Carrier 25HNA936A0030030, 25HNA948A0030030, 25HNA960A0030030, 25HNA924A0030030, 25HNA624A0030020 Installation Guide

Installation Instruction

®

to the Expertg_

NOTE: Read the entire instruction manual before starting the
installation.

Unless otherwise noted, information in these installation
instructions pertain to both 25HNA6 and 25HNA9 series units.

Information that is unique to the 25HNA6 series will be identified
as such; likewise information that is unique to the 25HNA9 series

will also be identified.

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 nmst 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 iniury. 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 iniury

or death. WARNING signifies hazards which could result in
personal iniury or death. CAUTION is used to identify unsafe
practices which would result in nfinor personal iniury or product

and property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or operation.

Indoor Thermostat Control Options

Model Infinity

25HNA6 Yes Yes

25HNA9 Yes Yes*

Units containing circuit board HK38EA015or newer.

ELECTRICALSHOCK HAZARD
Failure to follow this warning could result in personal

iniury or death.
Before installing, modifying, or servicing system, main

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

[]NIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal iniury
or equipment damage.

Puron® refrigerant systems operate at higher pressures than
standard R-22 systems. Do not use R-22 service equipment
or components on Puron® refrigerant equipment.

Control 2-stage

Standard

Thermostat

CUT HAZARD

Failure to follow this caution may result in personal iniury.
Sheet metal parts may have sharp edges or burrs. Use care and

wear appropriate protective clothing and gloves when handling

_arts.

INSTALLATIONRECOMMENDATIONS

NOTE:Insomecasesnoiseinthe 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 I 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.

When outdoor unit is connected to factory-approved indoor unit,
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 applications.
IMPORTANT: Always install the factory-supplied liquid-line
filter drier. Obtain replacement filter driers from your distributor or

branch.

required unit changes for specific applications and for R-22
retrofit.

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 the 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 deternfine base pan size and knockout hole location.
For hurricane tie downs, contact distributor for details and PE

(Professional Engineer)Certification, if required.

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 nfininfize transnfission of vibration to building. Consult local
codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may require
wind baffles. Consult the Service Manual - Residential Split

System Air Conditioners and Heat Pumps Using Puron®
Refrigerant for wind baffle construction.

INSTALLATION

NOTEAvoid contact between tubing and structure

OUTDOOR W/_ INDOOR WAL_

CAUL_f__ LIQUID TUBE

SULATI__--_L VAPO R TUBE

THROUGH THE WALL

HANGER STRAP _ Ij_-_JOIST

(AROUND VAPOR _, -- INSULATION

TUBE_ _k, ]___VAPOR TUBE

b d

1" (25.4 mm) MIN. _ L LIQUID TUBE

SUSPENSION

A94028

Fig. 1 - Connecting Tube Installation

Specifications for this unit in residential new construction market
require the outdoor unit, indoor unit, refrigerant tubing sets,

metering device, and filter drier listed in presale literature. There
can be no deviation. Consult the Service Manual - Air

Conditioners and Heat Pumps Using Puron® Refrigerant to obtain

UNIT BASE PAN

DIMENSIONS

in. (ram)

86-1/2 x 40

(927.1x1016)

Fig. 2 - Tiedown Knockout Locations

NOTE: Unit nmst be level to within -+2° (-+3/8 in./fl. / -+9.53

tuna/m) per compressor manufacturer specifications.

TIEDOWN KNOCKOUT LOCATIONS

in. (ram)

A B C

11-5/8 6-13/16 28-8/4

(295.8) (178.0) (780.8)

A05242

Clearance Requirements

When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 24 in. (610 ram)

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

and 12 in. (304.8 ram) on all remaining sides nmst be maintained.
Maintain a distance of 24 in. (609.6 ram) 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 ram) above
roof surface.

