Altitude Derate Multiplier for U.S.A. Derate Multiplier † Altitude ft Percent of Derate ‡ Factor 0-2000 1.00 (0-610) *. In Canada see Canadian Altitude Adjustment. †. Altitude of 2001 ft and above is not allowed. ‡.
  • Page 15 48VL-(E, F): Installation Instructions 4. Divide number of seconds in Step 3 into 3600 (number of seconds 1. Remove regulator cover screw over plastic adjustment screw on gas in one hr). valve (See Fig. 13). 5. Multiply result of Step 4 by the number of cubic feet (cu ft) shown 2.
  • Page 16 48VL-(E, F): Installation Instructions A200288 Fig. 14 – 208/230-1-60 Ultra Low NOx Connection Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 17 48VL-(E, F): Installation Instructions A200289 Fig. 15 – 208/230-1-60 Ultra Low NOx Ladder Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 18 48VL-(E, F): Installation Instructions A200290 Fig. 16 – 208/230-3-60 Ultra Low NOx Connection Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 19 48VL-(E, F): Installation Instructions A200291 Fig. 17 – 208/230-3-60 Ultra Low NOxLadder Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 20 48VL-(E, F): Installation Instructions Normal Operation Table 6 – LED Indications An LED (light-emitting diode) indicator is provided on the integrated Status Code LED Indication gas unit controller (IGC) to monitor operation. The IGC is located by Normal Operation removing the control access panel (see Fig.
  • Page 21 48VL-(E, F): Installation Instructions is more than 2°F (1.1°C) lower than required liquid line WARNING temperature. NOTE: If the problem causing the inaccurate readings is a refrigerant EXPLOSION HAZARD leak, refer to the Check for Refrigerant Leaks section. Failure to follow this warning could result in Indoor Airflow and Airflow Adjustments death, serious personal injury, and/or property CAUTION...
  • Page 22 48VL-(E, F): Installation Instructions Dehumidification Cooling Fan Speed Set-up: 2-Pin Terminal IMPORTANT: Dehumidification control must open control circuit on humidity rise above set point. Use of the dehumidification cooling fan speed requires use of either a 24 VAC dehumidistat or a thermostat which includes control of a 24 VAC dehumidistat connection.
  • Page 23 48VL-(E, F): Installation Instructions Table 8 – Cooling Charging Chart Superheat charging table is derived from optimum performance point. (95°F [35°C] outdoor ambient and (80°F [27°C] dry bulb; 67°F [19°C] wet bulb indoor condition.) Where a dash(--) appears do not attempt to check charge or charge unit under these conditions using the superheat method. (Weigh in method should be used.) A150625 To properly check or adjust charge, conditions must be favorable for subcooling charging.
  • Page 24 Table 9 – Dry Coil Air Delivery - Horizontal and Downflow Discharge Sizes 24-60 208/230VAC - 1 & 3 Phase ESP (in. W.C.) Heating Rise Allowable Unit Size Motor Speed °F (°C) Functions 0.09 0.10 0.10 0.11 † Blue Gas Heat Rise (°F) Gas Heat Rise (°C) Alternate Cooling 0.14...
  • Page 25 Table 9 – Dry Coil Air Delivery - Horizontal and Downflow Discharge Sizes 24-60 208/230VAC - 1 & 3 Phase (Continued) Heating Rise Allowable ESP (in. W.C.) Unit Size Motor Speed °F (°C) Functions 1001 0.13 0.13 0.14 0.14 0.15 0.16 0.17 0.18...
  • Page 26 Table 9 – Dry Coil Air Delivery - Horizontal and Downflow Discharge Sizes 24-60 208/230VAC - 1 & 3 Phase (Continued) Heating Rise Allowable ESP (in. W.C.) Unit Size Motor Speed °F (°C) Functions 0.09 0.10 0.10 0.11 0.12 0.12 0.13 0.14 0.14...
  • Page 27 Table 12 – Filter Pressure Drop Table (IN. W.C.) Cooling Standard CFM (SCFM) Filter Size in. (mm) Tons 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 600-1400 CFM 2.0, 12x20x1+12x20x1 2.5, 0.03 0.05 0.06 0.08 0.10 0.11 0.13...

  • Page 28: Maintenance

    48VL-(E, F): Installation Instructions Maintenance 6. Check and inspect heating section before each heating season. Clean and adjust when necessary. To ensure continuing high performance and to minimize the possibility 7. Check flue hood and remove any obstructions, if necessary. of premature equipment failure, periodic maintenance must be Air Filter performed on this equipment.
  • Page 29 48VL-(E, F): Installation Instructions season. For the first heating season, inspect blower wheel bimonthly to determine proper cleaning frequency. To inspect blower wheel, remove draft hood assembly. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove induced-draft blower assembly as follows: 1.
  • Page 30 48VL-(E, F): Installation Instructions NOTE: This is NOT recommended to perform on yearly maintenance inspections, only allowed for trouble shooting the burner box assembly for any blockage. NOTE: Burner/heat exchanger assembly BLOWER HOUSING Due to the design, and to prevent damage to components, this is considered as one assembly and cannot be disassembled.
  • Page 31 48VL-(E, F): Installation Instructions FAN GRILLE MOTOR MOTOR SHAFT A08505 MAX DISTANCE BETWEEN TOP OF FAN GRILLE AND BOTTOM OF FAN BLADE “A” Size Fig. 23 – Fan Blade Position Electrical Controls and Wiring Puron (R-410A) Items Inspect and check the electrical controls and wiring annually. Be sure to The indoor metering device is either a TXV or orifice type device turn off the electrical power to the unit.

  • Page 32: Troubleshooting

    Access My Learning Center with your HVACpartners credentials at The 24 and 30 size unit uses a single cylinder rotary compressor. This www.MLCtraining.com. Please contact us at mylearning@carrier.com compressor utilizes a rotor which is positioned eccentrically with respect with questions.
  • Page 33 48VL-(E, F): Installation Instructions Table 13 – Troubleshooting Chart SYMPTOM CAUSE REMEDY Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, or high-pressure, Replace component loss-of-charge or low-pressure switch Compressor and condenser fan will not start.
  • Page 34 48VL-(E, F): Installation Instructions Table 14 – 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 35 48VL-(E, F): Installation Instructions 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 36 48VL-(E, F): Installation Instructions © 2020 Carrier. All rights reserved. Edition Date: 06/20 Catalog No: 48VL-ULN-01SI Replaces: New Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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