Lennox XP14-018-230-01, XP14-018-230-08, XP14-018-230-03, XP14-018-230-07, XP14-018-230-09 Nstallation And Service Instructions

INSTALLATION AND SERVICE

PROCEDURE

Service Literature

XP14 (HFC-410A) SERIES UNITS

Revised April 7, 2017

WARNING

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

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

CAUTION

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

XP14

Corp. 0721-L7

TABLE OF CONTENTS

Model Number Identification 2....................

Typical Serial Number Identification 2..............

Specifications 2.................................

Electrical Data 4................................

Unit Dimensions 7...............................

Unit Parts Arrangement 8........................

Operating Gauge Set and Service Valves 10.........

Recovering Refrigerant from System 12.............

Unit Placement 13................................

Removing and Installing Panels 15.................

New or Replacement Line Set 17...................

Brazing Connections 19...........................

Flushing Line Set and Indoor Coil 22................

Installing Indoor Metering Device 23................

Leak Test Line Set and Indoor Coil 24...............

Evacuating Line Set and Indoor Coil 25.............

Electrical 26.....................................

Servicing Units Void of Charge 27..................

Unit Start-Up 27.................................

System Refrigerant 27............................

System Operation (XP14-XXX-230-01 through 07) 34.
Defrost System (XP14-XXX-230-01 through 07) 36...
System Operation (XP14-XXX-230-08 and later) 34...

Defrost System (XP14-XXX-230-08 and later) 36.....

Maintenance 42..................................

Start-up and Performance Checklist 47.............

Unit Wiring Diagram and Sequence of

Operations 43....................................

The XP14 is a high efficiency residential split-system heat
pump unit, which features a scroll compressor and
HFC-410A refrigerant. XP14 units are available in sizes
ranging from 1-1/2 through 5 tons. The series is designed
for use with an indoor unit with an check expansion valve
approved for HFC-410A.

IMPORTANT

The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.

Page 1

This unit must be matched with an indoor coil as
specified in Lennox XP14 Engineering Handbook.
Coils previously charged with HCFC-22 must be
flushed.

IMPORTANT

Model Number Identification

P 14 XXX− −

X 2

Refrigerant Type

X = HFC-410A

Unit Type

P = Heat Pump Outdoor Unit

Series

Typical Serial Number Identification

Location Code

19 = Saltillo, Mexico

58 = Marshalltown, IA

Year Code

08 = 2008
09 = 2009
10 = 2010

19 09 C

Specifications

−0

230

Voltage

230 = 208/230V-1ph-60hz

Nominal Cooling Capacity

018 = 1.5 tons
024 = 2 tons
030 = 2.5 tons
036 = 3 tons
042 = 3.5 tons
048 = 4 tons
060 = 5 tons

05716

Month Code

A = January
B = February
C = March

Minor Revision Number

5 (or 6) Digit Unique Number

Unit Outdoor Fan

Model Number

XP14-018-230-01, -03, -06, -07 71 8 lbs. 4 oz. 3 18

XP14-018-230-08 71 6 lbs. 11 oz. 3 18

XP14-018-230-09 71

1

Tested according to AHRI Standard 270-2008 test conditions.

2

Refrigerant charge sufficient for 15 feet of line set.

3

Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

Model Number

XP14-024-230-01, -03, -06, -07 71 8 lbs. 0 oz. 3 18

XP14-024-230-08 71 6 lbs. 4 oz. 3 18

XP14-024-230-09 71

1

Tested according to AHRI Standard 270-2008 test conditions.

2

Refrigerant charge sufficient for 15 feet of line set.

3

Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

Model Number

XP14-030-230-01 through -07 71 7 lbs. 2 oz. 3 18

XP14-030-230-08 71 6 lbs. 0 oz. 3 18

XP14-030-230-09 71

1

Tested according to AHRI Standard 270-2008 test conditions.

2

Refrigerant charge sufficient for 15 feet of line set.

3

Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

Sound Rating Number

Sound Rating Number

Sound Rating Number

(dB)

(dB)

(dB)

1

1

1

Factory Refrigerant

6 lbs. 11 oz. or

5 lbs. 11 oz.

Unit Outdoor Fan

Factory Refrigerant

6 lbs. 4 oz. or

5 lbs. 14 oz.

Unit Outdoor Fan

Factory Refrigerant

6 lbs. 0 oz. or

5 lbs. 10 oz.

Charge

Charge

Charge

2

3

2

3

2

3

Number of Blades Diameter - inches.

3 18

Number of Blades Diameter - inches.

3 18

Number of Blades Diameter - inches.

3 18

Page 2

Unit Outdoor Fan

Model Number

Sound Rating Number

(dB)

1

Factory Refrigerant

Charge

2

Number of Blades Diameter - inches.

XP14-036-230-01, -02, -08, -09 71 9 lbs. 12 oz. 3 22

XP14-036-230-10 71

1

Tested according to AHRI Standard 270-2008 test conditions.

2

Refrigerant charge sufficient for 15 feet of line set.

3

Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

9 lbs. 12 oz. or

9 lbs. 6 oz.

3

3 22

Unit Outdoor Fan

Model Number

Sound Rating Number

(dB)

1

Factory Refrigerant

Charge

2

Number of Blades Diameter - inches.

XP14-042-230-01, -02 71 12 lbs. 7 oz. 4 26

XP14-042-230-08 71 11 lbs. 14 oz. 3 26

XP14-042-230-09 71

1

Tested according to AHRI Standard 270-2008 test conditions.

2

Refrigerant charge sufficient for 15 feet of line set.

3

Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

11 lbs. 14 oz. or

11 lbs. 8 oz.

3

3 26

Unit Outdoor Fan

Model Number

Sound Rating Number

(dB)

1

Factory Refrigerant

Charge

2

Number of Blades Diameter - inches.

XP14-048-230-01 73 12 lbs. 10 oz. 4 26

XP14-048-230-08 73 10 lbs. 7 oz. 3 26

XP14-048-230-09 73

1

Tested according to AHRI Standard 270-2008 test conditions.

2

Refrigerant charge sufficient for 15 feet of line set.

3

Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

10 lbs. 7 oz. or

10 lbs. 1 oz.

3

3 26

Unit Outdoor Fan

Model Number

Sound Rating Number

(dB)

1

Factory Refrigerant

Charge

2

Number of Blades Diameter - inches.

XP14-060-230-01 73 16 lbs. 0 oz. 4 26

XP14-060-230-08 73 12 lbs. 11 oz. 3 26

XP14-060-230-09 73

1

Tested according to AHRI Standard 270-2008 test conditions.

2

Refrigerant charge sufficient for 15 feet of line set.

3

Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

12 lbs. 11 oz. or

12 lbs. 5 oz.

3

3 26

Page 3

XP14 SERIES

Electrical Data

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Maximum

Model Number Label Rev.

XP14-018-230-01

XP14-018-230-02 1.0 20 11.9 8.97 48.0 1/10 1075 0.7 1.4

XP14-018-230-03 1.0 20 11.9 8.97 48.0 1/10 1075 0.7 1.4

XP14-018-230-06 1.0 20 11.9 8.97 48.0 1/10 1075 0.7 1.4

XP14-018-230-07

XP14-018-230-08

XP14-018-230-09

Model Number Label Rev.

XP14-024-230-01 1.0 & 2.0 30 17.5 13.46 58.0 1/10 1075 0.7 1.4

XP14-024-230-02 1.0 30 17.5 13.46 58.0 1/10 1075 0.7 1.4

XP14-024-230-03 1.0 30 17.5 13.46 58.0 1/10 1075 0.7 1.4

XP14-024-230-06 1.0 30 17.5 13.46 58.0 1/10 1075 0.7 1.4

XP14-024-230-07

XP14-024-230-08

XP14-024-230-09

1.0, 2.0 &

3.0

1.0 20 11.9 8.97 48.0 1/10 1075 0.7 1.4

2.0 20 12.3 9.00 48.0 1/10 1075 0.7 1.4

3.0 20 12.2 9.00 48.0 1/10 1075 0.7 1.4

1.0 20 11.9 8.97 48.0 1/10 1075 0.7 1.87

2.0 20 12.3 8.96 48.0 1/6 825 1.1 1.87

3.0 20 12.3 8.96 48.0 1/6 825 1.1 1.87

1.0 20 12.3 8.96 48.0 1/6 825 1.1 1.87

2.0 20 12.3 9.00 48.0 1/6 825 1.1 1.87

3.0 20 12.2 9.00 48.0 1/6 825 1.0 1.87

1.0 30 17.5 13.46 58.0 1/10 1075 0.7 1.4

2.0 30 17.9 13.50 58.0 1/10 1075 0.7 1.4

3.0 30 17.8 13.50 58.0 1/10 1075 0.7 1.4

1.0 30 17.5 13.46 58.0 1/10 1075 0.7 1.4

2.0, 3.0 &

4.0

1.0 & 2.0 30 17.9 13.44 58.0 1/6 825 1.1 1.87

3.0 30 17.9 13.50 58.0 1/6 825 1.1 1.87

Over-

current

Protection

(amps)

20 11.9 8.97 48.0 1/10 1075 0.7 1.4

Maximum

Over-

current

Protection

(amps)

30 17.9 13.44 58.0 1/6 825 1.1 1.87

Minimum

Circuity

Ampacity

1

Unit Compressor Condenser Fan

Minimum

Circuity

Ampacity

1

Rated

Load

Amps

2

(RLA)

208/230V-60 Hz-1 Ph

Rated

Load

Amps

2

(RLA)

Locked

Rotor
Amps
(LRA)

Locked

Rotor
Amps
(LRA)

Motor HP

Motor HP

Nominal

RPM

Nominal

RPM

Full Load

Amps
(FLA)

Full Load

Amps
(FLA)

Locked

Rotor
Amps

(LRA)

Locked

Rotor
Amps
(LRA)

Page 4

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

XP14-030-230-01

1.0, 2.0 &

3.0

Maximum

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

30 17.0 13.1 64.0 1/10 1075 0.7 1.4

Rated

Load

Amps

2

(RLA)

Locked

Rotor
Amps

(LRA)

Motor HP

Nominal

RPM

Full Load

Amps
(FLA)

Locked

Rotor
Amps
(LRA)

XP14-030-230-02 1.0 30 17.0 13.1 64.0 1/10 1075 0.7 1.4

XP14-030-230-03 1.0 30 17.0 13.1 64.0 1/10 1075 0.7 1.4

XP14-030-230-05

1.0 30 17.0 13.1 64.0 1/10 1075 0.7 1.4

2.0 30 19.4 14.1 64.0 1/10 1075 0.7 1.4

XP14-030-230-06 1.0 30 17.0 13.1 64.0 1/10 1075 0.7 1.4

1.0 30 17.0 13.1 64.0 1/10 1075 0.7 1.4

XP14-030-230-07

2.0 30 17.5 13.1 64.0 1/10 1075 0.7 1.4

3.0 30 17.4 13.1 64.0 1/10 1075 0.7 1.4

XP14-030-230-08

1.0 30 17.0 13.1 64.0 1/10 1075 0.7 1.4

2.0 & 3.0 25 17.1 12.8 64.0 1/6 825 1.1 1.87

1.0 25 17.1 12.8 64.0 1/6 825 1.1 1.87

XP14-030-230-09

2.0 30 17.5 13.1 64.0 1/6 825 1.1 1.87

3.0 30 17.4 13.1 64.0 1/6 825 1.1 1.87

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

XP14-036-230-01

1.0, 2.0 &

3.0

Maximum

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

30 19.4 14.1 77.0 1/3 825 1.8 2.9

Rated

Load

Amps

2

(RLA)

Locked

Rotor
Amps
(LRA)

Motor HP

Nominal

RPM

Full Load

Amps
(FLA)

Locked

Rotor
Amps
(LRA)

XP14-036-230-02 1.0 30 19.4 14.1 77.0 1/3 825 1.8 2.9

XP14-036-230-08

1.0 30 19.4 14.1 77.0 1/3 825 1.8 2.9

2.0 30 18.7 14.08 77.0 1/6 825 1.1 1.87

XP14-036-230-09 1.0 30 18.7 14.08 77.0 1/6 825 1.1 1.87

XP14-036-230-10 1.0 & 2.0 30 18.7 14.08 77.0 1/6 825 1.1 1.87

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

XP14-042-230-01

1.0 40 23.9 17.69 107.0 1/3 825 1.8 2.9

2.0 & 3.0 40 24.2 17.94 112.0 1/3 825 1.8 2.9

Maximum

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

Rated

Load

Amps

2

(RLA)

Locked

Rotor
Amps
(LRA)

Motor HP

Nominal

RPM

Full Load

Amps
(FLA)

Locked

Rotor
Amps
(LRA)

XP14-042-230-02 1.0 40 24.2 17.94 112.0 1/3 825 1.8 2.9

1.0 40 24.2 17.94 112.0 1/3 825 1.8 2.9

XP14-042-230-08

XP14-042-230-09

2.0, 3.0 &

4.0

40 24.2 17.92 112.0 1/3 825 1.8 2.9

1.0 40 24.2 17.92 112.0 1/3 825 1.8 2.9

2.0 40 24.2 18.0 112.0 1/3 825 1.8 2.9

Page 5

XP14 SERIES

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

XP14-048-230-01

1.0, 2.0 &

3.0

Maximum

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

50 29.0 21.79 117.0 1/3 825 1.8 2.1

Rated

Load

Amps

2

(RLA)

Locked

Rotor
Amps
(LRA)

Motor HP

Nominal

RPM

Full Load

Amps
(FLA)

Locked

Rotor
Amps
(LRA)

XP14-048-230-02 1.0 50 29.0 21.79 117.0 1/3 825 1.8 2.1

XP14-048-230-08 1.0 50 29.0 21.76 117.0 1/3 825 1.8 2.1

XP14-048-230-09

1.0 50 29.0 21.79 117.0 1/3 825 1.8 2.1

2.0 & 3.0 50 29.0 21.76 117.0 1/3 825 1.8 2.1

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

Maximum

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

Rated

Load

Amps

2

(RLA)

Locked

Rotor
Amps
(LRA)

Motor HP

Nominal

RPM

Full Load

Amps
(FLA)

Locked

Rotor
Amps
(LRA)

XP14-060-230-01 1.0 & 2.0 60 34.8 26.41 134.0 1/3 825 1.8 2.1

XP14-060-230-03 1.0 60 34.8 26.41 134.0 1/3 825 1.8 2.1

1.0 60 34.8 26.41 134.0 1/3 825 1.8 2.1

XP14-060-230-08

2.0, 3.0 &

4.0

50 29.4 22.10 125.0 1/3 825 1.8 2.1

XP14-060-230-09 1.0 60 29.4 26.41 125.0 1/3 825 1.8 2.1

1

HACR type circuit breaker or fuse.

2

Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

Page 6

Unit Dimensions - Inches (mm)

A

LIQUID LINE
CONNECTION

ELECTRICAL INLETS

SUCTION LINE
CONNECTION

C

4-3/4”

(121)

B

TOP VIEW

SIDE VIEW

4-1/2”

(108)

Table 1. XP14-XXX-230-01 through 07

Model Number

XP14-018-230 31 (787)

XP14-024-230 31 (787)

XP14-030-230 35 (889)

XP14-036-230 31 (787)

XP14-042-230 39 (991)

XP14-048-230 39 (991)

XP14-060-230 45 (1143)

A B C

27 (686) 28 (711)

35-1/2 (902) 39-1/2 (1003)

Table 2. XP14-XXX-230-08 / -09

Model Number A B C

XP14-018-230 39 (991)

XP14-024-230 39 (991)

XP14-030-230 39 (991)

XP14-036-230 35 (889)

XP14-042-230 39 (991)

XP14-048-230 39 (991)

XP14-060-230 45 (1143)

30-1/2 (775) 35 (889)

35-1/2 (902) 39-1/2 (1003)

UNIT SUPPORT FEET

13-7/8

(352)

7-3/4
(197)

3-1/4

(83)

27-1/8

(689)

XP14-018 AND -036 BASE WITH

ELONGATED LEGS (MEDIUM)

UNIT SUPPORT FEET

20-5/8

K

(524)

4-1/2

J

(114)

3-5/8

(92)

Page 7

16-7/8

(429)

8-3/4
(222)

3-1/8

(79)

30-3/4

(781)

XP14-042 TO -060 BASE WITH

ELONGATED LEGS (LARGE)

26-7/8

(683)

3-3/4

(95)

4-5/8
(117)

XP14 SERIES

Typical Unit Parts Arrangement

CONTROL PANEL

CONTACTOR-1POLE

GROUND LUG

CONTROL (A108)

(K1-1)

DEFROST

CAPACITOR
(C12)

AMBIENT
SENSOR (RT13)

COMPRESSOR HARNESS

THERMOSTAT (S40) (-036,

-042, -048 AND 060 UNITS

CONNECTION

MUFFLER

CRANKCASE HEATER

ONLY)

REVERSING VALVE

REVERSING VALVE

SOLENOID

LOW PRESSURE

SWITCH (S87)

5-TON UNIT

EXAMPLED HERE

CHECK EXPANSION VALVE

SENSING BULB

COMPRESSOR
(B1)

COIL TEMPERATURE

SENSOR (RT21) - 6TH

HAIRPIN UP ON INSIDE ROW.

