Lennox 2SHP13, 2SHP13-18, 2SHP13-24, 2SHP13-30, 2SHP13-36 Installation And Maintenance Instructions Manual

INSTALLATION AND MAINTENANCE

INSTRUCTIONS

2SHP13 Series

Split System Heat Pump

WARNING

The equipment covered in this manual is to be installed by trained and experienced
service and installation technicians. Improper installation, modification, service, or
use can cause electrical shock, fire, explosion, or other conditions which may cause
personal injury, death, or property damage. Use appropriate safety gear including
safety glasses and gloves when installing this equipment.

WARNING

Risk of electrical shock. Disconnect all
remote power supplies before installing or
servicing any portion of the system. Failure
to disconnect power supplies can result in
property damage, personal injury, or death.

WARNING

Installation and servicing of air conditioning
equipment can be hazardous due to internal
refrigerant pressure and live electrical com­ponents. Only trained and qualified service
personnel should install or service this equip­ment. Installation and service performed by
unqualified persons can result in property
damage, personal injury, or death.

WARNING

Sharp metal edges can cause injury. When
installing the unit, use care to avoid sharp
edges.

TABLE OF CONTENTS

INSTALLATION ...................................... 2

START-UP............................................. 11

OPERATION ........................................ 15

MAINTENANCE ................................... 17

HOMEOWNER INFORMATION ........... 18

CONNECTION DIAGRAMS ................. 21

WARRANTY......................................... 23

Manufactured By

A.A.C.

A Lennox International Inc. Company

421 Monroe Street

Bellevue, OH 44811

*48306B006*

Save these instructions for future reference

# 48306B006 Page 1

INSTALLATION

Location of Unit

General

Read this entire instruction manual, as well as the
instructions supplied in separate equipment, before
starting the installation. Observe and follow all warn­ings, cautions, instructional labels, and tags. Failure
to comply with these instructions could result in an
unsafe condition and/or premature component failure.

These instructions are intended as a general guide only for
use by qualified personnel and do not supersede any national
or local codes in any way. The installation must comply with all
provincial, state, and local codes as well as the National
Electrical Code (U.S.) or Canadian Electrical Code (Canada).
Compliance should be determined prior to installation.

When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. Table 1 shows
torque values for fasteners.

Torque Table

renetsaF euqroT

spaCmetS.sbl.tf8

spaCtroPecivreS .sbl.tf8

swercSlateMteehS.sbl.ni61

swercSenihcaM8# .sbl.ni61

swercSenihcaM01#.sbl.ni82

Outdoor units operate under a wide range of weather
conditions; therefore, multiple factors must be considered
when positioning the unit. The unit must be positioned to
give adequate clearances for sufficient airflow and servic­ing. Refer to Figure 1 for installation clearances.

Installation Clearances

36"

36 *"

36 *"

* A service clearance of 30" must be maintained on

one of the sides adjacent to the control box.
Clearance to one of the other three sides must be
36". Clearance to one of the remaining two sides
may be 12" and the final side may be 6".

A clearance of 24" must be maintained between units.

48" clearance required on top of unit. Maximum soffit
overhang is 36".

36"

stloBrosserpmoC .sbl.ni09

Table 1

Inspection of Shipment

Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted
on the carrier’s freight bill. Take special care to examine
the unit inside the carton if the carton is damaged. Any
concealed damage discovered should be reported to the
last carrier immediately, preferably in writing, and should
include a request for inspection by the carrier’s agent.

If any damages are discovered and reported to the carrier
DO NOT INSTALL THE UNIT, as claim may be denied.

Check the unit rating plate to confirm specifications
are as ordered.

Figure 1

• Place a sound-absorbing material, such as Isomode,
under the unit if it will be installed in a location or
position that will transmit sound or vibration to the
living area or adjacent buildings.

• Install the unit high enough above the ground or roof
to allow adequate drainage of defrost water and
prevent ice buildup.

• In heavy snow areas, do not locate the unit where
drifting snow will occur. The unit base should be
elevated above the depth of average snows.

NOTE: Elevation of the unit may be accomplished by
constructing a frame using suitable materials. If a
support frame is constructed, it must not block drain
holes in unit base.

• When installed in areas where low ambient tempera­tures exist, locate unit so winter prevailing winds do
not blow directly into outdoor coil.

Page 2 # 48306B006

• Locate unit away from overhanging roof lines which would
allow water or ice to drop on, or in font of, coil or into unit.

Slab Mounting

Wind Barrier Construction

Prevailing Winter Winds

When installing a unit at grade level, install on slab high
enough above grade so that water from higher ground will
not collect around the unit (see Figure 2). Slab should have
a slope tolerance away from the building of 2° or 2" per 5'.
This will prevent ice from building up under the unit during a
defrost cycle. Refer to following roof mounting section for
barrier construction if unit must face prevailing winter winds.

Slab Mounting

Discharge Air

Building

Structure

Mounting Slab

Ground Level

2° or 2" per 5' slope tolerance away from building
structure.

Figure 2

Roof Mounting

Install unit at a minimum of 6" above surface of the roof to
avoid ice buildup around the unit. Locate the unit above a
load bearing wall or area of the roof that can adequately
support the unit. Consult local codes for rooftop applications.

If unit coil cannot be mounted away from prevailing winter
winds, a wind barrier should be constructed (see Figure 3).
Size the barrier at least the same height and width as the
outdoor unit. Mount barrier 24" from the sides of the unit in
the direction of the prevailing winds.

Electrical Wiring

Wind Barrier

Inlet Air

Inlet Air

24"

Inlet Air

Figure 3

WARNING

Unit must be grounded in accordance with
national and local codes. Failure to ground unit
properly can result in personal injury or death.

WARNING

Line voltage is present at all components
when unit is not in operation on units with
single pole contactors. Disconnect all remote
electric power supplies before opening access
panel. Unit may have multiple power supplies.
Failure to disconnect all power supplies could
result in personal injury or death.

Refer to the furnace or blower coil Installation Instructions
for additional wiring application diagrams and refer to unit
rating plate for minimum circuit ampacity and maximum
overcurrent protection size.

1. Install line voltage power supply to unit from a properly
sized disconnect switch. Any excess high voltage field
wiring should be trimmed or secured away from the
low voltage field wiring.

All field wiring must be done in accordance with the
National Electrical Code (NEC) recommendations,
Canadian Electrical Code (CEC) and CSA Standards, or
local codes, where applicable.

# 48306B006 Page 3

2. Ground unit at unit disconnect switch or to an earth
ground. To facilitate conduit, a hole is in the bottom of the
control box. Connect conduit to the control box using a
proper conduit fitting. Units are approved for use only with
copper conductors. 24V Class II circuit connections are
made in the low voltage junction box. A complete unit
wiring diagram is located inside the unit control box cover
(see also pages 20 and 21 of this instruction).

3. Install room thermostat on an inside wall that is not
subject to drafts, direct sunshine, or other heat sources.

4. Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit (see Figure 4).

