Lennox XP13-024-230, XP13-042-230, XP13-030-230, XP13-036-230, XP13-048-230 Installation Instructions Manual

INSTALLATION

E2012 Lennox Industries Inc.

Dallas, Texas, USA

THIS MANUAL MUST BE LEFT WITH THE

HOMEOWNER FOR FUTURE REFERENCE

WARNING

The State of California has determined that this product
may contain or produce a chemical or chemicals, in very
low doses, which may cause serious illness or death. It
may also cause cancer, birth defects, or reproductive
harm.

General

This XP13 outdoor heat pump is designed for use with
HFC−410A refrigerant only. This unit must be installed with
an approved indoor air handler or coil. See the Lennox
XP13 Product Specifications bulletin (EHB) for approved
indoor component match ups.

These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.

INSTRUCTIONS

Elite® Series XP13 Units

HEAT PUMP UNITS
506728−01

7/2012
Supersedes 3/2012

WARNING

Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal inju­ry or loss of life.

Installation and service must be performed by a licensed
professional installer (or equivalent) or service agency.

NOTICE !

For more in−depth information, consult the Installa­tion and Service Procedures manual, available as
Corp. 0528−L10 on DaveNet or through the Technical
Support department at 800−453−6669.

CAUTION

Before attempting to perform any service or mainte­nance, turn the electrical power to unit OFF at discon­nect switch.

Litho U.S.A.

STEP 1 −− SETTING THE UNIT −− Clearances

CLEARANCE ON ALL SIDES  INCHES (MILLIMETERS)

6 (152)

CONTROL PANEL

12 (305)

36 (914)

MINIMUM CLEARANCE BETWEEN

TWO UNITS

24 (610)

ACCESS

LOCATION

30 (762)

NOTES:

S Clearance to one of the other three

sides must be 36 inches (914mm).

S Clearance to one of the remaining

two sides may be 12 inches
(305mm) and the final side may be
6 inches (152mm).

MINIMUM CLEARANCE

ABOVE UNIT

48 (1219)

7/2012 506728−01

*2P72012* *P506728-01*

FIGURE 1

Page 1

UNIT DIMENSIONS − INCHES (MM)

A

LIQUID LINE
CONNECTION

ELECTRICAL INLETS

SUCTION LINE
CONNECTION

C

4−3/4"

(121)

B

TOP VIEW

Model Number

XP13−018−230

XP13−024−230

SIDE VIEW

35 (889) 27 (686) 28 (711)

4−1/2"

(108)

A B C

XP13−030−230 31 (787) 30−1/2 (775) 35 (889)

XP13−036−230 39 (991) 30−1/2 (775) 35 (889)

XP13−042−230 45 (1143) 30−1/2 (775) 35 (889)

XP13−048−230 35 (889) 30−1/2 (775) 35 (889)

XP13−060−230 39 (991) 30−1/2 (775) 35 (889)

UNIT SUPPORT

FEET

8−1/2
(216)

8−3/4
(222)

9−1/2
(241)

8−1/4
(210)

UNIT SUPPORT FEET

13−7/8

(352)

7−3/4
(197)

20−5/8

K

(524)

4−1/2

J

(114)

5−1/2
(140)

13−1/2

(343)

XP13−018 AND −024 BASE SECTION (SMALL)

STEP 1 −− SETTING THE UNIT (Continued)

−− Unit Placement

CAUTION

As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment.

Page 2

3−1/4

(83)

27−1/8

(689)

3−5/8

(92)

XP13−030 TO −060 BASE WITH ELONGATED

LEGS (MEDIUM)

NOTICE !

Roof Damage!
This system contains both refrigerant and oil. Some

rubber roofing material may absorb oil, causing the
rubber to degrade. Failure to follow this notice
could result in damage to roof surface.

WARNING

To prevent personal injury, as well as damage to panels,
unit or structure, observe the following:

While installing or servicing this unit, carefully stow all
removed panels so that the panels will not cause injury
to personnel, objects or nearby structures. Also, take
care to store panels where they will not be subject to
damage (e.g., being bent or scratched).

While handling or stowing the panels, consider any
weather conditions (especially wind) that may cause
panels to be blown around and damaged.

IMPORTANT !

Exhaust vents from dryers, water heaters and
furnaces should be directed away from the outdoor
unit. Prolonged exposure to exhaust gases and the
chemicals contained within them may cause
condensation to form on the steel cabinet and other
metal components of the outdoor unit. This will
diminish unit performance and longevity.

PLACEMENT

Install unit away from windows.

ELEVATED SLAB MOUNTING USING

FEET EXTENDERS

2" (50.8MM) SCH 40

FEMALE THREADED

ADAPTER

2" (50.8MM)
SCH 40 MALE
THREADED
ADAPTER

LEG DETAIL

Use additional 2" SCH 40 male
threaded adapters which can
be threaded into the female
threaded adapters to make
additional adjustments to the
level of the unit.

