Lennox 14HPX-036-230-17 Manual

Page 1
Corp. 0719-L5 14HPX
Service Literature Revised April, 2017
INSTALLATION AND SERVICE
PROCEDURE
LOUVERED
NON-LOUVERED
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.
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®14HPX model is designed for use with
HFC-410A refrigerant only. This unit must be installed with
an approved indoor air handler or coil. See the Lennox
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)
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.

Page 2
Model Number Identification
HP X14 024 −
Unit Type
HP = Heat Pump
Refrigerant
X = R-410A
Cooling Capacity - Tons
018 = 1.5
024 = 2
030 = 2.5
036 = 3
042 = 3.5
048 = 4
060 = 5
Minor Revision Number
Nominal SEER
11
Voltage
230 = 208/230V-1phase-60hz
230
−−
Typical Serial Number Identification
19 09 C
Year Code
08 = 2008
09 = 2009
10 = 2010
Month Code
A = January
B = February
C = March
05716
5 (or 6) Digit Unique Number
Location Code
19 = Saltillo, Mexico
58 = Marshalltown, IA
Specifications
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number of Blades Diameter - inches.
14HPX-018-230-01, 10, -11, 12, -13, -14,
-15 76 8 lbs. 4 oz. 3 18
14HPX-018-230-17, -18 76 6 lbs. 11 oz. or 5 lbs.
11 oz.33 22
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 feet of line set.
3Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number of Blades Diameter - inches.
14HPX-024-230-01, -10, -11, -12, -13, -14,
-15 76 8 lbs. 0 oz. 3 18
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.33 22
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 feet of line set.
3Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number of Blades Diameter - inches.
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.33 22
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 feet of line set.
3Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

Page 3
14HPX SERIES
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number 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.33 22
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 feet of line set.
3Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.
Model Number
Unit Outdoor Fan
Sound Rating
Number (dB)1Factory Refrigerant Charge2Number 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
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 feet of line set.
3Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.
Model Number
Unit Outdoor Fan
Sound Rating
Number (dB)1Factory Refrigerant Charge2Number 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
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 feet of line set.
3Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number 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
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 feet of line set.
3Later models employed a smaller filter drier resulting in less refrigerant charge required. Verify factory charge from unit nameplate.

Page 4
Electrical Data
208/230V-60 Hz-1 Ph
Model Number Label Rev.
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated
Load
Amps
(RLA)
Locked
Rotor
Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps
(FLA)
Locked
Rotor
Amps
(LRA)
14HPX-018-230-01
1.0 20 12.3 8.97 48.0 1/5 1075 1.1 1.4
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 1.0, 2.0 &
3.0 20 12.3 8.96 48.0 1/6 825 1.1 1.87
14HPX-018-230-18 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
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.
208/230V-60 Hz-1 Ph
Model Number Label Rev.
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated
Load
Amps
(RLA)
Locked
Rotor
Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps
(FLA)
Locked
Rotor
Amps
(LRA)
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
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 1.0, 2.0,
3.0 & 4.0 30 17.9 13.44 58.0 1/6 825 1.1 1.87
14HPX-024-230-18 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
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

Page 5
14HPX SERIES
208/230V-60 Hz-1 Ph
Model Number Label Rev.
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated
Load
Amps
(RLA)
Locked
Rotor
Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps
(FLA)
Locked
Rotor
Amps
(LRA)
14HPX-030-230-01
1.0 30 17.2 12.9 64.0 1/5 825 1.1 1.4
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
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.
208/230V-60 Hz-1 Ph
Model Number Label Rev.
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated
Load
Amps
(RLA)
Locked
Rotor
Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps
(FLA)
Locked
Rotor
Amps
(LRA)
14HPX-036-230-01
1.0, 2.0,
3.0, 4.0 &
5.0
30 19.4 14.1 77.0 1/3 825 1.8 2.9
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 1.0 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
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.
208/230V-60 Hz-1 Ph
Model Number Label Rev.
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated
Load
Amps
(RLA)
Locked
Rotor
Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps
(FLA)
Locked
Rotor
Amps
(LRA)
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
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 1.0, 2.0,
3.0 & 4.0 40 24.2 17.92 112.0 1/3 825 1.8 2.9
14HPX-042-230-18 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
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

