Lennox 14HPX-024-230-01, 14HPX-024-230-10, 14HPX-024-230-11, 14HPX-024-230-12, 14HPX-024-230-13 Installation And Service Procedure

INSTALLATION AND SERVICE

PROCEDURE

Service Literature

LOUVERED

NON-LOUVERED

Corp. 0719-L5

Revised April, 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.

IMPORTANT

This unit must be matched with an indoor coil as specified in Lennox Product Specification bulletin. Coils previously charged with HCFC-22 must be flushed.

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.

14HPX

TABLE OF CONTENTS

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

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

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

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

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

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

General Information 9.............................

Operating Gauge Set and Service Valves 9...........

Unit Placement 12.................................

Removing and Installing Louvers 13.................

New or Replacement Line Set 15....................

Brazing Connections 17...........................

Flushing Line Set and Indoor Coil 20................

Installing Indoor Metering Device 21................

Leak Test Line Set and Indoor Coil 22...............

Evacuating Line Set and Indoor Coil 23.............

Electrical Connections 24..........................

System Operation (14HPX-XXX-230-01 through -016)26 Defrost System (14HPX-XXX-230-01 through -016) 26.

System Operation (14HPX-XXX-230-017) 31.........

Defrost System (14HPX-XXX-230-017) 31............

Maintenance 32...................................

Start-Up and Performance Checklist 35..............

Sequence of Operations 36.........................

Servicing Unit Void of Charge 40....................

Start-Up 40.......................................

System Refrigerant 40.............................

®

The Merit HFC-410A refrigerant only. This unit must be installed with an approved indoor air handler or coil. See the Lennox 14HPX Product Specification bulletin (EHB) for approved indoor component matchups.

This outdoor unit is designed for use in systems that use the following refrigerant metering device:

 Check thermal expansion valve (CTXV)

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.

14HPX model is designed for use with

IMPORTANT

Page 1

Model Number Identification

HP X14 024 −

Nominal SEER

Unit Type

HP = Heat Pump

Refrigerant

X = R-410A

Typical Serial Number Identification

Location Code

19 = Saltillo, Mexico

58 = Marshalltown, IA

Year Code

08 = 2008 09 = 2009 10 = 2010

19 09 C

−−

230

Cooling Capacity - Tons 018 = 1.5

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

05716

Month Code

A = January B = February C = March

11

Minor Revision Number

Voltage

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

5 (or 6) Digit Unique Number

Specifications

Unit Outdoor Fan

Model Number

14HPX-018-230-01, 10, -11, 12, -13, -14,

-15

14HPX-018-230-17, -18 76

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

14HPX-024-230-01, -10, -11, -12, -13, -14,

-15

14HPX-024-230-17 76 6 lbs. 4 oz. 3 22

14HPX-024-230-18 76 6 lbs. 4 oz. or 5 lbs. 14 oz.

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

14HPX-030-230-01, -10, -11, -13, -14 76 7 lbs. 2 oz. 3 18

14HPX-030-230-17 76 6 lbs. 0 oz. 3 22

14HPX-030-230-18 76 6 lbs. 0 oz. or 5 lbs. 10 oz.

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

1

(dB)

76 8 lbs. 4 oz. 3 18

1

(dB)

76 8 lbs. 0 oz. 3 18

1

(dB)

Factory Refrigerant

6 lbs. 11 oz. or 5 lbs.

Unit Outdoor Fan

Factory Refrigerant

Unit Outdoor Fan

Factory Refrigerant

Charge

11 oz.

Charge

2

3

2

Number of Blades Diameter - inches.

3 22

Number of Blades Diameter - inches.

3

3 22

Number of Blades Diameter - inches.

3 22

Page 2

Unit Outdoor Fan

Model Number

Sound Rating Number

(dB)

1

Factory Refrigerant

Charge

2

Number of Blades Diameter - inches.

14HPX-036-230-01, -10, -11, -12 76 9 lbs. 12 oz. 4 26

14HPX-036-230-17 76 9 lbs. 12 oz. 3 22

14HPX-036-230-18 76 9 lbs. 12 oz. or 9 lbs. 6 oz.

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.

3

3 22

Unit Outdoor Fan

Model Number

Sound Rating

Number (dB)

Factory Refrigerant Charge

1

2

Number of Blades Diameter - inches.

14HPX-042-230-01, -10, -11, -12 76 12 lbs. 7 oz. 4 26

14HPX-042-230-17 76 11 lbs. 14 oz. 4 26

14HPX-042-230-18 76 11 lbs. 14 oz. 4 26

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.

Unit Outdoor Fan

Model Number

Sound Rating

Number (dB)

Factory Refrigerant Charge

1

2

Number of Blades Diameter - inches.

14HPX-048-230-01, -10, -11, -12 76 12 lbs. 10 oz. 4 26

14HPX-048-230-17 76 10 lbs. 07 oz. 4 26

14HPX-048-230-18 76 10 lbs. 07 oz. 4 26

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.

Unit Outdoor Fan

Model Number

Sound Rating Number

(dB)

1

Factory Refrigerant Charge

2

Number of Blades Diameter - inches.

14HPX-060-230-01, -10, -11, -12 76 16 lbs. 0 oz. 4 26

14HPX-060-230-17 76 12 lbs. 11 oz. 4 26

14HPX-060-230-18 76 12 lbs. 11 oz. 4 26

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.

Page 3

14HPX SERIES

Electrical Data

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

Maximum

1.0 20 12.3 8.97 48.0 1/5 1075 1.1 1.4

14HPX-018-230-01

2.0. 3,0 &

4.0

20 11.9 8.97 48.0 1/10 1075 .70 1.4

14HPX-018-230-10 1.0 20 11.9 8.97 48.0 1/10 1075 .70 1.4

14HPX-018-230-11 1.0 20 11.9 8.97 48.0 1/10 1075 .70 1.4

14HPX-018-230-12 1.0 20 11.9 10.18 48.0 1/10 1075 .70 1.4

14HPX-018-230-13 1.0 20 11.9 10.18 48.0 1/10 1075 .70 1.4

14HPX-018-230-14 1.0 20 11.9 10.18 48.0 1/10 1075 .70 1.4

14HPX-018-230-15 1.0 20 11.9 10.18 48.0 1/10 1075 .70 1.4

14HPX-018-230-17

14HPX-018-230-18

1

HACR type circuit breaker or fuse.

2

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

1.0, 2.0 &

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 12.2 9.0 48.0 1/6 825 1.0 1.87

Rated

Load

Amps

2

(RLA)

Locked

Rotor Amps

(LRA)

Motor HP

Nominal

RPM

Full Load

Amps (FLA)

Locked

Rotor Amps

(LRA)

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

14HPX-024-230-01

1.0 30 17.9 13.46 58.0 1/5 1075 1.1 1.4

2.0 & 3.0 30 17.5 13.46 58.0 1/10 1075 .70 1.4

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)

14HPX-024-230-10 1.0 30 17.5 13.46 58.0 1/10 1075 .70 1.4

14HPX-024-230-11 1.0 30 17.5 13.46 58.0 1/10 1075 .70 1.4

14HPX-024-230-12 1.0 30 17.5 13.46 58.0 1/10 1075 .70 1.4

14HPX-024-230-13 1.0 30 17.5 13.46 58.0 1/10 1075 .70 1.4

14HPX-024-230-14 1.0 30 17.5 13.46 58.0 1/10 1075 .70 1.4

14HPX-024-230-15 1.0 30 17.5 13.46 58.0 1/10 1075 .70 1.4

14HPX-024-230-17

14HPX-024-230-18

1

HACR type circuit breaker or fuse.

2

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

1.0, 2.0,

3.0 & 4.0

30 17.9 13.44 58.0 1/6 825 1.1 1.87

1.0 30 17.9 13.44 58.0 1/6 825 1.1 1.87

2.0 30 17.9 17.9 58.0 1/6 825 1.1 1.87

Page 4

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)

1.0 30 17.2 12.9 64.0 1/5 825 1.1 1.4

14HPX-030-230-01

2.0, 3.0,

4.0 & 5.0

30 17.0 13.1 64.0 1/10 1075 .70 1.3

14HPX-030-230-10 1.0 30 17.0 13.1 64.0 1/10 1075 .70 1.3

14HPX-030-230-11 1.0 30 17.0 13.1 64.0 1/10 1075 .70 1.3

14HPX-030-230-13 1.0 30 17.0 13.1 64.0 1/10 1075 .70 1.3

14HPX-030-230-14 1.0 30 17.0 13.1 64.0 1/10 1075 .70 1.3

14HPX-030-230-17 1.0 25 17.1 12.8 64.0 1/6 825 1.1 1.9

14HPX-030-230-18 1.0 25 17.1 12.8 64.0 1/6 825 1.1 1.9

1

HACR type circuit breaker or fuse.