BASE

TWO 90° ELBOWS INSTALLED IN LINE SET

WILL REDUCE LINE SET VIBRATION.

FIGURE 2

SLAB MOUNTING

Install unit level or, if on a slope, maintain slope tolerance of 2
degrees (or 2 inches per 5 feet [50 mm per 1.5 m]) away from
building structure.

BUILDING

STRUCTURE

MOUNTING
SLAB

FIGURE 4

STABILIZING UNIT ON UNEVEN SURFACES

#10 X 1/2" LONG

SELF−DRILLING

SHEET METAL

SCREWS

STABILIZING BRACKET

(18 GAUGE METAL  2"

WIDTH; HEIGHT AS

REQUIRED)

#10 X 1−1/4" LONG

HEX HD SCREW AND

FLAT WASHER

Concrete slab  use two
plastic anchors (hole drill 1/4")

!

IMPORTANT !

CORNER POST

Unit Stabilizer Bracket Use

(field−provided):

Always use stabilizers when unit is raised
above the factory height.
(Elevated units could become unstable in
gusty wind conditions.)

Stabilizers may be used on any unit installed
on unstable and uneven surfaces.

COIL

BASE PAN

GROUND LEVEL

FIGURE 3

FIGURE 5

Page 3

XP13 SERIES

STEP 2 −− REFRIGERANT PIPING −− Flush­ing Existing Line Set & Indoor Coil

Flush the existing line set per the following instruc-

tions. For more information, refer to the Installation
and Service Procedures manual available on Dave­Net. CAUTION − DO NOT attempt to flush and re−use ex-
isting line sets or indoor coil when the system con­tains contaminants (i.e., compressor burn out).

NOTE − When installing refrigerant lines longer than 50
feet, refer to the Refrigerant Piping Design and Fabrication
Guidelines manual available on DaveNet (Corp. 9351−L9),
or contact the Technical Support Department Product Ap­plication group for assistance.

NOTE − For new or replacement line set installation, refer
to Service and Application Note − Corp. 9112−L4 (C−91−4).

TABLE 1

REFRIGERANT LINE SET  INCHES (MM)

WARNING

When using a high pressure gas such as
nitrogen to pressurize a refrigeration or air
conditioning system, use a regulator that
can control the pressure down to 1 or 2
psig (6.9 to 13.8 kPa).

WARNING

Refrigerant can be harmful if it is inhaled. Refrigerant
must be used and recovered responsibly.

Failure to follow this warning may result in personal injury
or death.

Field Connec-

Model

−018

−024

−030

−036

−042

−048

−060

NOTE  Some applications may required a field provided 7/8" to
1−1/8" adapter

Liquid
Line

3/8"
(10
mm)

3/8"
(10
mm)

3/8"
(10
mm)

tions

Suction
Line

3/4" (19
mm)

7/8" (22
mm)

1−1/8"
(29
mm)

Recommended Line Set

Liquid
Line

3/8"
(10
mm)

3/8"
(10
mm)

3/8"
(10
mm)

Suction
Line

3/4" (19
mm)

7/8" (22
mm)

1−1/8"
(29
mm)

L15 Line Set

L15−41  15 ft. −
50 ft. (4.6 m − 15
m)

L15−65  15 ft. −
50 ft. (4.6 m − 15
m)

Field Fabricated

IMPORTANT !

If this unit is being matched with an approved line
set or indoor unit coil that was previously charged
with mineral oil, or if it is being matched with a coil
which was manufactured before January of 1999,
the coil and line set must be flushed prior to installa­tion. Take care to empty all existing traps. Polyol es­ter (POE) oils are used in Lennox units charged with
HFC−410A refrigerant. Residual mineral oil can act
as an insulator, preventing proper heat transfer. It
can also clog the expansion device and reduce sys­tem performance and capacity.

Failure to properly flush the system per this instruc­tion and the detailed Installation and Service Proce­dures manual will void the warranty.

WARNING

Fire, Explosion and Personal Safety Haz­ard. Failure to follow this warning could re­sult in damage, personal injury or death.

Never use oxygen to pressurize or purge
refrigeration lines. Oxygen, when exposed
to a spark or open flame, can cause fire
and/or an explosion, that could result in
property damage, personal injury or death.

WARNING

Polyol ester (POE) oils used with HFC−410A
refrigerant absorb moisture very quickly. It is very
important that the refrigerant system be kept closed
as much as possible. DO NOT remove line set caps
or service valve stub caps until you are ready to make
connections.

IMPORTANT !

Some scroll compressors have an internal vacuum
protector that will unload scrolls when suction pres­sure goes below 20 psig. A hissing sound will be
heard when the compressor is running unloaded.
Protector will reset when low pressure in system is
raised above 40 psig. DO NOT REPLACE COM­PRESSOR.

Page 4

STEP 2 −− REFRIGERANT PIPING −− Removing Existing Indoor Metering Device

TYPICAL EXISTING FIXED ORIFICE

1A

DISTRIBUTOR

ASSEMBLY

A. On fully cased coils, remove the coil access and plumbing panels.
B. Remove any shipping clamps from the liquid line and distributor as-

sembly.