Page 6
208/230V-60 Hz-1 Ph
Model Number Label Rev.
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated
Load
Amps
(RLA)
Locked
Rotor
Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps
(FLA)
Locked
Rotor
Amps
(LRA)
14HPX-048-230-01 1.0, 2.0,
3.0 & 4.0 50 29.0 21.79 117.0 1/3 825 1.8 2.9
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 1.0, 2.0 &
3.0 50 29.0 21.76 117.0 1/3 825 1.8 2.9
14HPX-048-230-18 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
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.
208/230V-60 Hz-1 Ph
Model Number Label Rev.
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated
Load
Amps
(RLA)
Locked
Rotor
Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps
(FLA)
Locked
Rotor
Amps
(LRA)
14HPX-060-230-01 1.0, 2.0 &
3.0 60 34.8 26.41 134.0 1/3 825 1.8 2.9
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
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

Page 7
14HPX SERIES
Unit Dimensions - inches (mm)
SIDE VIEW
SUCTION AND LIQUID
LINE CONNECTION
DISCHARGE AIR
SIDE VIEW
OUTDOOR
COIL FAN
COMPRESSOR
A
B
A
OPTIONAL UNIT
STANDOFF KIT (4)
(FIELD INSTALLED)
C
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)
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 8
Typical Unit Parts Arrangement
COMPRESSOR
HARNESS
LIQUID LINE SERVICE
VALVE
VAPOR LINE
SERVICE VALVE
BI-FLOW FILTER
DRIER
DISCHARGE
LINE
HIGH PRESSURE
SWITCH (S4)
COMPRESS0R
TRUE SUCTION
PORT
CHECK EXPANSION
VALVE
DEFROST
THERMOSTAT
EQUALIZER LINE
MUFFLER
REVERSING
VALVE
REVERSING VALVE SO
LENOID
LOW PRESSURE
SWITCH
NOTE — PLUMBING LAYOUT AND COMPRESSOR TYPE MAY VARY SLIGHTLY
BETWEEN MODEL SIZES.
GROUND
LUG
CONTACTOR
CONTROL
CONTROL WIRE
LOOP
CUTOUT FOR HIGH
VOLTAGE CONDUIT
DEFROST
CONTROL
BOARD
CAPACITOR
Figure 1. Typical Unit Parts Arrangement (14HPX-XXX-230-01 through -012)

