ICP Air Conditioner/heat Pump(outside Unit) Manual L0612131

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

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These instructions

must be read and understood completely before attempting

installation.

Safety Labeling and Signal Words
DANGER,
NOTE

WARNING,

CAUTION,

and
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:

The
signal
words
DANGER,
WARNING,
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manuals that may
apply to the product.

The signal word CAUTION is used throughout this
manual in the following manner:

DANGER - Immediate hazards which will result in
severe personal injury or death.
Signal Words on Product Labeling

WARNING - Hazards or unsafe practices which
could result in severe personal injury or death.

Signal words are used in combination with colors
and/or pictures on product labels.

CAUTION - Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE - Used to highlight suggestions which
will result in enhanced installation, reliability, or
operation.

TABLE OF CONTENTS
Inspect New Unit ...............................

Safety Considerations

...........................

Location .......................................
Clearances

.................................

Unit Support ...................................
Refrigeration System

........................

Electrical Wiring ............................
Defrost System

...........................

2
2 - 3
4
4 - 9
9 - 10
10 - 11

Start-up Procedure ............................

Refrigerant Charge

............................

Sequence of Operation .........................

Troubleshooting

Maintenance

...............................

..................................

R-410A Quick Reference Guide .................

13
15

DEATH, PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.
Installation or repairs made by unqualified persons could result in equipment malfunction, property damage, personal injury and/or death.
The information contained in this manual is intended for use by a qualified service technician familiar with safety procedures and equipped with
the proper tools and test instruments.
Installation must conform with local building
codes and with the National Electrical Code
NFPA70 current edition or Canadian Electrical
Code Part 1 CSA C.22.1.

428 01 5100 01

October 2006

INSPECT NEW UNIT
After uncrating unit, inspect thoroughly for hidden damage,
tf damage is found, notify the transportation

SAFETY

company
claim.

immediately

and file a concealed

damage

CONSIDERATIONS

Consult a qualified installer, service agency, or the dealer/
distributor for information and assistance. The qualified
installer must use factory authorized kits and accessories
when modifying this product. Refer to the individual instructions packaged with the kit or accessory when
installing.
The weight of the product requires careful and proper
handling procedures when lifting or moving to avoid personal injury. Use care to avoid contact with sharp or
pointed edges.
Follow all safety codes. Wear safety glasses, protective
clothing, and work gloves. Use a heat sinking material such as a wet rag - during brazing operations. Keep a fire
extinguisher available. Consult local codes and the National Electric Code (NEC) for special requirements.
Improper installation, adjustment, alteration, service or
maintenance can void the warranty.

ELECTRICAL

SHOCK HAZARD

Failure to turn off the main (remote) electrical disconnect device could result in personal injury or
death.
Before installing, modifying or servicing system,
turn OFF the main (remote) electrical disconnect
device. There may be more than one disconnect
device.

PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage
R-410A systems operate at higher pressures than
R-22 systems. When working with R-410A systems, use only service equipment and replacement components specifically rated or approved
for R-410A service.

LOCATION
Check local codes for regulations concerning
noise, platforms, and other issues.

zoning,

Locate unit away from fresh air intakes, vents, or bedroom windows. Noise may carry into the openings and
disturb people inside.
Locate unit in a well drained area, or support unit high
enough so that water runoff will not enter the unit.
Locate unit away from areas where heat, lint, or exhaust
fumes will be discharged onto unit (as from dryer vents).

Locate unit away from recessed or confined areas where
recirculation of discharge air may occur (refer to CLEARANCES section of this document).
Roof-top installation is acceptable providing the roof will
support the unit and provisions are made for water drainage and noise/vibration dampening.
NOTE: Roof mounted units exposed to wind may require
wind baffles. Consult the manufacturer for additional information.

CLEARANCES
Nominal minimum clearances are 48 inches above unit
for discharge air and 18 inches on each side of the coil for
intake air. Clearance on any one side of the coil (normally
between unit and structure) may be reduced to 6 inches.
Nominal minimum clearances are based on a solid parallel object such as a wall or roof overhang.

Inside corner locations on single story structures require
evaluation. Large overhanging soffits may cause air recirculation in a corner area even though recommended
minimum clearances are maintained. As a guide, locate
the unit far enough out so that half of the discharge grille is
out from under the soffit.

The clearance may be reduced for a single object with
small surface area, such as the end of a wall, outside corner of a wall, fence section, post, etc. As a general rule,
the minimum clearance from the unit should equal the
width of the object. For example, a 6 inch fence post
should be a minimum of 6 inches from the unit.

When placing two or more units side-by-side,
minimum of 18 inches between units.

provide a

Provide minimum service clearance of 24 inches from
control box corner and side service panel.
Refer to Figure 1.