C. Using two wrenches, disconnect liquid line from liquid line orifice hous-

ing. Take care not to twist or damage distributor tubes during this pro­cess.

D. Remove and discard fixed orifice, valve stem assembly (if present)

and Teflon® washer as illustrated above.

E. Use a field−provided fitting to temporarily reconnect the liquid line to the

indoor unit’s liquid line orifice housing.

(UNCASED COIL SHOWN)

DISTRIBUTOR TUBES

LIQUID LINE ORIFICE HOUSING

TEFLON® RING

FIXED ORIFICE

REMOVE AND DISCARD

WHITE TEFLON

(IF PRESENT)

®

SEAL

LIQUID LINE ASSEMBLY

(INCLUDES STRAINER)

REMOVAL PROCEDURE

OR

BRASS NUT

1B

TWO−PIECE PATCH PLATE

(UNCASED COIL ONLY)

CONNECT GAUGES AND EQUIPMENT FOR
FLUSHING PROCEDURE

2

VAPOR LINE

SERVICE VALVE

EXISTING

INDOOR

UNIT

LIQUID LINE SERVICE

VALV E

RECOVERY

CYLINDER

LIQUID

D

A. HCFC−22 cylinder with clean refrigerant (positioned to deliver liquid

refrigerant) to the vapor service valve.

B. HCFC−22 gauge set (low side) to the liquid line valve.
C. HCFC−22 gauge set center port to inlet on the recovery machine with an

empty recovery tank connected to the gauge set.

D. Connect recovery tank to recovery machine per machine instructions.

CYLINDER CONTAINING
CLEAN HCFC−22 TO BE USED
FOR FLUSHING
(Positioned to deliver liquid

A

refrigerant)

1

OUTDOOR

B

VAPOR

NEW

UNIT

C

GAUGE

MANIFOLD

LOW HIGH

OPENED

TANK
RETURN

INLET

DISCHARGE

RECOVERY MACHINE

CLOSED

TYPICAL EXISTING EXPANSION VALVE REMOVAL
PROCEDURE (UNCASED COIL SHOWN)

ORIFICE

HOUSING

EQUALIZER
LINE

STUB END

TEFLON
RING

VAPOR

CHECK

EXPANSION

VALV E

®

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

LINE

TEFLON

RING

®

SENSING

LINE

LIQUID

LINE

LIQUID LINE

DISTRIBUTOR

TUBES

DISTRIBUTOR

ASSEMBLY

MALE EQUALIZER

LINE FITTING

SENSING BULB

A. On fully cased coils, remove the coil access and plumbing panels.
B. Remove any shipping clamps from the liquid line and distributor

assembly.

C. Disconnect the equalizer line from the check expansion valve

equalizer line fitting on the vapor line.

D. Remove the vapor line sensing bulb.
E. Disconnect the liquid line from the check expansion valve at the

liquid line assembly.

F. Disconnect the check expansion valve from the liquid line orifice

housing. Take care not to twist or damage distributor tubes during
this process.

G. Remove and discard check expansion valve and the two Teflon

rings.

H. Use a field−provided fitting to temporarily reconnect the liquid line to

the indoor unit’s liquid line orifice housing.

FLUSHING LINE SET

The line set and indoor unit coil must be flushed with at least the same

3

amount of clean refrigerant that previously charged the system. Check
the charge in the flushing cylinder before proceeding.

A. Set the recovery machine for liquid recovery and start the recovery

machine. Open the gauge set valves to allow the recovery
machine to pull a vacuum on the existing system line set and indoor

B

unit coil.

B. Position the cylinder of clean HCFC−22 for delivery of liquid

refrigerant and open its valve to allow liquid refrigerant to flow into
the system through the vapor line valve. Allow the refrigerant to
pass from the cylinder and through the line set and the indoor unit
coil before it enters the recovery machine.

C. After all of the liquid refrigerant has been recovered, switch the

recovery machine to vapor recovery so that all of the HCFC−22
vapor is recovered. Allow the recovery machine to pull the system
down to 0.

D. Close the valve on the inverted HCFC−22 drum and the gauge set

valves. Pump the remaining refrigerant out of the recovery
machine and turn the machine off.

®

FIGURE 6

Page 5

XP13 SERIES

STEP 2 −− REFRIGERANT PIPING −− Brazing Procedures

CUT AND DEBUR

Cut ends of the refrigerant lines square (free from nicks or dents)

1

and debur the ends. The pipe must remain round. Do not crimp end
of the line.

CUT AND DEBUR

LINE SET SIZE MATCHES

SERVICE VALVE CONNECTION

SERVICE VALVE

COPPER TUBE

REDUCER

CONNECTION

STUB

LINE SET SIZE IS SMALLER

THAN CONNECTION

REFRIGERANT LINE

DO NOT CRIMP SERVICE VALVE

CONNECTOR WHEN PIPE IS

SMALLER THAN CONNECTION

CAP AND CORE REMOVAL

Remove service cap and core from

2

both the suction / vapor and liquid line
service ports.