Page 9
14HPX SERIES
COMPRESSOR HARNESS
LIQUID LINE SERVICE
VALVE
VAPOR LINE
SERVICE VALVE
(ANGLE-TYPE - ALL
OTHER SIZES)
BI-FLOW FILTER
DRIER
DISCHARGE
LINE
HIGH PRESSURE SWITCH (S4)
COMPRESS0R
TRUE SUCTION
PORT
CHECK /
EXPANSION VALVE
DEFROST THERMOSTAT
(S6)
EQUALIZER LINE
MUFFLER
REVERSING
VALVE (L1)
REVERSING VALVE
SOLENOID
LOW PRESSURE
SWITCH (S87)
NOTE — PLUMBING LAYOUT AND COMPRESSOR TYPE MAY VARY
SLIGHTLY BETWEEN MODEL SIZES.
GROUND
LUG
CONTACTOR
(K-1)
CONTROL
CONTROL WIRE
LOOP
CUTOUT FOR
HIGH VOLTAGE
CONDUIT
DEFROST
CONTROL
(CMC1)
DUAL RUN
CAPACITOR
(C12) SWITCH
COVER
THERMAL
PROTECTION SWITCH
(S173) (ONLY ON
UNITS USING
EXTERNAL SWITCH)
CRANKCASE HEATER THERMOSTAT
(S40) (-036, -042, -048, -060 UNITS ONLY)
CRANKCASE
CASE HEATER
(HR1) (-036,
-042, -048, -060
UNITS ONLY)
VAPOR LINE
SERVICE VALVE
(BALL-TYPE -060
ONLY)
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.
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 10
TORQUE REQUIREMENTS
When servicing or repairing heating, ventilating, and air
conditioning components, ensure the fasteners are
appropriately tightened. Table 3 lists torque values for
fasteners.
IMPORTANT
Only use Allen wrenches of sufficient hardness (50Rc -
Rockwell Harness Scale minimum). Fully insert the
wrench into the valve stem recess.
Service valve stems are factory-torqued (from 9 ft-lbs for
small valves, to 25 ft-lbs for large valves) to prevent
refrigerant loss during shipping and handling. Using an
Allen wrench rated at less than 50Rc risks rounding or
breaking off the wrench, or stripping the valve stem
recess.
See the Lennox Service and Application Notes #C-08-1
for further details and information.
IMPORTANT
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and fitted
snugly over the cap before tightening.
When servicing or repairing HVAC components, ensure the
fasteners are appropriately tightened. Table 3 provides
torque values for fasteners.
Table 3. Torque Requirements
Parts Recommended Torque
Service valve cap 8 ft.- lb. 11 NM
Sheet metal screws 16 in.- lb. 2 NM
Machine screws #10 28 in.- lb. 3 NM
Compressor bolts 90 in.- lb. 10 NM
Gauge port seal cap 8 ft.- lb. 11 NM
USING MANIFOLD GAUGE SET
When checking the system charge, only use a manifold
gauge set that features low loss anti-blow back fittings.
Manifold gauge set used with HFC-410A refrigerant
systems must be capable of handling the higher system
operating pressures. The gauges should be rated for use
with pressures of 0 - 800 psig on the high side and a low side
of 30” vacuum to 250 psig with dampened speed to 500 psi.
Gauge hoses must be rated for use at up to 800 psig of
pressure with a 4000 psig burst rating.
OPERATING SERVICE VALVES
The liquid and vapor line service valves are used for
removing refrigerant, flushing, leak testing, evacuating,
checking charge and charging.
Each valve is equipped with a service port which has a
factory-installed valve stem. Figure 3 provides information
on how to access and operating both angle and ball service
valves.

Page 11
14HPX SERIES
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
SERVICE PORT CORE
SERVICE PORT CAP
ANGLE-TYPE SERVICE VALVE
(FRONT-SEATED CLOSED)
SERVICE PORT
CORE
TO OUTDOOR UNIT
STEM CAP
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
TO INDOOR
UNIT
ANGLE-TYPE SERVICE VALVE
(BACK-SEATED OPENED)
BALL (SHOWN
CLOSED)
SERVICE PORT
CORE
TO INDOOR UNIT
TO OUTDOOR
UNIT
TO OPEN ROTATE STEM
COUNTERCLOCKWISE 90°.
TO CLOSE ROTATE STEM
CLOCKWISE 90°.
SERVICE PORT
SERVICE PORT
CAP
STEM CAP
VALVE
STEM
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.
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°.
12
3
4
5
6
7
8
9
10
11 12
1/12 TURN
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.
12
3
4
5
6
7
8
9
10
11 12
1/6 TURN
WHEN SERVICE VALVE IS CLOSED,THE SERVICE PORT IS OPEN
TO THE LINE SET AND INDOOR UNIT.
When service valve is OPEN, the service port is
open to linE set, indoor and outdoor unit.
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:
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.
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 12
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.
See
NOTES
See NOTES
See NOTES
See
NOTES
CONTROL
BOX
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
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.
DETAIL A DETAIL B
INSTALL UNIT AWAY
FROM WINDOWS
TWO 90ELBOWS INSTALLED IN LINE SET
WILL REDUCE LINE SET VIBRATION
GROUND LEVEL
MOUNTING
SLAB
BUILDING
STRUCTURE
DISCHARGE AIR
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.
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.