CHECK EXPANSION
VALV E

LIQUID LINE FILTER DRIER (BI-FLOW)

CRANKCASE HEATER (-036, -042, -048
AND -060 UNITS ONLY)

HIGH PRESSURE SWITCH
(AUTO-RESET) (S4)

TRUE SUCTION PORT

VAPOR LINE SERVICE
VALV E

FIELD CONNECTION
FOR VAPOR LINE

LIQUID LINE SERVICE

PLUMBING, SWITCHES AND SENSOR COMPONENTS

Figure 1. Typical Parts Arrangements (XP14-XXX-230-01 through 07)

VALV E

FIELD CONNECTION

FOR LIQUID LINE SET

Page 8

CONTROL PANEL

CAPACITOR (C12)

CONTACTOR-

1POLE (K1-1)

GROUND

LUG

TRUE SUCTION

PORT

REVERSING

VALV E

MUFFLER

5-TON UNIT

EXAMPLED HERE

DEFROST CONTROL
(CMC1)

ONLY ON UNITS

USING EXTERNAL

COMPRESSOR

THERMAL

PROTECTION

SWITCH (S173)

SWITCH

COVER

SWITCH

DEFROST
THERMOSTAT (S6)

CHECK EXPANSION
VALV E

REVERSING VALVE

SOLENOID

CRANKCASE HEATER

(-036, -042, -048 AND

060 UNITS ONLY)

LOW PRESSURE

SWITCH (S87)

LIQUID LINE FILTER
DRIER (BI-FLOW)

CHECK EXPANSION VALVE
SENSING BULB

CRANKCASE HEATER THERMOSTAT (S40)
(-036, -042, -048 AND 060 UNITS ONLY)

HIGH PRESSURE SWITCH
(AUTO-RESET) (S4)

VAPOR LINE SERVICE

LIQUID LINE

SERVICE VALVE

FIELD CONNECTION FOR VAPOR
LINE (ANGLE-TYPE - ALL SIZES
EXCEPT -060)

FIELD CONNECTION

FOR LIQUID LINE SET

PLUMBING, SWITCHES AND

VALV E

FIELD CONNECTION
FOR VAPOR LINE
(BALL-TYPE -060 ONLY)

SENSOR COMPONENTS

Figure 2. Typical Parts Arrangements (XP14-XXX-230-08)

Page 9

XP14 SERIES

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.

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.

Operating Gauge Set and Service Valves

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

TORQUE REQUIREMENTS

When servicing or repairing heating, ventilating, and air
conditioning components, ensure the fasteners are
appropriately tightened. Table 3 lists torque values for
fasteners.

IMPORTANT

Only use Allen wrenches of sufficient hardness (50Rc ­Rockwell Harness Scale minimum). Fully insert the
wrench into the valve stem recess.

Service valve stems are factory-torqued (from 9 ft-lbs for
small valves, to 25 ft-lbs for large valves) to prevent
refrigerant loss during shipping and handling. Using an
Allen wrench rated at less than 50Rc risks rounding or
breaking off the wrench, or stripping the valve stem
recess.

See the Lennox Service and Application Notes #C-08-1
for further details and information.

IMPORTANT

To prevent stripping of the various caps used, the
appropriately sized wrench should be used and fitted
snugly over the cap before tightening.

Table 3. Torque Requirements

Parts Recommended Torque

Service valve cap 8 ft.- lb. 11 NM

Sheet metal screws 16 in.- lb. 2 NM

Machine screws #10 28 in.- lb. 3 NM

Compressor bolts 90 in.- lb. 10 NM

Gauge port seal cap 8 ft.- lb. 11 NM

USING MANIFOLD GAUGE SET

When checking the system charge, only use a manifold
gauge set that features low loss anti-blow back fittings.

Manifold gauge set used with HFC-410A refrigerant
systems must be capable of handling the higher system
operating pressures. The gauges should be rated for use
with pressures of 0 - 800 psig on the high side and a low
side of 30” vacuum to 250 psig with dampened speed to
500 psi. Gauge hoses must be rated for use at up to 800
psig of pressure with a 4000 psig burst rating.

OPERATING SERVICE VALVES

The liquid and vapor line service valves are used for
removing refrigerant, flushing, leak testing, evacuating,
checking charge and charging.

Each valve is equipped with a service port which has a
factory-installed valve stem. Figure 3 provides information
on how to access and operating both angle and ball service
valves.

Page 10

SERVICE VALVES

ANGLE AND BALL

Operating Angle Type Service Valve:

1. Remove stem cap with an appropriately sized wrench.

2. Use a service wrench with a hex-head extension (3/16” for liquid line valve sizes and 5/16” for vapor line valve sizes) to back
the stem out counterclockwise as far as it will go.

SERVICE PORT CAP

SERVICE PORT CORE

(VALVE STEM SHOWN

TO INDOOR

UNIT

(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE

CLOSED) INSERT HEX
WRENCH HERE

SERVICE PORT

CORE

TO OUTDOOR UNIT

ANGLE-TYPE SERVICE VALVE

(BACK-SEATED OPENED)

When service valve is OPEN, the service port is
open to the line set, indoor and outdoor unit.

Operating Ball Type Service Valve:

1. Remove stem cap with an appropriately sized wrench.

2. Use an appropriately sized wrench to open. To open valve, rotate
stem counterclockwise 90°. To close rotate stem clockwise 90°.

TO INDOOR UNIT

TO OPEN ROTATE STEM
COUNTERCLOCKWISE 90°.

TO CLOSE ROTATE STEM
CLOCKWISE 90°.

SERVICE PORT

SERVICE PORT

SERVICE PORT

CORE

CAP

TO OUTDOOR

UNIT

BALL (SHOWN
CLOSED)

VALV E
STEM

STEM CAP

STEM CAP

ANGLE-TYPE SERVICE VALVE

(FRONT-SEATED CLOSED)

When service valve is CLOSED, the service port is
open to the line set and indoor unit.

To Access Service Port:

A service port cap protects the service port core from contamination and
serves as the primary leak seal.

1. Remove service port cap with an appropriately sized wrench.

2. Connect gauge set to service port.

3. When testing is completed, replace service port cap and tighten as
follows:

 With torque wrench: Finger tighten and

torque cap per table 3.

 Without torque wrench: Finger tighten and

use an appropriately sized wrench to turn
an additional 1/6 turn clockwise.

Reinstall Stem Cap:

Stem cap protects the valve stem from damage and serves as the
primary seal. Replace the stem cap and tighten as follows:

9

10

8

11

12

7

6

 With torque wrench: Finger tighten and

then torque cap per table 3.

 Without torque wrench: Finger tighten

and use an appropriately sized
wrench to turn an additional 1/12 turn
clockwise.

9

10

8

11

12

7

6

1/6 TURN

1

2

3

4

5

1/12 TURN

1

2

3

4

5

NOTE — A label with specific torque requirements may be affixed to the stem cap. If the label is present, use the specified torque.

Figure 3. Angle and Ball Service Valves

Page 11

XP14 SERIES

Recovering Refrigerant from System

DISCONNECT POWER

Disconnect all power to the existing outdoor unit at the disconnect

12

switch or main fuse box/breaker panel.

MAIN FUSE BOX/BREAKER PANEL

MAIN FUSE

BOX/BREAKER

PANEL

DISCONNECT

SWITCH

RECOVERING REFRIGERANT

Remove existing HCFC-22 refrigerant using one of the following procedures:

3

IMPORTANT — Some system configurations may contain higher than normal refrigerant charge due to either large internal coil volumes,

and/or long line sets.

CONNECT MANIFOLD GAUGE SET

Connect a gauge set, clean recovery cylinder and a recovery
machine to the service ports of the existing unit. Use the
instructions provided with the recovery machine to make the
connections.

MANIFOLD GAUGES

RECOVERY MACHINE

LOW

CLEAN RECOVERY
CYLINDER

OUTDOOR UNIT

HIGH

METHOD 1:

Us this method if the existing outdoor unit is not equipped with shut-off valves, or if the unit is not operational and you plan to use the existing
HCFC-22 to flush the system.

Remove all HCFC-22 refrigerant from the existing system. Check gauges after shutdown to confirm that the entire system is completely void of
refrigerant.

METHOD 2:

Use this method if the existing outdoor unit is equipped with manual shut-off valves, and you plan to use new HCFC-22 refrigerant to flush the
system.

The following devices could prevent full system charge recovery into the outdoor unit:

 Outdoor unit's high or low-pressure switches (if applicable) when tripped can cycle the compressor OFF.
 Compressor can stop pumping due to tripped internal pressure relief valve.
 Compressor has internal vacuum protection that is designed to unload the scrolls (compressor stops pumping) when the pressure ratio meets

a certain value or when the suction pressure is as high as 20 psig. (Compressor suction pressures should never be allowed to go into a vacuum.
Prolonged operation at low suction pressures will result in overheating of the scrolls and permanent damage to the scroll tips, drive bearings and

internal seals.)
Once the compressor can not pump down to a lower pressure due to one of the above system conditions, shut off the vapor valve. Turn OFF the
main power to unit and use a recovery machine to recover any refrigerant left in the indoor coil and line set.

Perform the following task:
A Start the existing HCFC-22 system in the cooling mode and close the liquid line valve.
B Use the compressor to pump as much of the existing HCFC-22 refrigerant into the outdoor unit until the outdoor system is full. Turn the outdoor unit

main power OFF and use a recovery machine to remove the remaining refrigerant from the system.

NOTE — It may be necessary to bypass the low pressure switches (if equipped) to ensure complete refrigerant evacuation.

C When the low side system pressures reach 0 psig, close the vapor line valve.
D Check gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system.

Figure 4. Refrigerant Recovery

Page 12

See NOTES

NOTES:

Service clearance of 30 in. must be maintained on one of the sides
adjacent to the control box.

Clearance to one of the other three sides must be 36 in.

See

NOTES

See NOTES

See

NOTES

Control

Box

Clearance to one of the remaining two sides may be 12 in. and the
final side may be 6 in.

A clearance of 24 in. must be maintained
between two units.

48 in. clearance required on top of unit.

NOTICE: Specific applications may require adjustment of the listed installation clearances to provide protection for
the unit from physical damage or to avoid conditions which limit operating efficiency. (Example: Clearances may
have to be increased to prevent snow or ice from falling on the top of the unit. Additional clearances may also be
required to prevent air recirculation when the unit is installed under a deck or in another tight space.)

Figure 5. Installation Clearances

PLACING UNIT ON SLAB

Unit Placement

When installing unit at grade level, the top of the slab
should be high enough above grade so that water from
higher ground will not collect around the unit. The slab

CAUTION

In order to avoid injury, take proper precaution when
lifting heavy objects.

should have a slope tolerance as described in figure 6,
detail B.

NOTE — If necessary for stability, anchor unit to slab as
described in figure 6, detail D.

See Unit Dimensions on page 3 for sizing mounting slab,
platforms or supports. Refer to figure 5 for mandatory
installation clearance requirements.

POSITIONING CONSIDERATIONS

Consider the following when positioning the unit:

 Some localities are adopting sound ordinances based

on the unit's sound level registered from the adjacent
property, not from the installation property. Install the
unit as far as possible from the property line.

 When possible, do not install the unit directly outside

a window. Glass has a very high level of sound
transmission. For proper placement of unit in relation
to a window see the provided illustration in figure 6,
detail A.

ELEVATING THE UNIT

Units are outfitted with elongated support feet as illustrated
in figure 6, detail C.

If additional elevation is necessary, raise the unit by
extending the height of the unit support feet. This may be
achieved by using a 2 inch (50.8mm) Schedule 40 female
threaded adapter.

The specified coupling will fit snuggly into the recessed
portion of the feet. Use additional 2 inch (50.8mm)
Schedule 40 male threaded adaptors which can be
threaded into the female threaded adaptors to make
additional adjustments to the level of the unit.

NOTE — Keep the height of extenders short enough to
ensure a sturdy installation. If it is necessary to extend
further, consider a different type of field-fabricated
framework that is sturdy enough for greater heights.

Page 13

XP14 SERIES

DETAIL A

Install unit away from windows.

— Outside Unit Placement

DETAIL B

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

— Slab Mounting at Ground Level

BUILDING

STRUCTURE

MOUNTING
SLAB

TWO 90° ELBOWS INSTALLED IN LINE SET WILL

REDUCE LINE SET VIBRATION.

DETAIL C

— Elevated Slab Mounting

using Feet Extenders

LEG DETAIL

2” (50.8MM) SCH 40

FEMALE THREADED

ADAPTER

BASE

GROUND LEVEL

STABILIZING UNIT ON UNEVEN SURFACES

DETAIL D

#10 1/2” LONG SELF-DRILLING

SHEET METAL SCREWS

STABILIZING BRACKET (18 GAUGE

METAL — 2” WIDTH; HEIGHT AS

#10 1-1/4” LONG HEX HD SCREW

Concrete slab — use two plastic anchors (hole
drill 1/4”)

Wood or plastic slab — no plastic anchor (hole
drill 1/8”)

DETAIL E

Stabilizing bracket (18 gauge metal — 2” (50.8mm) width; height as required); bend to form
right angle as exampled below.

— Slab Side Mounting

REQUIRED)

AND FLAT WASHER

— Deck Top Mounting

MINIMUM ONE

PER SIDE

COIL

BASE PAN

CORNER POST

2” (50.8MM) SCH 40

MALE THREADED

ADAPTER

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.

IMPORTANT — To help stabilize an outdoor unit, some installations may require strapping the unit to the pad using brackets and anchors
commonly available in the marketplace.

Figure 6. Placement, Slab Mounting and Stabilizing Unit

SAME FASTENERS AS
SLAB SIDE MOUNTING.

One bracket per side (minimum). For extra stability, two brackets per side, two inches
(51mm) from each corner.

FOR EXTRA

STABILITY

Page 14

STABILIZING UNIT ON UNEVEN SURFACES

IMPORTANT

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 factory height units when
mounted on unstable an uneven surface.

NOTICE

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

rubber roofing material may absorb oil and cause the
rubber to swell when it comes into contact with oil. The
rubber will then bubble and could cause leaks. Protect
the roof surface to avoid exposure to refrigerant and oil
during service and installation. Failure to follow this
notice could result in damage to roof surface.

With unit positioned at installation site, perform the
following:

1. Remove two side louvered panels to expose the unit
base.

2. Install the brackets as illustrated in figure 6, detail D or
E using conventional practices.

3. Replace the panels after installation is complete.

ROOF MOUNTING

Install the unit a minimum of 6 inches (152 mm) above the
roof surface to avoid ice build-up 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. Size barrier at
least the same height and width as outdoor unit. Mount
barrier 24 inches (610 mm) from the sides of the unit in the
direction of prevailing winds.

Removing and Installing Panels

IMPORTANT

Do not allow panels to hang on unit by top tab. Tab is for
alignment and not designed to support weight of panel.

IMPORTANT

To help stabilize an outdoor unit, some installations may
require strapping the unit to the pad using brackets and
anchors commonly available in the marketplace.

WARNING

To prevent personal injury, or damage to panels, unit or
structure, be sure to observe the following:

While installing or servicing this unit, carefully stow all
removed panels out of the way, so that the panels will not
cause injury to personnel, nor cause damage to objects
or structures nearby, nor will the panels be subjected to
damage (e.g., being bent or scratched).

While handling or stowing the panels, consider any
weather conditions, especially windy conditions, that
may cause panels to be blown around and battered.

Page 15

XP14 SERIES

LOUVERED PANEL REMOVAL

Remove the louvered panels as follows:

1. Remove two screws, allowing the panel to swing open slight
ly.

2. Hold the panel firmly throughout this procedure. Rotate bot
tom corner of panel away from hinged corner post until lower
three tabs clear the slots as illustrated in detail B.

3. Move panel down until lip of upper tab clears the top slot in
corner post as illustrated in detail A.

LOUVERED PANEL INSTALLATION

Position the panel almost parallel with the unit as illustrated in
detail D with the screw side as close to the unit as possible.
Then, in a continuous motion:

1. Slightly rotate and guide the lip of top tab inward as illus

trated in detail A and C; then upward into the top slot
of the hinge corner post.

2. Rotate panel to vertical to fully engage all tabs.

3. Holding the panel's hinged side firmly in place, close the
right-hand side of the panel, aligning the screw holes.

4. When panel is correctly positioned and aligned, insert
the screws and tighten.

Detail C

MAINTAIN MINIMUM PANEL ANGLE (AS CLOSE TO PARALLEL WITH THE UNIT
AS POSSIBLE) WHILE INSTALLING PANEL.

IMPORTANT! DO NOT ALLOW PANELS TO HANG ON UNIT BY TOP TAB. TAB IS FOR
ALIGNMENT AND NOT DESIGNED TO SUPPORT WEIGHT OF PANEL.

PANEL SHOWN SLIGHTLY ROTATED TO ALLOW TOP TAB TO EXIT (OR
ENTER) TOP SLOT FOR REMOVING (OR INSTALLING) PANEL.

