CARRIER Air Conditioner/heat Pump(outside Unit) Manual L0801361

User Manual: CARRIER CARRIER Air conditioner/heat pump(outside unit) Manual CARRIER Air conditioner/heat pump(outside unit) Owner's Manual, CARRIER Air conditioner/heat pump(outside unit) installation guides

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Installation Instructions
NOTE:
Read
installation.

the entire

instruction

manual

SAFETY

CONSIDERATIONS

before

starting

the

(See Fig. 1.)
6,

Improper

installation,

adjustment,

alteration,

When passing
refrigerant
tubes through
the wall. seal
opening with RTV or other pliable silicon-based
caulk.

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
packaged with the kits or accessories
when installing.

Avoid direct tubing contact with water
floor joists, wall studs, floors, and walls.

tubing.(See
g,

Ensure

conform
10. Isolate

Electrical

Recognize

Code (NEC)

safety information.

is the safety-alert

these

signal

words:

DANGER,

insulation

(See Fig. 1.)
by using metal sleeves

of insulation.
tubing and structure

INDOOR

WAL_7
LIQUID TUBE

b........
J

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
which could result in personal injury or death. CAUTION

to shape

WALL'-_

symbol/_.

WARNING,

insulation.

straps from

OUTDOOR

and completely

use hanger straps which are 1 in. wide and

to shape of tubing
hanger

is pliable

CAULK

When you see this symbol on the unit and in instructions
manuals, be alert to the potential for personal injury.
Understand

insulation

tube.

NOTE: Avoid contact between

for special requirements.
This

tubing

vapor

bent to conform

thoroughly
and follow
all warnings
or cautions
included
in
literature and attached to the unit. Consult local building codes and
National

Fig. 1.)

that

9. When necessary,

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

duct work.

7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap which comes in direct contact with

surrounds

instructions

pipes,

.............
r'q
THROUGH

THE WALL

hazards
is used

to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions
operation.

which will result in enhanced

ELECTRICAL

SHOCK

Failure to follow
or death.

this warning

installation,

reliability,

HAZARD
could result

in personal

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.
INSTALLATION
NOTE:

In some

gas pulsations

RECOMMENDATIONS

cases noise

from improper

in the living
installation

area has been traced to
of equipment.

1. Locate unit away from windows,
patios, decks,
unit operation sound may disturb customer.
2. Ensure

that vapor

and liquid

tube diameters

etc. where

are appropriate

for unit capacity.
3. Run

refrigerant

unnecessary
4. Leave some
vibration.

tubes

turns
slack

as directly

as possible

by avoiding

and bends.
between

structure

and unit

SUSPENSION

injury

to absorb

A94028

Fig. 1 - Connecting

Tubing

Installation

When outdoor unit is connected
to factory-approved
indoor
outdoor unit contains system refrigerant charge for operation

unit.
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
this instruction.
IMPORTANT:
residential

box cover and/or
Maximum

applications

IMPORTANT:
filter drier. Obtain
branch.

Always

liquid-line

including
install

replacement

in the Check

Charge

size is 3/8-in.

section of

OD for all

line line.
the

factory-supplied

liquid-line

filter driers from your distributor

INSTALLATION
Check

Operating

and Job Site
Remove

without
accessory
operating
ambient
maximum
outdoor

Equipment

Unpack Unit
Move
unit.

to final location.

carton

taking

care not to damage

minimum

outdoor

operating

ambient

cooling

mode

is 55°F (12.78°C),
and the maximum
outdoor
in cooling
mode is 125°F (51.67°(?).
The
operating
ambient in heating mode is 66 °F

(18.89°C).

Inspect

Check

Equipment

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

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

Install on a Solid, Level Mounting
If conditions

or local codes

require

unit.

Pad

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 determine base pan size and knockout hole location.
For

Ambient

The

hurricane

Certification

tie downs,
(Professional

On rooftop applications,
unit above a load-bearing

contact

distributor

Engineer),

mounted
baffes.