Refrigerant Piping

Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (sweat connections) to the indoor
coil (flare or sweat connections).

5. Do not bundle any excess 24V control wire inside control
box. Run control wire through installed wire tie and tighten
wire tie to provide low voltage strain relief and to maintain
separation of field-installed low and high voltage circuits.

Thermostat Designations

(Some connections may not apply.

Refer to specific thermostat and indoor unit.)

Without Auxiliary Heat

Select line set diameters from Table 2 to ensure that oil
returns to the compressor. Size vertical suction riser to
maintain minimum velocity at minimum capacity. Recom­mended line length is 50' or less. If more than 50' line set is
required, contact Technical Services at [phone].
Table 2 shows the diameters for line sets up to 100' although
vertical lift applications and trapping requirements need to be
reviewed with Technical Services for line sets over 50'.

Refrigerant Line Set Diameters (in.)

eniLdiuqiL

eziSdnahtgneLteSeniL

HUTB

.tf21 .tf52 .tf05 .tf57 .tf001

000,818/38/38/38/38/3

000,42 8/3 8/3 8/3 8/3 8/3

000,038/38/38/38/32/1

000,63 8/3 8/3 8/3 8/3 2/1

000,248/38/38/32/12/1

With Auxiliary Heat

Do not connect C (common) connection between
indoor unit and thermostat except when required by
the indoor thermostat. Refer to thermostat installation
instructions. C (common) connection between indoor
unit and outdoor unit required for proper operation.

000,84 8/3 8/3 8/3 2/1 2/1

000,068/38/38/32/12/1

eniLnoitcuS

eziSdnahtgneLteSeniL

HUTB

.tf21 .tf52 .tf05 .tf57 .tf001

000,814/34/34/34/34/3

000,42 4/3 4/3 4/3 4/3 8/7

000,034/34/34/38/78/7

000,63 8/7 8/7 8/7 8/7 8/1-1

000,248/78/78/78/1-18/1-1

000,84 8/7 8/7 8/7 8/1-1 8/1-1

000,068/1-18/1-18/1-18/1-18/1-1

For installations exceeding 50', contact

Technical Services at [phone].

Table 2

Figure 4

Page 4 # 48306B006

Installing Refrigerant Line

Brazing Connection Procedure

During the installation of an air conditioning system, it is
important to properly isolate the refrigerant line to prevent
unnecessary vibration. Line set contact with the structure
(wall, ceiling, or floor) may cause objectionable noise
when vibration is translated into sound. As a result, more
energy or vibration can be expected. Close attention to
line set isolation must be observed.

Following are some points to consider when placing and
installing a high-efficiency outdoor unit:

Placement

Be aware that some localities are adopting sound ordi­nances based on how noisy the unit is at the neighbor’s
home, not at the original installation. Install the unit as far as
possible from the property line. When possible, do not
install the unit directly outside a bedroom window. Glass
has a very high level of sound transmission. Figure 5
shows how to place the outdoor unit and line set to reduce
line set vibration.

Outside Unit Placement

and Installation

Install unit away

from windows

1. Cut ends of refrigerant lines square (free from nicks
or dents). Debur the ends. The pipe must remain
round; do not pinch end of line.

2. Before making line set connections, use dry nitrogen to
purge the refrigerant piping. This will help to prevent
oxidation and the introduction of moisture into the system.

3. Use silver alloy brazing rods (5% or 6% silver alloy for
copper-to-copper brazing or 45% silver alloy for
copper-to-brass or copper-to-steel brazing) which are
rated for use with HCFC-22 refrigerant.

4. Remove the Schrader core assemblies before brazing

to protect them from damage due to extreme heat.
Replace the cores when brazing is complete.

5. Wrap a wet cloth around the valve body and copper tube
stub to protect them from heat damage during brazing.
Wrap another wet cloth underneath the valve body to
protect the base paint.

6. Braze the line set to the service valve. Quench the joints
with water or a wet cloth to prevent heat damage to the
valve core and opening port. The tube end must stay

bottomed in the fitting during final assembly to
ensure proper seating, sealing, and rigidity.

7. Install the factory-supplied fixed orifice (or thermal
expansion valve which is sold separately and which is
approved for use with HCFC-22 refrigerant) in the
liquid line at the indoor coil.

Two 90° elbows installed in lineset
will reduce lineset vibration

Figure 5

Line Set Isolation

Illustrations on the pages 6 and 7 demonstrate procedures
which ensure proper refrigerant line set isolation. Figure 6
shows how to install line sets on horizontal runs. Figure 7
shows how to make a transition from horizontal to vertical.
Figure 8 shows how to install line sets on vertical runs.

Refrigerant Metering Device

2SHP13 units are designed for use with either fixed orifice
or TXV systems. Refer to the appropriate following section
for information on installing the chosen refrigerant meter­ing device.

Fixed Orifice Systems

2SHP13 units are shipped with a fixed orifice refrigerant
metering device. Replace the existing indoor unit fixed
orifice with the orifice supplied with this unit. Place the
supplied fixed orifice sticker on the indoor cabinet after
installation. See Table 3 on page 7 for the proper fixed
orifice size for each unit. In nonstandard applications, the
provided fixed orifice may not be appropriately sized.

Install the fixed orifice as shown in Figure 9 on page 7. Do not
twist cap tubes when loosening the seal nut from the orifice
housing. Use wrench to back up the distributor.

# 48306B006 Page 5

Refrigerant Line Sets: Installing Horizontal Runs

To hang line set from joist or rafter,
use either metal strapping material
or anchored heavy nylon wire ties.

Strapping Material

(around vapor line only)

8’

Floor Joist or

Roof Rafter

Metal Sleeve

Floor Joist or Roof Rafter

Wire Tie

(around vapor line only)

Tape or Wire Tie

8’

Strap the vapor line to the joist or rafter
at 8 intervals then strap the liquid line

’

to the vapor line.

Wall
Stud

Tape or Wire Tie

Figure 6

Refrigerant Line Sets: Transition from Vertical to Horizontal

Anchored

Heavy Nylon

Wire Tie

Strap Liquid
Line to Vapor
Line

Wall

Stud

Automotive

Muffler-Type

Hanger

Strap Liquid
Line to Vapor
Line

Metal Sleeve

Liquid Line

Vapor Line Wrapped

–

in Armaflex

Metal Sleeve

Vapor Line Wrapped

in Armaflex

Liquid Line

–

Figure 7

Page 6 # 48306B006

Refrigerant Line Sets: Installing Vertical Runs (new construction shown)

NOTE: Similar installation practices
should be used if line set is to be
installed on exterior of outside wall.

IMPORTANT:

Refrigerant

lines must not

contact structure.

Wood Block

Between Studs

Vapor Line Wrapped

with Armaflex

Outside Wall

Outside Wall

Liquid Line

Caulk

IMPORTANT: Refrigerant
lines must not contact wall.

Vapor Line

Liquid Line

Wire Tie

Inside Wall

Strap

Sleeve

Wire Tie

Wood Block

Wire Tie

Strap

PVC Pipe

Fixed Orifice Data

ledoM

81-31PHS280-484001750.