Do not install unit under roof overhangs unless gutters are
present. A minimum vertical clearance of 48 inches is required to the overhang.

428 01 5100 01

Figure1

Clearances (various examples)

24 _

Service

18"

Service

18"

24 _

18"

Service

24 _

18"

Service

6 _
4_

wide

fence
6_

Post

24 _

Service

18 _

428 01 5100 01

Service

18"

18 _

UNIT SUPPORT
NOTE: Unit must be level + 2 degrees (3/8inch rise or fall
per foot of run) or compressor may not function properly.
A. GROUND LEVEL INSTALLATION
The unit must be level and supported above grade by
beams, platform, or a pad. Platform or pad can be of open
or solid construction but should be of permanent materials such as concrete, bricks, blocks, steel, or pressuretreated timbers approved for ground contact. Soil conditions must be considered so that the platform or pad does
not shift or settle and leave the unit partially supported.
Minimum pad dimensions are shown in Figure 2.
If beams or an open platform are used for support, it is
recommended that the soil be treated or area be graveled
to reduce the growth of grasses and weeds.
To minimize vibration or noise transmission, it is recommended that supports not be in contact with the building
structure. However, slabs on grade constructions with an
extended pad are normally acceptable.

C, FASTENING UNIT DOWN
If conditions or local codes require the unit be attached in
place, remove the knockouts in the base pan and install
tie down bolts through the holes (refer to Figure 2).
Contact local distributor for hurricane hold-down details
and the P.E. (Professional Engineer) certification, when
required.

PROPERTY DAMAGEHAZARD
Failure to follow this caution may result in property damage.
Inadequate
unit support may cause excessive
vibration, noise, and/or stress on the refrigerant
lines, leading to refrigerant line failure.
Figure 2

PROPERTY

Tie Down Knockouts

DAMAGEHAZARD

Failure to follow this caution may result in property damage.
Top surface of platform must be above estimated
snowfall level to prevent snow blocking coil and to
allow water melt to drain from unit.
Base
Pan
Depth

B. ROOF TOP INSTALLATION
This type of installation is not recommended on wood
frame structures where low noise levels are required.

Supporting structure or platform for the unit must be level.
If installation is on a flat roof, locate unit minimum 6 inches
above roof level.
Place the unit over one or more load bearing walls. If there
are several units, mount them on platforms that are selfsupporting and span several load bearing walls. These
suggestions are to minimize noise and vibration transmission through the structure. If the structure is a home or
apartment, avoid locating the unit over bedrooms or
study.
NOTE: When unit is to be installed on a bonded guaranteed roof, a release must be obtained from the building
owner to free the installer from all liabilities.

REFRIGERATION
A. COMPONENT

253A'' x 26sA6''

9W'

47_6
''

21¼"

26 x 26Y2"

313A6
'' x 327A6
''

9W'

6%6" 24_>6''

31Y2 x 32Y£'

35" x 36%6"

9W'

6%6"

35" x 36Y2"

287_6''

SYSTEM

MATCHES

Check to see that the proper system components are in
place, especially the indoor coil.
R-410A outdoor units can only be used with R-410A specific indoor coils. If there is a refrigerant mis-match,
consult the indoor coil manufacturer to determine if a refrigerant conversion kit is available for the indoor coil.
4

Tie Down
Knockouts

Minimum
MountingPad
Dimensions

Base Pan
Width x Depth

This outdoor unit is designed for use only with indoor coils
that utilize a hard shut-off TXV refrigerant metering device. If any other type of metering device is installed on
the indoor coil, consult the indoor coil manufacturer to determine if a hard shut-off TXV conversion kit is available.

428 01 5100 01

When installing a hard shut-off TXV on an indoor coil, follow the instructions provided with the new TXV.
A typical hard shut-off TXV installation is shown in Figure
3,

B. REFRIGERANT

LINE SETS

The refrigerant line set must be properly sized to assure
maximum efficiency and proper oil circulation. Select line
set tube diameters as specified in Figure 4.
NOTE: Total line set length must not exceed 200 feet.
NOTE: A crankcase heater must be used when the refrigerant line length exceeds 80 feet.

PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
Indoor coil and outdoor unit must be listed as a
certified combination (match) in the ARI Unitary
Directory of Certified Products.
Indoor coil must have R-410A specific, hard shutoff TXV refrigerant metering device.
Figure 3

Typical TXV Installation

If outdoor unit is more than 10 feet higher than the indoor
coil, refer to the Extended Length Refrigeration Piping
Manual for instructions.
NOTE: When the outdoor
coil, the vertical separation
NOTE: When the outdoor
coil, the vertical separation

unit is higher than the indoor
must not exceed 100 feet.
unit is lower than the indoor
must not exceed 50 feet.