SERVICE PORT

CAP

SERVICE

PORT
CORE

LIQUID LINE SERVICE

VALV E

SUCTION / VAPOR LINE

SERVICE VALVE

ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND SUCTION / VAPOR LINE SERVICE
VALVES

3

Flow regulated nitrogen (at 1 to 2 psig) through the low−side refrigeration gauge set into the liquid line service port valve, and out of the suction /
vapor line service port valve.

A. Connect gauge set low pressure side to

liquid line service valve (service port).

B. Connect gauge set center port to bottle of

nitrogen with regulator.

C. Remove core from valve in suction / vapor

line service port to allow nitrogen to escape.

ATTACH

GAUGES

HIGHLOW

USE REGULATOR TO FLOW

NITROGEN AT 1 TO 2 PSIG.

SERVICE

PORT
CORE

SERVICE
PORT CAP

SUCTION / VAPOR SERVICE PORT MUST BE

OPEN TO ALLOW EXIT POINT FOR NITROGEN

VAPOR LINE

INDOOR

UNIT

LIQUID LINE

C

LIQUID LINE SERVICE

SUCTION /

VAPOR LINE

VALV E

CAUTION

Brazing alloys and flux contain materials which are
hazardous to your health.

Avoid breathing vapors or fumes from brazing
operations. Perform operations only in well−ventilated
areas.

Wear gloves and protective goggles or face shield to
protect against burns.
Wash hands with soap and water after handling brazing
alloys and flux.

SERVICE

VALV E

A

FIGURE 7

B

OUTDOOR

UNIT

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

WARNING

Danger of fire. Bleeding the refrigerant
charge from only the high side may result
in pressurization of the low side shell and
suction tubing. Application of a brazing
torch to a pressurized system may result
in ignition of the refrigerant and oil
mixture. Check the high and low
pressures before applying heat.

NITROGEN

Page 6

WRAP SERVICE VALVES

To help protect service valve seals during brazing, wrap water−saturated cloths around service valve bodies and copper tube stubs. Use

4

additional water−saturated cloths underneath the valve body to protect the base paint.

FLOW NITROGEN

Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and

5

out of the suction / vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set connections.

BRAZE LINE SET

Wrap both service valves with water−saturated cloths as illustrated here and as mentioned in step 4, before brazing to line set. Cloths must

6

remain water−saturated throughout the brazing and cool−down process.

LIQUID LINE SERVICE VALVE

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

IMPORTANT  Allow braze joint to cool. Apply

additional water−saturated cloths to help cool brazed
joint. Do not remove water−saturated cloths until
piping has cooled. Temperatures above 250ºF will
damage valve seals.

LIQUID LINE

WATER−SATURATED
CLOTH

WARNING

FIRE, PERSONAL INJURY, OR PROPERTY DAMAGE

may result if you do not wrap a water−saturated cloth around
both liquid and suction line service valve bodies and copper
tube stub while brazing the line set! The braze, when
complete, must be quenched with water to absorb any
residual heat.

Do not open service valves until refrigerant lines and
indoor coil have been leak−tested and evacuated. Refer
to Installation and Service Procedures manual found on
DAVENET.

SUCTION / VAPOR LINE

PREPARATION FOR NEXT STEP

After all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water−saturated cloths to both

7

services valves to cool piping. Once piping is cool, remove all water−saturated cloths.

SUCTION / VAPOR LINE

SERVICE VALVE

WATER−SATURATED
CLOTH

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

FIGURE 7 (CONTINUED)

Page 7

XP13 SERIES

STEP 3 −− INSTALLING INDOOR EXPANSION VALVE

This outdoor unit is designed for use in systems that include an check/expansion valve metering device. See the XP13
Product Specifications bulletin (EHB) for approved check/expansion valve kit match−ups and application information. The

check/expansion valve can be installed internal or external to the indoor coil. In applications where an uncased coil is being
installed in a field−provided plenum, install the check/expansion valve in a manner that will provide access for future field
service of the check expansion valve. Refer to below illustration for reference during installation of check/expansion valve.

INDOOR EXPANSION VALVE INSTALLATION

TWO PIECE

PATCH PLATE

(UNCASED

COIL ONLY)

DISTRIBUTOR

TUBES

DISTRIBUTOR

ASSEMBLY

MALE EQUALIZER LINE

FITTING (SEE

EQUALIZER LINE
INSTALLATION FOR
FURTHER DETAILS)

(Uncased Coil Shown)

LIQUID LINE

ORIFICE

HOUSING

STUB

END

TEFLON
RING

EQUALIZER
LINE

VAPOR

CHECK

EXPANSION

VALV E

®

ASSEMBLY WITH

LINE

TEFLON

RING

LIQUID LINE

BRASS NUT

LIQUID LINE

Sensing bulb insulation is required if
mounted external to the coil casing. sensing
bulb installation for bulb positioning.