2

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

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

1.0, 2.0,

14HPX-036-230-01

3.0, 4.0 &

5.0

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)

14HPX-036-230-10 1.0 30 19.4 14.1 77.0 1/3 825 1.8 2.9

14HPX-036-230-11 1.0 30 19.4 14.1 77.0 1/3 825 1.8 2.9

14HPX-036-230-12 1.0 30 19.4 14.1 77.0 1/3 825 1.8 2.9

14HPX-036-230-17 1.0 & 2.0 30 18.7 14.08 77.0 1/6 825 1.1 1.87

14HPX-036-230-18

1

HACR type circuit breaker or fuse.

2

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

1.0 30 18.7 14.08 77.0 1/6 825 1.1 1.87

2.0 30 18.7 14.1 77.0 1/6 825 1.1 1.87

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

14HPX-042-230-01

1.0 40 23.9 17.69 07.0 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)

14HPX-042-230-10 1.0 40 24.2 17.94 112.0 1/3 825 1.8 2.9

14HPX-042-230-11 1.0 40 24.2 17.94 112.0 1/3 825 1.8 2.9

14HPX-042-230-12 1.0 40 24.2 17.94 112.0 1/3 825 1.8 2.9

14HPX-042-230-17

14HPX-042-230-18

1

HACR type circuit breaker or fuse.

2

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

1.0, 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

14HPX SERIES

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

14HPX-048-230-01

1.0, 2.0,

3.0 & 4.0

Maximum

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

50 29.0 21.79 117.0 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)

14HPX-048-230-10 1.0 50 29.0 21.79 117.0 1/3 825 1.8 2.9

14HPX-048-230-11 1.0 50 29.0 21.79 117.0 1/3 825 1.8 2.9

14HPX-048-230-12 1.0 50 29.0 21.79 117.0 1/3 825 1.8 2.9

14HPX-048-230-17

14HPX-048-230-18

1

HACR type circuit breaker or fuse.

2

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

1.0, 2.0 &

3.0

50 29.0 21.76 117.0 1/3 825 1.8 2.9

1.0 50 29.0 21.76 117.0 1/3 825 1.8 2.9

2.0 50 29.0 21.8 117.0 1/3 825 1.8 2.9

208/230V-60 Hz-1 Ph

Unit Compressor Condenser Fan

Model Number Label Rev.

14HPX-060-230-01

1.0, 2.0 &

3.0

Maximum

Over-

current

Protection

(amps)

1

Minimum

Circuity

Ampacity

60 34.8 26.41 134.0 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)

14HPX-060-230-10 1.0 60 34.8 26.41 134.0 1/3 825 1.8 2.9

14HPX-060-230-11 1.0 60 34.8 26.41 134.0 1/3 825 1.8 2.9

14HPX-060-230-12 1.0 60 34.8 26.41 134.0 1/3 825 1.8 2.9

14HPX-060-230-17

1.0, 2.0,

3.0 & 4.0

50 29.4 22.10 125.0 1/3 825 1.8 2.9

14HPX-060-230-18 1.0 50 29.4 22.10 125.0 1/3 825 1.8 2.9

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

OUTDOOR

COIL FAN

A

DISCHARGE AIR

C

COMPRESSOR

B

SUCTION AND LIQUID

LINE CONNECTION

OPTIONAL UNIT

STANDOFF KIT (4)

SIDE VIEW

(FIELD INSTALLED)

Table 1. Unit Dimensions (14HPX-XXX-230-01 through -012)

Model Number A B C

14HPX-018-230 24-1/4 (616) 29-1/4 (743) 28-1/2 (724)

14HPX-024-230 24-1/4 (616) 29-1/4 (743) 28-1/2 (724)

14HPX-030-230 24-1/4 (616) 33-1/4 (845) 32-1/2 (826)

14HPX-036-230 32-1/4 (819) 29-1/4 (743) 28-1/2 (724)

14HPX-042-230 32-1/4 (819) 37-1/4 (946) 36-1/2 (927)

14HPX-048-230 32‐1/4 (819) 37-1/4 (946) 36-1/2 (927)

14HPX-060-230 32‐1/4 (819) 43-1/4 (1099) 42-1/4 (1073)

Table 2. Unit Dimensions (14HPX-XXX-230-017)

SIDE VIEW

Model Number A B C

14HPX-018-230 28-1/4 (718) 37-1/4 (946) 36-1/2 (927)

14HPX-024-230 28-1/4 (718) 37-1/4 (946) 36-1/2 (927)

14HPX-030-230 28-1/4 (718) 37-1/4 (946) 36-1/2 (927)

14HPX-036-230 28-1/4 (718) 33-1/4 (845) 32-1/2 (826)

14HPX-042-230 32-1/4 (819) 37-1/4 (946) 36-1/2 (927)

14HPX-048-230 32‐1/4 (819) 37-1/4 (946) 36-1/2 (927)

14HPX-060-230 32‐1/4 (819) 43-1/4 (1099) 42-1/4 (1073)

Page 7

14HPX SERIES

Typical Unit Parts Arrangement

CAPACITOR

GROUND

LUG

CUTOUT FOR HIGH VOLTAGE CONDUIT

CONTROL

CONTACTOR

DEFROST CONTROL BOARD

CONTROL WIRE LOOP

CHECK EXPANSION

NOTE — PLUMBING LAYOUT AND COMPRESSOR TYPE MAY VARY SLIGHTLY BETWEEN MODEL SIZES.

COMPRESSOR

HARNESS

DEFROST

THERMOSTAT

VALV E

EQUALIZER LINE

BI-FLOW FILTER

LIQUID LINE SERVICE

DRIER

TRUE SUCTION

PORT

HIGH PRESSURE

SWITCH (S4)

VALV E

COMPRESS0R

DISCHARGE LINE

MUFFLER

LOW PRESSURE SWITCH

REVERSING VALVE SO LENOID

VAPOR LINE SERVICE VALVE

REVERSING VALV E

Figure 1. Typical Unit Parts Arrangement (14HPX-XXX-230-01 through -012)

Page 8

DUAL RUN

CAPACITOR

(C12)

CONTACTOR

(K-1)

GROUND

LUG

DEFROST

CONTROL

(CMC1)

CUTOUT FOR

HIGH VOLTAGE

CONDUIT

CONTROL

PROTECTION SWITCH

EXTERNAL SWITCH)

CONTROL WIRE LOOP

THERMAL

(S173) (ONLY ON

UNITS USING

SWITCH

COVER

COMPRESSOR HARNESS

DEFROST THERMOSTAT

EXPANSION VALVE

EQUALIZER LINE

BI-FLOW FILTER

(S6)

CHECK /

DRIER

TRUE SUCTION

PORT

COMPRESS0R

DISCHARGE LINE

MUFFLER

LOW PRESSURE SWITCH (S87)

REVERSING VALVE (L1)

CRANKCASE CASE HEATER (HR1) (-036,

-042, -048, -060 UNITS ONLY)

CRANKCASE HEATER THERMOSTAT

(S40) (-036, -042, -048, -060 UNITS ONLY)

HIGH PRESSURE SWITCH (S4)

NOTE — PLUMBING LAYOUT AND COMPRESSOR TYPE MAY VARY SLIGHTLY BETWEEN MODEL SIZES.

Figure 2. Typical Unit Parts Arrangement (14HPX-XXX-230-017)

General Information

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

WARNING

This product contains a chemical known to the State of California to cause cancer, birth defects, or other repro ductive harm.

REVERSING VALVE SOLENOID

VAPOR LINE

LIQUID LINE SERVICE

VALV E

VAPOR LINE SERVICE VALVE (BALL-TYPE -060 ONLY)

SERVICE VALVE (ANGLE-TYPE - ALL OTHER SIZES)

Operating Gauge Set and Service Valves

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 pro tective clothing.

Page 9

14HPX SERIES

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.

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.

IMPORTANT

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

When servicing or repairing HVAC components, ensure the fasteners are appropriately tightened. Table 3 provides torque values for fasteners.

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 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 wrenched to open. To open valve, roate 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

CORE

CAP

TO OUTDOOR

UNIT

BALL (SHOWN CLOSED)

VALV E STEM

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 tight

en 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

14HPX SERIES

See

NOTES

See NOTES

See

NOTES

CONTROL

BOX

NOTES:

Service clearance of 30 in. (762 mm) 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. (914 mm)

Clearance to one of the remaining two sides may be 12 in. (305 mm) and the final side may be 6 in. (152 mm).

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

48 in. (1219 mm) 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 4. Installation Clearances

DETAIL A

INSTALL UNIT AWAY

FROM WINDOWS

TWO 90 ELBOWS INSTALLED IN LINE SET

WILL REDUCE LINE SET VIBRATION

Figure 5. Placement, and Slab Mounting

Unit Placement

See Unit Dimensions on page 4 for sizing mounting slab, platforms or supports. Refer to figure 4 for mandatory installation clearance requirements.

CAUTION

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

DETAIL B

INSTALL UNIT LEVEL OR, IF ON A SLOPE, MAINTAIN SLOPE TOLERANCE OF 2 DEGREES (OR 2 INCHES PER 5 FEET [50 MM PER 1.5 M]) AWAY FROM BUILDING STRUCTURE.

BUILDING

STRUCTURE

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 5, detail A.