NOTE:

Conditioners
must

and

be level

manufacturer

Clearance
When

it is properly

and

in. long. (See Fig. 3.) The defrost thermostat should be located on
stub tube. Note that there is only one stub tube used with liquid
header, and on most units it is the bottom circuit.

to adequately
support unit
to building. Consult local

Heat

DEFROSTD
THERMOSTAT

5 mph may require
- Residential
Split

Pumps

for

wind

baffle

A97517

to within

_+2° (_+3/8

in./ft)

Location

per

specifications.

Make Piping

Connections

Requirements

installing,

allow

sufficient

unit. For proper airflow, a 6-in.
unit and 12-in. (304.8
mm)

space

for

airflow

clearance,

(152.4 mm) clearance on 1 side of
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
on unit.

On rooftop
surface.

located

and PE

wiring, refrigerant piping, and service. Allow 24 in. (609.6 mm)
clearance to service end of unit and 48 in. (1219.2 mm) (above

directly

to ensure

Fig. 3 - Defrost Thermostat

Unit

compressor

thermostat

mount on level platform or frame. Place
wall and isolate unit and tubing set from

units exposed to winds above
Consult
the Service
Manual

System
Air
construction.

defrost

securely attached. There is a liquid header with a brass distributor
and feeder tube going into outdoor coil. At the end of the one of
the feeder tubes, there is a 3/8 in. O.D. stub tube approximately
2

if required.

structure. Arrange supporting
members
and minimize transmission
of vibration
codes governing
rooftop applications.
Roof
wind

for details

Check

Defrost Thermostat

applications,

locate

unit

at least

6 in. above

roof

PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow
or death.

this warning

Relieve pressure
and recover
repair or final unit disposal.
Use all service ports and
including solenoid valves.

could

result in personal

all refrigerant
open

before

all flow-control

injury

system
devices,

3/8-in.
(9.53 mm) Dia.
Tiedown Knockouts
in
Basepan(2)
Places

UNIT

DAMAGE

HAZARD

Failure to follow this caution
or improper operation.

may result in equipment

damage

If ANY refrigerant
tubing is buried, provide
a 6-in (152.4
mm). 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).

View From Top
Outdoor
UNIT BASE PAN
Dimension
26X26
31

1/2X31

35 X 35

1/2

TIEDOWN KNOCKOUT LOCATIONS in. (ram)
A
B
C
9

1/3(231.3)

1/8(231,8)

6 9/16(166,7)

1/8

(231,8)

7/16(112,7)

9/16

(166,7)

1/4(539.8)
11/16(627,1)
7/16

(722,3)
A05177

Fig. 2 - Tiedown

Knockout

Locations

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.
substantial
capacity
the recommendations

and performance
losses can occur. Following
in the Application
Guideline
and Service

Manual-Residential
Split-System
Air Conditioners
and Heat
Pumps will reduce these losses.
Refer to Table 1 for accessory
requirements.
Refer to Table 2 for field tubing diameters.
There

are no buried-line

applications

greater

than

36 in. (914.4

mm)
If refrigerant tubes or indoor coil are exposed to atmosphere,
must be evacuated to 500 microns to eliminate contamination
moisture

in the system.

they
and

Table
REQUIRED
Accessory

Ball Bearing

Fan Motor

Start Assist Capacitor
Relay
Crankcase

and

Heater

Evaporator
Freeze Thermostat
Hard Shutoff TXV
Isolation
Liquid

Relay

Line Solenoid

REQUIRED FOR
LONG LINE APPLICATIONS*

Valve

Yest

Yes

Yes
Yes

No
Yes

See

Long- Line Application
Guideline

Yes

Feet

Recommended

Unit

Connected

To Factory

Approved

Table

unit contains
with approved

correct
system
refrigerant
ARI rated indoor unit when

15 ft (4.57 m) of field-supplied
or factory-accessory
factory supplied filter drier. Check refrigerant charge

charge
connected

Refrigerant

Tubing

Connect

tube to fitting on outdoor

vapor

and

Sweat

Connections

unit vapor

UNIT

018, 024
030, 036
042, 048
060

DAMAGE

tube

valves

liquid

HAZARD

to follow
this caution
or improper operation.