42-31PHS2 11-484001 160.

03-31PHS212-484001270.

63-31PHS2 32-484001 470.

24-31PHS233-484001680.

84-31PHS2 53-484001 880.

06-31PHS273-484001090.

traP

rebmuN

Table 3

Fiberglass
Insulation

llirD

eziS

Sleeve

Figure 8

Metering Device Installation

If installing an expansion valve on an indoor coil that
previously used a fixed orifice, remove orifice before
installing valve.

# 48306B006 Page 7

Figure 9

Expansion Valve Systems

Expansion valves equipped with Chatleff-type fittings are
available from the manufacturer. See Table 4 for proper
TXV for each unit.

TXV Data

ledoM

63-,03-,42-,81-31PHS210VXT2H

84-,24-31PHS2 20VXT2H

06-31PHS230VXT2H

traP

rebmuN

Service Valve

Valve Closed

Service Port

To outdoor coil

Service

Port Cap

Schrader valve open

to line set when valve is

closed (front seated)

Insert hex

wrench here

Stem Cap

Insert hex
wrench here

To indoor coil

(valve front seated)

Stem Cap

Table 4

To install an expansion valve (see Figure 9 on page 7):

1. Separate the distributor assembly and remove the
piston orifice and used teflon seal. Insert nozzle end
of the expansion valve along with a new teflon seal
into the distributor and tighten to 20 – 30 ft. lbs. Use
backup wrench on all wrench flats. Overtightening

will crush the teflon seal and may cause a leak.

2. Attach liquid line portion of distributor assembly along
with new teflon seal to the inlet of the expansion
valve. Tighten to 20 – 30 ft. lbs. Use backup wrench
on all wrench flats. Overtightening will crush the

teflon seal and may cause a leak.

3. Connect the external equalizer line to the equalizer
port on the suction line and tighten to 8 ft. lbs.

4. Strap the superheat sensing bulb to the suction header.

If installing an expansion valve on an indoor coil that
previously used a fixed orifice, be sure to remove the
existing fixed orifice. Failure to remove a fixed orifice
when installing an expansion valve to the indoor coil will
result in improper operation and damage to the system.

Manifold Gauge Set

When checking the unit charge, use a manifold gauge set
that is equipped with “low loss” hoses. Do not use a manifold
gauge set with anything other than a “low loss” hose.

Liquid and Suction Line Service Valves

The liquid line and suction line service valves (see Figure

10) and service ports are used for leak testing, evacuat-

ing, charging, and checking charge.

Service Port

To outdoor coil

Service Port Cap

Schrader

Valve

To indoor coil

Valve Open

Figure 10

Each valve is equipped with a service port which has a
factory-installed Schrader valve. A service port cap
protects the Schrader valve from contamination and
serves as the primary leak seal.

To Access the Schrader Port:

1. Remove the service port cap with an adjustable wrench.

2. Connect gauge to the service port.

3. When testing is completed, replace service port cap.
Tighten finger tight, then an additional 1/6 turn.

To Open Liquid or Suction Line Service Valve:

1. Remove stem cap with an adjustable wrench.

2. Use a service wrench with a hex-head extension to
back the stem out counterclockwise as far as it will
go. Use a 3/16" hex head extension for liquid line
service valves and a 5/16" extension for suction line
service valves.

3. Replace the stem cap. Tighten finger tight, then
tighten an additional 1/6 turn.

Page 8 # 48306B006

To Close Liquid or Suction Line Service Valve:

Leak Testing

1. Remove the stem cap with an adjustable wrench.

2. Use a service wrench with a hex-head extension to turn
the stem clockwise to seat the valve. Tighten firmly.

3. Replace the stem cap. Tighten finger tight, then
tighten an additional 1/6 turn.

Suction Line (Ball Type) Service Valve

Suction line (ball type) service valves function the same
way as the other valves; the difference is in the construc­tion (see Figure 11).

The ball valve is equipped with a service port with a
factory-installed Schrader valve. A service port cap
protects the Schrader valve from contamination and
serves as the primary seal.

Ball Type Service Valve

(Valve Open)

After the line set has been connected to the indoor and
outdoor units, the line set connections and indoor unit
must be checked for leaks.

WARNING

Refrigerant can be harmful if inhaled. Refrigerant
must always be used and recovered responsibly.
Incorrect or irresponsible use of refrigerant can
result in personal injury or death.

WARNING

Never use oxygen to pressurize refrigeration
or air conditioning systems. Oxygen will ex­plode on contact with oil and could cause
personal injury or death.

Using an Electronic Leak Detector

Use adjustable wrench. To open, rotate stem
counterclockwise 1/4 turn (90°). To close, rotate
stem clockwise 1/4 turn (90°).

Figure 11

1. Connect the high pressure hose of the manifold
gauge set to the suction valve service port. (Normally
the high pressure hose is connected to the liquid line
port; however, connecting it to the suction ports helps
to protect the manifold gauge set from damage
caused by high pressure.)

2. With both manifold valves closed, connect the cylin­der of HCFC-22 refrigerant. Open the valve on the
HCFC-22 cylinder (vapor only).

3. Open the high pressure side of the manifold to allow
HCFC-22 into the line set and indoor unit. Weigh in a
trace amount of HCFC-22. (A trace amount is a
maximum of 2 oz. of refrigerant or 3 lbs. pressure.)
Close the valve on the HCFC-22 cylinder and the
valve on the high pressure side of the manifold gauge
set. Disconnect the HCFC-22 cylinder.

4. Connect a cylinder of nitrogen with a pressure regulat­ing valve to the center port of the manifold gauge set.

When using high pressure gas such as nitrogen
for this purpose, be sure to use a regulator that
can control the pressure down to 1 or 2 psig.

# 48306B006 Page 9

5. Adjust nitrogen pressure to 150 psig. Open the valve
on the high side of the manifold gauge set to pressur­ize the line set and the indoor coil.

Evacuation

Evacuating the system of noncondensables is critical for
proper operation of the unit. Noncondensables are defined

as any gas that will not condense under temperatures and
pressures present during operation of an air conditioning
system. Noncondensables and water vapor combine with
refrigerant to produce substances that corrode copper
piping and compressor parts.

WARNING

Do not use a compressor to evacuate a sys­tem. Avoid deep vacuum operation. Extremely
low vacuums can cause internal arcing and
compressor failure. Danger of equipment
damage. Damage caused by deep vacuum
operation will void warranty.

Use a thermocouple or thermistor electronic vacuum
gauge that is calibrated in microns. Use an instrument that
reads down to 50 microns.

1. Connect the manifold gauge set to the service valve
ports as follows:

within a 20-minute period after shutting off the
vacuum pump and closing the manifold gauge valves.

9. When the requirements above have been met,
disconnect the manifold hose from the vacuum pump.
Open the service valves to break the vacuum in the
line set and indoor unit.