SCREW

LIP

DETAIL A

DETAIL B

ANGLE MAY BE TOO
EXTREME

HOLES

ROTATE IN THIS DIRECTION;

THEN DOWN TO REMOVE

HOLD DOOR FIRMLY TO THE HINGED

PANEL

SIDE TO MAINTAIN

FULLY-ENGAGED TABS

PREFERRED ANGLE
FOR INSTALLATION

Figure 7. Removing and Installing Panels

Page 16

New or Replacement Line Set

REFRIGERANT LINE SET

This section provides information on installation or
replacement of existing line set. If new or replacement line
set is not being installed then proceed to Brazing
Connections on page 19.

IMPORTANT

NOTE — When installing refrigerant lines longer than 50
feet, see the Lennox Refrigerant Piping Design and
Fabrication Guidelines, CORP. 9351-L9, or contact
Lennox Technical Support Product Applications for
assistance.

To obtain the correct information from Lennox, be sure to
communicate the following information:

 Model (XP14) and size of unit (e.g. -036).

Lennox highly recommends changing line set when
converting the existing system from HCFC-22 to
HFC-410A. If that is not possible and the line set is the
proper size as reference in table 2, use the procedure
outlined under Flushing the System on page 13.

If refrigerant lines are routed through a wall, then seal and
isolate the opening so vibration is not transmitted to the
building. Pay close attention to line set isolation during
installation of any HVAC system. When properly isolated
from building structures (walls, ceilings. floors), the
refrigerant lines will not create unnecessary vibration and
subsequent sounds. See figure 8 for recommended
installation practices. Also, consider the following when
placing and installing a high-efficiency outdoor unit.

Liquid lines that meter the refrigerant, such as RFC1 liquid
lines, must not be used in this application. Existing line set
of proper size as listed in table 4 may be reused. If system
was previously charged with HCFC-22 refrigerant, then
existing line set must be flushed (see Flushing the System
on page 22).

Field refrigerant piping consists of liquid and vapor lines
from the outdoor unit to the indoor unit coil (braze
connections). Use Lennox L15 (sweat, non-flare) series
line set, or field-fabricated refrigerant line sizes as listed in
table 4.

Table 4. Refrigerant Line Set — Inches (mm)

Model

-018

-024

-030

-036

-042

-048

-060

Valve Field
Connections

Liquid
Line

3/8 in.
(10 mm)

3/8 in.
(10 mm)

3/8 in.
(10 mm)

Vapor
Line

3/4 in
(19 mm)

7/8 in
(22 mm)

7/8 in.
(22 mm)

Recommended Line Set

Liquid
Line

3/8 in.
(10
mm)

3/8 in.
(10
mm)

3/8 in.
(10
mm)

Vapor
Line

3/4 in
(19 mm)

7/8 in
(22 mm)

7/8 in.
(22 mm)

L15
Line Sets

L15-41
15 ft. - 50 ft.
(4.6 m - 15 m)

L15-65
15 ft. - 50 ft.
(4.6 m - 15 m)

Field
Fabricated

 Line set diameters for the unit being installed as listed

in table 4 and total length of installation.

 Number of elbows vertical rise or drop in the piping.

The compressor is charged with sufficient Polyol ester oil
for line set lengths up to 50 feet. Recommend adding oil to
system based on the amount of refrigerant charge in the
system. No need to add oil in system with 20 pounds of
refrigerant or less. For systems over 20 pounds - add one
ounce of every five pounds of refrigerant.

Recommended topping-off POE oils are Mobil EAL
ARCTIC 22 CC or ICI EMKARATE RL32CF.

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

Mineral oils are not compatible with HFC-410A. If oil

must be added, it must be a Polyol Ester oil.

Page 17

XP14 SERIES

Line Set Isolation — The following illustrations are examples of proper refrigerant line set isolation:

REFRIGERANT LINE SET — TRANSITION

FROM VERTICAL TO HORIZONTAL

ANCHORED HEAVY NYLON
WIRE TIE OR AUTOMOTIVE

MUFFLER‐TYPE HANGER

WALL

STUD

NON-CORROSIVE

METAL SLEEVE

AUTOMOTIVE

MUFFLER‐TYPE HANGER

STRAP LIQUID LINE TO
VAPOR LINE

LIQUID LINE

VAPOR LINE - WRAPPED
IN ARMAFLEX

REFRIGERANT LINE SET — INSTALLING

HORIZONTAL RUNS

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

WIRE TIE (AROUND
VAPOR LINE ONLY)

8 FEET (2.43 METERS)

STRAPPING

MATERIAL (AROUND

VAPOR LINE ONLY)

TAPE OR
WIRE TIE

FLOOR JOIST OR

ROOF RAFTER

8 FEET (2.43 METERS)

NON-CORROSIVE
METAL SLEEVE

STRAP THE VAPOR LINE TO THE JOIST
OR RAFTER AT 8 FEET (2.43 METERS)
INTERVALS THEN STRAP THE LIQUID
LINE TO THE VAPOR LINE.

TAPE OR
WIRE TIE

REFRIGERANT LINE SET — INSTALLING

VERTICAL RUNS (NEW CONSTRUCTION SHOWN)

NOTE — Insulate liquid line when it is routed through areas where the
surrounding ambient temperature could become higher than the
temperature of the liquid line or when pressure drop is equal to or greater
than 20 psig.

OUTSIDE WALL

WOOD BLOCK

BETWEEN STUDS

VAPOR LINE WRAPPED

WITH ARMAFLEX

OUTSIDE

WALL

PVC

PIPE

FIBERGLASS

INSULATION

VAPOR LINE

SLEEVE

CAULK

LIQUID
LINE

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

LIQUID LINE

WIRE TIE

INSIDE WALL

STRAP

NON-CORROSIVE
METAL SLEEVE

WIRE TIE

WOOD BLOCK

WIRE TIE

STRAP

FLOOR JOIST OR

ROOF RAFTER

Figure 8. Line Set Installation

Page 18

Brazing Connections

Use the procedures outline in figures 9 and 10 for brazing
line set connections to service valves.

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.

IMPORTANT

Connect gauge set low pressure side to vapor line
service valve and repeat procedure starting at
paragraph 4 for brazing the liquid line to service port
valve.

IMPORTANT

Allow braze joint to cool before removing the wet rag
from the service valve. Temperatures above 250ºF can
damage valve seals.

WARNING

When using a high pressure gas such as
dry 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).

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.

IMPORTANT

Use silver alloy brazing rods with 5% minimum silver
alloy for copper-to-copper brazing. Use 45% minimum
alloy for copper-to-brass and copper-to-steel brazing.

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 ex
plosion, that could result in property
damage, personal injury or death.

Page 19

XP14 SERIES

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

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

SERVICE

PORT
CORE

SERVICE
PORT CAP

SUCTION / VAPOR LINE

SERVICE VALVE

LINE SET SIZE IS SMALLER

THAN CONNECTION

REFRIGERANT LINE

DO NOT CRIMP SERVICE VALVE

CONNECTOR WHEN PIPE IS

SMALLER THAN CONNECTION

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.

SUCTION / VAPOR SERVICE PORT MUST BE

OPEN TO ALLOW EXIT POINT FOR NITROGEN

VAPOR LINE

INDOOR

UNIT

LIQUID LINE

ATTACH

GAUGES

C

LIQUID LINE SERVICE

SUCTION /

VAPOR LINE

SERVICE

VALV E

VALV E

HIGHLOW

B

OUTDOOR

UNIT

WHEN BRAZING LINE SET TO

A

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

USE REGULATOR TO FLOW

NITROGEN AT 1 TO 2 PSIG.

NITROGEN

Figure 9. Brazing Procedures

Page 20

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.

6

Water-saturated cloths must 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

1. FIRE, PERSONAL INJURY, OR PROPERTY
DAMAGE will 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 in the line set! The braze, when complete,
must be quenched with water to absorb any residual
heat.

2. Do not open service valves until refrigerant lines and
indoor coil have been leak-tested and evacuated.
Refer to procedures provided in this supplement.

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. Refer to the unit installation instructions for the next step
in preparing the unit.

SUCTION / VAPOR LINE

SERVICE VALVE

WATER-SATURATED
CLOTH

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

Figure 10. Brazing Procedures (continued)

Page 21

XP14 SERIES

Flushing Line Set and Indoor Coil

TYPICAL EXISTING FIXED ORIFICE

1A

DISTRIBUTOR

ASSEMBLY

A On fully cased coils, remove the coil access and plumbing panels.
B Remove any shipping clamps holding 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 pro
cess.

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

Teflon® washer as illustrated above.

E Use a field-provided fitting to temporary reconnect the liquid line to the

indoor unit's liquid line orifice housing.

COIL SHOWN)

DISTRIBUTOR TUBES

LIQUID LINE ORIFICE HOUSING

REMOVE AND DISCARD

WHITE TEFLON

(IF PRESENT)

TEFLON® RING

FIXED ORIFICE

®

SEAL

LIQUID LINE ASSEMBLY

(INCLUDES STRAINER)

REMOVAL PROCEDURE (UNCASED

OR

BRASS NUT

1B

TWO PIECE PATCH PLATE

(UNCASED COIL ONLY)

CONNECT GAUGES AND EQUIPMENT FOR
FLUSHING PROCEDURE

2

INVERTED HCFC-22
CYLINDER CONTAINS
CLEAN HCFC-22* TO BE
USED FOR FLUSHING.

A

1

VAPOR LINE

SERVICE VALVE

EXISTING

INDOOR

UNIT

LIQUID LINE SERVICE

VALV E

VAPOR

LIQUID

OUTDOOR

B

NEW

UNIT

OPENED

C

D

RECOVERY

CYLINDER

A Inverted HCFC-22 cylinder with clean 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 to the gauge set.

D Connect recovery tank to recovery machines per machine instructions.

RECOVERY MACHINE

GAUGE

MANIFOLD

LOW HIGH

CLOSED

TANK
RETURN

INLET

DISCHARGE

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

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 holding 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 temporary 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

3

same 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

B

set and indoor unit coil.

B Invert the cylinder of clean HCFC-22* 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 down to 0
the system.

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.

*IMPORTANT - Clean refrigerant is any refrigerant in a system that has not had compressor burn out. If the system
has experienced burn out, it is recommended that the existing line set and indoor coil be replaced.

®

LINE

LIQUID

LINE

Figure 11. Installing Indoor Expansion Valve

Page 22

Installing Indoor Metering Device

This outdoor unit is designed for use in systems that use
check expansion valve metering devices at the indoor coil.

See the Lennox XP14 Engineering Handbook for
approved expansion valve kit match-ups. The expansion
valve unit 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 expansion
valve in a manner that will provide access for field servicing
of the expansion valve. Refer to below illustration for
reference during installation of expansion valve unit.

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

®

LIQUID LINE

ASSEMBLY WITH

LINE

TEFLON

RING

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 to the right.

B 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 to the right.

®

SENSING

LINE

A Remove the field-provided fitting that temporary

reconnected the liquid line to the indoor unit's distributor

assembly.
B Install one of the provided Teflon® rings around the

stubbed end of the expansion valve and lightly lubricate

the connector threads and expose surface of the Teflon

ring with refrigerant oil.
C Attach the stubbed end of the 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 20 ft-lb.
D Place the remaining Teflon® washer around the other

end of the expansion valve. Lightly lubricate connector

threads and expose surface of the Teflon® ring with

refrigerant oil.
E Attach the liquid line assembly to the 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 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 expansion bulb before insulating the sensing bulb once
installed.

B Connect the equalizer line from the 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

Figure 12. Installing Indoor Expansion Valve

FLARE NUT

COPPER FLARE
SEAL BONNET

MALE BRASS EQUALIZER
LINE FITTING

VAPOR LINE

Page 23

VAPOR LINE

12

BULB

NOTE — NEVER MOUNT ON BOTTOM OF LINE.

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

BULB

XP14 SERIES

IMPORTANT

The Environmental Protection Agency (EPA) prohibits
the intentional venting of HFC refrigerants during
maintenance, service, repair and disposal of appliance.
Approved methods of recovery, recycling or reclaiming
must be followed.

IMPORTANT

If this unit is being matched with an approved line set
or indoor unit coil which 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 the system
performance and capacity.
Failure to properly flush the system per the
instructions below will void the warranty.

CONNECT GAUGE SET

A Connect an HFC-410A manifold gauge set high pressure

1

hose 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.

Leak Test Line Set and Indoor Coil

WARNING

When using a high pressure gas such as
dry 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).

IMPORTANT

Leak detector must be capable of sensing HFC
refrigerant.

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.

HIGHLOW

MANIFOLD GAUGE SET

OUTDOOR UNIT

B

A

TO VAPOR

SERVICE VALVE

NITROGEN

HFC-410A

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

2

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) refrigerant 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 dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set.

D Adjust dry 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.

Figure 13. Leak Test

Page 24

Evacuating Line Set and Indoor Coil

CONNECT GAUGE SET

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

1

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 micron gauge available

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

HFC-410A

VACUUM PUMP

OUTDOOR

UNIT

A

B

A34000 1/4 SAE TEE WITH
SWIVEL COUPLER

500

C

MICRON

GAUGE

MANIFOLD

GAUGE SET

TO VAPOR

SERVICE VALVE

TO LIQUID LINE
SERVICE VALVE

D

EVACUATE THE SYSTEM

A Open both manifold valves and start the vacuum pump.

2

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 within a given volume or system, above the absolute zero of
pressure. 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:

 Close manifold gauge valves
 Close valve on vacuum pump
 Turn off vacuum pump
 Disconnect manifold gauge center port hose from vacuum pump
 Attach manifold center port hose to a dry nitrogen cylinder with pressure regulator set to 150 psig (1034 kPa) and purge the hose.
 Open manifold gauge valves to break the vacuum in the line set and indoor unit.
 Close manifold gauge valves.

D Shut off the dry nitrogen cylinder and remove the manifold gauge hose from the cylinder. Open the manifold gauge valves to release the

dry 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 an

upright cylinder of HFC-410A 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:

 Close manifold gauge valves.
 Shut off HFC-410A cylinder.
 Reinstall service valve cores by removing manifold hose from service valve. Quickly install cores with core

tool while maintaining a positive system pressure.

 Replace stem caps and secure finger tight, then tighten an additional one-sixth (1/6) of a turn as illustrated.

RECOMMEND

MINIMUM 3/8” HOSE

10

9

11

8

7

1/6 TURN

12

1

5

6

HIGHLOW

2

3

4

Figure 14. Evacuating System

Page 25

XP14 SERIES

IMPORTANT

Use a thermocouple or thermistor electronic vacuum
gauge that is calibrated in microns. Use an instrument
capable of accurately measuring down to 50 microns.

WARNING

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

Evacuating the system of non-condensables is critical for
proper operation of the unit. Non-condensables are
defined as any gas that will not condense under

temperatures and pressures present during operation of
an air conditioning system. Non-condensables and water
suction combine with refrigerant to produce substances
that corrode copper piping and compressor parts.

Electrical

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)

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 to an earth ground.

MAIN FUSE

BOX/BREAKER

PANEL

DISCONNECT

SWITCH

UNIT LOW VOLTAGE CONNECTIONS

3

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.

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

D

B

C

TERMINAL STRIP

Page 26

ARun 24VAC control wires through cutout with grommet.
BRun 24VAC control wires through wire tie.
CMake 24VAC control wire connections defrost control terminal strip.
DTighten 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 TO MAINTAIN
SEPARATION OF FIELD INSTALLED LOW AND HIGH VOLTAGE CIRCUITS.

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

Servicing Units Void of Charge

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

1. Leak check system using procedure outlined on page

24.

2. Evacuate the system using procedure outlined on
page 25.

3. Use nitrogen to break the vacuum and install a new
filter drier in the system.

4. Evacuate the system again using procedure outlined
on page 25.

5. Weigh in refrigerant using procedure outlined in figure

17.

6. Monitor the system to determine the amount of
moisture remaining in the oil. 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.

Unit Start-Up

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

3. After evacuation is complete, open both the liquid and
vapor line service valves to release the refrigerant
charge contained in outdoor unit into the system.

4. Replace the stem caps and tighten to the value listed
in table 3.

5. Check voltage supply at the disconnect switch. The
voltage must be within the range listed on the unit's
nameplate. If not, do not start the equipment until you
have consulted with the power company and the
voltage condition has been corrected.

6. Set the thermostat for a cooling demand. Turn on
power to the indoor indoor unit and close the outdoor
unit disconnect switch to start the unit.

7. Recheck voltage while the unit is running. Power must
be within range shown on the nameplate.

8. Check system for sufficient refrigerant by using the
procedures listed under System Charge.

IMPORTANT

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 binding.

GAUGE SET

CONNECTIONS FOR TESTING AND CHARGING

TRUE SUCTION PORT

B

CONNECTION

REFRIGERANT TANK

CHARGE IN

LIQUID PHASE

DIGITAL SCALE

INSIDE OUTDOOR UNIT

TEMPERATURE

D

SENSOR

System Refrigerant

This section outlines procedures for:

1. Connecting gauge set for testing and charging;

2. Checking and adjusting indoor airflow;

3. Adding or removing refrigerant.

MANIFOLD GAUGE SET

LOW

HIGH

OUTDOOR UNIT

A

C

TO LIQUID

LINE SERVICE

VALV E

TEMPERATURE SENSOR

(LIQUID LINE)

AClose manifold gauge set valves and connect the center hose to a cylinder of HFC-410A. Set for liquid phase charging.