Service valves must be wrapped
such as a wet cloth while brazing.

result

in equipment

Tube
Diameter

Connection
Diameter

5/8

3/4

7/8

7/8
1

Tube diameters

Do not apply capillary

are for tota_ equivalent

For Tubing Set _engths between 80 and 200 ft. (24.38 and 6098 m)
horizontal or 20 ft. (6.10 m) vertical differential (250 ft/762
re)Total
Equivalent Length), refer to the Longline GuidelineAir Conditioners
and Heat Pumps using Puron ® Refrigerant

Liquid

lengths up to 80 ft (2438

tube or fixed orifice indoor

I/8

Line

Filter

Drier

coils to these units

Indoor

Refer to Fig. 5 and install filter drier as fnllows:
1. Braze 5 in. (127 mm) liquid tube to the indoor

in a heat-sinking

m)*

Tube
Diameter

material

coil.

2. Wrap filter drier with damp cloth.
3. Braze

filter drier to 5 in. (127

arm) long

liquid

tube from

step 1.

Remove plastic retainer holding
outdoor piston in liquid service
valve, leaving the piston and piston retainer inside the valve.
sweat/flare
refrigerant

VAPOR

up to 80 ft, (24.38

Notes:

Install
may

Liquid

(In.)

SIZE
Connection
Diameter

tubing, and
for maximum

service

Long[ine

and Recommended
Diameters

LIQUID

Connections

(see Table 2). Connect liquid tubing to adapter
service valve. Use refrigerant grade tubing.

Connect
Connect

2 - Refrigerant

Split-System

RATED

for
by

efficiency.

Failure
damage

Recommended
refer to Residential

and Vapor Tube

Outdoor
operation

UNIT

Indoor

FOR

For tubing line sets between 80 and 200 ft. (24.38 and 80.98 m) and/or 20 ft. (8.09 m) vertical differential,
Applicat@n Guideline.
t Additional requirement for Low-Ambient
Controller (full modu[at@n feature) MotorMaster '_ Control.

Outdoor
Unit

REQUIRED

SEA COAST APPLICATIONS
(Within 2 miles / 3.22 kin)
Standard

(Over 80 ft. / 24,38 m)
Standard

Yes

Motor Master@ Control
Low Ambient Switch
Support

Usage

COOLING APPLICATIONS
(Below 88°F / 12.8°C)
Standard

Accumulator

Compressor

1 - Accessory

FOR LOW-AMBIENT

4. Connect

and braze liquid refrigerant

tube to the filter drier.

adapter provided,
to valve. (See Fig. 4.)
tubing to fittings on outdoor unit vapor and

liquid service valves. Service valves are closed from factory and
ready for brazing. After wrapping
service valve with a wet cloth.
tubing set can be brazed to service valve using either silver bearing
or non-silver
bearing brazing material.
Do not use soft solder
(materials
which melt below 800°F/427°C).
Consult
local code
requirements.
Refrigerant tubing and indoor coil are now ready for
leak testing. This check should include all field and factory joints.
TEFLON ® SEAL

A05227

Fig. 5 - Liquid Line Filter Drier
Evacuate

UNIT
Failure
damage

Refrigerant

DAMAGE

Tubing

to follow
this caution
or improper operation.

Refrigerant
A05226

Fig. 4 - Liquid

Service

Valve

recommended

tubes

Coil

HAZARD

Never use the system compressor
LIQUID SERVICE VALVE

and Indoor

and indoor

deep vacuum

may

as a vacuum

coil should
method

result

in equipment

pump.

be evacuated

of 500 microns.

using

the

The alternate

triple evacuation
method
may be used (see triple evacuation
procedure
in service manual).
Always break a vacuum with dry
nitrogen.
3

Deep

Vacuum

Connect

Method

The deep vacuum
method requires a vacuum
pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum method

Ground

and

Power

Wires

Connect
ground wire to ground connection
in control box
safety. Connect power wiring to contactor as shown in Fig. 7.

for

is the most positive way of assuring a system is free of air and
liquid water. A tight dry system will hold a vacuum
of 1000
microns

after approximately

7 minutes.

See Fig. 6.

5000
4500

SHOCK

Failure
death.

this warning

to follow

HAZARD
could

result in personal

injury or

The unit cabinet
must have an uninterrupted
or unbroken
ground to minimize personal injury if an electrical fault should
occur. The ground
may consist
of electrical wire or metal
conduit when installed in accordance
with existing electrical
codes.