Operating Ambient

The minimum outdoor operating ambient in cooling mode is
55°F/12.78°C without low ambient cooling enabled, and the
maximum outdoor operating ambient in cooling mode is

125°F/51.67°C. On Infinity communicating systems only (for
both 25HNA6 and 25HNA9), low ambient cooling is available to

0°F/-17.78°C.
The maximum outdoor operating ambient in heating mode is

66°F/18.89°C on all models.

Elevate Unit

UNIT OPERATION HAZARD

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

Do not allow water and/or ice to build up in base pan.

Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate

drainage of unit.

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

damage or improper operation.
Locate the unit in such a way that it is stable in all

circumstances including adverse weather conditions.

In Long-Line Applications, Install Liquid-Line
Solenoid Valve (LSV)

For refrigerant piping arrangements with equivalent lengths greater
than 80 ft. (24.38 m) and/or when elevation difference between

indoor and outdoor unit is greater than ---20 ft. (---6.10 m), follow
all requirements of the Residential Piping and Longline Guideline.

If required by Long-Line Guideline, install LSV kit, part no.
KHALS0401LLS, specifically designed for Puron® refrigerant

heat pumps. LSV should be installed within 2 ft. (0.61 m) of
outdoor unit with flow arrow pointing toward outdoor unit. Follow
the Installation Instructions included with accessory kit.

IMPORTANT: Flow arrow must point toward outdoor unit.

Make Piping Connections

PERSONAL INJURY AND UNIT DAMAGE

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.

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

damage or improper operation.
Do not leave system open to atmosphere any longer than

minimum required for installation. POE oil in compressor is
extremely susceptible to moisture absorption. Always keep
ends of tubing sealed during installation.

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

mm).

Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct

size and condition. For tubing requirements beyond 80 ft. (24.38
m), substantial capacity and performance losses can occur.
Following the recommendations in the Residential Piping and

Longline Guideline will reduce these losses. Refer to Table 1 for
field tubing diameters. Refer to Table 2 for accessory requirements.

Outdoor Unit Connected to Factory-Approved Indoor
Unit

Outdoor unit contains correct system refrigerant charge for
operation with factory-approved, ARI-rated indoor unit with

highest sales volume 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.

Table1 - Refrigerant Connections and Recommended Liquid and Vapor 1hbe Diameters (in.)

Information is Specific to 25HNA6 and 25HNA9 Models

Diameter

5/8

3/4
7/8
7/8

RATED VAPOR*

Tube

Diameter

5/8

3/4

7/8

1- 1/8

3/4

3/4
7/8

1- 1/8

LIQUID

UNIT SIZE

25HNA624
25HNA636
25HNA648
25HNA660

25HNA924 3/8 3/8 3/4
25HNA936 3/8 3/8 3/4
25HNA948 3/8 3/8 7/8
25HNA960 3/8 3/8 7/8

Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length linesets.

Notes:

1. Do not apply capillary tube or the fixed orifice indoor coils to these units.
2

For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (250 ff./76.2 m Total Equivalent Length),

refer to the Residential Piping and Long Line Guideline for Air Conditioners and Heat Pumps using Puron<_ Refrigerant.

ACCESSORY COOLING APPLICATIONS APPLICATIONS

Crankcase Heater Standard Standard Standard

Evaporator Freeze Protection (Low Ambient not allowed with No No

Winter Start Control (Low Ambient not allowed with non- No No

Compressor Start Assist Capacitor Standard on 25HNA6 models. Standard on 25HNA6 models. Standard on 25HNA6 models

and Relay:l: Not required for 25HNA9 Not required for 25HNA9 Not required for 25HNA9

Low-Ambient Control ambient not allowed with non-corn- No No

Support Feet Recommended No Recommended

Liquid-Line Solenoid Valve No Yes No

Puron Refrigerant Balance Port Yes1" Yest Yes1"

Hard-Shut Off TXV

For tubing set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (total equivalent length), refer to the

Residential Piping and Long Line Guideline for Air Conditioners and Heat Pumps using Purom_ Refrigerant.
1- Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.
$ Information is specific to 25HNA6 and 25HNA9 models.