Page 13
14HPX SERIES
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
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
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.
NOTICE
Roof Damage!
This system contains both refrigerant and oil. Some
rubber roofing material may absorb oil and cause the
rubber to swell when it comes into contact with oil. The
rubber will then bubble and could cause leaks. Protect the
roof surface to avoid exposure to refrigerant and oil during
service and installation. Failure to follow this notice could
result in damage to roof surface.
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.
WARNING
PANEL A
PANEL B PANEL C
PANEL D
When removing the unit panels. Remove panel Afirst, then B, Cand final
ly D. When reinstalling panels, reverse that order starting with panel D, C,
Band finally A.
REMOVAL
REPEAT STEPS 1, 2 AND
3 TO REMOVE PANELS B,
C AND FINALLY D.
STEP 1
STARTING WITH PANEL D,
INSERT PANEL UNDER UNIT
TOP CAP LIP AND LIFT
SLIGHTLY TO CLEAR SIDE LIP
OF PANEL FROM BASE.
PANEL A
PANEL A
STEP 2
INSTALLATION
REPEAT STEPS 1 AND 2 TO
INSTALL PANELS C,B AND
FINALLY A.
TO REMOVE PANEL,
REMOVE MOUNTING
SCREWS SECURING
PANEL TO THE UNIT.
SLIGHTLY LIFT PANEL AIN
ORDER TO CLEAR SIDE
LIPS OF PANEL FROM BASE
OF UNIT.
STEP 3
TILT PANEL OUT SLIGHTLY
AND PULL DOWNWARD TO
REMOVE.
STEP 1
STEP 2
MOVE PANEL IN TOWARDS UNIT.
ALIGN LEFT/RIGHT SIDE LIPS OF
PANEL WITH GROOVE INSERTS
ALONG LEFT/RIGHT SIDE OF UNIT.
PANEL D
TOP CAP
BASE
SIDE
GROOVE
STEP 3
SECURE PANEL, WITH
MOUNTING SCREWS.
Figure 6. Louvered Panels

Page 14
Removing and Installing Louvered Panels – Later Builds
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.
WARNING
REMOVAL
STEP 1
INSERT PANEL UNDER UNIT
TOP CAP LIP AND LIFT
SLIGHTLY TO CLEAR SIDE LIP
OF PANEL FROM BASE.
STEP 2
PANEL INSTALLATION
TO REMOVE PANEL,
REMOVE MOUNTING
SCREWS SECURING
PANEL TO THE UNIT.
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.
STEP 1
STEP 2
MOVE PANEL IN TOWARDS UNIT.
ALIGN LEFT/RIGHT SIDE LIPS OF
PANEL WITH GROOVE INSERTS
ALONG LEFT/RIGHT SIDE OF UNIT.
TOP CAP
BASE
SIDE
GROOVE
STEP 3
SECURE PANEL, WITH
MOUNTING SCREWS.
PANEL LEFT
PANEL RIGHT
PANEL CENTER
CORNER
POST
CORNER POST
PANEL CENTER
CORNER
POST
Figure 7. Louvered Panels