4000
LEAKIN

3500

ELECTRICAL

SYSTEM

3000
2500
o
2000

Connect
ground wire to ground connection
in control box
safety. Connect power wiring to contactor as shown in Fig. 7.
DISCONNECT[_
PER N.EC
AND/OR_
LOCAL CODES

1000
TIGHT
DRY SYSTEM

500

1500

Tubing

Check

IMPORTANT:

Check

and outdoor
not rubbing
attention
secure

CONTACTOR

FIELD

POWER

WIRING

_uO WET

Fig. 6 - Deep Vacuum
Final

MINUTES

A95424

3 PHASE

Graph

FIELD

ONLY

factory

tubing

GROUNDG
LUG

on both indoor

A94025

unit has not shifted during shipment. Ensure tubes are
against each other or any sheet metal. Pay close

to feeder tubes, makings

BLUE

(

GROUND

WIRING

to be certain

for

Fig. 7 - Line Connections
CDNTAU,OR

24VAt

CBM

sure wire ties on feeder tubes are

and tight.

Be sure field wiring

complies

with local and national

fire, safety,

and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction of
improper
protection

voltage.
device.

See unit

NOTE:

Operation

of unit

rating

plate for recommended

on improper

abuse and could affect unit reliability.
install unit in system
permissible
limits.

where voltage

line voltage

circuit

constitutes

See unit rating plate. Do
may fluctuate

above

not

OFF:NO

24VAE

ON:OK

or below

FLASH:PHASE

PROBLEM

o
L3

A00010

Fig. 8 - 3-Phase
(Applies

to 3-Phase

Table 3 - 3-Phase
Installation

Make

of filter

Electrical

drier in

uid line is

aired.

Connections

Failure
death.

SHOCK

Do not supply
cover removed.

power

with compressor

NOTE:

Use copper wire only between

NOTE:

Install branch

circuit

unit starting

current.

to handle
and readily
Route
Remove

accessible

Ground

and

access

panel

from disconnect
control box.

Route

could result in personal

to unit

disconnect
Locate

from unit, per Section
Power

power

box

size per NEC

within

440-14

sight from

wiring

to unit wiring.
hole provided

LED Indicators
STATUS

Extend

Control
24v

connect

Instructions

No call for cornpressor operation
Reversed phase
Normal
Wiring

control

leads

Only)

wires

through

control

for wiring

wiring.

specific

Use No. 18 AWG color-coded,

control

wiring

See

Thermostat

unit combinations.
insulated

grommet

wires

and into unit

and

Installation

(See Fig. 9.)

(35°C minimum)

wire. If

thermostat
is located
more than 100 ft (30.5 m) from unit, as
measured
along the control voltage
wires, use No. 16 AWG
color-coded
wire to avoid excessive voltage drop.
All wiring must be NEC
incoming power leads.

Class

1 and

must

be separated

Use furnace
transformer,
fan coil transformer,
transformer
for control power, 24v/40va minimum.

of NEC.

Wires

to gain access

through

switch and unit.

of adequate

disconnect

injury

terminal

disconnect

Units

Monitor

OFF
FLASHING
ON

HAZARD

to follow this warning

Control

LED

Connect
ELECTRICAL

Monitor

NOTE:

Use

minimum

40va

power

available

from

accessory

24v

accessories

may

exceed

requirement.

Determine

total

transformer

the

loading
andincrease
thetransformer
capacity
orsplittheloadwith
anaccessory
transfornmr
asrequired.
Final Wiring Cheek
IMPORTANT:
to ensure

Check

terminations

24 VAC HOT

factory

wiring

are secured

and field

properly.

ensure wires are not in contact

with tubing,

Compressor

Heater

Crankcase

When equipped with a crankcase
minimum
of 24 hr before starting
only, set thermostat
outdoor unit.

to OFF

wire routing

HEAT STAGE

electrical

disconnect

j--.

_¢LE]

sheet metal, etc.