If it is necessary to add refrigerant line in the field, use dehydrated or dry, sealed, deoxidized, copper refrigeration
tubing. Do not use copper water pipe.
Do not remove rubber plugs or caps from copper tubing
until connections are ready to be made.
Be extra careful when bending refrigeration tubing. Tubing can "kink" easily, and if this occurs, the entire length of
tubing must be replaced.

EQUALIZER
TUBE

SENSING
BULB

SUCTION
TUBE

PERSONAL

INJURY HAZARD

Failure to relieve system pressure could result in
personal injury and/or death.
LIQUID
TUBE
HARD
SHUT-OFF
TXV
SENSING BULB

STRAP

Relieve pressure and recover all refrigerant before
servicing existing equipment, and before final unit
disposal. Use all service ports and open all flowcontrol devices, including solenoid valves.

UNIT OPERATION HAZARD
Failure to follow this caution may result in improper product operation.

(EITHE_
8 O'CLOCK

4 O'CLOCK

Figure 4

R-410A Line Set Tube Diameter (Liquid Tube Always ¾" dia,)
Service Valve Fittings

Model Size

Do not leave system open to atmosphere any longer than absolutely required for installation. Internal system components - especially refrigerant
oils - are extremely susceptible to moisture contamination. Keep ends of tubing sealed during
installation until the last possible moment.

Liquid

Suction

Line Set < 80 feet long

Line Set 80 - 200 feet long

Suction Line Diameter

18 (1 Y2ton), 24 (2 ton)

3/8"

5/8"

3_,,

30 (2Y2ton), 36 (3 ton)

¾"

3A"

7/8"

42 (3Y2ton), 48 (4 ton)

¾"

7/8"

1W'

60 (5 ton)

¾"

7/8"

1W'

NOTE: If the line set length exceeds 80 feet, also refer to Extended Length Refrigeration Piping Manual for additional information,

428 01 5100 01

C. ROUTING
LINES

AND

SUSPENDING

REFRIGERANT

Run refrigerant lines as straight and direct as possible,
avoiding unnecessary bends and turns. Always insulate
the entire suction line. Both lines should be insulated
when routed through an attic or when routed through an
underground raceway.
When routing refrigerant lines through a foundation or
wall, do not allow refrigerant lines to come in direct contact with the building structure. Make openings large
Figure 5

"_-- _OUTDOOR WALL'_

___

INDOAOR WAL_

LK-...._Fq_

NSULATION _j//z

HANGER STRAP
(AROUND SUCTION

_.,_"

_/_

Along floor or ceiling joists, suspend refrigerant lines so
that they do not contact the building structure, water
pipes, or ductwork Use insulated or suspension type
hangers Metal straps must be at least 1" wide to avoid
cutting into the tube insulation Keep the liquid and suction lines separate Refer to Figure 5

Routing and Suspending Refrigerant Lines

.,,-.--OAU

enough so that lines can be wrapped with extra insulation
Fill all gaps with RTV caulk This will prevent noise transmission between the tubing and the foundation or wall

L,QU,D

/_]_

TUBE

_,_
'_

TUBE_,

/_SUCTION

TUBE

SUCTION TUBE

1"MIN--'q
LIQUID TUBE
THROUGH

THE

SUSPENSION

WALL

Figure 6

/ Oil Traps for Outdoor Unit Higher
than Indoor Coil

UNIT OPERATION HAZARD
Failure to follow this caution may result in improper product operation,
Do not bury more than 36" of line set underground.
Refrigerant may migrate to cooler buried section
during extended periods of unit shut-down, causing refrigerant slugging and possible compressor
damage at start-up.
If ANY section of the line set is buried underground, provide a minimum 6" vertical rise at the
service valve.
D. OUTDOOR

UNIT HIGHER THAN INDOOR UNIT

10" Max.

3" Min.

20 ft.

Proper oil return to the compressor should be maintained
with suction gas velocity. If velocities drop below 1500
fpm (feet per minute), oil return will be decreased. To
maintain suction gas velocity, do not upsize vertical suction risers. Use the "<80 feet" suction line sizes shown
Figure 4.
Install oil traps every 20 feet of vertical suction line riser
(refer to Figure 6).

428 01 5100 01

E, LIQUID LINE FILTER-DRIER
Outdoor units are shipped with an appropriate filter-drier
for installation in the liquid line. Leave the plugs in the tube
ends until the filter-drier is installed. The optimal location
for the filter-drier is close to the indoor coil. Heat pump filter-driers are "bi-fiow" type. Either end can be pointed
towards indoor coil. Refer to Figure 7.

Figure 7

Liquid Line Filter-Drier
Installed at Indoor Coil

Find plastic bag taped to unit containing copper
adapter tube, brass nut, and plastic washer.