BConnect the manifold gauge set's low pressure side to the true suction port. See figure 1 for approximate location of the true suction port.

CConnect the manifold gauge set's high pressure side to the liquid line service port.

DPosition temperature sensor on liquid line near liquid line service port.

Figure 15. Gauge Set Setup and Connections

Page 27

XP14 SERIES

ADDING OR REMOVING REFRIGERANT

This system uses HFC-410A refrigerant which operates at much higher pressures than HCFC-22. The pre-installed liquid
line filter drier is approved for use with HFC-410A only. Do not replace it with components designed for use with HCFC-22.
This unit is NOT approved for use with coils which use capillary tubes or fixed orifices as a refrigerant metering device.

Check airflow using the Delta-T (DT) process using the illustration in figure 16.

AIRFLOW

INDOOR COIL

Temperature of air
entering indoor
coil ºF

A

Wet-bulb ºF

DT

80 24 24 24 23 23 22 22 22 20 19 18 17 16 15
78 23 23 23 22 22 21 21 20 19 18 17 16 15 14
76 22 22 22 21 21 20 19 19 18 17 16 15 14 13

Dry-bulb

74 21 21 21 20 19 19 18 17 16 16 15 14 13 12
72 20 20 19 18 17 17 16 15 15 14 13 12 11 10
70 19 19 18 18 17 17 16 15 15 14 13 12 11 10

57 58 59 60 61 62 63 64 65 66 67 68 69 70

DRY

BULB

C

53º

T

19º

Drop

air flow

air flow

B

B

64º

All temperatures are expressed in ºF

INDOOR COIL

WET BULB

Use the following procedure to adjust for optimal air flow across the indoor coil:

1. Determine the desired DT — Measure entering air temperature using dry bulb (A) and wet bulb (B). DT
is the intersecting value of A and B in the table (see triangle).

2. Find temperature drop across coil — Measure the coil's dry bulb entering and leaving air temperatures
(A and C). Temperature Drop Formula: (T

3. Determine if fan needs adjustment — If the difference between the measured T

DT (T

–DT) is within +3º, no adjustment is needed. See example below:

Drop

) = A minus C.

Drop

and the desired

Drop

Assume DT = 15 and A temp. = 72º, these C temperatures would necessitate stated actions:

A

72º

DRY BULB

Cº T

53º 19 – 15 = 4 Increase the airflow
58º 14 – 15 = -1 (within +3º range) no change
62º 10 – 15 = -5 Decrease the airflow

– DT = ºF ACTION

Drop

4. Adjust the fan speed — See indoor unit instructions to increase/decrease fan speed.

Figure 16. Checking Indoor Airflow over Evaporator Coil using Delta-T Chart

Changing air flow affects all temperatures; recheck
temperatures to confirm that the temperature drop
and DT are within +3º.

Page 28

WEIGH IN

CHARGING METHOD

CALCULATING SYSTEM CHARGE FOR OUTDOOR UNIT VOID OF CHARGE

If the system is void of refrigerant, first, locate and repair any leaks and then weigh in the refrigerant charge into the unit. To calculate the total refriger
ant charge:

Amount specified on

nameplate

Adjust amount. for variation in line set

length listed on line set length table below.

+

Additional charge specified per indoor

unit match-ups starting on pages 29

and 30.

+

Total Charge

=

Refrigerant Charge per Line Set Length

LIQUID LINE SET DIAMETER

3/8” (9.5 MM)

*If line length is greater than 15 ft. (4.6 m), add this amount. If line length is less than 15 ft. (4.6 m), subtract this
amount.

NOTE — Insulate liquid line when it is routed through areas where the surrounding ambient temperature could
become higher than the temperature of the liquid line or when pressure drop is equal to or greater than 20 psig.

NOTE — The above nameplate is for illustration purposes only. Go to actual nameplate on outdoor unit for charge
information.

OUNCES PER 5 FEET (G PER 1.5 M) ADJUST FROM 15 FEET (4.6 M)

3 OUNCE PER 5' (85 G PER 1.5 M)

LINE SET*

Figure 17. Using HFC-410A Weigh In Method

SUBCOOLING

1 Check the airflow as illustrated in figure 16 to be sure the indoor airflow is as required. (Make any air flow

adjustments before continuing with the following procedure.)

2 Measure outdoor ambient temperature; determine whether to use cooling mode or heating mode to check

charge.

3 Connect gauge set.

4 Check Liquid and Vapor line pressures. Compare pressures with Normal Operating Pressures tables. (The

reference tables are a general guide. Expect minor pressure variations. Significant differences may mean
improper charge or other system problem.)

5 Set thermostat for heat/cool demand, depending on mode being used:

Using cooling mode—When the outdoor ambient temperature is 60°F (15°C) and above. Target subcooling

values in table below are based on 70 to 80°F (21-27°C) indoor return air temperature; if necessary, operate
heating to reach that temperature range; then set thermostat to cooling mode setpoint to 68ºF (20ºC). When
pressures have stabilized, continue with step 6.

Using heating mode—When the outdoor ambient temperature is below 60°F (15°C). Target subcooling

values in table below are based on 65-75°F (18-24°C) indoor return air temperature; if necessary, operate cooling
to reach that temperature range; then set thermostat to heating mode setpoint to 77ºF (25ºC). When pressures
have stabilized, continue with step 6.

6 Read the liquid line temperature; record in the LIQº space.

7 Read the liquid line pressure; then find its corresponding temperature in the temperature/ pressure chart listed

in table 9 and record it in the SATº space.

8 Subtract LIQº temp. from SATº temp. to determine subcooling; record it in SCº space.

9 Compare SCº results with match up tables being sure to note any additional charge for line set and/or match-up.

10 If subcooling value is greater than shown in the match up tables for the applicable unit, remove refrigerant; if less

than shown, add refrigerant.

11 If refrigerant is added or removed, repeat steps 6 through 10 to verify charge.

12 Disconnect gauge set and re-install both the liquid and suction service valve caps.

SATº
LIQº –
SCº =

USE COOLING

MODE

60ºF (15º)

USE HEATING

MODE

Figure 18. Using Subcooling Method

Page 29

XP14 SERIES

Table 5. Unit Indoor Matchups for Subcooling (XP14-XXX-230-01 through 07)

INDOOR MATCHUPS

Target

Subcooling

HeatingCooling

(+5ºF)   (+1ºF)

*Add

charge

INDOOR MATCHUPS

XP14−018 lb oz XP14−030 (Continued) lb oz XP14−042 (Continued) lb oz

CBX27UH-018/024 13 7 0 8 CH33-42B 6 6 1 12 CR33-50/60C,-60D 26 6 0 4
CBX32MV-018/024 15 7 0 0 CR33-30/36A/B/C 30 8 0 8 CX34-62C, -62D 12 6 0 9
CBX40UHV-024 15 7 0 0 CX34-31A/B 11 6 1 6 CX34-49C 12 6 0 7

XP14−024 lb oz

CBX26UH-024 25 7 0 0

CX34-38A/B S/N# 6007

and after

CX34-38A/B Before S/N#

6007

CBX27UH-018/024 15 8 1 2 CX34-43B/C 15 11 2 14 CBX26UH-048 8 7 1 9
CBX32M-018/024 16 8 0 14 XP14−036 lb oz CBX27UH-048 11 8 1 2
CBX32M-030 15 8 1 3 C33-44C 13 6 0 0 CBX32M-048, -060 11 8 1 2
CBX32MV-018/024 16 8 0 14 CBX26UH-036 26 5 0 0 CBX32MV-048 25 8 0 0
CBX32MV-024/030 15 8 1 2 CBX26UH-037 25 4 1 9 CBX32MV-060 11 8 1 2
CBX40UHV-024 16 8 0 14 CBX27UH-036 13 6 0 3 CBX40UHV-048 25 8 0 0
CBX40UHV-030 15 8 1 2 CBX32M-036 13 6 0 2 CBX40UHV-060 11 8 1 2
CH23-41 16 8 0 2 CBX32M-042 13 6 0 3 CBX32MV-068 10 7 1 12
CH33-25A 16 6 0 7 CBX32MV-036 13 6 0 3 CH23-68 20 9 2 9
CH33-42B 14 11 1 10 CBX32MV-048 11 8 2 5 CH33-50/60C 11 8 1 1
CH33-36A 16 8 1 0 CBX40UHV-036 13 6 0 3 CH33-62D 10 7 1 14
CH33-36C 16 8 0 4 CBX40UHV-042, -048 11 8 2 5 CH33-60D 11 8 0 0
CR33-30/36A/B/C 25 7 0 2 CH33-50/60C 11 8 2 5 CR33-50/60C 35 5 0 0
CX34-25A/B 16 8 0 14 CH33-44B 13 6 1 7 CR33-60D 37 6 0 0
CX34-31A/B 15 8 1 3 CH33-48B 13 6 1 8 CX34-62C, -62D 10 7 1 7
CX34-36A/B/C 16 8 1 8 CR33-50/60C 25 4 1 15 CX34-49D 11 8 0 14
CX34-38A/B S/N# 6007

and after

CX34-38A/B before S/N#

6007

11 11 2 2 CR33-48B/C 25 5 0 9 CX34-60D 11 8 0 0

14 11 2 2 CX34-49C 13 6 2 4 XP14−060 lb oz

XP14−030 lb oz CX34-43B/C, -50/60C 13 6 1 8 CBX26UH-048 12 7 1 0

CH23-41 11 6 0 8

CH23-51 6 6 1 12

CX34-38A/B S/N# 6007

and after

CX34-38A/B before S/N#

6007

CBX26UH-024 30 8 0 6 XP14−042 lb oz CBX32M-048, -060 12 5 0 0
CBX26UH-030 29 8 2 3 CH23-68 20 9 0 13 CBX32MV-048, -060 12 5 0 0
CBX27UH-030 11 6 2 4 CBX26UH-042 27 6 0 0 CBX40UHV-048, -060 12 5 0 0
CBX32M-030 11 6 1 6 CBX27UH-042 12 6 0 8 CBX32MV-068 12 7 1 0
CBX32M-036 11 6 2 4 CBX32M-048 12 6 0 7 CH23-68 12 5 0 0
CBX32MV-024/030 11 6 1 6 CBX32MV-048 12 6 0 8 CH33-50/60C 12 5 0 0
CBX32MV-036 15 7 3 0 CBX40UHV-042, -048 12 6 0 8 CH33-62D 12 5 0 0
CBX40UHV-024, -030 11 6 1 6 CH33-43 12 6 0 7 CX34-62C, -62D 12 7 1 0
CBX40UHV-036 15 7 3 0 CH33-62D 12 6 0 10

C33-44C 11 6 2 3 CH33-50/60C 12 6 0 7

CH33-36C 11 3 0 0 CH33-60D 12 6 0 4

Target

Subcooling

HeatingCooling

(+5ºF)   (+1ºF)

*Add

charge

INDOOR MATCHUPS

Target

Subcooling

HeatingCooling

(+5ºF)   (+1ºF)

*Add

charge

6 6 2 3 CX34-60D 12 6 0 4

11 6 2 3 XP14−048 lb oz

6 6 0 0 CBX26UH-060 14 4 0 0

13 6 0 0 CBX27UH-060 12 5 0 0

*Add charge = Extra matchup amount required in addi
tion to charge indicated on Heat Pump nameplate (re
member to also add any charge required for line set
differences from 15 feet). SN indicates serial number.

Page 30

Table 6. Normal Operating Pressures - Liquid +10 and Vapor +5 PSIG* (XP14-XXX-230-01 through 07)

IMPORTANT

Use table 8 as a general guide when performing maintenance checks. This is not a procedure for charging the unit (Refer
to Charging / Checking Charge section). Minor variations in these pressures may be expected due to differences in instal
lations. Significant differences could mean that the system is not properly charged or that a problem exists with some
component in the system.

XP14-018 XP14-024 XP14-030 XP14-036 XP14-042 XP14-048 XP14-060

5F (5C)**

60 (15) 346 / 139 352 / 138 338 / 137 350 / 134 373 / 139 355 / 130 351 / 117

50 (10) 323 / 117 331 / 114 334 / 112 331 / 117 363 / 117 336 / 113 333 / 105

40 (4) 306 / 98 304 / 99 312 / 93 313 / 97 348 / 97 315 / 88 316 / 88

30 (-1) 278 / 84 299 / 80 302 / 74 298 / 83 336 / 74 296 / 72 308 / 70

20 (-7) 273 / 66 283 / 66 280 / 53 284 / 66 322 / 64 286 / 64 300 / 61

65 (18) 226 / 140 233 / 137 238 / 138 220 / 138 223 / 125 231 / 136 243 / 136

70 (21) 244 / 141 252 / 138 263 / 139 236 / 140 241 / 130 248 / 139 263 / 137

75 (24) 263 / 142 271 / 140 279 / 139 256 / 141 261 / 134 271 / 140 282 / 138

80 (27) 283 / 143 292 / 141 299 / 140 276 / 142 282 / 138 291 / 142 306 / 139

85 (29) 302 / 144 314 / 142 324 / 141 298 / 143 302 / 139 312 / 143 327 / 140

90 (32) 328 / 145 338 / 143 340 / 142 321 / 144 326 / 140 335 / 144 351 / 141

95 (35) 351 / 146 361 / 145 375 / 145 344 / 144 349 / 141 359 / 145 376 / 142

100 (38) 376 / 147 387 / 146 397 / 145 369 / 146 374 / 142 384 / 146 401 / 143

105 (41) 402 / 148 412 / 147 424 / 147 394 / 147 399 / 143 411 / 148 426 / 145

110 (38) 430 / 149 441 / 148 454 / 150 421 / 148 428 / 145 439 / 149 452 / 146

115 (45) 465 / 150 471 / 151 485 / 150 449 / 149 455 / 146 468 / 150 484 / 148

*IMPORTANT—These are most popular match-up pressures. Indoor match up, indoor air quality, and indoor load cause pressures to vary.
**Temperature of the air entering the outside coil.

Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid/ Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor

Heating

Cooling

Page 31

XP14 SERIES

Table 7. Indoor Unit Matches, Targeted Subcooling, and Add Charge Values (XP14-XXX-230-08 or higher)