EQUALIZER LINE INSTALLATION

A. Remove and discard either the flare seal cap or flare nut

with copper flare seal bonnet from the equalizer line port
on the vapor line as illustrated in the figure below.

B. Remove the field−provided fitting that temporarily recon-

nected the liquid line to the indoor unit’s distributor assemb­ly.

®

SENSING

LINE

C. Install one of the provided Teflon® rings around the

stubbed end of the check expansion valve and lightly
lubricate the connector threads and expose surface of
the Teflon® ring with refrigerant oil.

D. Attach the stubbed end of the check expansion valve to

the liquid line orifice housing. Finger tighten and use an
appropriately sized wrench to turn an additional 1/2 turn
clockwise as illustrated in the figure above, or or tighten
to 20 ft−lb.

E. Place the remaining Teflon® washer around the other

end of the check expansion valve. Lightly lubricate
connector threads and expose surface of the Teflon
ring with refrigerant oil.

F. Attach the liquid line assembly to the check expansion

valve. Finger tighten and use an appropriately sized
wrench to turn an additional 1/2 turn clockwise as
illustrated in the figure above or tighten to 20 ft−lb.

SENSING BULB INSTALLATION

A. Attach the vapor line sensing bulb in the proper

orientation as illustrated to the right using the clamp and
screws provided.

NOTE  Confirm proper thermal contact between vapor line
and check expansion bulb before insulating the sensing bulb
once installed.

B. Connect the equalizer line from the check expansion

valve to the equalizer vapor port on the vapor line. Finger
tighten the flare nut plus 1/8 turn (7 ft−lbs) as illustrated
below.

VAPOR LINE

BULB

12

ON LINES SMALLER THAN
7/8", MOUNT SENSING
BULB AT EITHER THE 3 OR
9 O’CLOCK POSITION.

BULB

®

1/2 Turn

11

10

9

8

7

1/8 Turn

11

10

9

8

7

12

1

2

3

4

5

6

12

1

2

3

4

5

6

FLARE SEAL CAP

OR

FLARE NUT

COPPER FLARE
SEAL BONNET

MALE BRASS EQUALIZER
LINE FITTING

VAPOR LINE

FIGURE 8

Page 8

VAPOR LINE

12

BULB

NOTE  NEVER MOUNT THE SENSING BULB

ON BOTTOM OF LINE.

ON 7/8" AND LARGER LINES,
MOUNT SENSING BULB AT
EITHER THE 4 OR 8 O’CLOCK
POSITION. NEVER MOUNT
THE SENSING BULB ON
BOTTOM OF LINE.

BULB

STEP 4 −− LEAK TEST AND EVACUATION

HIGHLOW

MANIFOLD GAUGE SET

OUTDOOR UNIT

1

2

B

TO VAPOR

SERVICE VALVE

NOTE − Position
canister to deliver
liquid refrigerant.

NITROGEN

CONNECT GAUGE SET

A Connect the high pressure hose of an HFC−410A manifold gauge set to the vapor valve service port.

NOTE  Normally, the high pressure hose is connected to the liquid line port. However, connecting it

to the vapor port better protects the manifold gauge set from high pressure damage.

B With both manifold valves closed, connect the cylinder of HFC−410A refrigerant to the center port of

the manifold gauge set.

NOTE  Later in the procedure, the HFC−410A container will be replaced by the nitrogen container.

TEST FOR LEAKS

After the line set has been connected to the indoor and outdoor units, check the line set connections
and indoor unit for leaks. Use the following procedure to test for leaks:

A With both manifold valves closed, connect the cylinder of HFC−410A refrigerant to the center port of

the manifold gauge set. Open the valve on the HFC−410A cylinder (vapor only).

B Open the high pressure side of the manifold to allow HFC−410A into the line set and indoor unit.

Weigh in a trace amount of HFC−410A. [A trace amount is a maximum of two ounces (57 g) refriger-
ant or three pounds (31 kPa) pressure.] Close the valve on the HFC−410A cylinder and the valve on
the high pressure side of the manifold gauge set. Disconnect the HFC−410A cylinder.

C Connect a cylinder of nitrogen with a pressure regulating valve to the center port of the manifold

gauge set.

D Adjust nitrogen pressure to 150 psig (1034 kPa). Open the valve on the high side of the manifold gauge

set in order to pressurize the line set and the indoor unit.

E After a few minutes, open one of the service valve ports and verify that the refrigerant added to the

system earlier is measurable with a leak detector.

F After leak testing, disconnect gauges from service ports.

HFC−410A

A

FIGURE 9

Page 9

XP13 SERIES

STEP 4 −− LEAK TEST AND EVACUATION (Continued)

CONNECT GAUGE SET

NOTE  Remove cores from service valves (if not already done).

3

A Connect low side of manifold gauge set with

1/4 SAE in−line tee to vapor line service valve

B Connect high side of manifold gauge set to

liquid line service valve

C Connect available micron gauge connector

on the 1/4 SAE in−line tee.