Install plastic washer in the seat inside piston body.

Fit brass nut onto adapter tube and install tube
onto liquid service valve. Tighten nut finger tight,
then wrench additional 1/2turn only. Over tightening
may damage the plastic washer.
Service valve bodies are brass and suction tube stub is
copper.
Figure 8

Liquid Service Valve with Piston
and Adapter Tube
BRASS

NUT

ADAPTER

TUBE
PLASTIC

WASHER

PISTON

LIQ

G, BRAZING CONNECTIONS

FIRE HAZARD
Failure to remove refrigerant and oil charge before
brazing could result in personal injury, death, and/
or property damage.

Filter-Drier

38-11-84

F, SERVICE VALVES
Service valves are closed and plugged from the factory.
Outdoor units are shipped with a refrigerant charge
sealed in the unit. Leave the service valves closed until all
other refrigerant system work is complete or the charge
will be lost. Leave the plugs in place until line set tubing is
ready to be inserted.
Heat pumps require a piston metering device in the liquid
service valve for proper heating operation. Piston is
shipped in the piston body of the liquid service valve, temporarily held in place with a plastic cap. Do not remove the
plastic cap until line set tubing is ready to be installed.
Refer to Figure 8 and follow these steps for piston installation:
1,

Refrigerant and oil mixture could ignite and burn
as it escapes and contacts brazing torch. Make
sure the refrigerant charge is properly removed
from both the high and low sides of the system before brazing any component or lines.
Clean line set tube ends with emery cloth or steel brush.
Remove any grit or debris.
Insert line set tube ends into service valve tube stubs.
Apply heat absorbing paste or heat sink product between
service valve and joint. Wrap service valves with a heat
sinking material such as a wet cloth.
Braze joints using a SiI-Fos or Phos-copper

alloy.

PRODUCT DAMAGE HAZARD

Remove plastic cap holding piston in piston body of
liquid service valve.

Failure to follow this caution may result in product
damage.

Check that piston size (stamped on side of piston)
matches with number listed on unit rating plate.
Return piston to piston body of liquid service valve
(either direction).

Braze with SiI-Fos or Phos-copper alloy on copper-to-copper joints and wrap a wet cloth around
rear of fitting to prevent damage to TXV.

428 01 5100 01

H. EVACUATING

LINE SET AND INDOOR COIL

The unit is shipped with a factory refrigerant charge. The
liquid line and suction line service valves have been
closed after final testing at the factory. Do not disturb
these valves until the line set and indoor coil have been
evacuated and leak checked, or the charge in the unit
may be lost.
NOTE: Do not use any portion of the factory charge for
purging or leak testing. The factory charge is for filling the
system only after a complete evacuation and leak check
has been performed,

PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
Never use the outdoor unit compressor as a vacuum pump. Doing so may damage the compressor.
Line set and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. If
deep vacuum equipment is not available, the alternate triple evacuation method may be used by following the
specified procedure.
If vacuum must be interrupted during the evacuation procedure, always break vacuum with dry nitrogen.

Triple Evacuation Method
The triple evacuation method should only be used when
system does not contain any water in liquid form and vacuum pump is only capable of pulling down to 28 inches of
mercury, Refer to Fig. 10 and proceed is as follows:
1.

Pull system down to 28 inches of mercury and allow pump to continue operating for an additional 15
minutes.

Close manifold valves or valve at vacuum pump
and shut off vacuum pump.

Connect a nitrogen cylinder and regulator to system and fill with nitrogen until system pressure is 2
psig.

Close nitrogen valve and allow system to stand for
1 hour. During this time, dry nitrogen will diffuse
throughout the system absorbing moisture.

Repeat this procedure as indicated in Figure 10.

After the final evacuate sequence, confirm there
are no leaks in the system. If a leak is found, repeat
the entire process after repair is made,

Figure 10

Triple Evacuation
I EVACUATE

IBREAK

VACUUM

WITH

Sequence

DRY NITROGEN

Deep Vacuum Method
The deep vacuum method requires a vacuum pump capable of pulling a vacuum to 500 microns and a vacuum
gauge capable of accurately measuring this vacuum level. The deep vacuum method is the most positive way of
assuring a system is free of air and water.

I EVACUATE

IBREAK

VACUUM

WITH

DRY NITROGEN

Watch the vacuum gauge as the system is pulling down.
The response of the gauge is an indicator of the condition
of the system (refer to Figure 9).
With no leaks in the system, allow the vacuum pump to
run for 30 minutes minimum at the deep vacuum level.