• Low pressure gauge to suction line service valve

• High pressure gauge to liquid line service valve

2. Connect micron gauge.

3. Connect the vacuum pump (with vacuum gauge) to
the center port of the manifold gauge set.

4. Open both manifold valves and start vacuum pump.

5. Evacuate the line set and indoor unit to a minimum of
500 microns or lower. During the early stages of
evacuation, it is desirable to close the manifold gauge
valve at least once to determine if there is a rapid rise
in pressure. A rapid rise in pressure indicates a
relatively large leak. If this occurs, the leak testing
procedure must be repeated.

6. When 500 microns or lower is maintained, close the
manifold gauge valves, turn off the vacuum pump, and
disconnect the manifold gauge center port hose from
the vacuum pump. Attach the manifold gauge center
port hose to a nitrogen cylinder with pressure regulator
set to 150 psig and purge the hose. Open the manifold
gauge valves to break the vacuum in the line set and
indoor unit. Close the manifold gauge valves.

7. Shut off the nitrogen cylinder and remove the manifold
gauge hose from the cylinder. Open the manifold
gauge valves to release the nitrogen from the line set
and indoor unit.

8. Reconnect the manifold gauge to the vacuum pump,
turn the pump on, and continue to evacuate the line
set and indoor unit until 500 microns is maintained

Page 10 # 48306B006

START-UP

If the system is void of refrigerant, clean the system using
the procedure described below.

CAUTION

If unit is equipped with a crankcase heater, it
should be energized 24 hours before unit
start-up to prevent compressor damage as a
result of slugging.

1. Rotate fan to check for frozen bearings or binding.

2. Inspect all factory and field-installed wiring for loose

connections.

3. After evacuation is complete, open liquid line and

suction line service valves to release refrigerant
charge (contained in outdoor unit) into system.

4. Replace the stem caps and secure finger tight, then

tighten an additional 1/6 of a turn.

5. Check voltage supply at the disconnect switch. The

voltage must be within the range listed on the unit
nameplate. If not, do not start equipment until the
power company has been consulted and the voltage
condition corrected.

6. Set thermostat for cooling demand, turn on power to

indoor blower, and close the outdoor unit disconnect
switch to start the unit.

1. Use dry nitrogen to pressurize the system and check
for leaks. Repair leaks, if possible.

2. Evacuate the system to remove as much of the
moisture as possible.

3. Use dry nitrogen to break the vacuum.

4. Evacuate the system again.

5. Weigh the appropriate amount of HCFC-22 refrigerant
(listed on unit nameplate) into the system.

6. Monitor the system to determine the amount of
moisture remaining in the oil. Use a test kit to verify
that the moisture content is within the kit’s dry color
range. It may be necessary to replace the filter drier
several times to achieve the required dryness level. If

system dryness is not verified, the compressor
will fail in the future.

The outdoor unit should be charged during warm weather.
However, applications arise in which charging must occur
in the colder months. The method of charging is deter­mined by the unit’s refrigerant metering device and the
outdoor ambient temperature.

Measure the liquid line temperature and the outdoor
ambient temperature as outlined below:

7. Recheck unit voltage with unit running. Power must be
within range shown on unit nameplate.

Refrigerant Charging

Units are factory charged with the amount of HCFC-22
refrigerant indicated on the unit rating plate. This charge is
based on a matching indoor coil and outdoor coil with 15'
line set. For varying lengths of line set, refer to Table 5 for
refrigerant charge adjustment.

Refrigerant Charge Adjustment

teSeniLdiuqiL

retemaiD

.ni8/3.tf5rep.zo3

* If line length is greater than 15 ft., add this amount.

If line length is less than 15 ft., remove this amount.

tsujda.tf5rep.zO

*tesenil.tf51morf

Table 5

1. Connect the manifold gauge set to the service valve
ports as follows (see Figure 12 on page 12):

• Low pressure gauge to suction line service valve

• High pressure gauge to liquid line service valve

2. Close manifold gauge set valves. Connect the center
manifold hose to an upright cylinder of HCFC-22.

3. If room temperature is below 70°F, set the room thermo­stat to call for heat. This will create the necessary load
for properly charging the system in the cooling cycle.

4. Use a digital thermometer to record the outdoor
ambient temperature.

5. When the heating demand has been satisfied, switch
the thermostat to cooling mode with a set point of
68°F. When pressures have stabilized, use a digital
thermometer to record the liquid and suction line
temperatures.

6. The outdoor temperature will determine which charg­ing method to use. Proceed with the appropriate
charging method.

# 48306B006 Page 11

Cooling Cycle

DEFROST THERMOSTAT

EXPANSION/CHECK VALVE

LOW

PRESSURE

GAUGE MANIFOLD

PRESSURE

TO

HCFC-22

DRUM

HIGH

LIQUID

SERVICE

BIFLOW
FILTER / DRIER

MUFFLER

LINE

PORT

DISTRIBUTOR

OUTDOOR COIL

COMPRESSOR

SUCTION
SERVICE

PORT

REVERSING VALVE

SUCTION
LINE
VALV E

EXPANSION/CHECK VALVE

NOTE - ARROWS INDICATE

DIRECTION OF
REFRIGERANT FLOW

INDOOR UNIT

INDOOR

COIL

Use gauge ports on suction line valve and liquid line valve for evacuating refrigerant lines and indoor coil. Use
suction gauge port to measure suction pressure during charging.

Figure 12

OUTDOOR UNIT

Charge Using Weigh-In Method (Fixed Orifice/TXV
Systems)

If the system is void of refrigerant, or if the outdoor
ambient temperature is cool, first locate and repair any
leaks then use the weigh-in method to charge the unit.

1. Recover the refrigerant from the unit.

2. Conduct a leak check, then evacuate as previously
outlined.

3. Weigh in the charge according to the total amount
shown on the unit nameplate.

If weighing facilities are not available or if unit is being
charged during warm weather, follow one of the other
procedures outlined below.

Charge Using Subcooling Method (Fixed Orifice/TXV
Systems) – Outdoor Temperatures 65°F or Above

If charging a fixed orifice or TXV system when the outdoor
ambient temperature is 65°F or above, the subcooling
method can be used to charge the unit.

check both the outdoor ambient and the liquid line
temperatures.

2. At the same time, record the liquid line pressure reading.

3. Use a temperature/pressure chart for HCFC-22 to
determine the saturation temperature for the liquid line
pressure reading.

4. Subtract the liquid line temperature from the satura­tion temperature (according to the chart) to determine
subcooling.

_____ ° Saturation Temperature °F

–

_____ ° Liquid Line Temperature °F

=

_____ ° Subcooling Value °F

5. Compare the subcooling value with those shown in
Table 6. If subcooling is greater than shown, recover
some refrigerant. If subcooling is less than shown,
add some refrigerant.

