Carrier 24ACB7 Performance Installation Instructions Manual

Performance series air conditioner with puron refrigerant 2 to 5 nominal tons
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24ACB7
Performancet Series Air Conditioner
with Puronr Refrigerant
2 To 5 Nominal Tons

SAFETY CONSIDERATIONS

NOTE: Read the entire instruction manual before starting the
installation.
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. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes and
current editions of the National Electrical Code ( NEC ) NFPA 70.
In Canada, refer to current editions of the Canadian electrical code
CSA 22.1.
Recognize safety information. This is the safety- -alert symbol
When 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 would 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.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
WARNING
!
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors.
mixtures of air or gases containing
oxygen can lead to an explosion.

Installation Instructions

Pressurized

INSTALLATION RECOMMENDATIONS

NOTE: In some cases noise in the living area has been traced to
gas pulsations from improper installation of equipment.
1. Locate unit away from windows, patios, decks, etc. where
unit operation sound may disturb customer.
2. Ensure that vapor and liquid tube diameters are appropriate
for unit capacity.
3. Run refrigerant tubes as directly as possible by avoiding un-
necessary turns and bends.
4. Leave some slack between structure and unit to absorb vi-
bration.
5. When passing refrigerant tubes through the wall, seal open-
ing with RTV or other pliable silicon- -based caulk. (See Fig.
1.)
6. Avoid direct tubing contact with water pipes, duct work,
floor joists, wall studs, floors, and walls.
7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap which comes in direct contact with
tubing.(See Fig. 1.)
8. Ensure that tubing insulation is pliable and completely sur-
rounds vapor tube.
9. When necessary, use hanger straps which are 1 in. (25.4
mm) wide and conform to shape of tubing insulation. (See
Fig. 1.)
10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.
NOTE:
Avoid contact between tubing and structure
OUTDOOR WALL
CAULK
INSULATION
THROUGH THE WALL
HANGER STRAP
(AROUND VAPOR
TUBE ONLY)
1" (25.4 mm) MIN.
SUSPENSION
Fig. 1 - - Piping Installation
The outdoor unit contains system refrigerant charge for operation
with AHRI rated indoor unit when connected by 15 ft. (4.57 m) of
field- -supplied or factory accessory tubing. For proper unit
operation, check refrigerant charge using charging information
located on control box cover and/or in the Check Charge section of
this instruction.
INDOOR WALL
LIQUID TUBE
VAPOR TUBE
JOIST
INSULATION
VAPOR TUBE
LIQUID TUBE
A94026

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Summary of Contents for Carrier 24ACB7 Performance

  • Page 1: Installation Instructions

    24ACB7 Performancet Series Air Conditioner with Puronr Refrigerant 2 To 5 Nominal Tons Installation Instructions SAFETY CONSIDERATIONS INSTALLATION RECOMMENDATIONS NOTE: Read the entire instruction manual before starting the NOTE: In some cases noise in the living area has been traced to installation.
  • Page 2: Installation

    IMPORTANT: Maximum liquid- -line size is 3/8- -in. OD for all NOTE: Units operating at high stage operation, 208v (or below) residential applications including long line. line voltage and at an outdoor ambient of 120_F (or greater), may experience compressor trip. IMPORTANT: Always install the factory- -supplied liquid- -line filter drier.
  • Page 3 Outdoor Unit Connected to Factory Approved Indoor Unit Outdoor unit contains correct system refrigerant charge for operation with factory approved ARI rated indoor unit when connected by 15 ft. (4.57 m) of field- -supplied or factory- -accessory tubing, and factory supplied filter drier. Check refrigerant charge for maximum efficiency.
  • Page 4 Table 2 – Accessory Usage Required for Low Ambient Required for Sea Coast Required for Long Line Accessory Cooling Applications Applications Applications* (Below 55° F / 12.8° C) (within 2 miles/3.2 km) Compressor Start Assist Capacitor and Relay Crankcase Heater Yes (standard on some units) Yes (standard on some units) Evaporator Freeze Thermostat...
  • Page 5: System Functions And Sequence Of Operation

    Airflow Selection for Variable Speed Furnaces SYSTEM FUNCTIONS AND SEQUENCE OF OPERATION The variable speed furnaces provide blower operation to match the capacities of the compressor during high and low stage cooling The 24ACB7 models utilize a 2-stage cooling indoor thermostat. operation.
  • Page 6: Troubleshooting

    Check Charge TROUBLESHOOTING The 24ACB7 units may be charged in high- - or low- -stage If the compressor fails to operate with a cooling call, the table compressor operation. Factory charge amount and desired below (Resistance table) can be used to verify if there is any subcooling are shown on unit rating plate.
  • Page 7: Major Components

    MAJOR COMPONENTS CARE AND MAINTENANCE 2- - Stage Compressor For continuing high performance and to minimize possible equipment failure, periodic maintenance must be performed on this The 2- -stage compressor contains motor windings that provide equipment. 2- -pole (3500 RPM) operation. Frequency of maintenance may vary depending upon geographic Compressor Internal Relief areas, such as coastal applications.
  • Page 8 TWO-STAGE Two-Stage Variable Speed THERMIDISTAT AIR CONDITIONER Air Conditioner Fan Coil Thermidistat RVS/Heat Stage 2 O/W2/B Heat Stage 1 W/W1 REMOVE J2 JUMPER FOR Compressor Low HEAT STAGING Compressor High Y/Y2 Y/Y2 24VAC Hot Heating REMOVE J1 FOR 24VAC Hot Cooling DEHUMIDIFY MODES Dry Contact 1...
  • Page 9 PURONR (R- -410A) REFRIGERANT QUICK REFERENCE GUIDE S Puron refrigerant operates at 50- -70 percent higher pressures than R- -22. Be sure that servicing equipment and replacement components are designed to operate with Puron refrigerant S Puron refrigerant cylinders are rose colored. S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
  • Page 10 Catalog No: 24ACB7---3SI Copyright 2013 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 03/13 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: 24ACB7--- 2SI...

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