IEVACUATE I

I CHECK
TIGHT,
DRY
SYSTEM
(IF ITFOR
HOLDS
DEEP
VACUUM)
Figure 9

SystemGauge
Conditions
Deepand
Vacuum
Response
[ CHARGE

SYSTEM

]

5000
4500
4000
LEAKIN
SYSTEM

3500
3000
2500
O
2000

VACUUM TIGHT
TOO WET

1500
1000

TIGHT
DRY SYSTEM

5OO

3
4
MINUTES

428 01 5100 01

I. OPENING SERVICE VALVES
Outdoor units are shipped with a refrigerant charge
sealed in the unit. Opening the service valves releases
this charge into the system.

After the refrigerant charge has bled into the system,
open the Liquid service valve.
NOTE: These are not back-seating valves, tt is not necessary to force the stem tightly against the rolled lip.

NOTE: Open the Suction service valve first. If the Liquid
service valve is opened first, oil from the compressor may
be drawn into the indoor coil TXV, restricting refrigerant
flow and affecting operation of the system.

The service valve cap is a primary seal for the valve and
must be properly tightened to prevent leaks. Make sure
cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap.

Remove Suction service valve cap and insert a hex
wrench into the valve stem. Hold the valve body steady
with an end-wrench and back out the stem by turning the
hex wrench counterclockwise. Turn the stem until it just
contacts the rolled lip of the valve body.

Tighten cap finger tight and then tighten additional Y6of a
turn (1 wrench flat) to properly seat the sealing surfaces.

ELECTRICAL

SHOCK HAZARD

Before installing, modifying or servicing system,
turn OFF the main (remote) electrical disconnect
device. There may be more than one disconnect
device.
Supply voltage must be 208/230 volts (197 volt minimum
to 253 volts maximum) 60 Hz single phase.
Outdoor units are approved for use with copper conductors only. Do not use aluminum wire.
Refer to unit rating plate for minimum circuit ampacity and
circuit protection requirements.
Grounding
Permanently ground unit in accordance with the National
Electrical Code and local codes or ordinances. Use a copper conductor of the correct size from the grounding lug in
control box to a grounded connection in the service panel
or a properly driven and electrically grounded ground rod.
Connections

Make all outdoor electrical supply (Line Voltage) connections with raintight conduit and fittings. Most codes
require a disconnect switch outdoors within sight of the
unit. Consult local codes for special requirements.

428 01 5100 01

Check for leaks at the schrader ports and tighten valve
cores if necessary. Install plastic caps finger tight.

WIRING

Failure to turn off the main (remote) electrical disconnect device could result in personal injury or
death.

Wiring

J, GAUGE PORTS

Route electrical supply (Line Voltage) wiring through
knockout hole in bottom of Control Box. Connect wires to
Contactor and Ground Lug according to Wiring Diagram
on unit. Refer to Figure 11.
Route thermostat wiring through rubber grommet in bottom of Control Box. Low voltage lead wires are provided in
the control box for connection to thermostat wires (use
wire nuts). Refer to Wiring Diagram on unit and Figure 12
for low voltage wiring examples.
NOTE: Use No. 18 AWG (American Wire Gage) colorcoded, insulated (35 °C minimum) wire. If thermostat is
located more than 100 feet (30.5 m) from unit as measured along the control voltage wires, use No. 16 AWG
color-coded wires to avoid excessive voltage drop.
Figure 11

Electrical Supply (Line Voltage)
Connections

DISCONNECT
PER NEC AND/OR
LOCAL CODES
CONTACTOR

I
L1
FIELD POWER
WIRING

L2
3or13

FIELD GROUND
WIRING

-®
I

GROUND
LUG

Figure12

Typical Thermostat (Control Circuit) Connections

NOTE:

WHEN

SYSTEMS

USING

WITH

OUTDOOR

THERMOSTATS,

OUTDOOR

THERMOSTAT

ONE

OUTDOOR

INDOOR

THERMOSTAT
SUBBASE

SPLICE

CONNECTION

BE ENERGIZED

WHEN

REQUESTING

SYSTEMS

WITH

_ __"

TWO

SUPPLEMENTAL
OUTDOOR

HEAT.

THERMOSTATS

DEFROST

THERMOSTAT

INDOOR

OUTDOOR

DEFROST

BOARD

SUBBASE

SPLICE

BOARD

CONNECTION

W 2 MUST

/wo\

ODT

_,__
....
[_

-0
ODT

[]

D[]

......

h
i

D....

-0

.....

•

D-

-0

[]

....

_/_

DD-

_
I

REMOVE

WIRES

FROM

CRIMP

SYSTEMS

WITHOUT

NUT

ODT

IN INDOOR

OUTDOOR

FAN

COILWHEN

-0

-0
Z

INSTALLING

OUTDOOR

THERMOSTATS,

THERMOSTATS

INDOOR

OUTDOOR

THERMOSTAT

SPLICE

DEFROST

SUBBASE

CONNECTION

BOARD

LEGEND

24-v

FACTORY

WIRING

24-V

FIELD WIRING

-O

_ .
/W_\

-o

_]--.