DISCHARGE AIR

MOUNTING SLAB

GROUND LEVEL

Page 12

PLACING UNIT ON SLAB

When installing unit at grade level, the top of the slab should be high enough above grade so that water from higher

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.

ground will not collect around the unit. The slab should have a slope tolerance as described in figure 5, detail B.

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

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.

Removing and Installing Louvered Panels – Initial Builds

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.

NOTICE

When removing the unit panels. Remove panel A first, then B, C and final ly D. When reinstalling panels, reverse that order starting with panel D, C,

B and finally A.

REMOVAL

STEP 1

TO REMOVE PANEL, REMOVE MOUNTING SCREWS SECURING PANEL TO THE UNIT.

STEP 1

STARTING WITH PANEL D,

PANEL A

STEP 2

SLIGHTLY LIFT PANEL A IN ORDER TO CLEAR SIDE LIPS OF PANEL FROM BASE OF UNIT.

STEP 3

TILT PANEL OUT SLIGHTLY AND PULL DOWNWARD TO REMOVE.

REPEAT STEPS 1, 2 AND 3 TO REMOVE PANELS B, C AND FINALLY D.

PANEL A

INSERT PANEL UNDER UNIT TOP CAP LIP AND LIFT SLIGHTLY TO CLEAR SIDE LIP OF PANEL FROM BASE.

STEP 2

MOVE PANEL IN TOWARDS UNIT. ALIGN LEFT/RIGHT SIDE LIPS OF PANEL WITH GROOVE INSERTS ALONG LEFT/RIGHT SIDE OF UNIT.

PANEL B

WARNING

PANEL A

INSTALLATION

STEP 3

SECURE PANEL, WITH MOUNTING SCREWS.

REPEAT STEPS 1 AND 2 TO INSTALL PANELS C, B AND FINALLY A.

PANEL C

PANEL D

TOP CAP

SIDE

GROOVE

BASE

PANEL D

Figure 6. Louvered Panels

Page 13

14HPX SERIES

Removing and Installing Louvered Panels – Later Builds

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.

STEP 1

TO REMOVE PANEL, REMOVE MOUNTING SCREWS SECURING PANEL TO THE UNIT.

STEP 2

SLIGHTLY LIFT PANEL IN ORDER TO CLEAR SIDE LIPS OF PANEL FROM BASE OF UNIT.

STEP 3

TILT PANEL OUT SLIGHTLY AND PULL DOWNWARD TO REMOVE.

REMOVAL

PANEL CENTER

CORNER

POST

PANEL LEFT

STEP 1

INSERT PANEL UNDER UNIT TOP CAP LIP AND LIFT SLIGHTLY TO CLEAR SIDE LIP OF PANEL FROM BASE.

STEP 2

MOVE PANEL IN TOWARDS UNIT. ALIGN LEFT/RIGHT SIDE LIPS OF PANEL WITH GROOVE INSERTS ALONG LEFT/RIGHT SIDE OF UNIT.

STEP 3

SECURE PANEL, WITH MOUNTING SCREWS.

CORNER POST

PANEL CENTER

CORNER

POST

PANEL RIGHT

TOP CAP

GROOVE

PANEL INSTALLATION

Figure 7. Louvered Panels

Page 14

SIDE

BASE

New or Replacement Line Set

This section provides information on new installation or replacement of existing line set. If a new or replacement line set is not required, then proceed to Brazing Connections on page .

If refrigerant lines are routed through a wall, 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.

Also, consider the following when placing and installing a high-efficiency air conditioner:

REFRIGERANT LINE SET

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

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 for every five pounds of refrigerant.

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

MATCHING WITH NEW OR EXISTING INDOOR COIL AND LINE SET

The RFC1-metering line consisted of a small bore copper line that ran from condenser to evaporator coil. Refrigerant was metered into the evaporator by utilizing temperature/pressure evaporation effects on refrigerant in the small RFC line. The length and bore of the RFC line corresponded to the size of cooling unit.

If the 14HPX is being used with either a new or existing indoor coil which is equipped with a liquid line which served as a metering device (RFCI), the liquid line must be replaced prior to the installation of the 14HPX unit. Typically a liquid line used to meter flow is 1/4” in diameter and copper.

LINE SET ISOLATION

Table 4. Refrigerant Line Set (MM)

Field

Model

-018

-024

-030

-036

-042

-048

-060

NOTE — Some applications may require a field provided 7/8” to 1-1/8” adapter

Connections

Liquid Line

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)

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

NOTE — When installing refrigerant lines longer than 50 feet, contact Lennox Technical Support Product Applications for assistance or Lennox piping manual. To obtain the correct information from Lennox, be sure to communicate the following points:

 Model (14HPX) and size of unit (e.g. -060).

 Line set diameters for the unit being installed as listed

in table 4 and total length of installation.

 Number of elbows and if there is a rise or drop of the

piping.

IMPORTANT

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

be added, it must be a Polyol ester oil.

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

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.

Page 15

14HPX SERIES

LINE SET

INSTALLATION

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

AUTOMOTIVE

MUFFLER‐TYPE HANGER

IMPORTANT — Refrigerant lines must not contact structure.

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.

IMPORTANT — Refrigerant lines must not contact wall

OUTSIDE WALL

VAPOR LINE

LIQUID LINE

WALL STUD

STRAP LIQUID LINE TO VAPOR LINE

LIQUID LINE

NON-CORROSIVE

METAL SLEEVE

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

WIRE TIE

INSIDE WALL

CAULK

LIQUID LINE

STRAP

NON-CORROSIVE METAL SLEEVE

WIRE TIE

WOOD BLOCK

WIRE TIE

STRAP

WOOD BLOCK

BETWEEN STUDS

SLEEVE

VAPOR LINE WRAPPED

WITH ARMAFLEX

OUTSIDE

WALL

PVC

PIPE

FIBERGLASS

INSULATION

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

FLOOR JOIST OR

ROOF RAFTER

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.

Figure 8. Line Set Installation

Page 16

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.

IMPORTANT

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.

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 re sult 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 17

14HPX 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

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 18

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. Water

6

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 may result if you do not wrap a water

saturated cloth around both liquid and suction line service valve bodies and copper tube stub while brazing 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 19

14HPX 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 temporarily 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 CYLINDER CONTAINS CLEAN HCFC22* 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 set and indoor unit coil.

B

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 the system down to 0.

D Close the valve on the inverted HCFC-22 drum and the gauge

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

*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. Removing Metering Device and Flushing

Page 20

Installing Indoor Metering Device

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

See the Lennox 14HPX Product Specification bulletin 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

EXPANSION

VALV E

®

ASSEMBLY WITH

LINE

TEFLON

RING

SENSING

LIQUID LINE

BRASS NUT

LIQUID LINE

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

EQUALIZER LINE INSTALLATION

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

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

®

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

FLARE NUT

COPPER FLARE SEAL BONNET

MALE BRASS EQUALIZER LINE FITTING

VAPOR LINE

12

BULB

NOTE — NEVER MOUNT ON BOTTOM OF LINE.

Figure 12. Installing Indoor Expansion Valve

Page 21

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

14HPX 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 22

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

GAUGE SET

TO VAPOR

SERVICE VALVE

TO LIQUID LINE SERVICE VALVE

LOW

MANIFOLD

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

1/6 TURN

12

7

6

HIGH

1

2

3

4

5

Figure 14. Evacuating System

Page 23

14HPX 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 SERVICE DISCONNECT SWITCH

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.

MAIN FUSE BOX/

BREAKER PANEL

SERVICE

DISCONNECT

SWITCH

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

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.

INSTALL THERMOSTAT

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

THERMOSTAT

5 FEET

(1.5M)

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

Page 24

ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING

HIGH VOLTAGE / GROUND WIRES

Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control panel. Connect conduit to the control panel using a proper conduit fitting.

CONTROL WIRING

Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated.

A Run 24VAC control wires through hole with grommet.

B Make 24VAC thermostat wire connections to CMC1.

NOTE — Do not bundle any excess 24VAC control wires inside control panel.

NOTE — For proper voltages, select thermostat wire (control wires) gauge per table below..

WIRE RUN LENGTH AWG# INSULATION TYPE

LESS THAN 100' (30 METERS) 18 TEMPERATURE RATING

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

HIGH VOLTAGE FIELD WIRING

LOW VOLTAGE FIELD WIRING

FACTORY WIRING

SINGLE PHASE

DEFROST CONTROL

Thermostat

BOARD (CMC1)

TYPICAL CONTROL WIRING

Low Voltage Wiring

Indoor Unit

R

C

W1

G

O

Y1

power

common

1st. stage aux. heat

indoor blower

reversing valve

compressor

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

R

C

W1

W2

W3

G

NOTE — Wire tie provides low voltage wire strain relief and to maintain separation of field installed low and high voltage circuits.