Charge Using Superheat Method (Fixed Orifice Sys­tems) – Outdoor Temperatures 65°F or Above

1. With the manifold gauge hose still on the liquid
service port and the unit operating stably, use a digital
thermometer to record the liquid line temperature. For

1. With the manifold gauge hose on the suction service
port and the unit operating stably, use a digital ther­mometer to record the suction line temperature.

best results, use the same digital thermometer to

2. At the same time, record the suction line pressure
reading.

Page 12 # 48306B006

Subcooling Values for

Fixed Orifice or TXV Systems

roodtuO

.pmeT

F°

5631514131315141

57 01 31 21 01 01 31 21

588111188 1111

59 7 9 01 7 7 9 01

501 6896689

511 3 5 6 3 3 5 6

81- 42- 03- 63- 24- 84- 06-

)F°1±(gniloocbuSdiuqiL

Table 6

Superheat Values for

Fixed Orifice Systems

(80°DB/67°WB Return Air)

.pmeTtneibmAroodtuO

F°

0683

56 53

0703

57 62

0822

58 81

0921

59 8

taehrepuS

F°

3. Use a temperature/pressure chart for HCFC-22 to
determine the saturation temperature for the suction
line pressure reading.

4. Subtract the saturation temperature (according to the
chart) from the suction line temperature to determine
the superheat.

_____ ° Suction Line Temperature °F

–

_____ ° Saturation Temperature °F

=

_____ ° Superheat Value °F

5. Compare the superheat value with those shown in
Table 7. If superheat is greater than shown, add some
refrigerant. If superheat is less than shown, recover
some refrigerant.

Charge Using Approach Method (TXV Systems) –
Outdoor Temperatures 65°F or Above

The following procedure is intended as a general guide
and is for use on expansion valve systems only. For best
results, indoor temperature should 70°F to 80°F. Monitor
system pressures while charging.

0015

501 0

Table 7

Pressures higher than those listed indicate that the
system is overcharged. Pressures lower than those
listed indicate that the system is undercharged. Verify
adjusted charge using the approach method.

4. Use the same digital thermometer used to check
outdoor ambient temperature in Step 1 to check liquid
line temperature. Verify the unit charge using the
approach method.

5. Subtract the outdoor ambient temperature from the
liquid line temperature to determine the approach
temperature.

_____ ° Liquid Line Temperature °F

–

_____ ° Outdoor Ambient Temperature °F

=

_____ ° Approach Temperature °F

1. Record outdoor ambient temperature using a digital
thermometer.

2. Attach high pressure gauge set and operate unit for
several minutes to allow system pressures to stabilize.

3. Compare stabilized pressures with those provided in
Table 8 on page 14. Minor variations in these pres­sures may be expected due to differences in installa­tions. Significant differences could mean that the

system is not properly charged or that a problem
exists with some component in the system.

# 48306B006 Page 13

6. Compare the approach value with those shown in
Table 9 on page 14. If the values to do not agree with
those provided in Table 9, add refrigerant to lower the
approach temperature or recover refrigerant from the
system to increase the approach temperature.

Check Charge Using Normal Operating Pressures

Use Table 8 on page 14 to perform maintenance checks.
Table 8 is not a procedure for charging the system. Minor
variations in these pressures may be due to differences in
installations. Significant deviations could mean that the

Normal Operating Pressures

gnilooC

lioCroodtuO

riAgniretnE

F°.pmeT

5614118841086418745187931767418764176

57 361 28 671 28 171 97 081 88 361 47 371 97 071 47

5819148602381020801299191183020899118

59 222 58 042 48 332 18 642 901 022 48 632 18 032 48

5016527877268172187729116525837238

511 692 98 223 78 313 38 813 031 492 78 513 48 603 78

81- 42- 03- 63- 24- 84- 06-

L S L S L S L S L S L S L S

662

gnitaeH

lioCroodtuO

riAgniretnE

F°.pmeT

0529146581068918569185402952129541206

04 081 35 671 05 881 74 581 74 591 94 591 04 202 05

0327134561945715367173481939819319104

02 461 43 261 13 361 62 071 03 871 23 971 13 181 33

81- 42- 03- 63- 24- 84- 06-

L S L S L S L S L S L S L S

L – Liquid S – Suction

Values provided above are typical pressures. Indoor unit matchup, indoor air quality, and indoor load will cause
pressures to vary.

58

system is not properly charged or that a problem exists
with some component in the system.

Table 8

Approach Values for TXV Systems

ledoM 81- 42- 03- 63- 24- 84- 06-

.pmeT

789 11787

F°

Approach value is the liquid line temperature
minus the outdoor ambient temperature (±1°F).

NOTE: For best results, use the same digital
thermometer to check both outdoor ambient and
liquid temperatures.

Table 9

Page 14 # 48306B006

OPERATION

Outdoor unit and indoor blower cycle on demand from the
room thermostat. When the thermostat blower switch is
moved to the ON position, the indoor blower operates
continuously.

Emergency heat is usually used during an outdoor shut­down, but it should also be used following a power outage if
power has been off for over an hour and the outdoor
temperature is below 50°F. System should be left in the
emergency heat mode at least 6 hours to allow the crank­case heater sufficient time to prevent compressor slugging.

Filter Drier

The unit is equipped with a bi-flow filter, If replacement is
necessary, replace with one of similar design.

Crankcase Heater

If unit is equipped with a crankcase heater, it should
be energized 24 hours before unit start-up to prevent
compressor damage as a result of slugging.

Emergency Heat Function (Room Thermostat)

An emergency heat function is designed into some room
thermostats. This feature is applicable when isolation of
outdoor unit is required or when auxiliary electric heat is
stage by outdoor thermostats. When the room thermostat is
placed in the emergency heat position, the outdoor unit
control circuit is isolated from power and the field-supplied
relays bypass the outdoor thermostats. An amber indicating
light simultaneously comes on to remind the homeowner
that the unit is operating in the emergency heat mode.

Defrost System

The defrost system includes two components: the defrost
thermostat and the defrost control.

Defrost Thermostat

The defrost thermostat is located on the liquid line be­tween the check/expansion valve and the distributor.
When the defrost thermostat senses 42°F or cooler, the
thermostat contacts close and send a signal to the defrost
control board to start the defrost timing. It also terminates
defrost when the liquid line warms up to 70°F.

Defrost Control

The defrost control board includes the combined functions
of time/temperature defrost control, defrost relay, diagnos­tic LEDs and terminal strip for field wiring connections
(see Figure 13).

Defrost Interval

Timing Pins

Test Pins

Compressor Delay Pins

Reversing Valve

S87

Low Pressure Switch

Defrost Thermostat

High Pressure Switch

Defrost Control Board

P1

30

P5

O-OUT

LO-PS

DF

Y1-OUT

HI-PS

(optional)

60
90

TEST

U1

K3 Relay

C2

K1 Relay

U2

C5

TST PS DF C R O Y1

FAN

K2 Relay

L

24V

P6

P2

DS1

DS2

W1

C

L

R

O

Y1

Diagnostic LEDs

24V TerminalStrip
Connections

# 48306B006 Page 15

Figure 13

The control provides automatic switching from normal
heating operation to defrost mode and back. During the
compressor cycle (call for defrost), the control accumu­lates compressor run time at 30, 60, 90 minute field­adjustable intervals. If the defrost thermostat is closed
when the selected compressor run time interval ends, the
defrost relay is energized and the defrost begins.