FIELD SPLICE

[]

OUTDOOR

[_--.
41

[_--.

@
@

CONNECTION

THERMOSTAT

EMERGENCY
SUPPLEMENTAL

HEAT RELAY
HEAT RELAY

[]
-o

[_--.
/Ft

[_--.

\
\

-o

DEFROST

SYSTEM

A. DEFROST THERMOSTAT
The defrost thermostat is factory installed on a short tube
stub extending from the coil end plate. Refer to Figure 13
and confirm that the thermostat is securely fastened in
place on the tube stub,

428 01 5100 01

Figure13

Defrost Thermostat

NOTE: Length of defrost cycle is dependent upon length
of time it takes to remove screwdriver from test pins after
reversing valve has shifted.
7.

Unit will remain in defrost for remainder of defrostcycle time or until defrost thermostat reopens at
approximately 65 °F coil temperature of liquid line.

Turn off power to outdoor unit and reconnect fanmotor lead to OF2 on control board (refer to Figure
14),

TUBE STUIBcoIL

Figure 14

J
c_us

DEFROST
THERMOSTAT

Defrost Control Board
ol _

_ _:

B. DEFROST CONTROL BOARD
8

The defrost board is a time/temperature control which includes a field-selectable
time period between defrost
cycles of 30, 60, or 90 minutes (quick-connects located
at board edge, factory set at 90 minutes).
Defrost mode is identical to cooling mode except that outdoor-fan motor stops and second-stage heat is turned
on to continue warming conditioned space.
Initially, the defrost cycle timer starts when the contactor
is energized and a 24 VAC signal is present on the T1 terminal. Then the defrost cycle begins when the defrost
thermostat is closed and the cycle timer times out (30, 60,
90 or minutes).
To initiate a forced defrost cycle, the defrost thermostat
must be closed. This can be accomplished as follows:
1.
2.

Turn off power to outdoor unit.
Disconnect outdoor fan-motor lead from OF2 on
control board (refer to Figure 14). Tape lead to prevent grounding.

Restart unit in heating mode, allowing frost to accumulate on outdoor coil.

After a few minutes in heating mode, liquid line
temperature should drop below closing point of defrost thermostat (approximately 32 ° F).

Short between speed-up terminals with a flatbladed screwdriver (refer to Figure 14). This
reduces the timing sequence to 7, 14, or 21 seconds (30, 60, or 90 minute defrost selection,
respectively).

When you hear reversing valve change position,
remove screwdriver immediately; otherwise, control will terminate normal 10-minute defrost cycle
in approximately 2 seconds.

START-UP

-r I

Ip1

IJ J

PROCEDURE

Set indoor thermostat selector switch to OFF.

Turn ON all electrical disconnect devices.

tf unit has a crankcase heater, energize the heater
and wait 24 hours before proceeding.

428 01 5100 01

T1 C C O

Set indoor thermostat at desired temperature. Be
sure setpoint is below indoor ambient temperature
to call for cooling, or above indoor ambient to call
for heating.
Set indoor thermostat selector switch to COOL or
HEAT. Operate unit for minimum 10 minutes, then
check the system refrigerant charge.

REFRIGERANT
A. COOLING

CHARGE

MODE

R-410A Required Liquid Line
Temperature (° F) - Cooling
Mode

Outdoor units are shipped with a refrigerant charge to
match a specific indoor coil and 15 feet of refrigerant line.
If shorter or longer refrigerant lines or a different indoor
coil are used, the charge will have to be adjusted.

Figure 15

For different line lengths, add or remove charge based on
0.6 ounces charge per foot of difference. For example, a
25 foot line set is 10 feet longer than the specified 15 feet.
Add 0.6 ounces charge for each of the extra 10 feet:

Measured Liquid
Pressure (psig)
189

6
60

8
58

10112114

Rating Plate (required)
Subcooling Temperature (° F)
I

195

10 x 0.6 = 6.0 ounces additional charge

202

This outdoor unit is designed for use only with indoor coils
that utilize a hard shut-off TXV refrigerant metering device. With a hard shut-off indoor TXV, use the subcooling
method to make final charge adjustments:

208

215

222

Operate unit a minimum of 10 minutes before
checking charge.
NOTE: If outdoor unit has a 2-speed fan motor,
motor will operate in low speed when outdoor ambient temperature is below 82 °F. Pull one of the
yellow low voltage wires off the fan control and the
unit will default to high speed fan for servicing. Reconnect wire after servicing.

229

236

243

251

259

266

Measure liquid service valve pressure by attaching
an accurate gauge to service port.