Outdoor Unit

power

common

1st. stage aux. heat

Low Voltage Wiring (with Auxiliary Heat)

Thermostat Indoor Unit Outdoor Unit

R

C

emergency heat

E

power

common

R

C

emer.

heat

relay

power

common

R

C

W1

O

Y1

R

C

HIGH VOLTAGE CONNECTIONS

(CONTACTOR)

GROUND

CUTOUT FOR HIGH

VOLTAGE CONDUIT

A

GROMMET AND WIRE TIE

FOR CONTROL WIRES

B

CONTROL WIRE CONNECTIONS

Page 25

W1

1st. stage aux. heat

indoor blower

G

reversing valve

O

compressor

Y1

(SOME CONNECTIONS MAY NOT APPLY. REFER TO

SPECIFIC THERMOSTAT AND INDOOR UNIT.)

W1

1st. stage aux. heat

W2

W3

G

outdoor t'stat

W1

O

Y1

14HPX SERIES

System Operation (14HPX-XXX-230-01 through -012)

IMPORTANT

Some scroll compressors 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.

The outdoor unit and indoor blower cycle on demand from the room thermostat. If the thermostat blower switch is in the

ON position, the indoor blower operates continuously.

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.

LOW PRESSURE SWITCH (OPTIONAL)

The 14HPX may be equipped with an optional 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. This switch, which is ignored during defrost operation, closes at pressures at or above 55 psig and opens at 25 psig. It is not adjustable.

HIGH PRESSURE SWITCH

The 14HPX is equipped with an 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. The switch is normally closed and is permanently adjusted to trip (open) at 590 + 10 psig (4412 + 69 kPa).

NOTE - A Schrader core is under the pressure switches.

Defrost System (14HPX-XXX-230-01 through -016)

DEFROST SYSTEM DESCRIPTION

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 15.

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.

Page 26

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 6.

TEST PINS

DEFROST

TERMINATION

PIN SETTINGS

SENSOR

PLUG IN

(COIL & AM

BIENT

SENSORS)

DELAY

PINS

REVERSING

VALV E

PRESSURE

SWITCH CIR

CUIT CONNEC

TIONS

LOW AMBIENT THERMOSTAT PINS

DIAGNOSTIC LEDS

24V TERMINAL STRIP CONNECTIONS

Note - Compo nent Locations Vary by Board Manufacturer.

Figure 15. Defrost Control Board

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.

(OPTIONAL) 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. 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.

DEFROST BOARD PRESSURE SWITCH SETTINGS High Pressure (auto reset) - trip at 590 psig; reset at 418. Low Pressure (auto reset) - trip at 25 psig; reset at 40.

5-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 5-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.

AMBIENT SENSOR

Figure 16. Sensor Locations

DEFROST SYSTEM SENSORS

Sensors connect to the defrost board through a field‐replaceable harness assembly that plugs into the board. Through the sensors, the board detects outdoor ambient, coil, and discharge temperature fault conditions. As the detected temperature changes, the resistance across the sensor changes. Figure 17 shows how the resistance varies as the temperature changes for both type of sensors. Sensor resistance values can be checked by ohming across pins shown in table 5.

NOTE - When checking the ohms across a sensor, be aware that a sensor showing a resistance value that is not within the range shown in table 5, may be performing as designed. However, if a shorted or open circuit is detected, then the sensor may be faulty and the sensor harness will needs to be replaced.

Table 5. Sensor Temp. / Resistance Range

Temperature

Sensor

Outdoor (Ambient)

Coil -35 (-37) to 120

Discharge (if applicable)

Note: Sensor resistance decreases as sensed temperature increases (see figure 17).

Range °F (°C)

-35 (-37) to 120 (48)

(48)

24 (-4) to 350 (176) 41,000 to 103 1 & 2

Resistance values range (ohms)

280,000 to 3750 3 & 4

280,000 to 3750 5 & 6

Pins/Wire Color

(Black)

(Brown)

(Yellow)

Coil Sensor—The coil temperature sensor (shown in figure

16) 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

Page 27

14HPX SERIES

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.

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.

Ambient and Coil Sensor

100

TEMPERATURE (ºF)

Ambient Sensor—The ambient sensor (shown in figure

16) 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.

NOTE - Within a single room thermostat demand, if 5-strikes occur, the board will lockout the unit. Defrost board 24 volt power “R” must be cycled “OFF” or the “TEST” pins on board must be shorted between 1 to 2 seconds to reset the board.

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).

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.

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

OPERATIONAL DESCRIPTION

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.

5750

90

80

70

60

50

40

30

20

10

7450

9275

11775

15425

19975

26200

34375

46275

62700

0

10000 30000 50000 70000 90000

RESISTANCE (OHMS)

85300

Figure 17. Temperature/Resistance Chart

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.

DETAILED 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 6 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.

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 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.

Test Mode — A TEST option is provided for troubleshooting. See figure 18 for this function.

Page 28

TEST

Placing the jumper on the field test pins 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 jumpered 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

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 fault 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.

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.

Figure 18. Test Mode

Page 29

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.

14HPX SERIES

DEFROST BOARD DIAGNOSTICS

See table 6 to determine defrost board operational conditions and to diagnose cause and solution to problems.

Table 6. Defrost Control Board Diagnostic LEDs

DS2 Green

OFF OFF Power problem No power (24V) to board terminals R &

DS1 Red

Condition/Code Possible Cause(s) Solution

1

Check control transformer power (24V).

C or board failure.

2

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

Simultaneous SLOW Flash

Alternating SLOW Flash

Simultaneous FAST Flash

Alternating FAST Flash

Normal operation Unit operating normally or in standby

None required.

mode.

5-minute anti-short cycle delay

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

None required (Jumper TEST pins to override)

Ambient Sensor Problem Sensor being detected open or shorted or out of temperature range. Board will revert to time/tem

perature defrost operation. (System will still heat or cool).

Coil Sensor Problem 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).

ON ON Circuit Board Failure Indicates that board has internal component failure. Cycle 24 volt power to board. If code does not

clear, replace board.

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

OFF SLOW

Flash

OFF ON

SLOW

OFF High Pressure Fault

Flash

Low Pressure Fault

Low Pressure LOCKOUT

1

Restricted air flow over indoor or out door 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.

1

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 & subcooling 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

ON OFF

SLOW

ON Discharge Line Temperature

Flash

FAST

ON Discharge Line Temperature

Flash

OFF Fast

Flash

Fast

OFF Discharge Sensor

Flash

High Pressure LOCKOUT

This code detects shorted sensor or high discharge temperatures. If the discharge line temperature

Fault

exceeds a temperature of 300ºF (148ºC) during compressor operation, the board will de-energize the compressor contactor output (and the defrost output if active). The compressor will remain off

LOCKOUT

until the discharge temperature has dropped below 225ºF (107ºC).

Discharge Sensor Fault The board detects open sensor or out of temperature sensor range. This fault is detected by allow

ing the unit to run for 90 seconds before checking sensor resistance. If the sensor resistance is not within range after 90 seconds, the board will count one fault. After 5 faults, the board will lockout.

LOCKOUT

leaks or errors in pressure and temperature measure ments.

Page 30

System Operation (14HPX-XXX-230-017)

UNIT COMPONENTS

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.

The outdoor unit and indoor blower cycle on demand from the room thermostat. If the thermostat blower switch is in the

ON position, the indoor blower operates continuously.

Bi-Flow Liquid line 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.

Low Pressure Switch (S87)

The 14HPX is equipped with 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. This switch, which is ignored during defrost operation, closes at pressures at or above 40 + 5 psig (276 + 34 kPa) and opens at 25 + 5 psig (172 + 34 kPa). It is not adjustable.

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

High Pressure Switch (S4)

The 14HPX is equipped with an 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. The switch is normally closed and is permanently adjusted to trip (open) at 590 + 15 psig (4068 + 103 kPa).

NOTE -— A Schrader core is under the pressure switches.

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).

Crankcase Heater (HR1) and Thermostat Switch (S40)

(-60 model only)

All models sizes are equipped with a belly band type crankcase heater. HR1 prevents liquid from accumulating in the compressor. The HR1 is controlled by a single pole, single throw thermostat switch (S40) located on the liquid line (see figure 2 for location). On all other units, the heater is on when there is no compressor operation.

Page 31

Thermal Protection Switch (S173) — Compressor

Mounted

Some 14HPX 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.

Defrost System (14HPX-XXX-230-017)

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

DEFROST CONTROL (CMC1)

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

DEFROST TIMING

PINS (P1)

TEST

PINS

DIAGNOSTIC

COMPRESSOR

DELAY PINS

REVERSING

VALV E

S87

LOW PRESSURE

SWITCH

DEFROST

THERMOSTAT (S6)

S4

HIGH PRESSURE

SWITCH

Figure 19. Defrost Control (CMC1)

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 19). 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

SERVICE LIGHT CONNECTIONS

14HPX SERIES

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-TEST)

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.

Diagnostic LEDs (DS1 and DS2)

The defrost control uses two LEDs for diagnostics. The LEDs flash a specific sequence according to the diagnosis. See table 7.

Table 7. Defrost Control Diagnostic LEDs

NOTE — The defrost control must have a thermostat demand for the bypass function.

