Carrier 24ACR342A003 Installation Guide

Installation Instructions

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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. 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

National Electrical Code (NEC) for special requirements.

Recognize safety information. This is the safety-alert symbol A',
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 win 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.

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.

NOTEAvoid contact between tubing and structure

__/<OUTOOORINDOORwALW

CAU LI4-_TI_I,-.- LIQUID TUBE

_1N SULATI_ VAPOR TUBE

THROUGH THE WALL

HANGER STRAP _ I

AROUND VAPOR _._ ,NSULAT,ON

TUBE_I_VAPO R_ TUBE

1 I__'--J°lsT

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 nmst be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.

INSTALLATION INSTRUCTIONS

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.)

1" (25.4 mm) MIN. _1 I_ 't_._LIQUIDTUB E

SUSPENSION

A94026

Fig. 1 - Piping Installation

The outdoor unit contains system refrigerant charge for operation
with ARI 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.
IMPORTANT: Maximum liquid-line size is 3/8-in. OD for all

residential applications including long line.

IMPORTANT: Always install the factory-supplied liquid-line
filter drier. If replacing the filter drier, refer to Product Data Digest

for appropriate part number. Obtain replacement filter driers from
your distributor or branch.

INSTALLATION

Check Equipment and Job Site

UNPACK UNIT
Move to final location. Remove carton taking care not to damage

unit.
Inspect Equipment

File claim with shipping company prior to installation if shipment
is damaged or incomplete. Locate unit rating plate on unit corner

panel. It contains information needed to properly install unit.
Check rating plate to be sure unit matches job specifications.

Install on a Solid, Level Mounting Pad

If conditions or local codes require tire unit be attached to pad, tie
down bolts should be used and fastened through knockouts

provided in unit base pan. Refer to unit mounting pattern in Fig. 2
to determine base pan size and knockout hole location.
For hurricane tie downs, contact local distributor for details and PE

(Professional Engineer) certification, if required by local
authorities.

On rooftop applications, mount on level platform or frame. Place
unit above a load-bearing wall and isolate unit and tubing set from
structure. Arrange supporting members to adequately support unit

and minimize transmission of vibration to building. Consult local
codes governing rooftop applications.

Roof mounted units exposed to winds may require wind baffles.
Consult the Application Guideline and Service Manual -

Residential Split System Air Conditioners and Heat Pumps for
wind baffle construction.

NOTE: Unit must be level to within .+2° (-+3/8 in./ft.) per
compressor manufacturer specifications.

Clearance Requirements

When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 24 in. (609.6 mm)

clearance to service end of unit and 48 in. (1219.2 mm) (above
unit. For proper airflow, a 6-in. (152.4 mm) clearance on 1 side of

unit and 12-in. (304.8 mm) on all remaining sides must be
maintained. Maintain a distance of 24 in. (609.6 mm) between

units. Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.

On rooftop applications, locate unit at least 6 in. (152.4 mm) above
roof surface.

Operating Ambient

The minimum outdoor operating ambient in cooling mode without
accessory is 55 °F (12.78 °C), and the maximum outdoor

operating ambient in cooling mode is 125 °F (51.67 °C).

Make Piping Connections

PERSONAL INJURY AND ENVIRONMENTAL
HAZARD

Failure to follow this warning could result in personal injury
or death.

Relieve pressure and recover all refrigerant before system
repair or final unit disposal. Use all service ports and open
all flow-control devices, including solenoid valves.

Federal regulations require that you do not vent refrigerant
to the atmosphere. Recover during system repair or final
unit disposal.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

If ANY refrigerant tubing is buried, provide a 6-in. vertical
rise at service valve. Refrigerant tubing lengths up to 36-in.

may be buried without further special consideration. Do not
bury lines more than 36-in. (914.4 mm).

3/8-in. (9.53 mm) Dia.
Tiedown Knockouts in

Basepan(2) PEaces

View From Top

UNIT BASE PAN TIEDOWN KNOCKOUT LOCATIONSin. (ram)

Dimension A B C

28X28 9 1/8(231.8) 4 7/18(112.7) 21 1/4(539.8)

31 1/2X31 1/2 9 1/8(231,8) 8 9/18(166,7) 24 11/16(627,1)

35 X35 9 1/8 (231,8) e 9/16 (166,7) 28 7/16 (722.3)

A05177

Fig. 2 - Tiedown Knockout Locations

Outdoor units may be connected to indoor section using accessory

tubing package or field-supplied refrigerant grade tubing of correct

size and condition. Rated tubing diameters shown in Table 1 are
recommended up to 80 ft. (24.38 m). See Product Data for

acceptable alternate vapor diameters and associated capacity losses.

For tubing requirements beyond 80 ft. (24.38 m), substantial
capacity and performance losses can occur. Following the

recommendations in the Longline Guideline will reduce these

losses. Refer to Table 1 for field tubing diameters. Refer to Table 2

for accessory requirements.
There are no buried-line applications greater than 36-in. (914.4

mm) allowed.

If refrigerant tubes or indoor coil are exposed to atmosphere, they

nmst be evacuated to 500 microns to eliminate contamination and
moisture in the system.

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.

Refrigerant Tubing Connection Outdoor
Connect vapor and liquid tubes to fittings on vapor and liquid

service valves (see Table 1.) Use refrigerant grade tubing
Sweat Connection

UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment

damage or improper operation.
Service valves must be wrapped in a heat-sinking material

such as a wet cloth while brazing.