HP

Indoor Coil or Air

SIZE

Handler

CBX27UH-018 13 14 1 9

CBX27UH-024 13 14 1 9 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7

CBX32MV-018/024 12 14 0 0 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4

CH33-25A 14 14 0 7 CX34-31 17 15 2 10 CR33-60D 29 5 0 4

-018
CH33-25B 14 13 0 5 CX34-36 25 6 0 10 CX34-49 11 6 1 4

CR33-30/36 12 5 0 7 CX34-38 10 19 2 14 CX34-50, -60 25 8 1 15

CX34-25 15 15 1 1 CX34-42 25 6 0 10 CX34-60 8 8 1 4

CX34-31 14 24 1 12 CX34-43 13 17 2 14 CX34-62C 8 11 3 10

CBX25UH-024 6 6 0 9 CX34-44, -48 9 21 2 12 CX34-62D 11 7 1 15

CBX25UH-030 17 3 0 15

CBX26UH-024 17 3 0 15 CBX26UH-036 31 3 0 4 CBX26UH-048 20 10 3 11

CBX27UH-024 12 12 1 2 CBX27UH-036 18 3 0 5 CBX27UH-048 16 6 0 0

CBX32M-018, -024 14 11 0 4 CBX27UH-042 11 4 0 1 CBX27UH-060 12 6 1 4

CBX32M-030 12 12 1 2 CBX27UH-048 11 4 0 1 CBX32M-048 16 6 0 0

CBX32MV-018/024 14 11 0 4 CBX32M-036 18 3 0 5 CBX32M-060 20 8 1 0

CBX32MV-024/030 12 12 1 2 CBX32M-042 18 3 0 5 CBX32MV-048 16 6 0 0

CBX32MV-036 11 11 2 1 CBX32MV-036 18 3 0 5 CBX32MV-060 20 8 1 0

CBX40UHV-024 11 11 2 1 CBX32MV-048 11 4 0 1 CBX32MV-068 10 8 4 5

CBX40UHV-030 11 11 2 1 CBX40UHV-042 11 4 0 1 CBX40UHV-048 16 6 0 0

-024
CH23-41 10 3 0 0 CBX40UHV-048 11 4 0 1 CBX40UHV-060 20 8 1 0

CH33-25A 20 10 1 1 CBX40UHV-036 18 3 0 5 CH23-68 24 6 2 8

CH33-25B 19 8 1 2 CH33-43B 14 8 2 1 CH33-50, -60C 17 6 1 5

CH33-31A 15 11 1 15 CH33-43C 26 9 2 10 CH33-60D 18 6 0 13

CH33-36C 10 12 0 0 CH33-44/48B 24 8 2 3 CH33-62D 13 7 3 6

CH33-36A 20 10 1 1 CH33-48C 26 9 2 10 CR33-50/60 19 6 1 1

CR33-30, -036 17 4 0 14 CH33-49C 15 8 2 12 CR33-60 19 6 1 1

CX34-25 15 9 0 15 CH33-50/60C 15 8 2 12 CX34-49C 10 6 1 9

CX34-31 15 16 0 9 CR33-48 38 5 0 0 CX34-60 28 7 3 14

CX34-36 26 6 0 9 CR33-50, -60 15 5 1 4 CX34-62C 10 6 3 12

CX34-38 10 18 1 14 CX34-38 15 4 0 9 CX34-62D 14 7 3 12

CBX25UH-030 9 3 0 8 CX34-43 23 8 2 8

CBX25UH-036 19 11 1 5 CX34-44/48 40 4 0 15 CBX26UH-060 31 6 3 0

CBX26UH-030 19 11 1 5 CX34-49 11 7 3 9 CBX27UH-060 13 7 0 8

CBX27UH-030 10 16 1 14 CX34-50/60 23 8 2 8 CBX32M-060 17 5 1 4

CBX27UH-036 10 16 1 14

CBX32M-030 15 4 2 7 CBX26UH-042 42 5 0 8 CBX32MV-060 17 5 1 4

CBX32M-036 10 16 1 14 CBX27UH-042, -048 13 5 2 2 CBX32MV-068 11 8 2 12

CBX32MV-024, -030 15 4 2 7 CBX32M-048 13 5 2 2 CBX40UHV-048 20 6 0 0

CBX32MV-036 10 16 1 14 CBX32MV-048 13 5 2 2 CBX40UHV-060 17 5 1 4

-030

CBX40UHV-030 10 16 1 14 CBX40UHV-042 13 5 2 2 CH23-68 27 7 0 13

CBX40UHV-036 10 16 1 14 CBX40UHV-048 13 5 2 2 CH33-50, -60C 11 4 0 0

CH23-41 11 4 0 8 CH23-68 20 9 1 5 CH33-62D 19 6 2 4

CH23-51 11 6 0 14 CH33-43B 7 9 3 2 CR33-50/60 19 6 2 4

CH33-31A 16 18 2 8 CH33-43C 22 5 1 0 CR33-60 23 6 1 3

CH33-31B 16 18 2 6 CH33-44/48B 18 4 0 0 CX34-62C 10 7 2 14

CH33-36A 10 6 0 6 CH33-48C 22 5 1 0 CX34-62D 19 7 3 2

CH33-36B 6 3 0 0 CH33-49C 16 6 1 6

CH33-36C 10 11 1 5 CH33-50, -60C 10 9 3 4

Subcool

Heat Cool Heat Cool Heat Cool

Additional
Charge

HP

Indoor Coil or Air

SIZE

Handler

CH33-42B 16 18 2 6

-030

CBX25UH-036 31 3 0 4

-036

CBX25UH-042 42 5 0 8 CBX32MV-048 20 6 0 0

-042

Subcool

Additional
Charge

HP

Indoor Coil or Air

SIZE

Handler

CH33-60D 12 8 0 9

-042

CBX25UH-048 15 6 2 5

-048

CBX25UH-060 15 6 2 0

-060

Subcool

*Amount of charge required in additional to charge shown on unit nameplate.

Additional
Charge

Page 32

Table 8. Normal Operating Pressures - Liquid +10 and Vapor +5 PSIG (XP14-XXX-230-08 or higher)

IMPORTANT

Use table 8 as a general guide when performing maintenance checks. This is not a procedure for charging the unit (Refer
to Charging / Checking Charge section). Minor variations in these pressures may be expected due to differences in instal
lations. Significant differences could mean that the system is not properly charged or that a problem exists with some
component in the system.

Vapor Pressure

Model

Number

ºF (ºC)* 20 30 40 50 60 65 70 75 80 85 90 95 100 105 110 11 5

-018 67 83 100 118 137 145 145 146 147 148 149 151 151 153 154 155

-024 58 72 88 105 123 139 140 142 143 144 145 145 146 147 147 148

-030 55 69 84 102 122 135 136 138 140 141 143 144 145 147 148 149

-036 62 76 91 106 124 135 137 139 141 143 145 146 148 150 151 153

-042 58 73 89 108 130 127 129 131 132 134 136 137 139 140 141 142

-048 60 75 90 105 121 136 137 138 139 140 141 142 143 144 146 147

-060 56 70 84 99 11 4 132 133 134 135 137 138 139 141 142 143 144

ºF (ºC)* 20 30 40 50 60 65 70 75 80 85 90 95 100 105 110 11 5

-018 272 287 305 321 339 242 259 279 302 326 351 376 406 433 462 498

-024 281 295 309 324 340 243 262 281 302 325 348 373 399 426 454 483

-030 274 286 299 313 327 250 268 288 308 330 352 376 400 426 452 480

-036 287 304 322 342 365 230 248 268 288 311 334 359 385 412 441 471

-042 293 335 368 394 411 215 234 254 275 298 321 346 371 398 426 455

-048 282 299 316 334 353 219 237 256 277 298 321 344 369 395 422 450

-060 266 285 309 337 369 222 241 262 283 306 330 354 380 406 434 463

*Temperature of the air entering the outside coil.

Heating Cooling

Liquid Pressure

Table 9. HFC-410A Temperature (°F) - Pressure (Psig)

°F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig

32 100.8 48 137.1 63 178.5 79 231.6 94 290.8 110 365.0

33 102.9 49 139.6 64 181.6 80 235.3 95 295.1 111 370.0 126 451.8 142 552.3
34 105.0 50 142.2 65 184.3 81 239.0 96 299.4 112 375.1 127 457.6 143 559.1
35 107.1 51 144.8 66 187.7 82 242.7 97 303.8 113 380.2 128 463.5 144 565.9

36 109.2 52 147.4 67 190.9 83 246.5 98 308.2 114 385.4 129 469.5 145 572.8
37 111.4 53 150.1 68 194.1 84 250.3 99 312.7 11 5 390.7 130 475.6 146 579.8
38 113.6 54 152.8 69 197.3 85 254.1 100 317.2 11 6 396.0 131 481.6 147 586.8

39 115.8 55 155.5 70 200.6 86 258.0 101 321.8 11 7 401.3 132 487.8 148 593.8
40 118.0 56 158.2 71 203.9 87 262.0 102 326.4 11 8 406.7 133 494.0 149 601.0
41 120.3 57 161.0 72 207.2 88 266.0 103 331.0 11 9 412.2 134 500.2 150 608.1

42 122.6 58 163.9 73 210.6 89 270.0 104 335.7 120 417.7 135 506.5 151 615.4
43 125.0 59 166.7 74 214.0 90 274.1 105 340.5 121 423.2 136 512.9 152 622.7
44 127.3 60 169.6 75 217.4 91 278.2 106 345.3 122 428.8 137 519.3 153 630.1

45 129.7 61 172.6 76 220.9 92 282.3 107 350.1 123 434.5 138 525.8 154 637.5

46 132.2 62 175.4 77 224.4 93 286.5 108 355.0 124 440.2 139 532.4 155 645.0

47 134.6 78 228.0 109 360.0 140 539.0

125 445.9

141 545.6

Page 33

XP14 SERIES

System Operation- (XP14-XXX-230-01
through 07)

The demand defrost controller measures differential
temperatures to detect when the system is performing
poorly because of ice build-up on the outdoor coil. The
controller self-calibrates when the defrost system starts
and after each system defrost cycle. The defrost control
board components are shown in figure 19.

The control monitors ambient temperature, outdoor coil
temperature, and total run time to determine when a
defrost cycle is required. The coil temperature probe is
designed with a spring clip to allow mounting to the outside
coil tubing. The location of the coil sensor is important for
proper defrost operation.

NOTE - The demand defrost board accurately measures
the performance of the system as frost accumulates on the
outdoor coil. This typically will translate into longer running
time between defrost cycles as more frost accumulates on
the outdoor coil before the board initiates defrost cycles.

FILTER DRIER

The unit is equipped with a large-capacity bi-flow filter drier
which keeps the system clean and dry. If replacement is
necessary, order another of the same design and capacity.
The replacement filter drier must be suitable for use with
HFC-410A refrigerant.

DEFROST CONTROL BOARD

Figure 19 provides a basic illustration of the layout of the
defrost control board. Table 10 provides information
concerning pin-out and jumper configurations.

Note - Component Locations Vary by Board Manufacturer.

TEST PINS

DEFROST

TERMINATION

PIN SETTINGS

SENSOR PLUG IN

(COIL, AMBIENT,

& DISCHARGE

SENSORS)

DELAY

PINS

REVERSING

VALV E

PRESSURE

SWITCH
CIRCUIT

CONNECTIONS

Figure 19. Defrost Control Board

Test: Defrost Temperature Termination Shunt
(Jumper) Pins—The defrost board selections are: 50, 70,

90, and 100°F (10, 21, 32 and 38°C). The shunt
termination pin is factory set at 50°F (10°C). If the
temperature shunt is not installed, the default termination
temperature is 90°F (32°C).

LOW
AMBIENT
THERMOSTAT
PINS

DIAGNOSTIC
LEDS

24V TERMINAL
STRIP
CONNECTIONS

Note: The Y1 input must be active (ON) and the “O” room
thermostat terminal into board must be inactive.

DIAGNOSTIC LEDS

The state (Off, On, Flashing) of two LEDs on the defrost
board (DS1 [Red] and DS2 [Green]) indicate diagnostics
conditions that are described in table 13.

DELAY MODE

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. When a jumper is installed
on the DELAY pins, the compressor will be cycled off for 30
seconds going in and out of the defrost mode. Units are
shipped with jumper installed on DELAY pins.

DEFROST BOARD PRESSURE SWITCH
CONNECTIONS

The unit's automatic reset pressure switches (LO PS - S87
and HI PS - S4) are factory-wired into the defrost board on
the LO-PS and HI-PS terminals, respectively.

Low Pressure Switch (LO-PS)

When the low pressure switch trips, the defrost board will
cycle off the compressor, and the strike counter in the
board will count one strike. Low Pressure (auto reset) ­trip at 25 psig; reset at 40 psig. The low pressure switch is
ignored under the following conditions:

 during the defrost cycle and 90 seconds after the

termination of defrost

 when the average ambient sensor temperature is below

15° F (-9°C)

 for 90 seconds following the start up of the compressor
 during test mode

High Pressure Switch (HI-PS)

When the high pressure switch trips, the defrost board will
cycle off the compressor, and the strike counter in the
board will count one strike. High Pressure (auto reset) ­trip at 590 psig; reset at 418 psig.

Low Ambient Thermostat Pins - P3 provides selection of
the Y2 compressor lock-in temperature. The XP14 series
heat pumps do not use a Y2 compressor and therefore
these pins are not active.

FIVE-STRIKE LOCKOUT FEATURE

The internal control logic of the board counts the pressure
switch trips only while the Y1 (Input) line is active. If a
pressure switch opens and closes four times during a Y1
(Input), the control logic will reset the pressure switch trip
counter to zero at the end of the Y1 (Input). If the pressure
switch opens for a fifth time during the current Y1 (Input),
the control will enter a lockout condition.

The five-strike pressure switch lockout condition can be
reset by cycling OFF the 24-volt power to the control board
or by shorting the TEST pins between 1 and 2 seconds. All
timer functions (run times) will also be reset.

If a pressure switch opens while the Y1 Out line is
engaged, a 5-minute short cycle will occur after the switch
closes.

Page 34

Table 10. Defrost Control Board Description (XP14-XXX-230-01 through 07)

ID Description

O Out 24 VAC output connection for reversing valve

LO-PS Connection for low-pressure switch

Y2 24 VAC output for second stage compressor solenoid

Y1 24 VAC common output, switched for enabling compressor contactor

HI-PS Connection for high-pressure switch

P1 Seven position square pin header. P1 provides selection of the defrost terminate temperature based on the position of selection shunt, as

P2 The following connections are provided in the seven position P2 screw terminal block:

P3 Five position square pin header. P3 provides selection of the Y2 compressor lock-in temperature. Note: This is applicable for two stage

P4 Six position square pin header. P4 provides connections for the temperature sensors:

P5 Two position square pin header. P5 provides selection of the 30-second compressor delay option.

P6 Eight position header. P6 provides connections for the factory test connections.

well as selection pins for enabling the field test mode.

W1 24 VAC thermostat output for auxiliary heat operation

C 24 VAC system common

L Service light thermostat connection

R 24 VAC system power input

Y2 24 VAC thermostat input for second stage compressor operation

O 24 VAC thermostat input for reversing valve operation

Y1 24 VAC thermostat input for first stage compressor operation

compressor operations only.

COIL (P4-5) Ground connection for outdoor coil temperature sensor.

(P4-6) Connection for outdoor coil temperature sensor.

AMB (P4-3) Ground connection for outdoor ambient temperature sensor.

(P4-4) Connection for outdoor ambient temperature sensor.

DIS (P4-1) Ground connection for discharge temperature sensor.

(P4-2) Connection for discharge temperature sensor. Note: This is applicable for two stage compressor operations only.

Actuation—When the reversing valve is de-energized,
the Y1 circuit is energized, and the coil temperature is
below 35°F (2°C), the board logs the compressor run time.
If the board is not calibrated, a defrost cycle will be initiated
after 30 minutes of heating mode compressor run time.
The control will attempt to self-calibrate after this (and all
other) defrost cycle(s).

Calibration success depends on stable system
temperatures during the 20-minute calibration period. If
the board fails to calibrate, another defrost cycle will be
initiated after 45 minutes of heating mode compressor run
time. Once the defrost board is calibrated, it initiates a
demand defrost cycle when the difference between the
clear coil and frosted coil temperatures exceeds the
maximum difference allowed by the control OR after 6
hours of heating mode compressor run time has been
logged since the last defrost cycle.

NOTE - If ambient or coil sensor fault is detected, the
board will not execute the TEST mode.

Termination—The defrost cycle ends when the coil
temperature exceeds the termination temperature or after
14 minutes of defrost operation. If the defrost is terminated
by the 14-minute timer, another defrost cycle will be
initiated after 30 minutes of run time.

Each test pin shorting will result in one test event. For
each TEST the shunt (jumper) must be removed for at
least one second and reapplied. Refer to flow chart as
illustrated in figure 20 for TEST operation.

Test Mode—When Y1 is energized and 24V power is
being applied to the board, a test cycle can be initiated by
placing the termination temperature jumper across the
TEST pins for two to five seconds. If the jumper remains
across the TEST pins longer than five seconds, the control
will ignore the TEST pins and revert to normal operation.
The jumper will initiate one cycle per test.

Table 11. Sensor Temperature / Resistance Range

Temperatur
e Range °F

Sensor

Outdoor
(Ambient)

Coil -35 to 120

Note: Sensor resistance decreases as sensed temperature increases.

(°C)

-35 to 120
(-37) to (48)

(-37) to (48)

Resistance
Values
Range
(ohms)

280,000 to
3750

280,000 to
3750

Pins/Wire Color

3 and 4 (Black)

5 and 6 (Brown)

Page 35

XP14 SERIES

Enter the TEST mode by placing a shunt (jumper) across
the TEST pins on the board after power-up. The TEST
pins are ignored and the test function is locked out if the
shunt is applied on the TEST pins before power-up. Board
timings are reduced, the low-pressure switch is ignored
and the board will clear any active lockout condition.

NOTE - The 30-second off cycle is NOT functional when
jumpering the TEST pins.

Ambient Sensor—The ambient sensor (shown in figure

1) considers outdoor temperatures below -35°F (-37°C) or
above 120°F (48°C) as a fault. If the ambient sensor is
detected as being open, shorted or out of the temperature
range of the sensor, the board will not perform demand
defrost operation. The board will revert to
time/temperature defrost operation and will display the
appropriate fault code. Heating and cooling operation will
be allowed in this fault condition.

Coil Sensor—The coil temperature sensor (shown in
figure 1) considers outdoor temperatures below -35°F
(-37°C) or above 120°F (48°C) as a fault. If the coil
temperature sensor is detected as being open, shorted or
out of the temperature range of the sensor, the board will
not perform demand or time/temperature defrost
operation and will display the appropriate fault code.
Heating and cooling operation will be allowed in this fault
condition.

Defrost System - (XP14-XXX-230-01
through 07)

The defrost control board has three basic operational
modes: normal, calibration, and defrost.

Normal Mode—The demand defrost board monitors the
O line, to determine the system operating mode
(heat/cool), outdoor ambient temperature, coil
temperature (outdoor coil) and compressor run time to
determine when a defrost cycle is required.

Calibration Mode—The board is considered uncalibrated
when power is applied to the board, after cool mode
operation, or if the coil temperature exceeds the
termination temperature when it is in heat mode.

Calibration of the board occurs after a defrost cycle to
ensure that there is no ice on the coil. During calibration,
the temperature of both the coil and the ambient sensor
are measured to establish the temperature differential
which is required to allow a defrost cycle.

Defrost Mode—The following paragraphs provide a
detailed description of the defrost system operation.

Defrost Cycles—The demand defrost control board
initiates a defrost cycle based on either frost detection or
time.