D Connect the vacuum pump (with vacuum

gauge) to the center port of the manifold
gauge set. The center port line will be used
later for both the HFC−410A and nitrogen
containers.

NITROGEN

NOTE − Position
canister to deliver
liquid refrigerant.

HFC−410A

VACUUM PUMP

OUTDOOR

UNIT

EVACUATION

1/4 SAE TEE WITH SWIVEL

A

COUPLER

C

B

500

MICRON

GAUGE

GAUGE SET

TO VAPOR

SERVICE VALVE

TO LIQUID LINE
SERVICE VALVE

LOW

MANIFOLD

D

EVACUATE THE SYSTEM

4

A Open both manifold valves and start the vacuum pump.
B Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury).

NOTE  During the early stages of evacuation, it is desirable to close the manifold gauge valve at least once. A rapid rise in pressure indicates a
relatively large leak. If this occurs, repeat the leak testing procedure.

NOTE  The term absolute pressure means the total actual pressure above absolute zero within a given volume or system. Absolute pressure
in a vacuum is equal to atmospheric pressure minus vacuum pressure.

C When the absolute pressure reaches 23,000 microns (29.01 inches of mercury),

perform the following:

S Close manifold gauge valves.
S Close valve on vacuum pump.
S Turn off vacuum pump.

S Disconnect manifold gauge center port hose from vacuum pump.
S Attach manifold center port hose to a nitrogen cylinder with pressure

regulator set to 150 psig (1034 kPa) and purge the hose.

S Open manifold gauge valves to break the vacuum in the line set and indoor

unit.

S Close manifold gauge valves.

D 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.

E Reconnect the manifold gauge to the vacuum pump, turn the pump on, and continue to evacuate the line set and indoor unit until the absolute

pressure does not rise above 500 microns (29.9 inches of mercury) within a 20−minute period after shutting off the vacuum pump and closing
the manifold gauge valves.

F When the absolute pressure requirement above has been met, disconnect the manifold hose from the vacuum pump and connect it to a

cylinder of HFC−410A positioned to deliver liquid refrigerant. Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line
set and indoor unit.

G Perform the following:

S Close manifold gauge valves.
S Shut off HFC−410A cylinder.

S Reinstall service valve cores by removing manifold hose from service valve. Quickly install cores with core

tool while maintaining a positive system pressure.

S Replace stem caps and finger tighten them, then tighten an additional one−sixth (1/6) of a turn as illustrated.

Possible equipment damage.

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

WARNING !

RECOMMEND

MINIMUM 3/8" HOSE

1/6 TURN

11

10

9

8

7

HIGH

12

1

2

3

4

5

6

FIGURE 10

Page 10

STEP 5 −− ELECTRICAL −− Circuit Sizing and Wire Routing

In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC).

Refer to the furnace or air handler installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.

24VAC TRANSFORMER

Use the transformer provided with the furnace or air han­dler for low-voltage control power (24VAC − 40 VA mini­mum)

WARNING

Electric Shock Hazard. Can cause injury
or death. Unit must be grounded in
accordance with national and local
codes.

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.

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.

ELECTROSTATIC

DISCHARGE

(ESD)

Precautions and

Procedures

IMPORTANT !

CAUTION

Electrostatic discharge can affect
electronic components. Take care
during unit installation and service to
protect the unit’s electronic controls.
Precautions will help to avoid control
exposure to electrostatic discharge by
putting the unit, the control and the
technician at the same electrostatic
potential. Touch hand and all tools on an
unpainted unit surface before
performing any service procedure to
neutralize electrostatic charge.

SIZE CIRCUIT AND INSTALL DISCONNECT
SWITCH

1

Refer to the unit nameplate for minimum circuit ampacity, and
maximum fuse or circuit breaker (HACR per NEC). Install power
wiring and properly sized disconnect switch.

NOTE  Units are approved for use only with copper conductors.
Ground unit at disconnect switch or connect to an earth ground.

MAIN FUSE

BOX/BREAKER

PANEL

DISCONNECT

SWITCH

FIGURE 11

INSTALL THERMOSTAT

Install room thermostat (ordered separately) on an inside wall

2

approximately in the center of the conditioned area and 5 feet
(1.5m) from the floor. It should not be installed on an outside wall
or where it can be affected by sunlight or drafts.

THERMOSTAT

5 FEET

(1.5M)

NOTE  24VAC, Class II circuit connections are made in the control
panel.