During a single thermostat cycle, the defrost control will lock out the unit after the fifth time that the circuit is interrupted by any pressure switch that is wired to the defrost control. In addition, the diagnostic LEDs will indicate a pressure switch lockout after the fifth occurrence of an open pressure switch (see table 7). The unit will remain locked out until power is broken then remade to the control or until the jumper is applied to the TEST pins for 0.5 seconds.

NOTE — The defrost control ignores input from the low pressure switch terminals during the TEST mode, during the defrost cycle, during the 90-second start-up period, and for the first 90 seconds each time the reversing valve switches heat/cool modes. If the TEST pins are jumpered

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

Service Light Connection

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

IMPORTANT

After testing has been completed, properly reposition test jumper across desired timing pins.

Maintenance

DEALER

WARNING

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies.

DS2 Green DS1 Red Condition

OFF OFF Power problem

Simultaneous Slow Flash Normal operation

Alternating Slow Flash 5-minute anti-short cycle delay

Fault and Lockout Codes

OFF Slow Flash Low Pressure Fault

OFF ON Low Pressure Lockout

Slow Flash OFF High Pressure Fault

ON OFF High Pressure Lockout

Shaded entries apply to demand defrost controls only.

Time Delay

The timed-off delay is five minutes long. The delay helps 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.

Page 32

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.

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 outdoor coil (may be flushed with a water hose). Ensure power is off before cleaning.

2. Outdoor unit fan motor is pre-lubricated and sealed. No further lubrication is needed.

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

4. Check all wiring for loose connections.

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

6. Check amp draw on outdoor fan motor.

Motor Nameplate:_________ Actual:__________.

7. Inspect drain holes in coil compartment base and clean if necessary.

NOTE ‐ If insufficient heating or cooling occurs, the unit should be gauged and refrigerant charge should be 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. Lennox blower motors are prelubricated and permanently sealed. No more lubrication is needed.

3. 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.

4. Belt Drive Blowers - Check belt for wear and proper tension.

5. Check all wiring for loose connections.

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

7. Check amp draw on blower motor.

Motor Nameplate:_________ Actual:__________.

Indoor Coil

1. Clean coil if necessary.

2. Check connecting lines, joints and coil for evidence of oil leaks.

3. Check condensate line and clean if necessary.

HOMEOWNER

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

IMPORTANT

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

Outdoor Coil

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

 Please contact your dealer to schedule proper

inspection and maintenance for your equipment.

 Make sure no obstructions restrict airflow to the outdoor

unit.

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

cause the unit to work harder and use more energy.

 Keep shrubbery trimmed away from the unit and

periodically check for debris which collects around the unit.

Routine Maintenance

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

1. Air Filter — Ask your Lennox dealer to show you where

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

2. Disposable Filter — Disposable filters should be

replaced with a filter of the same type and size.

NOTE — If you are unsure about the filter required for your system, call your Lennox dealer for assistance.

3. Reusable Filter — Many indoor units are equipped with

reusable foam filters. Clean foam filters with a mild soap and water solution; rinse thoroughly; allow filter to dry completely before returning it to the unit or grille.

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

4. Electronic Air Cleaner — Some systems are equipped

with an electronic air cleaner, designed to remove airborne particles from the air passing through the cleaner. If your system is so equipped, ask your dealer for maintenance instructions.

5. Indoor Unit — The indoor unit's evaporator coil is

equipped with a drain pan to collect condensate formed as your system removes humidity from the inside air. Have your dealer show you the location of the drain line and how to check for obstructions. (This would also apply to an auxiliary drain, if installed.)

Thermostat Operation

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

Page 33

14HPX SERIES

Heat Pump Operation

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

 Heat pumps satisfy heating demand by delivering large

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

 Do not be alarmed if you notice frost on the outdoor coil

in the winter months. Frost develops on the outdoor coil during the heating cycle when temperatures are below 45F (7C). An electronic control activates a defrost cycle lasting 5 to 15 minutes at preset intervals to clear the outdoor coil of the frost.

 During the defrost cycle, you may notice steam rising

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

Extended Power Outage

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

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

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

Preservice Check

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

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

model number and have it handy before calling.

Accessories

For update-to-date information, see any of the following publications:

 Lennox 14HPX Product Specification bulletin  Lennox Product Catalog  Lennox Price Book

Page 34

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 Outdoor Fan

Maximum Fuse or Circuit Breaker

Electrical Connections Tight?  Indoor Filter clean?  Supply Voltage (Unit Off)

Indoor Blower RPM S.P. Drop Over Indoor (Dry) Outdoor Coil Entering Air Temp.

Discharge Pressure Vapor Pressure Refrigerant Charge Checked? 

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

Service Valves: Fully Opened?  Caps Tight?  Thermostat

Voltage With Compressor Operating Calibrated?  Properly Set?  Level? 

Page 35

14HPX SERIES

Sequence of Operations

3

14HPX UNIT DIAGRAM

6

4

1

5

2

Figure 20. Typical Unit Wiring Diagram (14HPX-XXX-230-01 through -012)

Page 36

Figure 21. Typical Unit Wiring Diagram (14HPX-XXX-230-017)

Page 37

14HPX SERIES

HIGH PRESSURE SWITCH (S4) — LIQUID LINE

LOW PRESSURE SWITCH (S87) — SUCTION LINE

REVERSING VALVE (L1)

DEFROST THERMOSTAT (S6)

CRANKCASE THERMOSTAT (S40) - -036, -042, 048, AND

-060 UNITS ONLY

Figure 22. Typical Unit Factory Wiring (14HPX-XXX-230-017)

Page 38

THERMAL SWITCH (S173)

HIGH PRESSURE SWITCH (S4) — LIQUID LINE

LOW PRESSURE SWITCH (S87) — SUCTION LINE

GROUND WIRE

(GREEN)

CRANKCASE HEATER

(HR1) (-060 ONLY)

Figure 23. Typical Unit Factory Wiring — Compressor with Thermal Protection Switch (S173)

CRANKCASE THERMOSTAT (S40) - -036, -042, 048, AND

-060 UNITS ONLY

(14HPX-XXX-230-017)

Page 39

REVERSING VALVE (L1)

DEFROST THERMOSTAT (S6)

14HPX SERIES

14HPX OPERATING SEQUENCE

This is the sequence of operation for 14HPX 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 energized during cooling demand and de-energized during 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:

4 - Demand is satisfied. Terminal Y1 is de‐energized.

5 - Compressor contactor K1 is de‐energized.

6 - 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.

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

22.

2. Evacuate the system using procedure outlined on page

23.

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 23.

5. Weigh in refrigerant using procedure outlined under figure 26.

Start-Up

IMPORTANT

Crankcase heater (if applicable) 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.

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

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

4. Replace the stem caps and tighten as specified in Operating Service Valves on page 9.

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 refrigerate by using the procedures listed under Start-Up and Charging Procedures.

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

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.

Page 40

NOTE — Refrigerant tank should be turned right-side-up to deliver vapor during charge optimizing procedure.

HFC-410A

REFRIGERANT

TANK

CHARGE IN

LIQUID PHASE

DIGITAL SCALE

MANIFOLD GAUGE SET

LOW

A

HIGH

CONNECTIONS FOR OPTIMIZING SYSTEM CHARGE

B

TRUE SUCTION PORT

CONNECTION

GAUGE SET

TEMPERATURE SENSOR

D

(LIQUID LINE)

TO LIQUID LINE SERVICE

A Close manifold gauge set valves and connect the center hose to a cylinder of HFC-410A. Set

for liquid phase charging.

B Connect the manifold gauge set's low pressure side to the true suction port.

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

D Position temperature sensor on liquid line near liquid line service port (use only for subcooling

method).

VALV E

C

Figure 24. Gauge Set Connections

NOTE — For simplify the illustration, the line set is not shown connected to service valves.

Page 41

14HPX SERIES

ADDING OR REMOVING REFRIGERANT

This system uses HFC-410A refrigerant which operates at much higher pressures than HFC-410A. 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 HFC-410A. 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 25.

AIRFLOW

INDOOR COIL

Temperature of air entering indoor coil ºF

A

Wet-bulb ºF

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

DT

DRY

BULB

C

53º

T

19º

Drop

air flow

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

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

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

Figure 25. Checking Indoor Airflow over Evaporator Coil using Delta-T Chart

Page 42

Use WEIGH IN method for adding initial refrigerant charge, and then use SUBCOOLING method for verifying refrigerant charge.

WEIGH IN

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 refrigerant charge:

CALCULATING SYSTEM CHARGE FOR

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 (see applicable charging

sticker)

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) line set*

3 ounce per 5' (85 g per 1.5 m)

SUBCOOLING

USE COOLING

MODE

60ºF (15º)

USE HEATING

MODE

SATº LIQº – SCº =

Figure 26. Weigh In Method

1 Check the airflow as illustrated in figure 25 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 on

applicable charging sticker. (The reference table is 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 8 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 table below, being sure to note any additional charge for line set and/or match-up.

10 If subcooling value is greater than shown on applicable charging sticker for the unit, remove refrigerant; if

less than shown, add refrigerant.