 Frost Detection—If the compressor runs longer than

30 minutes and the actual difference between the clear
coil and frosted coil temperatures exceeds the
maximum difference allowed by the control, a defrost
cycle will be initiated.

IMPORTANT - The demand defrost control board will
allow a greater accumulation of frost and will initiate
fewer defrost cycles than a time/temperature defrost
system.

 Time—If six hours of heating mode compressor run

time has elapsed since the last defrost cycle while the
coil temperature remains below 35°F (2°C), the
demand defrost control will initiate a defrost cycle.

Page 36

Table 12. Ambient (RT13) and Coil (RT21) Sensors Temperature / Resistance Range

Degrees

Fahrenheit

136.3 2680 56.8 16657 21.6 44154 -11.3 123152

133.1 2859 56.0 16973 21.0 44851 -11.9 125787

130.1 3040 55.3 17293 20.5 45560 -12.6 128508

127.3 3223 54.6 17616 20.0 46281 -13.2 131320

124.7 3407 53.9 17942 19.4 47014 -13.9 134227

122.1 3592 53.2 18273 18.9 47759 -14.5 137234

119.7 3779 52.5 18607 18.4 48517 -15.2 140347

117.5 3968 51.9 18945 17.8 49289 -15.9 143571

115.3 4159 51.2 19287 17.3 50074 -16.5 146913

113.2 4351 50.5 19633 16.8 50873 -17.2 150378

111.2 4544 49.9 19982 16.3 51686 -17.9 153974

109.3 4740 49.2 20336 15.7 52514 -18.6 157708

107.4 4937 48.5 20695 15.2 53356 -19.3 161588

105.6 5136 47.9 21057 14.7 54215 -20.1 165624

103.9 5336 47.3 21424 14.1 55089 -20.8 169824

102.3 5539 46.6 21795 13.6 55979 -21.5 174200

100.6 5743 46.0 22171 13.1 56887 -22.3 178762

99.1 5949 45.4 22551 12.5 57811 -23.0 183522

97.6 6157 44.7 22936 12.0 58754 -23.8 188493

96.1 6367 44.1 23326 11.5 59715 -24.6 193691

94.7 6578 43.5 23720 11.0 60694 -25.4 199130

93.3 6792 42.9 24120 10.4 61693 -26.2 204829

92.0 7007 42.3 24525 9.9 62712 -27.0 210805

90.6 7225 41.7 24934 9.3 63752 -27.8 217080

89.4 7444 41.1 25349 8.8 64812 -28.7 223677

88.1 7666 40.5 25769 8.3 65895 -29.5 230621

86.9 7890 39.9 26195 7.7 67000 -30.4 237941

85.7 8115 39.3 26626 7.2 68128 -31.3 245667

84.5 8343 38.7 27063 6.7 69281 -32.2 253834

83.4 8573 38.1 27505 6.1 70458 -33.2 262482

82.3 8806 37.5 27954 5.6 71661 -34.1 271655

81.2 9040 37.0 28408 5.0 72890 -35.1 281400

80.1 9277 36.4 28868 4.5 74147 -36.1 291774

79.0 9516 35.8 29335 3.9 75431 -37.1 302840

78.0 9757 35.2 29808 3.4 76745 -38.2 314669

77.0 10001 34.7 30288 2.8 78090 -39.2 327343

76.0 10247 34.1 30774 2.3 79465

75.0 10496 33.5 31267 1.7 80873

74.1 10747 33.0 31766 1.2 82314

73.1 11000 32.4 32273 0.6 83790

72.2 11256 31.9 32787 0.0 85302

71.3 11515 31.3 33309 -0.5 86852

70.4 11776 30.7 33837 -1.1 88440

69.5 12040 30.2 34374 -1.7 90068

68.6 12306 29.6 34918 -2.2 91738

67.7 12575 29.1 35471 -2.8 93452

66.9 12847 28.6 36031 -3.4 95211

66.0 13122 28.0 36600 -4.0 97016

65.2 13400 27.5 37177 -4.6 98870

64.4 13681 26.9 37764 -5.2 100775

63.6 13964 26.4 38359 -5.7 102733

62.8 14251 25.8 38963 -6.3 104746

62.0 14540 25.3 39577 -6.9 106817

61.2 14833 24.8 40200 -7.5 108948

60.5 15129 24.2 40833 -8.2 1111 41

59.7 15428 23.7 41476 -8.8 113400

59.0 15730 23.2 42130 -9.4 115727

58.2 16036 22.6 42794 -10.0 118126

57.5 16345 22.1 43468 -10.6 120600

Resistance

Degrees

Fahrenheit

Resistance

Degrees

Fahrenheit

Resistance

Degrees

Fahrenheit

Resistance

Page 37

XP14 SERIES

JUMPER

TEST

Placing the jumper on the field test pins (E33) allows the technician to:

 Clear short cycle lockout
 Clear five-strike fault lockout
 Cycle the unit in and out of defrost mode
 Place the unit in defrost mode to clear the coil

When Y1 is energized and 24V power is being applied to the Control, a test cycle can be
initiated by placing a jumper on the Control's TEST pins for 2 to 5 seconds. If the jumper
remains on the TEST pins for longer than five seconds, the Control will ignore the jump
ered TEST pins and revert to normal operation.

The Control will initiate one test event each time a jumper is placed on the TEST pins. For
each TEST the jumper must be removed for at least one second and then reapplied.

Y1 Active

DEMAND DEFROST CONTROL
(UPPER LEFT-HAND CORNER)

Place a jumper on TEST pins for

longer than one second but less
than two seconds.

Clears any short cycle lockout and
five strike fault lockout function, if
applicable. No other functions will be
executed and unit will continue in the
mode it was operating.

If in COOLING Mode

No further test mode operation will be
executed until the jumper is removed
from the TEST pins and reapplied.

Place a jumper on TEST pins for

more than two seconds.

Clears any short cycle lockout and
five strike fault lockout function, if
applicable.

ACTIVE

O Line Status

If in DEFROST Mode

The unit will terminate defrost and
enter HEAT MODE uncalibrated
with defrost timer set for 34 minute
test.

INACTIVE

If in HEATING Mode

If no ambient or coil sensor exist, unit
will go into DEFROST MODE.

If ambient or coil faults exist (open or
shorted), unit will remain in HEAT
MODE.

NOTE — Placing a jumper on the TEST pins will not bring the unit
out of inactive mode. The only way manually activate the heat
pump from an inactive mode is to cycle the 24VAC power to the
Control.

Figure 20. Test Mode (XP14-XXX-230-01 through 07)

If jumper on TEST pins remains in
place for more than five seconds.

The unit will return to HEAT MODE
un−calibrated with defrost timer set
for 34 minutes.

Page 38

If jumper on TEST pins is removed
before a maximum of five seconds.

The unit will remain in DEFROST
MODE until termination on time or
temperature.

DEFROST BOARD DIAGNOSTICS (XP14-XXX-230-01 and later)

See table 13 to determine defrost board operational conditions and to diagnose cause and solution to problems.

Table 13. Defrost Control Board Diagnostic LEDs (XP14-XXX-230-01 through 07)

DS2
Green

OFF OFF Power problem

Simultaneous
SLOW Flash

Alternating SLOW
Flash

Simultaneous
FAST Flash

Alternating
FAST Flash

ON ON Circuit Board Failure

DS1
Red

Condition/Code Possible Cause(s) Solution

1

Check control transformer power (24V).

2

If power is available to board and LED(s) do not
light, replace board.

None required.

None required (Jumper TEST pins to override)

Normal operation

5-minute anti-short cycle
delay

Ambient Sensor Problem

Coil Sensor Problem

No power (24V) to board terminals R
and C or board failure.

Unit operating normally or in standby
mode.

Initial power up, safety trip, end of
room thermostat demand.

Sensor being detected open or shorted or out of temperature range. Board will revert to time/
temperature defrost operation. (System will still heat or cool).

Sensor being detected open or shorted or out of temperature range. Board will not perform
demand or time/temperature defrost operation. (System will still heat or cool).

Indicates that board has internal component failure. Cycle 24 volt power to board. If code does
not clear, replace board.

FAULT and LOCKOUT CODES (Each fault adds 1 strike to that code's counter; 5 strikes per code = LOCKOUT)

1

OFF

OFF ON

SLOW
Flash

ON OFF

SLOW
Flash

FAST
Flash

SLOW
Flash

OFF High Pressure Fault

ON

ON

Low Pressure Fault

Low Pressure LOCKOUT

High Pressure LOCKOUT

Discharge Line Temperature
Fault

Discharge Line Temperature

LOCKOUT

1

Restricted air flow over indoor or
outdoor coil.

2

Improper refrigerant charge in
system.

3

Improper metering device installed or
incorrect operation of metering
device.

4

Incorrect or improper sensor location
or connection to system.

This model does not have a defrost line sensor, therefore this code is not applicable.

Remove any blockages or restrictions from coils
and/or fans. Check indoor and outdoor fan motor for
proper current draws.

2

Check system charge using approach and subcool
ing temperatures.

3

Check system operating pressures and compare to
unit charging charts.

4

Make sure all pressure switches and sensors have
secure connections to system to prevent refrigerant
leaks or errors in pressure and temperature mea
surements.

OFF

Fast
Flash

Fast
Flash

OFF

Discharge Sensor Fault

Discharge Sensor

LOCKOUT

The XP14 series units does not use a defrost line sensor. However, a resistor is installed
across pins P4-1 and P4-2. If the resistor is missing or damage then this fault code will be
displayed.

This model does not have a defrost line sensor, therefore this code is not applicable.

Page 39

XP14 SERIES

System Operation (XP14-XXX-230-08 and
Later)

IMPORTANT

Some scroll compressor have 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.

High Pressure Switch (S4)

This unit is equipped with a auto‐reset high pressure
switch (single-pole, single-throw) which is located on the
liquid line. The switch shuts off the compressor when
discharge pressure rises above the factory setting. High

Pressure (auto reset) - trip at 590 psig, reset at 418 psig.

Low Pressure Switch (S87)

This unit is equipped an auto-reset low pressure switch
which is located on the vapor line. The switch shuts off the
compressor when the vapor pressure falls below the
factory setting. Low Pressure (auto reset) - trip at 25 psig,
reset at 40 psig.

Low Pressure Switch Bypass (S41) (Optional)

For use in applications where the heat pump is operated in
outdoor ambient temperatures below 15°F.

 Prevents nuisance trips form the low pressure switch
 Wired in parallel with the low pressure switch

Thermal Protection Switch (S173) — Compressor

Mounted

Some units are equipped with a compressor mounted
normally closed temperature switch that prevents
compressor damage due to overheating caused by
internal friction. The switch is located on top of the
compressor casing (see figure 1). This switch senses the
compressor casing temperature and opens at 239-257°F
(115°C-125°C) to shut off compressor operation. The
auto-reset switch closes when the compressor casing
temperature falls to 151-187°F (66°C-86°C), and the
compressor is re-energized. This single-pole, single-throw
(SPST) bi-metallic switch is wired in series with the 24V Y
input signal to control compressor operation.

Crankcase Thermostat (S40) (-036, -042, -048 and

-060 Units Only)

The reference models are equipped with a 70 watt, belly
band type crankcase heater. HR1 prevents liquid from
accumulating in the compressor. HR1 is controlled by a
thermostat located on the liquid line. When liquid line
temperature drops below 50° F the thermostat closes
energizing HR1. The thermostat will open, de-energizing
HR1 once liquid line temperature reaches 70° F .

Defrost Thermostat (S6)

The defrost thermostat is located on the liquid line between
the check/expansion valve and the distributor. When
defrost thermostat senses 42°F (5.5°C) or cooler, the
thermostat contacts close and send a signal to the defrost
control to start the defrost timing. It also terminates defrost
when the liquid line warms up to 70°F (21°C).

Page 40

Bi-Flow Liquid Line Filter Drier

The unit is equipped with a large-capacity biflow filter drier
which keeps the system clean and dry. If replacement is
necessary, order another of the same design and capacity.
The replacement filter drier must be suitable for use with
HFC-410A refrigerant.

Defrost System (XP14-XXX-230-08 and
Later)

The XP14 defrost system includes two components: a
defrost thermostat (S6) and a defrost control (CMC1)
(figure 23).

DEFROST CONTROL (CMC1)

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

P1 - FIELD SELECT

TIMING PINS

TEST

PINS

DIAGNOSTIC

COMPRESSOR

LOW PRESSURE

THERMOSTAT

HIGH PRESSURE

P5 -

DELAY PINS

REVERSING

VALV E

S87

SWITCH

DEFROST

S4

SWITCH

Figure 21. Outdoor Unit Defrost Control (CMC1)

(XP14-XXX-230-08 and Later)

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 21). The
maximum defrost period is 14 minutes and cannot be
adjusted.

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

 Units with defrost control 100269-02: Factory default

is 60 minutes

 Units with defrost control 100269-04: Factory default

is 90 minutes
If the timing selector jumper is missing, the defrost
control defaults to a 90-minute defrost interval.

LEDS

24V TERMINAL
STRIP
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.

 Units with defrost control 100269-02: The compressor

will be cycled off for 30 seconds going in and out of the
defrost mode when the compressor delay jumper is
removed.

 Units with defrost control 100269-04: 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 control
will ignore the test pins. When the jumper is placed across
the TEST pins for two 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
re-applied.

Pressure Switch Circuit

The defrost control incorporates two pressure switch
circuits. The high pressure switch (S4) is

factory‐connected to the defrost control's HI PS terminals
(see figure 21). The defrost control also includes a low
pressure, or loss‐of‐charge‐pressure, switch (S87).
Switches are shown in wiring diagrams in figure 23.

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 defrost control. In
addition, the diagnostic LEDs will indicate a locked‐out
pressure switch after the fifth occurrence of an open
pressure switch as listed in table 14. The unit will remain
locked out until power to the defrost control is interrupted,
then re‐established or until the jumper is applied to the
TEST pins for 0.5 seconds.

Defrost Control Diagnostic LEDs

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

Table 14. Defrost Control (CMC1) Diagnostic LED

(XP14-XXX-230-08 and Later)

Mode

No power to control OFF OFF

Normal operation / power
to control

Anti‐short cycle lockout Alternating Slow FLASH

Low pressure switch fault OFF Slow FLASH

Low pressure switch
lockout

High pressure switch fault Slow FLASH OFF

High pressure switch
lockout

Green LED
(DS2)

Simultaneous Slow FLASH

OFF ON

ON OFF

Red LED (DS1)

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

S during the TEST mode,
S during the defrost cycle,
S during the 90‐second start‐up period,
S and for the first 90 seconds each time the reversing

valve switches heat/cool modes.

Page 41

XP14 SERIES

Maintenance

Maintenance and service must be performed by a qualified
installer or service agency. At the beginning of each
cooling season, the system should be checked as follows:

Outdoor Unit

1. Clean and inspect the outdoor coil. The coil may be
flushed with a water hose. Ensure the power is turned
off before you clean the coil.

2. Outdoor fan motor is prelubricated and sealed. No
further lubrication is needed.

3. Visually inspect connecting lines and coils for
evidence of oil leaks.

4. Check wiring for loose connections.

5. Check for correct voltage at the unit (with the unit
operating).

6. Check amp-draw outdoor fan motor.

UNIT NAMEPLATE: _________ ACTUAL: __________

NOTE - If owner reports insufficient cooling, the unit should
be gauged and refrigerant charge checked.

Outdoor Coil

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 (e.g., pet
urine, cottonwood seeds, fertilizers, fluids that may
contain high levels of corrosive chemicals such as salts)

 Outdoor Coil — The outdoor coil may be flushed with

a water hose.

 Outdoor Coil (Sea Coast) — Moist air in ocean

locations can carry salt, which is corrosive to most
metal. Units that are located near the ocean require
frequent inspections and maintenance. These
inspections will determine the necessary need to wash
the unit including the outdoor coil. Consult your
installing contractor for proper intervals/procedures
for your geographic area or service contract.

INDOOR UNIT

1. Clean or change filters.

2. Adjust blower speed for cooling. Measure the pressure
drop over the coil to determine the correct blower CFM.
Refer to the unit information service manual for pressure
drop tables and procedure.

3. Check blower drive belt for wear and proper tension.

4. Check all wiring for loose connections

5. Check for correct voltage at unit (blower operating).

6. Check amp-draw on blower motor.

UNIT NAMEPLATE: _________ ACTUAL: __________

INDOOR COIL

1. Clean coil, if necessary.

2. Check connecting lines and coils for signs of oil leaks.

3. Check condensate line and clean, if necessary.

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

Page 42

Unit Wiring Diagram and Sequence of Operations

Figure 22. XP14 Unit Wiring Diagram (XP14-XXX-230-01 through 07)

Page 43

XP14 SERIES

Figure 23. Typical Unit Wiring Diagram (XP14-XXX-230-08 and later)

Page 44

Figure 24. Typical Factory Wiring (Copeland Compressor) (XP14-XXX-230-08 and later)

Page 45

XP14 SERIES

Figure 25. Typical Factory Wiring (Interlink Compressor) (XP14-XXX-230-08 and later)

Page 46

SEQUENCE OF OPERATIONS

This is the sequence of operation for XP14 series units.
The sequence is outlined by numbered steps which
correspond to circled numbers on the adjacent diagram.
The steps are identical for both cooling and first stage
heating demand with the exception reversing valve L1 is
energizedduringcoolingdemandandde-energizedduring
heating demand.