Page 11

XP13 SERIES

Unit Low Voltage Wiring

3

A

THERMOSTAT INDOOR UNIT

24V POWER

R

C

COMMON

W1

1ST-STAGE

AUXILIARY

HEAT

G

INDOOR BLOWER

O

REVERSING VALVE

Y1

COMPRESSOR

(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)

C

CUTOUT WITH

GROMMET

24V CONTROL WIRES

Typical 24VAC Control Wiring Diagrams (Field Installed)

R

24V POWER

C

COMMON

W1

1ST-STAGE

W2

W3

AUXILIARY

HEAT

G

WIRE NUTS

BLACK

B

OUTDOOR UNIT

YELLOW

R

C

W1

O

Y1

D

TIGHTEN WIRE TIE

FIGURE 12

HIGH VOLTAGE FIELD WIRING

FACTORY WIRING

LOW VOLTAGE (24V) FIELD WIRING

WIRE RUN LENGTH AWG# INSULATION TYPE

LESS THAN 100’ (30 METERS) 18 TEMPERATURE RATING

MORE THAN 100’ (30 METERS) 16 35ºC MINIMUM.

A Run 24VAC control wires through cutout with grommet.
B Run 24VAC control wires through wire tie.
C Make 24VAC control wire connections using field provided wire

nuts.

D Tighten wire tie to security 24V control wiring.

NOTE − FOR PROPER VOLTAGES, SELECT THERMOSTAT WIRE (CONTROL WIRES)
GAUGE PER TABLE ABOVE.

NOTE − WIRE TIE PROVIDES LOW VOLTAGE WIRE STRAIN RELIEF AND MAINTAINS
SEPARATION OF FIELD−NSTALLED LOW AND HIGH VOLTAGE CIRCUITS.

NOTE − DO NOT BUNDLE ANY EXCESS 24VAC CONTROL WIRES INSIDE CONTROL
BOX.

THERMOSTAT

R

24V POWER 24V POWER

C

COMMON

E

EMERGENCY

HEAT

W1

1ST-STAGE
AUXILIARY

HEAT

G

INDOOR BLOWER

O

REVERSING VALVE

Y1

COMPRESSOR

(SOME CONNECTIONS MAY NOT APPLY. REFER TO
SPECIFIC THERMOSTAT AND INDOOR UNIT.)

INDOOR UNIT OUTDOOR UNIT

W1

W2

W3

R

C

G

COMMON

1ST-STAGE
AUXILIARY

HEAT

R

C

W1

O

Y1

EMERGENCY

HEAT RELAY

OUTDOOR
THERMOSTAT

WARNING! − ELECTRIC SHOCK HAZARD. Can cause INJU­RY or DEATH. Unit must be grounded in accordance with
national and local codes.

NOTE − For use with copper conductors only. Refer to unit
rating plate for minimum circuit ampacity and maximum over­current protection size.

FIGURE 13

Page 12

Charging

The XP13 unit is factory−charged with enough HFC−410A
refrigerant to accommodate a 15−foot length of refrigerant
piping. Charge should be checked and adjusted using the
tables provided on the charging procedure sticker on the
unit access panel. Detailed information is given in the
XP13 Installation and Service Procedures manual, which
is available on DaveNet.

Defrost System

The defrost system includes a defrost thermostat (S6) and
a defrost control (CMC1).

DEFROST CONTROL (CMC1)

This defrost control includes the combined functions of a
time/temperature defrost control, defrost relay, time delay,
diagnostic LEDs, and a terminal strip for field wiring con­nections.

DEFROST CONTROL (CMC1)

DEFROST TIMING

PINS (P1)

TEST

PINS

DIAGNOSTIC

COMPRESSOR

DELAY PINS

REVERSING

VALV E

S87

LOW PRESSURE

SWITCH

DEFROST

THERMOSTAT (S6)

S4

HIGH PRESSURE

SWITCH

FIGURE 14

The defrost control provides automatic switching from nor­mal heating operation to defrost mode and back. When the
defrost thermostat is closed, the control accumulates com­pressor run time at 30, 60 or 90 minute field adjustable in­tervals. When the selected compressor run time interval is
reached, the defrost relay is energized and defrost begins.

Defrost Control Timing Pins (P1)

Each timing pin selection provides a different accumu­lated compressor run time period for one defrost 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 (see figure 14). The maximum
defrost period is 14 minutes and cannot be adjusted.

NOTE  Defrost control part number is listed near the P1
timing pins.

S Factory default is 90 minutes.
S If the timing selector jumper is missing, the defrost

control defaults to a 90−minute defrost interval.

LEDS

24V TERMINAL
STRIP
CONNECTIONS

SERVICE LIGHT
CONNECTIONS

Compressor Delay (P5)

The defrost control 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 installed.

NOTE  The 30-second compressor feature is ignored
when jumpering the TEST pins.

Time Delay

The timed-off delay is five 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.

Test Mode (P1)

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

defrost control will ignore the test pins. When the jumper is
placed across the TEST pins for two seconds, the defrost
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 re−applied.

Service Light Connection

The defrost control includes terminal connections for a ser­vice light which provides a signal that activates the room
thermostat service light during periods of inefficient opera­tion.

Defrost Control Diagnostic LEDs

The defrost board uses two LEDs for diagnostics. The
LEDs flash a specific sequence according to the condition.