11 If refrigerant is added or removed, repeat steps 5 through 10 to verify charge.

Figure 27. Subcooling Method

Page 43

14HPX SERIES

Table 8. HFC-410A Temperature — Pressure (Psig)

°F °C Psig °F °C Psig

-40 -40.0 11.6 60 15.6 170

-35 -37.2 14.9 65 18.3 185

-30 -34.4 18.5 70 21.1 201

-25 -31.7 22.5 75 23.9 217

-20 -28.9 26.9 80 26.7 235

-15 -26.1 31.7 85 29.4 254

-10 -23.3 36.8 90 32.2 274

-5 -20.6 42.5 95 35.0 295 0 -17.8 48.6 100 37.8 317 5 -15.0 55.2 105 40.6 340

10 -12.2 62.3 110 43.3 365 15 -9.4 70.0 115 46.1 391 20 -6.7 78.3 120 48.9 418 25 -3.9 87.3 30 -1.1 96.8 130 54.4 476 35 1.7 107 135 57.2 507 40 4.4 11 8 140 60.0 539 45 7.2 130 50 10.0 142 55 12.8 155

125 51.7 446

145 62.8 573 150 65.6 608

Table 9. Applicable Charging Sticker by Unit Model Number

Unit Model Number

401241S 580381-01

Referenced charging stickers above are located at the end of this manual.

14HPX-018-230-XX -01, -02, -03, -10, -11, -12, -13, -14, -15 -17, -18

14HPX-024-230-XX -01, -02, -10, -11, -12, -13, -14, -15 -17, -18

14HPX-030-230-XX -01, -02, -10, -11, -12, -13, -14 -17, -18

14HPX-036-230-XX -01, -02, -10, -11, -12 -17, -18

14HPX-042-230-XX -01, -02, -10, -11, -12 -17, -18

14HPX048-230-XX -01, -02, -10, -11, -12 -17, -18

14HPX-060-230-XX -01, -02, -10, -11, -12 -17, -18

Unit Charging Sticker Numbers

Page 44

Maintenance checks using the Normal Operating Pressures table

*2P0611* *P401241S*

Table 1 may be used to help perform maintenance checks. This table is not a procedure for charging the system and any minor variations in the pressures may be expected due to differ ences in installations. However, significant deviations could mean that the system is not prop erly charged or that a problem exists with some component in the system.

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

installations 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 refriger ant charge into the unit. For charge adjustments, be sure to consider line set length differ ences and, referring to table 2, 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 differ

ences. If weighing facilities are not available use the Subcooling method.

Charge Using the Subcooling Method

Cooling Mode—When the outdoor ambient temperature is 60°F (15°C) and above, use the cooling mode to adjust the charge using the subcooling method. Target subcooling values in table 2 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 hea ting mode to adjust the charge using the subcooling charge levels (table ). Target subcooling values in table 2 are based on 65-75°F (18-24°C) indoor return air temperature.

HFC-410A CHARGING INFORMATION

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

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.

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

°F (°C)*

COOLING 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 HEATING 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 *Temperature of the air entering the outdoor coil.

Liquid Line Pressure / Vapor Line Pressure

Table 2 - Indoor Units Matchups and Subcooling Charge Levels

Target

INDOOR MATCHUPS

14HPX/XP14−018 lb oz 14HPX/XP14−030 (Continued) lb oz 14HPX/XP14/TPA*H4−042 (Continued) lb oz

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

14HPX/XP14−024 lb oz CX34-38A/B S/N# 6007 and after 6 6 2 3 CX34-60D 12 6 0 4

CBX26UH-024 25 7 0 0 CX34-38A/B Before S/N# 6007 11 6 2 3 14HPX/XP14/TPA*H4−048 lb oz 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 14HPX/XP14/TPA*H4−036 lb oz CBX27UH-048 11 8 1 2 CBX32M-030 15 8 1 3 C33-44C 13 6 0 0 CBX32M-048 and -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 and -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 and -62D 10 7 1 7 CX34-36A/B/C 16 8 1 8 CR33-50/60C 25 4 1 15 CX34-49C 11 8 0 14 CX34-38A/B S/N# 6007 and after 11 11 2 2 CR33-48B/C 25 5 0 9 CX34-60D 11 8 0 0 CX34-38A/B before S/N# 6007 14 11 2 2 CX34-49C 13 6 2 4 14HPX/XP14/TPA*H4−060 lb oz

14HPX/XP14−030 lb oz CX34-43B/C and -50/60C 13 6 1 8 CBX26UH-048 12 7 1 0

CH23-41 11 6 0 8 CX34-38A/B S/N# 6007 and after and -44/48 6 6 0 0 CBX26UH-060 13 7 0 0 CH23-51 6 6 1 12 CX34-38A/B before S/N# 6007 13 6 0 0 CBX27UH-060 12 5 0 0 CBX26UH-024 30 8 0 6 14HPX/XP14/TPA*H4−042 lb oz CBX32M-048 and -060 12 5 0 0 CBX26UH-030 29 8 2 3 CH23-68 20 9 0 13 CBX32MV-048 and -060 12 5 0 0 CBX27UH-030 11 6 2 4 CBX26UH-042 27 6 0 0 CBX40UHV-048 and -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, CBX27UH-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 and -048 12 6 0 8 CH33-62D 12 5 0 0 CBX40UHV-024 and -030 11 6 1 6 CH33-43 12 6 0 7 CX34-62C and -62D 12 7 1 0 CBX40UHV-036 15 7 3 0 CH33-62D 12 6 0 10 *Add charge = Extra matchup amount required in addition to 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

Subcooling

HeatingCooling

(+5ºF) (+1ºF)

*Add

charge

INDOOR MATCHUPS

Target

Subcooling

HeatingCoolin

g

(+5ºF) (+1ºF)

*Add

charge

Target

INDOOR MATCHUPS

charge indicated on Heat Pump nameplate (remember to also add any charge required for line set differences from 15 feet). SN indi cates serial number.

Subcooling

HeatingCooling

(+5ºF) (+1ºF)

*Add

charge

06/11 401241S

HFC-410A CHARGING INFORMATION

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)

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

SIZE

-018 67/ 272 83/ 287 100/305 118/321 137/339 145/242 145/259 146/279 147/302 148/326 149/351 151/376 151/406 153/433 154/462 155/498

-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.

HP

SIZE

-018

-024

-030

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 additional to charge shown on unit nameplate.

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

Indoor Coil or Air 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 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 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 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

Heating Mode Cooling Mode

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

Subcool

Heat Cool Heat Cool Heat Cool

Additional

ChargeHPSIZE

Indoor Coil or Air 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

ChargeHPSIZE

Indoor Coil or Air Handler

CH33-60D 12 8 0 9

-042

CBX25UH-048 15 6 2 5

-048

CBX25UH-060 15 6 2 0

-060

Subcool

3/2013 580381-01

*2P32013* *P580381-01*

Additional

Charge

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)

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

SIZE

-018 67/ 272 83/ 287 100/305 118/321 137/339 145/242 145/259 146/279 147/302 148/326 149/351 151/376 151/406 153/433 154/462 155/498

-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.

HP

Size

-018

-024

-030

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.

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

Indoor Coil or Air Handler

CBX27UH-018 13 14 1 9 CH33-42B 16 18 2 6 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 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 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 CX34-49C 10 6 1 9 CX34-25 15 9 0 15 CR33-48 38 5 0 0 CX34-60 28 7 3 14 CX34-31 15 16 0 9 CR33-50, -60 15 5 1 4 CX34-62C 10 6 3 12 CX34-36 26 6 0 9 CX34-38 15 4 0 9 CX34-62D 14 7 3 12 CX34-38 10 18 1 14 CX34-43 23 8 2 8 CBX25UH-030 9 3 0 8 CX34-44/48 40 4 0 15 CBX26UH-060 31 6 3 0 CBX25UH-036 19 11 1 5 CX34-49 11 7 3 9 CBX27UH-060 13 7 0 8 CBX26UH-030 19 11 1 5 CX34-50/60 23 8 2 8 CBX32M-060 17 5 1 4 CBX27UH-030 10 16 1 14 CBX27UH-036 10 16 1 14 CBX26UH-042 42 5 0 8 CBX32MV-060 17 5 1 4 CBX32M-030 15 4 2 7 CBX27UH-042, -048 13 5 2 2 CBX32MV-068 11 8 2 12 CBX32M-036 10 16 1 14 CBX32M-048 13 5 2 2 CBX40UHV-048 20 6 0 0 CBX32MV-024, -030 15 4 2 7 CBX32MV-048 13 5 2 2 CBX40UHV-060 17 5 1 4 CBX32MV-036 10 16 1 14 CBX40UHV-042 13 5 2 2 CH23-68 27 7 0 13 CBX40UHV-030 10 16 1 14 CBX40UHV-048 13 5 2 2 CH33-50, -60C 11 4 0 0 CBX40UHV-036 10 16 1 14 CH23-68 20 9 1 5 CH33-62D 19 6 2 4 CH23-41 11 4 0 8 CH33-43B 7 9 3 2 CR33-50/60 19 6 2 4 CH23-51 11 6 0 14 CH33-43C 22 5 1 0 CR33-60 23 6 1 3 CH33-31A 16 18 2 8 CH33-44/48B 18 4 0 0 CX34-62C 10 7 2 14 CH33-31B 16 18 2 6 CH33-48C 22 5 1 0 CX34-62D 19 7 3 2 CH33-36A 10 6 0 6 CH33-49C 16 6 1 6 CH33-36B 6 3 0 0 CH33-50, -60C 10 9 3 4