____

24 VAC COM

_Jbmt_l-w_

2 F_

COOL/HEAT
STAGE 1

heater, furnish power to heater a
unit. Tn furnish power to heater

and

wire connections

Check

HEAT
PUMP

TYPICAL
FAN COIL

HP THERMOSTAT

-4-Tc_,
ivv,Jl

INDOOR

FAN

to
RVS COOLING

A crankcase heater is required if refrigerant
tubing
80 ft. Refer to the Long Line Guideline-Residential
Air Conditioners
and Heat Pumps.

Install Electrical

is longer than
Split-System

EMERGENCY
HEAT

IFAVAILABLE

Accessories
LEGEND

Refer

the

accessories

individual

instructions

packaged

with

kits

when installing.

Start-Up

24v

FACTORY

24V

FIELD WIRIN G

WIRING

FIELD SPLICE CONNECTION

OUTDOOR

THERMOSTAT

EMERGENCY

HEAT RELAY

SUPPLE ME NTAL HEAT R ELAY

PERSONAL
Failure
injury.

INJURY

to follow

HAZARD

this caution

may result

in personal
A02325 / Ag741S

Wear safety glasses,
protective
clothing,
and
handling refrigerant and observe the following:
Front seating

service

valves

are equipped

gloves

Fig. 9 - Generic

when

(See Thermostat

with Schrader

Sequence
NOTE:

Failure

HAZARD

to follow

Turn

this caution

may

result

in environmental

control

power

Cooling
On a call for cooling,

AND SAFETY

board

upon

is equipped

with 5 minute

any interruption

to indoor

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

OPERATION

Instructions

combinations)

and

lockout

of power.

outdoor

units.

Transformer

energized.

damage.

UNIT

unit

of Operation
Defrost

timer that is initiated
ENVIRONMENTAL

Diagrams

Installation

for specific

valves.

Wiring

thermostat

makes

circuits

R-O,

R-Y,

and

R-G. Circuit
R-O energizes
reversing
valve,
switching
it to
cooling
position.
Circuit
R-Y sends low voltage through
the
safeties and energizes the T1 terminal on the circuit board. If the
compressor
has been off for 5 minutes,
or power has not been
cycled for 5 minutes, the OF2 relay and T2 terminal will energize.
This will close the contactor, and start the outdoor fan motor and

HAZARD

compressor.
Failure to follow this caution
equipment damage or improper
Do not overcharge

may result
operation.

in personal

injury,

When the cycle is complete.
R-Y is turned
compressor
and outdoor
fan. The 5 minute

system with refrigerant.

Do not operate

unit in a vacuum

Do not disable

low pressure

or at negative

counting.
Compressor
will not
expires. In the event of a power

pressure.

not allow

switch in scroll compressor

applications.
Compressor
Follow

dome temperatures

these

steps

start

1. After system is evacuated,
service valves.

fully

open

liquid

and vapor

refrigerant flow (back seated). Replace caps finger-tight
tighten with wrench an additional 1/12 turn.

room

disconnects

thermostat

point is below indoor
5. Set room
ON or
minutes.

thermostat

to energize

at desired

come on again until this delay
interruption,
the time guard will

cycle for 5 minutes.

Heating

system:

2. Unit is shipped with valve stem(s) front seated (closed) and
caps installed. Replace stem caps after system is opened to

4. Set

stopping
the
guard begins

NOTE:
If the indoor blower off delay is enabled, it will run up to
an additional 90 seconds to increase system efficiency.

may be hot.

to properly

3. Close electrical

another

off,
time

and

system.

ambient

temperature.
or COOL

circuit. If the compressor
has been off for 5 minutes, or power
has not been cycled for 5 minutes, the OF2 relay and T2 terminal
will energize. This will
motor and compressor.

close the contactor,

start the outdoor

set

When the cycle is complete.
R-Y is turned
compressor
and outdoor
fan. The 5 minute

and fan control

counting.
Compressor
will not come on again until this time delay
expires. In the event of a power interruption,
the time guard will

not allow

AUTO
mode,
as desired.
Operate
Check system refrigerant charge.

unit

for

another

cycle for 5 minutes.

off,
time

fan

sure

temperature.

to HEAT

On a call for heating, thermostat
makes circuits R-Y and R-G.
Circuit R-Y sends low voltage through the safeties and energizes
the T1 terminal on the circuit board. T1 energizes the defrost logic

stopping
the
guard begins

Quiet Shift

Check

Quiet shift is a field
which will eliminate

selectable defrost mode (factory set to OFF),
occasional
noise that could be heard at the

start of defrost

and restarting

by placing
position.
When

cycle

DIP switch

of heating

3 on defrost

Quiet Shift switch

board

is placed

initiated, the following sequence
valve will energize, compressor

cycle.