TABLE 2

DEFROST CONTROL (CMC1) DIAGNOSTIC LEDS

Mode Green LED (DS2) Red LED (DS1)

No power to con­trol

Normal operation /
power to control

Anti-short cycle
lockout

High pressure
switch fault

High pressure
switch lockout

OFF OFF

Simultaneous Slow FLASH

Alternating Slow FLASH

Slow FLASH OFF

ON OFF

HIGH PRESSURE SWITCH (S4)

This unit is equipped with a high pressure switch which is
located on the liquid line. The SPST, normally closed pres­sure switch opens when liquid line pressure rises above
the factory setting of 590 + 15 psig and automatically re­sets at 418 + 15 psig.

Page 13

XP13 SERIES

Start−Up and Performance Checklist

Customer Address

Indoor Unit Model Serial

Outdoor Unit Model Serial

Notes:

START UP CHECKS

Refrigerant Type:

Rated Load Amps: Actual Amps Rated Volts

Condenser Fan Full Load Amps Actual Amps:

COOLING MODE

Suction Pressure: Liquid Pressure:

Supply Air Temperature: Ambient Temperature: Return Air: Temperature:

System Refrigerant Charge (Refer to manufacturer’s information on unit or installation instructions for required
subcooling and approach temperatures.)

Subcooling:

Saturated Condensing Temperature (A)

minus Liquid Line Temperature (B)

Approach:

Liquid Line Temperature (A)

minus Outdoor Air Temperature (B)

Indoor Coil Temperature Drop (18 to 22°F)

Return Air Temperature (A)

minus Supply Air Temperature (B)

A  B = SUBCOOLING

A  B = APPROACH

A  B = COIL TEMP DROP

Actual Volts

Page 14

Homeowners Information

Cleaning of the outdoor unit’s coil should be performed by
a licensed professional service technician (or equivalent).
Contact your dealer and set up a schedule (preferably
twice a year, but at least once a year) to inspect and ser­vice your outdoor unit. The following maintenance may be
performed by the homeowner.

IMPORTANT !

Sprinklers and soaker hoses should not be installed
where they could cause prolonged exposure to the
outdoor unit by treated water. Prolonged exposure
of the unit to treated water (i.e., sprinkler systems,
soakers, waste water, etc.) will corrode the surface
of steel and aluminum parts, diminish performance
and affect longevity of the unit.

Outdoor Coil

The outdoor unit must be properly maintained to ensure its
proper operation.

S Please contact your dealer to schedule proper inspec-

tion and maintenance for your equipment.

S Make sure no obstructions restrict airflow to the outdoor

unit.

S Grass clippings, leaves, or shrubs crowding the unit can

cause the unit to work harder and use more energy.

S Keep shrubbery trimmed away from the unit and periodi-

cally check for debris which collects around the unit.

S Keep snow level below the louvered panels to ensure

proper performance.

Routine Maintenance

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.

NOTE  The filter and all access panels must be in place
any time the unit is in operation. If you are unsure about the
filter required for your system, call your Lennox dealer for
assistance.

S Ask your Lennox dealer to show you where your 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.

S Disposable filters should be replaced with a filter of the

same type and size.

S The indoor evaporator coil is equipped with a drain pan

to collect condensate formed as your 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 would also apply to an auxiliary
drain, if installed.)

Thermostat Operation

See the ComfortSense® 7000 thermostat homeowner
manual for instructions on how to operate your thermostat.

Heat Pump Operation

Your new Lennox heat pump has several characteristics
that you should be aware of:

S Heat pumps satisfy heating demand by delivering

large amounts of warm air into the living space. This
is quite different from gas- or oil-fired furnaces or an
electric furnace which deliver lower volumes of consid­erably hotter air to heat the space.

S 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 (7C). An electronic control activates a de-
frost cycle lasting 5 to 15 minutes at preset intervals
to clear the outdoor coil of the frost.

S During the defrost cycle, you may notice steam rising

from the outdoor unit. This is a normal occurrence. The
thermostat may engage auxiliary heat during the de­frost cycle to satisfy a heating demand; however, the
unit will return to normal operation at the conclusion of
the defrost cycle.

Extended Power Outage

The heat pump is equipped with a compressor crankcase
heater which protects the compressor from refrigerant
slugging during cold weather operation.

If power to your unit has been interrupted for several hours
or more, set the room thermostat selector to the EMER­GENCY HEAT setting to obtain temporary heat without the
risk of serious damage to the heat pump.

In EMERGENCY HEAT mode, all heating demand is satis­fied by auxiliary heat; heat pump operation is locked out.
After a six-hour compressor crankcase warm-up period,
the thermostat can be switched to the HEAT setting and
normal heat pump operation may resume.

Preservice Check

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

S Verify room thermostat settings are correct.
S Verify that all electrical disconnect switches are ON.
S Check for any blown fuses or tripped circuit breakers.
S Verify unit access panels are in place.
S Verify air filter is clean.
S If service is needed, locate and write down the unit

model number and have it handy before calling.

Page 15

XP13 SERIES