Heating Mode Cooling Mode

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

Heat

Subcool

Cool Cool

Additional

ChargeHPSize

lbs oz

Indoor Coil or Air Handler

CH33-36C 10 11 1 5 lbs oz

-030

CBX25UH-036 31 3 0 4

-036

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

-042

Subcool

Heat Cool lbs oz

Additional

Charge

HP

Size

-042

-048

-060

Indoor Coil or Air Handler

CH33-60D 12 8 0 9

CBX25UH-048 15 6 2 5

CBX25UH-060 15 6 2 0

Subcool

Heat Cool

Additional

Charge

11/2013 580381-01

*2P112013* *P580381-01*

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)

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

SIZE

-018 67/ 272 83/ 287 100/305 118/321 137/339 145/242 145/259 146/279 147/302 148/326 149/351 151/376 151/406 153/433 154/462 155/498

-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.

HP

Size

-018

-024

-030

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.

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

Indoor Coil or Air Handler

CBX27UH-018 13 14 1 9 CH33-42B 16 18 2 6 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 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 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 CX34-49C 10 6 1 9 CX34-25 15 9 0 15 CR33-48 38 5 0 0 CX34-60 28 7 3 14 CX34-31 15 16 0 9 CR33-50, -60 15 5 1 4 CX34-62C 10 6 3 12 CX34-36 26 6 0 9 CX34-38 15 4 0 9 CX34-62D 14 7 3 12 CX34-38 10 18 1 14 CX34-43 23 8 2 8 CBX25UH-030 9 3 0 8 CX34-44/48 40 4 0 15 CBX26UH-060 31 6 3 0 CBX25UH-036 19 11 1 5 CX34-49 11 7 3 9 CBX27UH-060 13 7 0 8 CBX26UH-030 19 11 1 5 CX34-50/60 23 8 2 8 CBX32M-060 17 5 1 4 CBX27UH-030 10 16 1 14 CBX27UH-036 10 16 1 14 CBX26UH-042 42 5 0 8 CBX32MV-060 17 5 1 4 CBX32M-030 7 10 1 3 CBX27UH-042, -048 13 5 2 2 CBX32MV-068 11 8 2 12 CBX32M-036 10 16 1 14 CBX32M-048 13 5 2 2 CBX40UHV-048 20 6 0 0 CBX32MV-024/030 7 10 1 3 CBX32MV-048 13 5 2 2 CBX40UHV-060 17 5 1 4 CBX32MV-036 10 16 1 14 CBX40UHV-042 13 5 2 2 CH23-68 27 7 0 13 CBX40UHV-030 10 16 1 14 CBX40UHV-048 13 5 2 2 CH33-50, -60C 11 4 0 0 CBX40UHV-036 10 16 1 14 CH23-68 20 9 1 5 CH33-62D 19 6 2 4 CH23-41 11 4 0 8 CH33-43B 7 9 3 2 CR33-50/60 19 6 2 4 CH23-51 11 6 0 14 CH33-43C 22 5 1 0 CR33-60 23 6 1 3 CH33-31A 16 18 2 8 CH33-44/48B 18 4 0 0 CX34-62C 10 7 2 14 CH33-31B 16 18 2 6 CH33-48C 22 5 1 0 CX34-62D 19 7 3 2 CH33-36A 10 6 0 6 CH33-49C 16 6 1 6 CH33-36B 6 3 0 0 CH33-50, -60C 10 9 3 4

Heating Mode Cooling Mode

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

Heat

(+5ºF)

Subcool

Cool

(+1ºF)

Additional

ChargeHPSize

lbs oz

Indoor Coil or Air Handler

CH33-36C 10 11 1 5 lbs oz

-030

CBX25UH-036 31 3 0 4

-036

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

-042

Heat

(+5ºF)

Subcool

Cool(

+

1ºF)

Additional

Charge

lbs oz

HP

Size

-042

-048

-060

Indoor Coil or Air Handler

CH33-60D 12 8 0 9

CBX25UH-048 15 6 2 5

CBX25UH-060 15 6 2 0

Heat

(+5ºF)

Subcool

Cool(

+1ºF)

Additional

Charge

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)

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

SIZE

-018 67/ 272 83/ 287 100/305 118/321 137/339 145/242 145/259 146/279 147/302 148/326 149/351 151/376 151/406 153/433 154/462 155/498

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

Heating Mode Cooling Mode

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

HP

Indoor Coil or Air

Size

Handler

CBX25UHV-018 18 5 0 0

CBX27UH-018 13 14 1 9 CBX27UH-024 13 14 1 9 CH33-42B 16 18 2 6 CBX32MV-018/024 12 14 0 0 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7 CH33-25A 14 14 0 7 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4

-018 CH33-25B 14 13 0 5 CX34-31 17 15 2 10 CR33-60D 29 5 0 4

CR33-30/36 12 5 0 7 CX34-36 25 6 0 10 CX34-49 11 6 1 4 CX34-25 15 15 1 1 CX34-38 10 19 2 14 CX34-50, -60 25 8 1 15 CX34-31 14 24 1 12 CX34-42 25 6 0 10 CX34-60 8 8 1 4 CBX25UH-024 CBX25UHV-024 CBX25UH-030 CBX25UHV-030

CBX26UH-024 17 3 0 15

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

-024 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 CBX25UH-030 CBX25UHV-030 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 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

-030 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.

Subcool

Heat

(+5ºF)

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

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

9 3 0 8 CX34-43 23 8 2 8

Additional

Cool

(+1ºF)

Charge

lbs oz lbs oz lbs oz

HP

Indoor Coil or Air

Size

Handler

CH33-36B 6 3 0 0

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

-030

CBX25UH-036 CBX25UHV-036

-036

CBX25UH-042 CBX25UHV-042

-042

Subcool

Heat

(+5ºF)

31 3 0 4

42 5 0 8 CBX32MV-048 20 6 0 0

Cool

(+1ºF)

Additional

Charge

HP

Indoor Coil or Air

Size

Handler

CH33-49C 16 6 1 6

CH33-60D 12 8 0 9

-042

CBX25UH-048 CBX25UHV-048

-048

CBX25UH-060 CBX25UHV-060

-060

Subcool

Heat

(+5ºF)

15 6 2 5

15 6 2 0

Cool

(+1ºF)

Additional

Charge

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)

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

SIZE

-018 67/ 272 83/ 287 100/305 118/321 137/339 145/242 145/259 146/279 147/302 148/326 149/351 151/376 151/406 153/433 154/462 155/498

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

Heating Mode Cooling Mode

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

HP

Indoor Coil or Air

Size

Handler

CBX25UH-018 CBX25UHV-018 CBX27UH-018 13 14 1 9 CBX27UH-024 13 14 1 9 CH33-42B 16 18 2 6 CBX32MV-018/024 12 14 0 0 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7 CH33-25A 14 14 0 7 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4

-018 CH33-25B 14 13 0 5 CX34-31 17 15 2 10 CR33-60D 29 5 0 4

CR33-30/36 12 5 0 7 CX34-36 25 6 0 10 CX34-49 11 6 1 4 CX34-25 15 15 1 1 CX34-38 10 19 2 14 CX34-50, -60 25 8 1 15 CX34-31 14 24 1 12 CX34-42 25 6 0 10 CX34-60 8 8 1 4 CBX25UH-024 CBX25UHV-024 CBX25UH-030 CBX25UHV-030

CBX26UH-024 17 3 0 15

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

-024 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 CBX25UH-030 CBX25UHV-030 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 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

-030 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.

Subcool

Heat

(+5ºF)

18 5 0 0

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

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

9 3 0 8 CX34-43 23 8 2 8

Additional

Cool

(+1ºF)

Charge

lbs oz lbs oz lbs oz

HP

Indoor Coil or Air

Size

Handler

CH33-36B 6 3 0 0

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

-030

CBX25UH-036 CBX25UHV-036

-036

CBX25UH-042 CBX25UHV-042

-042

Subcool

Heat

(+5ºF)

31 3 0 4

42 5 0 8 CBX32MV-048 20 6 0 0

Cool

(+1ºF)

Additional

Charge

HP

Indoor Coil or Air

Size

Handler

CH33-49C 16 6 1 6

CH33-60D 12 8 0 9

-042

CBX25UH-048 CBX25UHV-048

-048

CBX25UH-060 CBX25UHV-060

-060

Subcool

Heat

(+5ºF)

15 6 2 5

15 6 2 0

Cool

(+1ºF)

Additional

Charge

HFC-410A CHARGING INFORMATION — FOR COMPLETE CHARGING PROCEDURES, REFER TO THE APPLICABLE INSTALLATION OR SERVICE MANUAL

Maintenance checks using the Normal Operating Pressures table

Table 1 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 cooling 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.