It is selected

(see Fig. 10) in the ON

in ON position,

and a defrost

of operation will occur. Reversing
will turn off for 30 seconds, and

then turn back on to complete defrost. At the start of heating after
conclusion
of defrost,
reversing
valve
will de-energize,
compressor
will turn off for another 30 seconds, and the fan will
turn off for 40 seconds,

before

starting

in the heating

mode.

Defrost
The defrost control is a time/temperature
control
selectable settings of 30, 60, 90, or 120 minutes,
minutes.

These

settings

represent

after closure
begins.

of the defrost

The

thermostat

defrost

the amount

thermostat

senses

has field
set to 90

of time that nmst pass

before

coil

which
factory

the defrost

temperature

sequence

throughout

heating
cycle. When the coil temperature
reaches
the defrost
thermostat
setting of approximately
32 °F, it will close, which
energizes the DFT terminal and begins the defrost timing sequence.

charge

amount

and desired

subcooling

are shown

on unit

rating plate. Charging method is shown on infnrmation
plate inside
unit. To properly
check
or adjust charge,
conditions
must be
favorable
for subcooling
charging.
when
the outdoor
temperature
is
(21.11°C

and 37.78°C),

70°F and 80°F
below:

Favorable
conditions
exist
between
70°F
and 100°F

and the indoor

(21.11°C

temperature

and 26.67°C).

is between
the

procedure

Unit is factory charged for 15ft (4.57 m) of lineset. Adjust charge
by adding or removing 0.6 oz/ft of 3/8 liquid line above or below
15ft (4.57 m) respectively.
For standard refrigerant line lengths (80 ft/24.38 m or less), allow
system to operate in cooling mode at least 15 minutes. If conditions
are favorable,
check system charge by subcooling
method. If any
adjustment is necessary,
operate for 15 minutes
charged

the

Charge

Factory

adjust charge slowly and allow system to
to stabilize before declaring
a properly

system.

If the indoor
temperature
is above 80°F (26.67"C),
and the
outdoor temperature
is in the favorable range, adjust system charge
by weight based on line length and allow the indoor temperature
to
drop to 80W
by subcooling

(26.67°C)
before attempting
method as described above.

to check

system

charge

When the DFT has been energized for the selected time, the defrost
cycle begins.
Defrost cycle is terminated when defrost thermostat

If the indoor temperature
is below
temperature
is not in the favorable

opens, or automatically

length above or below 15ft (4.57 m) only. Charge level should then
be appropriate for the system to achieve rated capacity. The charge
level could then be checked at another time when the both indoor

Defrost

after 10 minutes.

Speedup

To initiate a forced defrost, speedup pins (J1) must be shorted with
a fiat head screwdriver
for 5 seconds
and RELEASED.
If the
defrost

thermostat

is open,

a short

defrost

cycle

will be observed

and outdoor
NOTE:

temperatures

If line length

are in a more favorable

is beyond

(actual length depends on Quiet Shift switch position). When Quiet
Shift is off, only a short 30 second defrost cycle is observed. With
Quiet Shift ON. the speedup sequence is one minute; 30 second
compressor
off period followed
by 30 seconds
of defrost
with

ft (6.10 m) vertical
separation,
special charging requirements.

compressor
operation.
When returning
compressor
will turn off for an additional
for 40 seconds.

If the defrost

thermostat

is closed,

to heating
30 seconds

a complete

mode,
the
and the fan

defrost

cycle

initiated. If the Quiet Shift switch is turned on, the compressor
will
be turned off for two 30 second intervals as explained previously.

Heating

Check

check

Chart

system

70°F (21.11°C),
or the outdoor
range, adjust charge for line set

80 ft (24.38

range.

m) or greater

See Long

Line

than 20

Guideline

for

Procedure

operation

during

heating

cycle,

refer

to the

Heating Check Chart on outdoor unit. This chart indicates whether
a correct relationship
exists between system operating pressure and
air temperature
entering indoor and outdoor units. If pressure and
temperature

do not match on chart,

not be correct.