Defrost Control Timing Pins

Each timing pin selection provides a different accumulated
compressor run time period during one thermostat run
cycle. This time period must occur before a defrost cycle
is initiated. The defrost interval can be adjusted to 30 (T1),
60 (T2), or 90 (T3) minutes. The defrost timing jumper is
factory installed to provide a 60-minute defrost interval. If
the timing selector jumper is not in place, the control
defaults to a 90-minute defrost interval. The maximum
defrost period is 14 minutes and cannot be adjusted.

A test option is provided for troubleshooting. The test mode
may be started any time the unit is in the heating mode and
the defrost thermostat is closed or jumpered. If the jumper is
in the TEST position at power up, the control will ignore the
test pins. When the jumper is placed across the TEST pins
for 2 seconds, the control will enter the defrost mode. If the
jumper is removed before an additional 5-second period has
elapsed (7 seconds total), the unit will remain in defrost
mode until the defrost thermostat opens or 14 minutes have
passed. If the jumper is not removed until after the additional
5-second period has elapsed, the defrost will terminate and
the test option will not function again until the jumper is
removed and reapplied.

During a single demand cycle, the defrost control will lock
out the unit after the fifth time that the circuit is interrupted
by any pressure switch wired to the control board. In
addition, the diagnostic LEDs will indicate a locked-out
pressure switch after the fifth occurrence of an open pres­sure switch (see Table 10). The unit will remain locked out
until power to the board is interrupted, then re-established, or
until the jumper is applied to the TEST pins for 0.5 seconds.

NOTE: The defrost control board ignores input from the
low pressure switch terminals as follows:

• During the TEST mode

• During the defrost cycle

• During the 90-second start-up period

• For the first 90 seconds each time the reversing
valve switches heat/cool modes

If the TEST pins are jumpered and the 5-minute delay
is being bypassed, the LO PS terminal signal is not
ignored during the 90-second start-up period.

Diagnostic LEDs

The defrost board uses two LEDs for diagnostics. The
LEDs flash a specific sequence according to the condition
as shown in Table 10.

Compressor Delay

The defrost board has a field-selectable function to reduce
occasional sounds that may occur while the unit is cycling
in and out of the defrost mode. The compressor will be
cycled off for 30 seconds going in and out of the defrost
mode when the compressor delay jumper is removed.

NOTE: The 30-second “off” cycle is not functional when
jumpering the TEST pins.

Time Delay

The timed-off delay is 5 minutes long. The delay helps to
protect the compressor from short cycling in case the
power to the unit is interrupted or a pressure switch
opens. The delay is bypassed by placing the timer select
jumper across the TEST pins for 0.5 seconds.

Pressure Switch Circuit

The defrost control includes a low pressure (loss of
charge pressure) switch. A high pressure switch (optional)
can be connected to the board’s HI PS terminals (see
Figure 13 on page 15).

Page 16 # 48306B006

Defrost Control Board

Diagnostic LEDs

edoM

rewoPoN

draoBot

DELneerG

)2SD(

ffOffO

MAINTENANCE

WARNING

Before performing maintenance operations on

DELdeR

)1SD(

system, turn the electric power to unit OFF at
disconnect switch(es). Unit may have multiple
power supplies. Electrical shock could cause
personal injury or death.

draoBotrewoP

tuokcoL

erusserPwoL

tluaFhctiwS

erusserPwoL

erusserPhgiH

tluaFhctiwS

erusserPhgiH

/noitarepOlamroN

elcyCtrohS-itnA

tuokcoLhctiwS

tuokcoLhctiwS

Table 10

ffO hsalFwolS

ffOnO

hsalFwolS ffO

nOffO

hsalFwolSsuoenatlumiS

hsalFwolSgnitanretlA

Before the start of each heating and cooling season, the
following service checks should be performed by a
qualified service technician.

• Inspect and clean outdoor and indoor coils. The
outdoor coil may be flushed with a water hose.

NOTE: It may be necessary to flush the outdoor coil
more frequently if it is exposed to substances which
are corrosive or which block airflow across the coil
(such as pet urine, cottonwood seeds, etc...).

• Visually inspect the refrigerant lines and coils for leaks.

• Check wiring for loose connections.

• Check voltage at the indoor and outdoor units (with
units operating).

• Check amperage draw at the outdoor fan motor,
compressor, and indoor blower motor. Values should
be compared with those given on unit nameplate.

• Check, clean (or replace) indoor unit filters.

# 48306B006 Page 17

• Check the refrigerant charge and gauge the system
pressures.

• Check the condensate drain line for free and unob­structed flow. Clean drain line, if necessary.

• Adjust blower speed for cooling. Measure the pressure
drop over the coil to determine the correct blower CFM.

• Belt drive blowers: Check drive belt for wear and
proper tensions.

If insufficient cooling is reported, the unit should be
gauged and refrigerant charge checked (see Refrigerant
Charging on page 11).

HOMEOWNER INFORMATION

In order to ensure peak performance, your system must be
properly maintained. Clogged filters and blocked airflow
prevent your unit from operating at its most efficient level.

WARNING

Turn all electric power to unit OFF at discon­nect switch(es) before performing any mainte­nance operations on system. Unit may have
multiple power supplies. Electrical shock could
cause personal injury or death.

• Ask your dealer to show you where the indoor unit’s
filter is located. It will be either at the indoor unit
(installed internal or external to the cabinet) or behind
a return air grille in the wall or ceiling. Check the filter
monthly and clean or replace it as needed.

which block airflow across the coil (such as pet urine,
cottonwood seeds, etc...).

Heat Pump Operation

Heat pump units have several characteristics you should
be aware of:

• Heat pumps satisfy heating demand by delivering
large amounts of warm air into the living space. This
is quite different from gas-fired, oil-fired, or electric
furnaces which deliver lower volumes of considerably
hotter air to heat the space.

• Do not be alarmed if you notice frost on the outdoor
coil in the winter months. Frost develops on the
outdoor coil during the heating cycle when tempera­tures are below 45°F. An electronic control activates a
defrost cycle lasting 5 to 15 minutes at preset inter­vals to clear the outdoor coil of the frost. A shift in
sound type does occur during the defrost mode.

• Disposable filters should be replaced with a filter of
the same type and size. If you unsure of the filter you
need for your system, contact your dealer.

• Many indoor units are equipped with reusable foam
filters. These filters can be cleaned with a mild soap
and water solution. Rinse the filter thoroughly and let
dry completely before returning to unit or grille.

The filter and all access panels must be in place
any time the unit is in operation.

• Some systems are equipped with an electronic air
cleaner, designed to remove the majority of airborne
particles from the air passing through the cleaner. If
your system includes an electronic air cleaner, ask
your dealer for maintenance instructions.