Matched System Components/Charge Levels/Line Set Lengths/Liquid Line Sizing

Table 2 lists all the Lennox recommended indoor unit matches along with the charge levels for the various sizes of outdoor units. Charge levels on the unit nameplate are based on installations with 15' (4.6m) line sets; consider line set length and liquid line sizing differences when calculat ing charge adjustments. For each additional foot of 3/8" liquid line set, add 0.6 ounces or for 1/2" liquid lines, add 1.0 ounces of additional charge.

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 67/ 272 83/ 287 100/305 118/321 137/339 145/242 145/259 146/279 147/302 148/326 149/351 151/376 151/406 153/433 154/462 155/498

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

Heating Mode Cooling Mode

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

HP

Indoor Coil or Air

Size

Handler

CBX25UH-018 CBX25UHV-018 CBX27UH-018 13 14 1 9 CBX27UH-024 13 14 1 9 CH33-42B 16 18 2 6 CBX32MV-018/024 12 14 0 0 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7 CH33-25A 14 14 0 7 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4

-018 CH33-25B 14 13 0 5 CX34-31 17 15 2 10 CR33-60D 29 5 0 4

CR33-30/36 12 5 0 7 CX34-36 25 6 0 10 CX34-49 11 6 1 4 CX34-25 15 15 1 1 CX34-38 10 19 2 14 CX34-50, -60 25 8 1 15 CX34-31 14 24 1 12 CX34-42 25 6 0 10 CX34-60 8 8 1 4 CBX25UH-024 CBX25UHV-024 CBX25UH-030 CBX25UHV-030

CBX26UH-024 17 3 0 15

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

-024 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 CBX25UH-030 CBX25UHV-030 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 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

-030 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.

Subcool

Heat

(+

5ºF)

18 5 0 0

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

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

9 3 0 8 CX34-43 23 8 2 8

Additional

Cool

(+1ºF)

Charge

lbs oz lbs oz lbs oz

HP

Indoor Coil or Air

Size

Handler

CH33-36B 6 3 0 0

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

-030

CBX25UH-036 CBX25UHV-036

-036

CBX25UH-042 CBX25UHV-042

-042

Subcool

Heat

(+

5ºF)

31 3 0 4

42 5 0 8 CBX32MV-048 20 6 0 0

Cool

(+1ºF)

Additional

Charge

HP

Indoor Coil or Air

Size

Handler

CH33-49C 16 6 1 6

CH33-60D 12 8 0 9

-042

CBX25UH-048 CBX25UHV-048

-048

CBX25UH-060 CBX25UHV-060

-060

Subcool

Heat

(+

5ºF)

15 6 2 5

15 6 2 0

Cool

(+1ºF)

Additional

Charge

HFC-410A CHARGING INFORMATION — FOR COMPLETE CHARGING PROCEDURES, REFER TO THE APPLICABLE INSTALLATION OR SERVICE MANUAL

Maintenance checks using the Normal Operating Pressures table

Table 1 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 cooling 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.

Matched System Components/Charge Levels/Line Set Lengths/Liquid Line Sizing

Table 2 lists all the Lennox recommended indoor unit matches along with the charge levels for the various sizes of outdoor units. Charge levels on the unit nameplate are based on installations with 15' (4.6m) line sets; consider line set length and liquid line sizing differences when calculat ing charge adjustments. For each additional foot of 3/8" liquid line set, add 0.6 ounces or for 1/2" liquid lines, add 1.0 ounces of additional charge.

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 67/ 272 83/ 287 100/305 118/321 137/339 145/242 145/259 146/279 147/302 148/326 149/351 151/376 151/406 153/433 154/462 155/498

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

Heating Mode Cooling Mode

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

HP

Indoor Coil or Air

Size

Handler

CBX25UH-018 CBX25UHV-018 CBX27UH-018 13 14 1 9 CH33-36C 10 11 1 5 CH33-50, -60C 10 9 3 4 CBX27UH-024 13 14 1 9 CH33-42B 16 18 2 6 CH33-60D 12 8 0 9 CBX32MV-018/024 12 14 0 0 CH33-43C 4 9 1 12 CH33-62D 19 7 1 7 CBA27UHE-018/024 12 10 1 2 CR33-30, -36 22 5 1 0 CR33-50, -60 29 5 0 4

-018 CH33-25A 14 14 0 7 CX38/CX34-31 17 15 2 10 CR33-60D 29 5 0 4 CH33-25B 14 13 0 5 CX38/CX34-36 25 6 0 10 CX38/CX34-49 11 6 1 4 CR33-30/36 12 5 0 7 CX38/CX34-38 10 19 2 14 CX38/CX34-50, -60 25 8 1 15 CX38/CX34-25 15 15 1 1 CX38/CX34-42 25 6 0 10 CX38/CX34-60 8 8 1 4 CX38/CX34-31 14 24 1 12 CX38/CX34-43 13 17 2 14 CX38/CX34-62C 8 11 3 10 CBX25UH-024 CBX25UHV-024 CBX25UH-030 CBX25UHV-030 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

-024 CBA27UHE-024 16 11 1 7 CBX40UHV-036 18 3 0 5 CBA27UHE-048 16 6 1 6

CBA27UHE-030 13 11 1 3 CBA27UHE-036 20 5 0 0 CBA27UHE-060 12 7 2 3 CH23-41 10 3 0 0 CBA27UHE-042 16 6 0 11 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 CX38/CX34-49C 10 6 1 9 CX38/CX34-25 15 9 0 15 CR33-48 38 5 0 0 CX38/CX34-60 28 7 3 14 CX38/CX34-31 15 16 0 9 CR33-50, -60 15 5 1 4 CX38/CX34-62C 10 6 3 12 CX38/CX34-36 26 6 0 9 CX38/CX34-38 15 4 0 9 CX38/CX34-62D 14 7 3 12

CX38/CX34-38 10 18 1 14 CX38/CX34-43 23 8 2 8

CBX25UH-030 CBX25UHV-030 CBX25UH-036 19 11 1 5 CX38/CX34-49 11 7 3 9 CBX27UH-060 13 7 0 8 CBX26UH-030 19 11 1 5 CX38/CX34-50/60 23 8 2 8 CBX32M-060 17 5 1 4

CBX27UH-030 10 16 1 14

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

-030

CBX32M-036 10 16 1 14 CBX32M-048 13 5 2 2 CBX40UHV-048 20 6 0 0 CBX32MV-024/030 7 10 1 3 CBX32MV-048 13 5 2 2 CBX40UHV-060 17 5 1 4 CBX32MV-036 10 16 1 14 CBX40UHV-042 13 5 2 2 CBA27UHE-060 11 6 1 1 CBX40UHV-030 10 16 1 14 CBX40UHV-048 13 5 2 2 CH23-68 27 7 0 13 CBX40UHV-036 10 16 1 14 CBA27UHE-042 19 5 0 1 CH33-50, -60C 11 4 0 0 CBA27UHE-030/036 10 11 1 8 CBA27UHE-048 18 6 1 6 CH33-62D 19 6 2 4 CH23-41 11 4 0 8 CH23-68 20 9 1 5 CR33-50/60 19 6 2 4 CH23-51 11 6 0 14 CH33-43B 7 9 3 2 CR33-60 23 6 1 3 CH33-31A 16 18 2 8 CH33-43C 22 5 1 0 CX38/CX34-62C 10 7 2 14 CH33-31B 16 18 2 6 CH33-44/48B 18 4 0 0 CX38/CX34-62D 19 7 3 2 CH33-36A 10 6 0 6 CH33-48C 22 5 1 0

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)

18 5 0 0

6 6 0 9 CX38/CX34-44, -48 9 21 2 12 CX38/CX34-62D 11 7 1 15

17 3 0 15

9 3 0 8 CX38/CX34-44/48 40 4 0 15 CBX26UH-060 31 6 3 0

Additional

Cool

(+1ºF)

Charge

lbs oz lbs oz lbs oz

HP

Indoor Coil or Air

Size

Handler

CH33-36B 6 3 0 0

-030

CBX25UH-036 CBX25UHV-036

-036

CBX25UH-042 CBX25UHV-042

-042

Subcool

Heat

(+5ºF)

31 3 0 4

42 5 0 8 CBX32MV-048 20 6 0 0

Cool

(+1ºF)

Additional

Charge

HP

Indoor Coil or Air

Size

Handler

CH33-49C 16 6 1 6

-042

CBX25UH-048 CBX25UHV-048

-048

CBX25UH-060 CBX25UHV-060

-060

Subcool

Heat

(+5ºF)

15 6 2 5

15 6 2 0

Cool

(+1ºF)

Additional

Charge

Lennox 14HPX-024-230-01, 14HPX-024-230-10, 14HPX-024-230-11, 14HPX-024-230-12, 14HPX-024-230-13 Installation And Service Procedure

Specifications and Main Features

Frequently Asked Questions

User Manual