NOTE- Transformer in indoor unit supplies power (24 VAC)
to the thermostat and outdoor unit controls.

COOLING:

Internal thermostat wiring energizes terminal O by cooling
mode selection, energizing the reversing valve L1.

1. Demand initiates at Y1 in the thermostat.

2. 24VAC energizes compressor contactor K1.

3. K1‐1 N.O. closes, energizing compressor (B1) and
outdoor fan motor (B4).

END OF COOLING DEMAND:

1. Demand is satisfied. Terminal Y1 is de‐energized.

2. Compressor contactor K1 is de‐energized.

3. K1‐1 opens and compressor (B1) and outdoor fan
motor (B4) are de‐energized and stop immediately.

FIRST STAGE HEAT:

Internal thermostat wiring de-energizes terminal O by
heating mode selection, de-energizing the reversing valve
L1.

See steps 1, 2 and 3.

END OF FIRST STAGE HEAT:

See steps 4, 5 and 6.

DEFROST MODE:

When a defrost cycle is initiated, the control energizes the
reversing valve solenoid and turns off the condenser fan.
The control will also put 24VAC on the “W1” (auxiliary heat)
line. The unit will stay in this mode until either the coil
sensor temperature is above the selected termination
temperature, the defrost time of 14 minutes has been
completed, or the room thermostat demand cycle has
been satisfied. (If the temperature select shunt is not
installed, the default termination temperature will be 90°F.)
If the room thermostat demand cycle terminates the cycle,
the defrost cycle will be held until the next room thermostat
demand cycle. If the coil sensor temperature is still below
the selected termination temperature, the control will
continue the defrost cycle until the cycle is terminated in
one of the methods mentioned above. If a defrost is
terminated by time and the coil temperature did not remain
above 35°F (2°C) for 4 minutes the control will go to the
30-minute Time/Temperature mode.

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:

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 Temp.

Vapor Pressure;

Refrigerant Lines: Leak Checked?  Properly Insulated?  Outdoor Fan Checked? 

Service Valves: Fully Opened?  Caps Tight?  Voltage With Compressor Operating

SEQUENCE OF OPERATION

Heating Correct?  Cooling Correct? 

Calibrated? 

THERMOSTAT

Properly Set?  Level? 

Page 47

XP14 SERIES

HFC-410A CHARGING INFORMATION — FOR COMPLETE CHARGING DETAILS, REFER TO THE OUTDOOR UNIT INSTALLATION AND SERVICE PROCEDURE

Maintenance checks using the Normal Operating Pressures table

Table 2 may be used to help perform maintenance checks. This table is not a procedure for charg
ing the system and any minor variations in the pressures may be expected due to differences in
installations. However, significant deviations could mean that the system is not properly charged
or that a problem exists with some component in the system.

Charge Using the Subcooling Method

Cooling Mode—When the outdoor ambient temperature is 60°F (15°C) and above, use the cool
ing mode to adjust the charge using the subcooling method. Target subcooling values in table
1 are based on 70 to 80°F (21-27°C) indoor return air temperature.
Heating Mode—When the outdoor ambient temperature is below 60°F (15°C), use the heating
mode to adjust the charge using the subcooling charge levels (table ). Target subcooling values
in table 1 are based on 65-75°F (18-24°C) indoor return air temperature.

Matchups/Charge Levels and Line Set Lengths

Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels for
the various sizes of outdoor units. Charge levels on the unit nameplate are based on installa

tions with 15' (4.6m) line sets; be sure to consider any difference in line set length (see
Installation Instructions for more details).

Charge Using the Weigh‐in Method

If the system is void of refrigerant, locate and repair any leaks and then weigh in the refrigerant
charge into the unit. For charge adjustments, be sure to consider line set length differences and,
referring to table 1, adjust for the matchup difference.

1 - Recover the refrigerant from the unit.
2 - Conduct leak check; evacuate as previously outlined.
3 - Weigh in the unit nameplate charge, adjusting for matchup and line set length differences.

If weighing facilities are not available use the Subcooling method.

Table 1 - Normal Operating Pressures (Liquid +10 and Suction +5 psig)

Heating Mode Cooling Mode

ºF (ºC)* 20 30 40 50 60 65 70 75 80 85 90 95 100 105 110 11 5

SIZE

VAP /LI Q VA P/L IQ VAP/ LIQ VAP/ LIQ VAP/ LI Q VAP /LI Q VA P/L IQ VAP/ LIQ VAP/ LIQ VAP/ LIQ VAP/ LI Q VAP /L IQ VA P/ LIQ VAP/ LIQ VAP/ LI Q VAP /L IQ

-018 65/289 80/304 97/322 116/341 137/360 132/224 134/239 135/257 136/279 138/300 138/322 140/344 141/369 142/395 145/421 146/481

-024 58/281 72/295 88/ 309 105/324 123/340 139/243 140/262 142/281 143/302 144/325 145/348 145/373 146/399 147/426 147/454 148/483

-030 55/274 69/286 84/ 299 102/313 122/327 135/250 136/268 138/288 140/308 141/330 143/352 144/376 145/400 147/426 148/452 149/480

-036 62/287 76/304 91/ 322 106/342 124/365 135/230 137/248 139/268 141/288 143/311 145/334 146/359 148/385 150/412 151/441 153/471

-042 58/293 73/335 89/ 368 108/394 130/411 127/215 129/234 131/254 132/275 134/298 136/321 137/346 139/371 140/398 141/426 142/455

-048 60/282 75/299 90/ 316 105/334 121/353 136/219 137/237 138/256 139/277 140/298 141/321 142/344 143/369 144/395 146/422 147/450

-060 56/266 70/285 84/ 309 99/ 337 114/369 132/222 133/241 134/262 135/283 137/306 138/330 139/354 141/380 142/406 143/434 144/463

*Temperature of the air entering the outside coil.

Table 2 - Indoor Unit Matches and Subcooling Charge Levels and Additional Charge

HP

Size

Indoor Coil or Air
Handler

Subcool

Additional

Charge

HP

Size

Indoor Coil or Air
Handler

Subcool

Additional

Charge

HP

Size

Indoor Coil or Air
Handler

Subcool

Additional

Charge

Heat

(+5ºF)

Cool

(+1ºF)

Heat

(+5ºF)

Cool

(+1ºF)

Heat

(+5ºF)

Cool

(+1ºF)

lbs oz lbs oz lbs oz

CBX25UH-018
CBX25UHV-018

13 3 0 0

CH33-36B 6 3 0 0

CH33-49C 16 6 1 6

-018

CBX27UH-018 8 9 1 2

-030

CH33-36C 10 11 1 5 CH33-50, -60C 10 9 3 4

CBX27UH-024 8 9 1 2 CH33-42B 16 18 2 6

-042

CH33-60D 12 8 0 9
CBX32MV-018/024 9 4 0 3 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7
CH33-25A 10 6 0 9 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4
CH33-25B 11 5 0 4 CX34-31 17 15 2 10 CR33-60D 29 5 0 4
CR33-30/36 18 5 0 9 CX34-36 25 6 0 10 CX34-49 11 6 1 4
CX34-25 8 4 0 9 CX34-38 10 19 2 14 CX34-50, -60 25 8 1 15
CX34-31 10 7 0 8 CX34-42 25 6 0 10 CX34-60 8 8 1 4

-024

CBX25UH-024
CBX25UHV-024

6 6 0 9 CX34-43 13 17 2 14 CX34-62C 8 11 3 10

CBX25UH-030
CBX25UHV-030

17 3 0 15 CX34-44, -48 9 21 2 12 CX34-62D 11 7 1 15

CBX26UH-024 17 3 0 15

-036

CBX25UH-036
CBX25UHV-036

31 3 0 4

-048

CBX25UH-048

CBX25UHV-048

15 6 2 5

CBX27UH-024 12 12 1 2 CBX26UH-036 31 3 0 4 CBX26UH-048 20 10 3 11
CBX27UH-030 11 11 2 1 CBX27UH-036 18 3 0 5 CBX27UH-048 16 6 0 0
CBX32M-018, -024 14 11 0 4 CBX27UH-042 11 4 0 1 CBX27UH-060 12 6 1 4
CBX32M-030 12 12 1 2 CBX27UH-048 11 4 0 1 CBX32M-048 16 6 0 0
CBX32MV-018/024 14 11 0 4 CBX32M-036 18 3 0 5 CBX32M-060 20 8 1 0
CBX32MV-024/030 12 12 1 2 CBX32M-042 18 3 0 5 CBX32MV-048 16 6 0 0
CBX32MV-036 11 11 2 1 CBX32MV-036 18 3 0 5 CBX32MV-060 20 8 1 0
CBX40UHV-024 11 11 2 1 CBX32MV-048 11 4 0 1 CBX32MV-068 10 8 4 5
CBX40UHV-030 11 11 2 1 CBX40UHV-042 11 4 0 1 CBX40UHV-048 16 6 0 0
CH23-41 10 3 0 0 CBX40UHV-048 11 4 0 1 CBX40UHV-060 20 8 1 0
CH33-25A 20 10 1 1 CBX40UHV-036 18 3 0 5 CH23-68 24 6 2 8
CH33-25B 19 8 1 2 CH33-43B 14 8 2 1 CH33-50, -60C 17 6 1 5
CH33-31A 15 11 1 15 CH33-43C 26 9 2 10 CH33-60D 18 6 0 13
CH33-36C 10 12 0 0 CH33-44/48B 24 8 2 3 CH33-62D 13 7 3 6
CH33-36A 20 10 1 1 CH33-48C 26 9 2 10 CR33-50/60 19 6 1 1
CR33-30, -036 17 4 0 14 CH33-49C 15 8 2 12 CR33-60 19 6 1 1
CX34-25 15 9 0 15 CH33-50/60C 15 8 2 12 CX34-49C 10 6 1 9
CX34-31 15 16 0 9 CR33-48 38 5 0 0 CX34-60 28 7 3 14
CX34-36 26 6 0 9 CR33-50, -60 15 5 1 4 CX34-62C 10 6 3 12
CX34-38 10 18 1 14 CX34-38 15 4 0 9 CX34-62D 14 7 3 12

-030

CBX25UH-030
CBX25UHV-030

9 3 0 8 CX34-43 23 8 2 8

-060

CBX25UH-060

CBX25UHV-060

15 6 2 0

CBX25UH-036 19 11 1 5 CX34-44/48 40 4 0 15 CBX26UH-060 31 6 3 0
CBX26UH-030 19 11 1 5 CX34-49 11 7 3 9 CBX27UH-060 13 7 0 8
CBX27UH-030 10 16 1 14 CX34-50/60 23 8 2 8 CBX32M-060 17 5 1 4

CBX27UH-036 10 16 1 14

-042

CBX25UH-042
CBX25UHV-042

42 5 0 8 CBX32MV-048 20 6 0 0

CBX32M-030 7 10 1 3 CBX26UH-042 42 5 0 8 CBX32MV-060 17 5 1 4
CBX32M-036 10 16 1 14 CBX27UH-042, -048 13 5 2 2 CBX32MV-068 11 8 2 12
CBX32MV-024/030 7 10 1 3 CBX32M-048 13 5 2 2 CBX40UHV-048 20 6 0 0
CBX32MV-036 10 16 1 14 CBX32MV-048 13 5 2 2 CBX40UHV-060 17 5 1 4
CBX40UHV-030 10 16 1 14 CBX40UHV-042 13 5 2 2 CH23-68 27 7 0 13
CBX40UHV-036 10 16 1 14 CBX40UHV-048 13 5 2 2 CH33-50, -60C 11 4 0 0
CH23-41 11 4 0 8 CH23-68 20 9 1 5 CH33-62D 19 6 2 4
CH23-51 11 6 0 14 CH33-43B 7 9 3 2 CR33-50/60 19 6 2 4
CH33-31A 16 18 2 8 CH33-43C 22 5 1 0 CR33-60 23 6 1 3
CH33-31B 16 18 2 6 CH33-44/48B 18 4 0 0 CX34-62C 10 7 2 14
CH33-36A 10 6 0 6 CH33-48C 22 5 1 0 CX34-62D 19 7 3 2

The values in this table are most popular match-up pressures; indoor match-up, indoor air quantity, and indoor load will cause the pressures to vary. *Amount of charge required in addition to charge shown on unit

nameplate.

HFC-410A CHARGING INFORMATION — FOR COMPLETE CHARGING DETAILS, REFER TO THE OUTDOOR UNIT INSTALLATION AND SERVICE PROCEDURE

Maintenance checks using the Normal Operating Pressures table

Table 2 may be used to help perform maintenance checks. This table is not a procedure for charg
ing the system and any minor variations in the pressures may be expected due to differences in
installations. However, significant deviations could mean that the system is not properly charged
or that a problem exists with some component in the system.

Charge Using the Subcooling Method

Cooling Mode—When the outdoor ambient temperature is 60°F (15°C) and above, use the cool
ing mode to adjust the charge using the subcooling method. Target subcooling values in table
1 are based on 70 to 80°F (21-27°C) indoor return air temperature.
Heating Mode—When the outdoor ambient temperature is below 60°F (15°C), use the heating
mode to adjust the charge using the subcooling charge levels (table ). Target subcooling values
in table 1 are based on 65-75°F (18-24°C) indoor return air temperature.

Matchups/Charge Levels and Line Set Lengths

Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels for
the various sizes of outdoor units. Charge levels on the unit nameplate are based on installa

tions with 15ft. (4.6m) line sets; on line sets with 3/8"(9.5mm) liquid line, add 3oz. addition
al refrigerant for every 5ft. longer than 15ft. If line length is less than 15ft., subtract this
amount (see Installation Instructions for more details).

Charge Using the Weigh‐in Method

If the system is void of refrigerant, locate and repair any leaks and then weigh in the refrigerant
charge into the unit. For charge adjustments, be sure to consider line set length differences and,
referring to table 1, adjust for the matchup difference.
1 - Recover the refrigerant from the unit.
2 - Conduct leak check; evacuate as previously outlined.
3 - Weigh in the unit nameplate charge, adjusting for matchup and line set length differences.

If weighing facilities are not available use the Subcooling method.

Table 1 - Normal Operating Pressures (Liquid +10 and Suction +5 psig)

Heating Mode Cooling Mode

ºF (ºC)* 20 30 40 50 60 65 70 75 80 85 90 95 100 105 110 11 5

SIZE

VAP /LI Q VA P/L IQ VAP/ LIQ VAP/ LIQ VAP/ LI Q VAP /LI Q VA P/L IQ VAP/ LIQ VAP/ LIQ VAP/ LIQ VAP/ LI Q VAP /L IQ VA P/ LIQ VAP/ LIQ VAP/ LI Q VAP /L IQ

-018 65/289 80/304 97/322 116/341 137/360 132/224 134/239 135/257 136/279 138/300 138/322 140/344 141/369 142/395 145/421 146/481

-024 58/281 72/295 88/ 309 105/324 123/340 139/243 140/262 142/281 143/302 144/325 145/348 145/373 146/399 147/426 147/454 148/483

-030 55/274 69/286 84/ 299 102/313 122/327 135/250 136/268 138/288 140/308 141/330 143/352 144/376 145/400 147/426 148/452 149/480

-036 62/287 76/304 91/ 322 106/342 124/365 135/230 137/248 139/268 141/288 143/311 145/334 146/359 148/385 150/412 151/441 153/471

-042 58/293 73/335 89/ 368 108/394 130/411 127/215 129/234 131/254 132/275 134/298 136/321 137/346 139/371 140/398 141/426 142/455

-048 60/282 75/299 90/ 316 105/334 121/353 136/219 137/237 138/256 139/277 140/298 141/321 142/344 143/369 144/395 146/422 147/450

-060 56/266 70/285 84/ 309 99/ 337 114/369 132/222 133/241 134/262 135/283 137/306 138/330 139/354 141/380 142/406 143/434 144/463

*Temperature of the air entering the outside coil.