Do not use chart

system

refrigerant

to adjust refrigerant

charge

may

charge.

Final Checks
IMPORTANT:

Before leaving

job. be sure to do the following:

1. Ensure that all wiring is routed away from tubing and sheet
metal edges to prevent rub-through
or wire pinching.
2. Ensure
adding
covers.
3. Tighten
tight.

that all wiring
panels
service

and tubing

and covers.
valve

is secure

Securely

stem caps

fasten

in unit before
all panels

to 1/12-turn

past

4. Leave
Owner's
Manual
with
owner.
Explain
operation
and periodic maintenance
requirements
in manual.

Speedup
pil_s

Shift

DIP

5. Fill out Dealer
file.

switches

A05378

Fig. 10 - Defrost
Table

4 - Defrost

PARAMETER

Control

Speedup-Timing

Sequence

MINIMUM

MAXIMUM

SPEEDUP

(MINUTES)

(NOMINAL)

30 - minute

cycle

7 sec

50 - minute

cycle

12 sec

90-minute

cycle

21 sec

lO-minute

cycle

2 sec

4.5

5.5

1 sec

5 minutes

Installation

CARE

Checklist

and place

and
finger

system
outlined

in customer

AND MAINTENANCE

For continuing
high
performance
and to minimize
possible
equipment
failure, periodic maintenance
must be perfnrmed on this
equipment.
Frequency
of maintenance
areas,
such as coastal
information.

may vary depending
upon geographic
applications.
See Users
Manual
for

PURON®

• Puron

(R-410A)

refrigerant

components
• Puron

operates

are designed

refrigerant

• Recovery
• Puron

QUICK

charging
• Manifold

at 50- 70 percent

service

pressure

• Puron,

pumps

• Do not use liquid-line

moisture

driers. Evacuate

• Observe
• All indoor

valves

pressures

less than 600 psig.

than 72 hours.

materials.

with wet cloth when brazing.
on every unit.

TXV or piston metering

device, it must be changed

refrigerant,

evacuate

then break vacuum

prior to recharging.

into the atmosphere.
tube coils.
cautions,

coils must be installed

to a hard shutoff

Puron

TXV.

while it is under a vacuum.

for service, recover

to 500 microns

all warnings,

retard.

oil to atmosphere.

filter drier is required

to atmosphere

• Do not use capillary

hose when

with POE oils.

Do not expose

with an R-22

must be opened

• Do not vent Puron

device in the manifnld

TXV.

• If indoor unit is equipped

• When system

type metering

from oil.

to certain plastics and roofing

liquid-line

• Do NOT use an R-22

• Never open system

or DOT BW400.

filter drier in liquid line.
rapidly.

• Wrap all filter driers and service
approved

Use a commercial

rating.

line filter driers in line longer

• POE oils may cause damage

• A factory

and replacement

to detect HFC refrigerant.

filter driers with rated working
suction

• Do not install a suction-line
• POE oils absorb

equipment

operating

is only compatible

will not remove

• Do not leave Puron

Be sure that servicing

rating must be 400 psig, DOT 4BA400

pressure

should be designed

as with other HFCs,

• Vacuum

than R-22.

be 700 psig high side and 180 psig low side with 550 psig low-side

• Use hoses with 700 psig service
• Leak detectors

pressures

with liquid refrigerant.

line with compressor

sets should

higher

are rose colored.

should be charged

into suction

GUIDE

to operate with Puron

cylinders

cylinder

systems

REFERENCE

and bold text.
with a hard shutoff

Puron TXV metering

device.

with dry nitrogen

and replace filter

2007 Carrier Corp. * 7310 W Morris

Manufacturer

reserves

the right to change,

St • Indianapolis,

IN 46231

at any time, specifications

and designs

Printed
without

in US.A.

Edition Date:

notice and without

12/07

obligations.

Catalog

No: 25HCA-4SI

Reptaces:

25HCA-3SI

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CARRIER Air Conditioner/heat Pump(outside Unit) Manual L0801361

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