274

283

Measure liquid line temperature by attaching an
accurate thermistor type sensor or electronic thermometer to liquid line near outdoor coil.

291

299

Refer to unit rating plate for required subcooling
temperature.

308

317

Refer to Figure 15. Find the required liquid line
temperature where the rating plate subcooling
temperature intersects measured liquid service
valve pressure.

326

335

345

1 O0

If the measured liquid line temperature is higher
than the chart number, add refrigerant to lower the
measured temperature.
NOTE: When adding refrigerant, charge in liquid
form, using a flow restricting device, into the suction port.
If the measured liquid line temperature is lower
than the chart number, reclaim refrigerant to raise
the measured temperature.
Tolerance is + 3 °F.

354

102

100

364

104

102

100

374

106

104

102

100

384

108

106

104

102

100

395

110

108

106

104

102

100

406

112

110

108

106

104

102

416

114

112

110

108

106

104

427

116

114

112

110

108

106

439

118

116

114

112

110

108

450

120

118

116

114

112

110

462

122

120

118

116

114

112

474

124

122

120

118

116

114

486

126

124

122

120

118

116

499

128

126

124

122

120

118

511

130

128

126

124

122

120

4.
5.

B. HEATING MODE
To check system operation during heating cycle, refer to
the Tech Label 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, system refrigerant charge may not be correct.
Do not use chart to adjust refrigerant charge.
NOTE: When charging is necessary during heating season, charge must be weighed in accordance with unit
rating plate +0.6 ounces per foot of ¾ inch liquid line
above or below 15 feet respectively.

428 01 5100 01

SEQUENCE

OF OPERATION

A, COOLING MODE

B, HEATING MODE

On a call for cooling, the thermostat makes circuits R-O,
R-Y, and R-G. Circuit R-O energizes reversing valve,
switching it to cooling position. Circuit R-Y energizes contactor, starting outdoor fan motor and compressor. Circuit
R-G energizes indoor unit blower relay, starting indoor
blower motor.

On a call for heating, the thermostat makes circuits R-Y
and R-G (circuit R-O is NOT made, and the reversing
valve stays in the de-energized, heating position). Circuit
R-Y energizes contactor, starting outdoor fan motor and
compressor. Circuit R-G energizes indoor blower relay,
starting blower motor. If the room temperature continues
to fall, circuit R-W2 is made through the second-stage
room thermostat bulb. Circuit R-W2 energizes a sequencer, bringing on the first bank supplemental electric
heat and providing electrical potential to the second heater sequencer (if used). If outdoor temperature falls below
the setting of the outdoor thermostat (field-installed option), contacts close to complete the circuit and bring on
the second bank of supplemental electric heat.

When thermostat
is satisfied, its contacts open,
de-energizing contactor and blower relay. Compressor
and motors stop.
NOTE: If indoor unit is equipped with a time-delay relay
circuit, the blower runs an additional length of time to increase system efficiency. (Applies to both cooling and
heating modes.)

When the thermostat is satisfied, its contacts open, deenergizing contactor, blower relay, and sequencer.
Compressor, motors, and heaters stop.

TROUBLESHOOTING
Some models are factory equipped with the Comfort
Alert'H Diagnostics device in the control box (refer to Figure 16). Comfort Alert provides around-the-clock
monitoring for common electrical problems, compressor
defects, and broad system faults. If trouble is detected, an
alert code is displayed with a flashing LED indicator. Alert
codes are listed in Figure 17.

Figure 16

Comfort Alert
Diagnostics
(some models)
TM

Compressor Wires
Pass Through Holes (3)

The device is factory wired and requires no modification, Low voltage lead wires are provided in the control
box for connection to thermostat wires (use wire nuts).
The Comfort Alert device operates by monitoring the
compressor power leads and the thermostat demand signal (Y terminal). It draws constant 24 VAC power at the R
and C terminals.

, Thermostat Demand

24 VAC Hot

MAINTENANCE
Condensate

Drain

During the cooling season, check monthly for free flow of
drainage and clean if necessary.
Cleanliness
These tips will help keep the air conditioner looking better
and working more efficiently:
1.

Free flow of air is essential. Keep fences, shrubs,
trash cans, and other obstructions at least 18 inches from all coil inlets.

428 01 5100 01

Keep the coil free of grass clippings, leaves,
weeds, and other debris.
NOTE: Coil may occasionally require cleaning with
a liquid solution. The coil must be cold when cleaning. Use an alkaline based cleaner only. Cleaning a
hot coil or using an acid based cleaner will remove
the paint from the fins and may clog the coil.
Never use a weather cover over the outdoor unit
unless it is a ventilated type or made of breathable
fabric that will allow moisture to evaporate rapidly.
A cover that holds moisture in the unit will cause
more rust build-up and damage than normal exposure to weather.