Table 2 - Indoor Unit Matches and Subcooling Charge Levels and Additional Charge**

HP

Size

Indoor Coil or Air
Handler

Subcool

Additional

Charge

HP

Size

Indoor Coil or Air
Handler

Subcool

Additional

Charge

HP

Size

Indoor Coil or Air

Handler

Subcool

Additional

Charge

Heat

(+

5ºF)

Cool

(+1ºF)

Heat

(+

5ºF)

Cool

(+1ºF)

Heat

(+

5ºF)

Cool

(+1ºF)

lbs oz lbs oz lbs oz

CBX25UH-018
CBX25UHV-018

13 3 0 0

CH33-36B 6 3 0 0

CH33-49C 16 6 1 6

CBX25UH-024 15 5 0 7

-030

CH33-36C 10 11 1 5 CH33-50, -60C 10 9 3 4

-018

CBX27UH-018 8 9 1 2 CH33-42B 16 18 2 6

-042

CH33-60D 12 8 0 9
CBX27UH-024 8 9 1 2 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7
CBX32MV-018/024 9 4 0 3 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4
CH33-25A 10 6 0 9 C33 / CX34-31 17 15 2 10 CR33-60D 29 5 0 4
CH33-25B 11 5 0 4 C33 / CX34-36 25 6 0 10 C33 / CX34-49 11 6 1 4
CR33-30/36 18 5 0 9 C33 / CX34-38 10 19 2 14 C33 / CX34-50, -60 25 8 1 15
C33 / CX34-25 8 4 0 9 C33 / CX34-42 25 6 0 10 C33 / CX34-60 8 8 1 4
C33 / CX34-31 10 7 0 8 C33 / CX34-43 13 17 2 14 C33 / CX34-62C 8 11 3 10

-024

CBX25UH-024
CBX25UHV-024

6 6 0 9 C33 / CX34-44, -48 9 21 2 12 C33 / CX34-62D 11 7 1 15

CBX25UH-030
CBX25UHV-030

17 3 0 15

-036

CBX25UH-036
CBX25UHV-036

31 3 0 4

-048

CBX25UH-048

CBX25UHV-048

15 6 2 5

CBX26UH-024 17 3 0 15 CBX26UH-036 31 3 0 4 CBX26UH-048 20 10 3 11
CBX27UH-024 12 12 1 2 CBX27UH-036 18 3 0 5 CBX27UH-048 16 6 0 0
CBX27UH-030 11 11 2 1 CBX27UH-042 11 4 0 1 CBX27UH-060 12 6 1 4
CBX32M-018, -024 14 11 0 4 CBX27UH-048 11 4 0 1 CBX32M-048 16 6 0 0
CBX32M-030 12 12 1 2 CBX32M-036 18 3 0 5 CBX32M-060 20 8 1 0
CBX32MV-018/024 14 11 0 4 CBX32M-042 18 3 0 5 CBX32MV-048 16 6 0 0
CBX32MV-024/030 12 12 1 2 CBX32MV-036 18 3 0 5 CBX32MV-060 20 8 1 0
CBX32MV-036 11 11 2 1 CBX32MV-048 11 4 0 1 CBX32MV-068 10 8 4 5
CBX40UHV-024 11 11 2 1 CBX40UHV-042 11 4 0 1 CBX40UHV-048 16 6 0 0
CBX40UHV-030 11 11 2 1 CBX40UHV-048 11 4 0 1 CBX40UHV-060 20 8 1 0
CH23-41 10 3 0 0 CBX40UHV-036 18 3 0 5 CH23-68 24 6 2 8
CH33-25A 20 10 1 1 CH33-43B 14 8 2 1 CH33-50, -60C 17 6 1 5
CH33-25B 19 8 1 2 CH33-43C 26 9 2 10 CH33-60D 18 6 0 13
CH33-31A 15 11 1 15 CH33-44/48B 24 8 2 3 CH33-62D 13 7 3 6
CH33-36C 10 12 0 0 CH33-48C 26 9 2 10 CR33-50/60 19 6 1 1
CH33-36A 20 10 1 1 CH33-49C 15 8 2 12 CR33-60 19 6 1 1
CR33-30, -036 17 4 0 14 CH33-50/60C 15 8 2 12 C33 / CX34-49C 10 6 1 9
C33 / CX34-25 15 9 0 15 CR33-48 38 5 0 0 C33 / CX34-60 28 7 3 14
C33 / CX34-31 15 16 0 9 CR33-50, -60 15 5 1 4 C33 / CX34-62C 10 6 3 12
C33 / CX34-36 26 6 0 9 C33 / CX34-38 15 4 0 9 C33 / CX34-62D 14 7 3 12

-030

CBX25UH-030
CBX25UHV-030

9 3 0 8 C33 / CX34-43 23 8 2 8

-060

CBX25UH-060

CBX25UHV-060

15 6 2 0

CBX25UH-036 19 11 1 5 C33 / CX34-44/48 40 4 0 15 CBX26UH-060 31 6 3 0
CBX26UH-030 19 11 1 5 C33 / CX34-49 11 7 3 9 CBX27UH-060 13 7 0 8
CBX27UH-030 10 16 1 14 C33 / CX34-50/60 23 8 2 8 CBX32M-060 17 5 1 4

CBX27UH-036 10 16 1 14

-042

CBX25UH-042
CBX25UHV-042

42 5 0 8 CBX32MV-048 20 6 0 0

CBX32M-030 7 10 1 3 CBX26UH-042 42 5 0 8 CBX32MV-060 17 5 1 4
CBX32M-036 10 16 1 14 CBX27UH-042, -048 13 5 2 2 CBX32MV-068 11 8 2 12
CBX32MV-024/030 7 10 1 3 CBX32M-048 13 5 2 2 CBX40UHV-048 20 6 0 0
CBX32MV-036 10 16 1 14 CBX32MV-048 13 5 2 2 CBX40UHV-060 17 5 1 4
CBX40UHV-030 10 16 1 14 CBX40UHV-042 13 5 2 2 CH23-68 27 7 0 13
CBX40UHV-036 10 16 1 14 CBX40UHV-048 13 5 2 2 CH33-50, -60C 11 4 0 0
CH23-41 11 4 0 8 CH23-68 20 9 1 5 CH33-62D 19 6 2 4
CH23-51 11 6 0 14 CH33-43B 7 9 3 2 CR33-50/60 19 6 2 4
CH33-31A 16 18 2 8 CH33-43C 22 5 1 0 CR33-60 23 6 1 3
CH33-31B 16 18 2 6 CH33-44/48B 18 4 0 0 C33 / CX34-62C 10 7 2 14
CH33-36A 10 6 0 6 CH33-48C 22 5 1 0 C33 / CX34-62D 19 7 3 2

The values in this table are most popular match-up pressures; indoor match-up, indoor air quantity, and indoor load will cause the pressures to vary. **Amount of charge required in addition to charge shown on unit name

plate.



NOTE - When you have a C33 coil (cased or uncased) with a TXV installed, use the CX34 charge info.

HFC-410A CHARGING INFORMATION — FOR COMPLETE CHARGING DETAILS, REFER TO THE OUTDOOR UNIT INSTALLATION AND SERVICE PROCEDURE

Maintenance checks using the Normal Operating Pressures table

Table 2 may be used to help perform maintenance checks. This table is not a procedure for charg
ing the system and any minor variations in the pressures may be expected due to differences in
installations. However, significant deviations could mean that the system is not properly charged
or that a problem exists with some component in the system.

Charge Using the Subcooling Method

Cooling Mode—When the outdoor ambient temperature is 60°F (15°C) and above, use the cool
ing mode to adjust the charge using the subcooling method. Target subcooling values in table
1 are based on 70 to 80°F (21-27°C) indoor return air temperature.
Heating Mode—When the outdoor ambient temperature is below 60°F (15°C), use the heating
mode to adjust the charge using the subcooling charge levels (table ). Target subcooling values
in table 1 are based on 65-75°F (18-24°C) indoor return air temperature.

Matchups/Charge Levels and Line Set Lengths

Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels for
the various sizes of outdoor units. Charge levels on the unit nameplate are based on installa

tions with 15ft. (4.6m) line sets; on line sets with 3/8"(9.5mm) liquid line, add 3oz. addition
al refrigerant for every 5ft. longer than 15ft. If line length is less than 15ft., subtract this
amount (see Installation Instructions for more details).

Charge Using the Weigh‐in Method

If the system is void of refrigerant, locate and repair any leaks and then weigh in the refrigerant
charge into the unit. For charge adjustments, be sure to consider line set length differences and,
referring to table 1, adjust for the matchup difference.
1 - Recover the refrigerant from the unit.
2 - Conduct leak check; evacuate as previously outlined.
3 - Weigh in the unit nameplate charge, adjusting for matchup and line set length differences.

If weighing facilities are not available use the Subcooling method.

Table 1 - Normal Operating Pressures (Liquid +10 and Suction +5 psig)

ºF (ºC)* 20 30 40 50 60 65 70 75 80 85 90 95 100 105 110 11 5

SIZE

-018 65/289 80/304 97/322 116/341 137/360 132/224 134/239 135/257 136/279 138/300 138/322 140/344 141/369 142/395 145/421 146/481

-024 58/281 72/295 88/ 309 105/324 123/340 139/243 140/262 142/281 143/302 144/325 145/348 145/373 146/399 147/426 147/454 148/483

-030 55/274 69/286 84/ 299 102/313 122/327 135/250 136/268 138/288 140/308 141/330 143/352 144/376 145/400 147/426 148/452 149/480

-036 62/287 76/304 91/ 322 106/342 124/365 135/230 137/248 139/268 141/288 143/311 145/334 146/359 148/385 150/412 151/441 153/471

-042 58/293 73/335 89/ 368 108/394 130/411 127/215 129/234 131/254 132/275 134/298 136/321 137/346 139/371 140/398 141/426 142/455

-048 60/282 75/299 90/ 316 105/334 121/353 136/219 137/237 138/256 139/277 140/298 141/321 142/344 143/369 144/395 146/422 147/450

-060 56/266 70/285 84/ 309 99/ 337 114/369 132/222 133/241 134/262 135/283 137/306 138/330 139/354 141/380 142/406 143/434 144/463

*Temperature of the air entering the outside coil.

VAP /LI Q VA P/L IQ VAP/ LIQ VAP/ LIQ VAP/ LI Q VAP /LI Q VA P/L IQ VAP/ LIQ VAP/ LIQ VAP/ LIQ VAP/ LI Q VAP /L IQ VA P/ LIQ VAP/ LIQ VAP/ LI Q VAP /L IQ

Heating Mode Cooling Mode

Table 2 - Indoor Unit Matches and Subcooling Charge Levels and Additional Charge**

HP

Indoor Coil or

Size

Air Handler

CBX25UH-018
CBX25UHV-018
CBX25UH-024 15 5 0 7 CH33-42B 16 18 2 6 CH33-60D 12 8 0 9
CBX27UH-018/024 8 9 1 2 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7
CBX32MV-018/024 9 4 0 3 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4
CBA27UHE-018/024 12 10 1 2 C37/CX38/C33/CX34-31 17 15 2 10 CR33-60D 29 5 0 4

-018

CH33-25A 10 6 0 9 C37/CX38/C33/CX34-36 25 6 0 10 C37/CX38/C33/CX34-49 11 6 1 4

CH33-25B 11 5 0 4 C37/CX38/C33/CX34-38 10 19 2 14

CR33-30/36 18 5 0 9 C37/CX38/C33/CX34-42 25 6 0 10 C37/CX38/C33/CX34-60 8 8 1 4
C37/CX38/C33/CX34-25 8 4 0 9 C37/CX38/C33/CX34-43 13 17 2 14 C37/CX38/C33/CX34-62C 8 11 3 10

C37/CX38/C33/CX34-31 10 7 0 8

CBX25UH-024
CBX25UHV-024
CBX25UH-030
CBX25UHV-030
CBX26UH-024 17 3 0 15 CBX27UH-036 18 3 0 5 CBX27UH-048 16 6 0 0
CBX27UH-024 12 12 1 2 CBX27UH-042 11 4 0 1 CBX27UH-060 12 6 1 4
CBX27UH-030 11 11 2 1 CBX27UH-048 11 4 0 1 CBX32M-048 16 6 0 0
CBX32M-018/024 14 11 0 4 CBX32M-036/042 18 3 0 5 CBX32M-060 20 8 1 0
CBX32M-030 12 12 1 2 CBX32MV-036 18 3 0 5 CBX32MV-048 16 6 0 0
CBX32MV-018/024 14 11 0 4 CBX32MV-048 11 4 0 1 CBX32MV-060 20 8 1 0
CBX32MV-024/030 12 12 1 2 CBX40UHV-042 11 4 0 1 CBX32MV-068 10 8 4 5
CBX32MV-036 11 11 2 1 CBX40UHV-048 11 4 0 1 CBX40UHV-048 16 6 0 0
CBX40UHV-024/030 11 11 2 1 CBX40UHV-036 18 3 0 5 CBX40UHV-060 20 8 1 0

-024
CBA27UHE-024 16 11 1 7 CBA27UHE-036 20 5 0 0 CBA27UHE-048 16 6 1 6

CBA27UHE-030 13 11 1 3 CBA27UHV-042 16 6 0 11 CBA27UHE-060 12 7 2 3
CH23-41 10 3 0 0 CH33-43B 14 8 2 1 CH23-68 24 6 2 8
CH33-25A 20 10 1 1 CH33-43C 26 9 2 10 CH33-50, -60C 17 6 1 5
CH33-25B 19 8 1 2 CH33-44/48B 24 8 2 3 CH33-60D 18 6 0 13
CH33-31A 15 11 1 15 CH33-48C 26 9 2 10 CH33-62D 13 7 3 6
CH33-36C 10 12 0 0 CH33-49C 15 8 2 12 CR33-50/60 19 6 1 1
CH33-36A 20 10 1 1 CH33-50/60C 15 8 2 12 CR33-60 19 6 1 1
CR33-30, -036 17 4 0 14 CR33-48 38 5 0 0 C37/CX38/C33/CX34-49C 10 6 1 9
C37/CX38/C33/CX34-25 15 9 0 15 CR33-50, -60 15 5 1 4 C37/CX38/C33/CX34-60 28 7 3 14
C37/CX38/C33/CX34-31 15 16 0 9 C37/CX38/C33/CX34-38 15 4 0 9 C37/CX38/C33/CX34-62C 10 6 3 12
C37/CX38/C33/CX34-36 26 6 0 9 C37/CX38/C33/CX34-43 23 8 2 8 C37/CX38/C33/CX34-62D 14 7 3 12
CBX25UH-030
CBX25UHV-030
CBX25UH-036 19 11 1 5 C37/CX38/C33/CX34-49 11 7 3 9 CBX26UH-060 31 6 3 0

CBX26UH-030 19 11 1 5

CBX27UH-030/036 10 16 1 14

CBX32M-030 7 10 1 3 CBX26UH-042 42 5 0 8 CBX32MV-048 20 6 0 0
CBX32M-036 10 16 1 14 CBX27UH-042, -048 13 5 2 2 CBX32MV-060 17 5 1 4
CBX32MV-024/030 7 10 1 3 CBX32M-048 13 5 2 2 CBX32MV-068 11 8 2 12

-030
CBX32MV-036 10 16 1 14 CBX32MV-048 13 5 2 2 CBX40UHV-048 20 6 0 0

CBX40UHV-030 10 16 1 14 CBX40UHV-042, -048 13 5 2 2 CBX40UHV-060 17 5 1 4
CBX40UHV-036 10 16 1 14 CBA27UHE-042 19 5 0 1 CBA27UHE-060 11 6 1 1
CBA27UHE-030/036 10 11 1 8 CBA27UHE-048 18 6 1 6 CH23-68 27 7 0 13
CH23-41 11 4 0 8 CH23-68 20 9 1 5 CH33-50, -60C 11 4 0 0
CH23-51 11 6 0 14 CH33-43B 7 9 3 2 CH33-62D 19 6 2 4
CH33-31A 16 18 2 8 CH33-43C 22 5 1 0 CR33-50/60 19 6 2 4
CH33-31B 16 18 2 6 CH33-44/48B 18 4 0 0 CR33-60 23 6 1 3
CH33-36A 10 6 0 6 CH33-48C 22 5 1 0 C37/CX38/C33/CX34-62C 10 7 2 14
CH33-36B 6 3 0 0 CH33-49C 16 6 1 6 C37/CX38/C33/CX34-62D 19 7 3 2

The values in this table are most popular match-up pressures; indoor match-up, indoor air quantity, and indoor load will cause the pressures to vary. **Amount of charge required in addition to charge shown on unit nameplate.

Subcool

Heat

(+5ºF)

13 3 0 0

6 6 0 9

17 3 0 15 CBX26UH-036 31 3 0 4 CBX26UH-048 20 10 3 11

9 3 0 8

Additional

Charge

Cool

lbs oz lbs oz lbs oz

(+1ºF)

HP

Indoor Coil or

Size

Air Handler

CH33-36C 10 11 1 5

-030

C37/CX38
C33/CX34-44/-48
CBX25UH-036
CBX25UHV-036

-036

C37/CX38
C33/CX34-44/48

C37/CX38
C33/CX34-50/60
CBX25UH-042
CBX25UHV-042

-042

Subcool

Heat

(+5ºF)

9 21 2 12 C37/CX38/C33/CX34-62D 11 7 1 15

31 3 0 4

40 4 0 15

23 8 2 8 CBX27UH-060 13 7 0 8

42 5 0 8 CBX32M-060 17 5 1 4

Cool

(+1ºF)

Additional

Charge

HP

Indoor Coil or

Size

Air Handler

CH33-50, -60C 10 9 3 4

-042

C37/CX38
C33/CX34-50, -60

CBX25UH-048
CBX25UHV-048

-048

CBX25UH-060
CBX25UHV-060

-060

Subcool

Heat

(+5ºF)

25 8 1 15

15 6 2 5

15 6 2 0

Cool

(+1ºF)

Additional

Charge