REQUIRED FOR LOW-AMBIENT REQUIRED FOR SEA COAST

Standard with Infinity _' Control

non-communicating thermostat)

Standard with Infinity Control

communicating thermostat)

Standard with Infinity Control (Low

Connection

Diameter

3/8
3/8
3/8
3/8

Table 2 - Accessory Usage

(Below 55°F/12.6°C) (Within 2 miles/3.22 km)

municating thermostat)

ISO 9001:2000

Tube

Diameter

3/8
3/8
3/8
3/8

REQUIRED FOR LONG LINE

APPLICATIONS*

Connection

Pu ron,,,

the environmenta ly sould r el_ige_a_t

Id'ealHurnid_

AN{ Standard 210:249

Ua_ry Neat Pumps

@

Install Liquid-Line Filter Drier Indoor

Refer to Fig. 3 and install filter drier as follows:

1. Braze 5-in. (127 ram) liquid tube to the indoor coil.

2. Wrap filter drier with damp cloth.

3. Braze filter drier to above 5-in. (127 ram) liquid tube. Flow
arrow must point towards indoor coil.

4. Connect and braze liquid refrigerant tube to the filter drier.

Evacuate Refrigerant Tubing and Indoor Coil

[]NIT DAMAGE HAZARD
Failure to follow this caution may result in equipment

damage or improper operation.
Never use the system compressor as a vacuum pump.

[]NIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage

or improper operation.
Installation of filter drier in liquid line is required.

A05227

Fig. 3 - Liquid-Line Filter Drier

Refrigerant Tubing connection Outdoor

Connect vapor tube to fitting on outdoor unit vapor service valves
(see Table 1).

Install Adapter Tube

1. Remove plastic retainer holding outdoor piston in liquid
service valve.

2. Check outdoor piston size with matching number listed on
unit rating plate.

3. Locate plastic bag taped to unit containing adapter tube.

4. Remove Teflon® washer from bag and install on open
end of liquid service valve.

5. Remove adapter tube from bag and connect threaded nut to
liquid service valve. Tighten nut finger tight and then with

wrench tighten an additional 1/2 turn (15 ft-lb).
DO NOT OVER TIGHTEN!

Sweat Connections

Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 nficrons. The alternate
triple evacuation method may be used. See Service Manual for

triple evacuation method. Always break a vacuum with dry
nitrogen.

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 nficrons and a vacuum gauge capable of

accurately measuring this vacuum depth. The deep vacuum method

is the most positive way of assuring a system is free of air and
liquid water. (See Fig. 4)

VACUUM TIGHT
TOO WET

TIGHT
DRY SYSTEM

1 2 3 4 5 6 7

MINUTES

A95424

Fig. 4 - Deep Vacuum Graph

Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both indoor

and outdoor unit has not shifted during shipment. Ensure tubes are

not rubbing against each other or any sheet metal. Pay close

attention to feeder tubes, making sure wire ties on feeder tubes are

secure and tight.

Make Electrical Connections

ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal

iniury or death.
Do not supply power to unit with compressor ternfinal box

cover removed.

[]NIT DAMAGE HAZARD

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

• Use a brazing shield

• Wrap service valves with wet cloth or heat sink material.

Use refrigerant grade tubing. Service valves are closed from factory
and ready for brazing. After wrapping service valve with a wet

cloth, braze sweat connections using industry accepted methods
and materials. Consult local code requirements. Refrigerant tubing

and indoor coil are now ready for leak testing. This check should
include all field and factory joints.

Be sure field wiring complies with local and national fire, safety,

and electrical codes, and voltage to system is within linfits shown

on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit

protection device.
NOTE: Operation of unit on improper line voltage constitutes

abuse and could affect unit reliability. See unit rating plate. Do not

install unit in system where voltage may fluctuate above or below
pernfissible linfits.

NOTE: Use copper wire only between disconnect switch and unit.