• Inspect and clean indoor coil. The indoor evaporator
coil is equipped with a drain pan to collect condensate
formed as the system removes humidity from the
inside air. Have your dealer show you the location of
the drain line and how to check for obstructions. This
also applies to an auxiliary drain, if one is installed.

• Inspect and clean outdoor coil: Make sure no obstruc­tions restrict airflow to the outdoor unit. Leaves, trash,
or shrubs crowding the unit can cause it to work
harder and use more energy. Keep shrubbery
trimmed away from the unit and periodically check for
debris which collects around the unit.

The outdoor coil may require frequent cleaning,
depending on environmental conditions. Clean the
outdoor coil with a nonpressurized water hose to
remove surface contaminants and debris. It may be
necessary to flush the outdoor coil more frequently if it
is exposed to substances which are corrosive or

• During the defrost cycle, you may notice steam rising
from the unit. This is a normal occurrence. The
thermostat may engage auxiliary heat during the
defrost cycle to satisfy a heating demand. The unit will
return to normal operation at the conclusion of the
defrost cycle.

In case of extended power outage...

If the outdoor temperature is below 50°F and power to the
outdoor unit has been interrupted for 6 hours or longer,
observe the following when restoring power to the heat
pump system.

• Set the room thermostat selector to the “Emergency
Heat” setting to obtain temporary heat for a minimum
of 6 hours. This will allow system refrigerant pres­sures and temperatures enough time to return to a
stabilized condition.

• In the Emergency Heat mode, all heating demand is
satisfied by auxiliary heat; heat pump operation is
locked out. After a 6-hour “warmup” period, the
thermostat can then be switched to the “Heat” setting
and normal heat operation may resume.

Thermostat Operation

Though your thermostat may vary somewhat from the
description below, its operation will be similar.

Temperature Setting Levers

Most heat pump thermostats have two temperature
selector levers: one for heating and one for cooling. Set
the levers or dials to the desired temperature setpoints for
both heating and cooling. Avoid frequent temperature

Page 18 # 48306B006

adjustment; turning the unit off and back on before
pressures equalize puts stress on unit compressor.

Fan Switch

Preservice Check

If your system fails to operate, check the following before
calling for service:

In AUTO or INT (intermittent) mode, the blower operates
only when the thermostat calls for heating or cooling. This
mode is generally preferred when humidity control is a
priority. The ON or CONT mode provides continuous indoor
blower operation, regardless of whether the compressor or
auxiliary heat are operating. This mode is required when
constant air circulation or filtering is desired.

System Switch

Set the system switch for heating, cooling, or auto opera­tion. The auto mode allows the heat pump to automatically
switch from heating mode to cooling mode to maintain
predetermined comfort settings. Many heat pump thermo­stats are also equipped with an emergency heat mode
which locks out heat pump operation and provides
temporary heat supplied by the auxiliary heat.

Indicating Light

Most heat pump thermostats have an amber light which
indicates when the heat pump is operating in the emer­gency heat mode.

Temperature Indicator

• Check to see that all electrical disconnect switches

are ON.

• Make sure the thermostat temperature selector is

properly set.

• Make sure the thermostat system switch is properly set.

• Replace any blown fuses, or reset circuit breakers.

• Make sure unit access panels are in place.

• Make sure air filter is clean.

• Locate unit model number and have it handy before

calling.

The temperature indicator displays the actual room
temperature.

Programmable Thermostats

Your system may be controlled by a programmable thermo­stat. These thermostats provide the added feature of
programmable time-of-day setpoints for both heating and
cooling. Refer to the user’s information manual provided
with your particular thermostat for operation details.

# 48306B006 Page 19

Start-Up and Performance Checklist

Job Name _______________________________ Job No. ________________ Date ______________

Job Location _____________________________ City ___________________ State ______________

Installer _________________________________ City ___________________ State ______________

Unit Model No.______________ Serial No. ___________________

Service Technician ________________________________________ Nameplate Voltage ______________

Rated Load Ampacity ________ Compressor Amperage ____________ Outdoor Fan ______________

Maximum Fuse or Circuit Breaker ________________________

Electrical Connections Tight? Indoor Filter Clean? Supply Voltage (Unit Off) ________________

Indoor Blower RPM _____________ S.P. Drop Over Indoor (Dry) ____________

Outdoor Coil Entering Air Temperature _____________ Voltage with Compressor Operating _____________

Outdoor Fan Checked?

Cooling

Liquid Line Pressure __________ Suction Line Pressure ___________ Refrigerant Charge Checked?

Heating

Liquid Line Pressure __________ Suction Line Pressure ___________ Refrigerant Charge Checked?

Refrigerant Lines: Leak Checked? Properly Insulated?

Service Valves: Fully Opened? Caps Tight?

Thermostat: Calibrated? Properly Set? Level?

Sequence of Operation

Heating Correct? Cooling Correct?

Page 20 # 48306B006

OUTDOOR

FAN

RED

R

SC

COMPRESSOR

CRANKCASE HEATER

GROUND

L1

1

208-230/60/1

L2

HR1

EQUIPMENT

GROUND

PURPLE

BLACK

ORANGE

YELLOW

BLACK

COMPRESSOR

CONTACTOR

LUG

S40

DEFROST

THERMOSTAT

S40

K1-1

BLACK

YELLOW

H

RED

C

C12

DUAL

CAPACITOR

C

F

RED

REVERSING

VALV E

S

C

RED

BLACK

ORANGE

FAN

CMC1

F

PURPLE

H

BLACK

R

BLACK

B4

B1

L1

S6

K1

DEFROST

CONTROL

FAN

O-OUT

2

LO-PS

DF

COMMON

Y1 OUT

HI-PS

2

BLUE

208-230/60/1

CMC1

FAN

O-OUT

LO-PS

DF

COMMON

Y1 OUT

HI-PS

BLUE

S87
LOW PRESSURE
SWITCH

W1

C

L

R

O

Y1

L2

L1

GROUND

W1

C

2

L
R
O

Y1

2

LO-PS

1

S4
HIGH PRESSURE
SWITCH

THERMOSTAT

W1OY1

R

C

THERMOSTAT

W1

Y1

R

O

C

HI-PS

LINE VOLTAGE FACTORY INSTALLED
LINE VOLTAGE FIELD INSTALLED

24 VOLT FACTORY INSTALLED
CLASS II VOLTAGE FIELD INSTALLED

NOTE:
DO NOT CONNECT C (COMMON) CONNECTION BETWEEN THE INDOOR

UNIT AND THERMOSTAT EXCEPT WHEN REQUIRED BY THE INDOOR
THERMOSTAT. REFER TO THERMOSTAT INSTALLATION INSTRUCTIONS.
C (COMMON) CONNECTION BETWEEN INDOOR UNIT AND OUTDOOR
UNIT REQUIRED FOR PROPER OPERATION.

WARNING-­ELECTRIC SHOCK HAZARD, CAN CAUSE INJURY OR DEATH. UNIT MUST

BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES.

FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT

1

RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM
OVERCURRENT PROTECTION SIZE.

2

CONNECTION MUST BE JUMPERED WHEN OPTIONAL SWITCH IS NOT USED.

Single Phase Wiring Diagram P/N 46330-002

# 48306B006 Page 21

Figure 14

DESCRIPTION

KEY COMPONENT

B1 COMPRESSOR

B4

MOTOR - OUTDOOR FAN

C12 CAPACITOR - DUAL

CMC1 CONTROL-DEFROST

HR1 HEATER - COMPRESSOR
K1-1 CONTACTOR - COMPRESSOR

L1 VALVE - REVERSING
S4 SWITCH - HIGH PRESSURE

S6 SWITCH - DEFROST
S40 THERMOSTAT - CRANKCASE
S87 SWITCH - LOW PRESSURE

OUTDOOR FAN

RED

RELAY

25

7

OUTDOOR

FAN

OUTDOOR FAN

CAPACITOR

PURPLE

BLACK

ORANGE

BLACK

COMPRESSOR

CRANKCASE HEATER

BLACK

BLACK

COMPRESSOR

CONTACTOR

BLACK

T2

T3

L3L2L1

BLACK

T1

GROUND

LUG

S40

REVERSING

VALV E

208-230/60/3

L1

L2

1

L3

K1-1

BLACK

BLACK

BLACK

ORANGE

EQUIPMENT

GROUND

HR1

S40

C1

RED

2

BLACK

PURPLE

LINE VOLTAGE FACTORY INSTALLED

LINE VOLTAGE FIELD INSTALLED

24 VOLT FACTORY INSTALLED

CLASS II VOLTAGE FIELD INSTALLED

NOTE:
DO NOT CONNECT C (COMMON) CONNECTION BETWEEN THE INDOOR

UNIT AND THERMOSTAT EXCEPT WHEN REQUIRED BY THE INDOOR
THERMOSTAT. REFER TO THERMOSTAT INSTALLATION INSTRUCTIONS.
C (COMMON) CONNECTION BETWEEN INDOOR UNIT AND OUTDOOR
UNIT REQUIRED FOR PROPER OPERATION.

FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT

1

RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM
OVERCURRENT PROTECTION SIZE.

CONNECTION MUST BE JUMPERED WHEN OPTIONAL SWITCH IS

2

NOT USED.

WARNING-­ELECTRIC SHOCK HAZARD, CAN CAUSE INJURY OR DEATH. UNIT MUST

BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES.

BLACK

DEFROST
CONTROL

FAN

O-OUT

LO-PS

DF
COMMON
Y1 OUT

HI-PS

BLUE

W1

C

2

L

R
O

Y1

2

208-230/60/3

L1

L2

THERMOST

1

L3

GROUND

THERMOSTAT

C
L

R

O

Y1

S4
HIGH PRESSURE
SWITCH

B4

CMC1

FAN

B1

7

K10-1

5

S6

K1

L1

O-OUT

LO-PS

COMMON

Y1 OUT

HI-PS

BLUE

W1

2

DF

2

LO-PS

S87
LOW PRESSURE
SWITCH

DESCRIPTION

KEY COMPONENT

B1 COMPRESSOR
B4

MOTOR - OUTDOOR FAN

C1 CAPACITOR - OUTDOOR FAN

CMC1 CONTROL-DEFROST

HR1 HEATER - COMPRESSOR

K1-1 CONTACTOR - COMPRESSOR

K10-1 RELAY - OUTDOOR FAN

L1 VALVE - REVERSING
S4 SWITCH - HIGH PRESSURE

S6 SWITCH - DEFROST
S40 THERMOSTAT - CRANKCASE
S87 SWITCH - LOW PRESSURE

CRW1O

W1

R

C

HI-PS

Y1

Y1

O

Three Phase Wiring Diagram P/N 48437-001

Figure 15

Page 22 # 48306B006

Limited Warranty

August 1, 1997

This warranty gives you specific legal rights and you may have other rights

which vary from state/province to state/province.

Warrantor: Armstrong Air Conditioning Inc., 421 Monroe St., Bellevue, OH 44811

Armstrong Air Conditioning Inc. products are available under the following names: Air Ease, Armstrong Air, American Aire, Concord

Subject to the limitations stated in this warranty, we warrant to the first buyer for use the residential heating, cooling or heat pump unit, when
installed, operated and maintained as required by this warranty, to be free of defects in workmanship or material for a period of 5 years in
residential installations (1 year in non-residential installations) from the time of installation. We will replace any defective component without
cost or expense to you except for the costs of delivery and labor for removal and replacement of the defective component.

The 2SHP13LB Series heat pumps carry a 5-year compressor warranty. The 2SHP13LE Series heat pumps carry a 10-year
compressor warranty.

Warranty Begins

The warranty period begins when the installation is complete and the product is ready to operate. You must be able to verify this date
whenever a warranty claim is made. Original bill of sale, installer’s invoice or other similar document will suffice. If the beginning date
cannot be verified, we will consider warranty coverage to begin 6 months after the date the product was shipped from our factory.

Limitations on Implied Warranties

Implied warranties of merchantability or, to the extent applicable, fitness for a particular purpose are limited to 5 years, the same duration
as the basic limited written warranty provided herein. Some states/provinces do not allow limitations on how long an implied warranty of
merchantability or fitness lasts, so the above limitations or exclusions may not apply to you.

Only Warranty

This written Limited Warranty is the only warranty made by the warrantor; this warranty is in lieu of and excludes all other warranties,
express or implied. The warrantor does not authorize any person to provide any other warranty or to assume for it any further obligation in
connection with the warranted product.

What is NOT Covered

1. Cabinets or cabinet pieces.

2. Normal maintenance items such as filters, fan belts, fuses or other consumable items.

3. Damage caused by misuse, failure to maintain properly, accidents or acts of God.

4. External wiring, piping, venting or attachment of accessory products not integral to our product, including without limitation,
humidifier, air cleaner, vent damper, thermostat or other mechanical devices not manufactured by the warrantor.

5. Products that have been operated in a corrosive atmosphere where a concentration of acids, halogenated hydrocarbons or
other corrosive elements causes deterioration to metal surfaces or integral components. NOTE: Operation in a corrosive
atmosphere is considered abuse and voids this warranty.

6. Products that have NOT been installed in accordance with our published installation instructions, applicable local, state/
provincial or national codes, ACCA published standards.

7. Products that have NOT been installed by competent, qualified installers.

8. Products that have been moved from their original place of installation.

Warranty on Replacement Components

Any replacement component furnished by us will assume the remaining (unused) portion of the Limited Warranty.

Consequential Damages

The warrantor shall not be responsible for any consequential damages caused by any defect in the product. Some state/provinces do not
allow the exclusion or limitations of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

This product must be installed, used and cared for in accordance with the instruction manual. You are responsible for required periodic
maintenance or service, such as changing or cleaning of air filters and lubrication or cleaning of components. Failure to properly install,
operate or maintain your unit voids this warranty.

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