Figure17
Status LED
Green "POWER"
Red "TRIP"

Comfort Alert

Diagnostics

(some models)

Statue LED Description
Module has power

Status LED Troubleshooting Information
Supply voltage is present at module terminals

Thermostat demand signal
Y1 is present, but the com0ressor is not running

1. Compressor protector is open
2. Outdoor unit power disconnect is open
3. Compressor circuit breaker or fuse(s) is open
4. Broken wire or connector is not making contact

Yellow "ALERT"
Flash Code 1

Long Run Time
Compressor is running extremely long run cycles

5. Low pressure switch open if present in system
6. Compressor contactor has failed open
1. Low refrigerant charge
2. Evaporator blower is not running
3. Evaporator coil is frozen
4. Faulty metering device
5. Condenser coil is dirty
6. Liquid line restriction (filter drier blocked if present in system)
7. Thermostat is malfunctioning

Yellow "ALERT"
Flash Code 2

Yellow "ALERT"
Flash Code 3

System Pressure Trip
Discharge or suction pressure out of limits or com0ressor overloaded

1. High head pressure
2. Condenser coil poor air circulation (dirty, blocked, damaged)
3. Condenser fan is not running

Short Cycling
Compressor is running only
briefly

1. Thermostat demand signal is intermittent
2. Time delay relay or control board defective
3. If high pressure switch present go to Flash Code 2 information

4. Return air duct has substantial leakage
5. If low pressure switch present in system, check Flash Code 1
information

4. If low pressure switch present go to Flash Code 1 information
Yellow "ALERT"
Flash Code 4

Locked Rotor

Yellow "ALERT"
Flash Code 5

Open Circuit

1. Run capacitor has failed
2. Low line voltage (contact utility if voltage at disconnect is low)
3. Excessive liquid refrigerant in compressor
4. Compressor bearings are seized
1. Outdoor unit power disconnect is open
2. Compressor circuit breaker or fuse(s) is open
3, Compressor contactor has failed open
4, High pressure switch is open and requires manual reset
5, Open circuit in compressor supply wiring or connections
6, Unusually long compressor protector reset time due to extreme ambient temperature
Compressor windings are damaged
1. Run capacitor has failed
2. Open circuit in compressor start wiring or connections
3. Compressor start winding is damaged
7,

Yellow "ALERT"
Flash Code 6

Open Start Circuit
Current only in run circuit

Yellow "ALERT"
Flash Code 7
Yellow "ALERT"

Open Run Circuit
Current only in start circuit
Welded Contactor

Flash Code 8

Compressor always runs

Yellow

Low Voltage

1. Control circuit transformer is overloaded

Control circuit < 17VAC

2. Low line voltage (contact utility if voltage at disconnect is low)

"ALERT"

Flash Code 9

1. Open circuit in compressor run wiring or connections
2. Compressor run winding is damaged
1. Compressor contactor has failed closed
2. Thermostat demand signal not connected to module

• Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated.
• TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation.
• Reset ALERT Flash code by removing 24VAC power from module.
• Last ALERT Flash code is displayed for 1 minute after module is powered on.
14

428 01 5100 01

R-410A

QUICK REFERENCE

GUIDE

• R-410A refrigerant operates at 50% - 70% higher pressures than R-22.
replacement components are designed to operate with R-410A.

Be sure that servicing equipment and

• R-410A refrigerant cylinders are rose colored.
• Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
• R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the
manifold hose.
• Manifold sets should be 750 psig high-side

and 200 psig low-side with 520 psig low-side retard.

• Use hoses with 750 psig service pressure rating.
• Leak detectors should be designed to detect HFC refrigerant.
• R-410A, as with other HFC refrigerants, is only compatible with POE oils.
• Vacuum pumps will not remove moisture from oil.
• Do not use liquid line filter-driers

with rated working pressures less than 600 psig.

• Do not install a suction line filter-drier

in liquid line.

• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• POE oils may cause damage to certain plastics and roofing materials.
• Wrap all filter-driers
• A liquid line filter-drier

and service valves with wet cloth when brazing.
is required on every unit.

• Do not use with an R-22 TXV.

• If indoor unit is equipped with an R-22 TXV, it must be changed to an R-410A TXV.
• Never open system to atmosphere while it is under a vacuum.
• When system must be opened for service, break vacuum with dry nitrogen and replace all filter-driers.
• Do not vent R-410A into the atmosphere.
• Do not use capillary tube indoor coils.
• Observe all WARNINGS,

428 01 5100 01

CAUTIONS,

NOTES, and bold text.

International Comfort Products, LLC
Lewisburg, TN 37091

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ICP Air Conditioner/heat Pump(outside Unit) Manual L0612131

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