Carrier 25HCD- User Manual

Installation Instructions

25HBB, 25HBC, 25HCD

Comfort

t

Series Heat Pumps

with Puron

r

Refrigerant

1–1/2 To 5 Nominal Tons

NOTE

: Read the entire instruction manual before starting the

installation.

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

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

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.

!

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.

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.

Pressurized

mixtures of air or gases containing

oxygen can lead to an explosion.

!

WARNING

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. 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.

INSULATION

SUCTION TUBE

LIQUID TUBE

OUTDOOR WALL

INDOOR WALL

LIQUID TUBE

SUCTION TUBE

INSULATION

CAULK

HANGER STRAP

(AROUND SUCTION

TUBE ONLY)

JOIST

1” (25.4 mm)

MIN

THROUGH THE WALL

SUSPENSION

A07588

Fig. 1 -- Connecting Tubing Installation

When outdoor unit is connected to factory–approved indoor unit,
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.

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. Obtain replacement filter driers from your distributor or
branch.