Page 15
14HPX SERIES
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.
Table 4. Refrigerant Line Set (MM)
Model
Field
Connections Recommended Line Set
Liquid
Line
Vapor
Line
Liquid
Line
Vapor
Line
L15
Line Sets
-018
-024
-030
3/8 in.
(10 mm)
3/4 in
(19 mm)
3/8 in.
(10
mm)
3/4 in
(19
mm)
L15-41
15 ft. - 50 ft.
(4.6 m - 15
m)
-036
-042
-048
3/8 in.
(10 mm)
7/8 in
(22 mm)
3/8 in.
(10
mm)
7/8 in
(22
mm)
L15-65
15 ft. - 50 ft.
(4.6 m - 15
m)
-060 3/8 in.
(10 mm)
7/8 in.
(22 mm)
3/8 in.
(10
mm)
7/8 in.
(22
mm)
Field
Fabricated
NOTE — Some applications may require a field provided 7/8” to
1-1/8” adapter
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.
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
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 16
ANCHORED HEAVY NYLON
WIRE TIE OR AUTOMOTIVE
MUFFLER‐TYPE HANGER
STRAP LIQUID LINE TO
VAPOR LINE
WALL
STUD
LIQUID LINE
NON-CORROSIVE
METAL SLEEVE
VAPOR LINE - WRAPPED
IN ARMAFLEX
AUTOMOTIVE
MUFFLER‐TYPE HANGER
REFRIGERANT LINE SET — TRANSITION
FROM VERTICAL TO HORIZONTAL
Line Set Isolation — The following illustrations are
examples of proper refrigerant line set isolation:
STRAPPING
MATERIAL (AROUND
VAPOR LINE ONLY)
TAPE OR
WIRE TIE
WIRE TIE (AROUND
VAPOR LINE ONLY)
FLOOR JOIST OR
ROOF RAFTER
TAPE OR
WIRE TIE
To hang line set from joist or rafter, use either metal strapping material
or anchored heavy nylon wire ties.
8 FEET (2.43 METERS)
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.
FLOOR JOIST OR
ROOF RAFTER
REFRIGERANT LINE SET — INSTALLING
HORIZONTAL RUNS
NOTE — Similar installation practices should be used if line set is
to be installed on exterior of outside wall.
PVC
PIPE
FIBERGLASS
INSULATION
CAULK
OUTSIDE
WALL
VAPOR LINE WRAPPED
WITH ARMAFLEX
LIQUID
LINE
OUTSIDE WALL LIQUID LINE
VAPOR LINE
WOOD BLOCK
BETWEEN STUDS
STRAP
WOOD BLOCK
STRAP
SLEEVE
WIRE TIE
WIRE TIE
WIRE TIE
INSIDE WALL
REFRIGERANT LINE SET — INSTALLING
VERTICAL RUNS (NEW CONSTRUCTION SHOWN)
INSTALLATION
LINE SET
NOTE — Insulate liquid line when it is routed through areas where the
surrounding ambient temperature could become higher than the
temperatureof the liquid line or when pressure drop is equal to or greater
than 20 psig.
NON-CORROSIVE
METAL SLEEVE
IMPORTANT — Refrigerant lines must not contact structure.
NON-CORROSIVE
METAL SLEEVE
8 FEET (2.43 METERS)
IMPORTANT — Refrigerant lines must not contact wall
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 17
14HPX SERIES
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.
WARNING
When using a high pressure gas such as
dry nitrogen to pressurize a refrigeration or
air conditioning system, use a regulator
that can control the pressure down to 1 or
2 psig (6.9 to 13.8 kPa).
CAUTION
Brazing alloys and flux contain materials which are
hazardous to your health.
Avoid breathing vapors or fumes from brazing operations.
Perform operations only in well-ventilated areas.
Wear gloves and protective goggles or face shield to
protect against burns.
Wash hands with soap and water after handling brazing
alloys and flux.
IMPORTANT
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
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 18
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND SUCTION / VAPOR LINE SERVICE
VALVES
OUTDOOR
UNIT
LIQUID LINE
VAPOR LINE
LIQUID LINE SERVICE
VALVE
SUCTION /
VAPOR LINE
SERVICE
VALVE
ATTACH
GAUGES
INDOOR
UNIT
SUCTION / VAPOR SERVICE PORT MUST BE
OPEN TO ALLOW EXIT POINT FOR NITROGEN
AConnect gauge set low pressure side to
liquid line service valve (service port).
BConnect gauge set center port to bottle of
nitrogen with regulator.
CRemove core from valve in suction / vapor
line service port to allow nitrogen to escape.
NITROGEN
HIGHLOW
USE REGULATOR TO FLOW
NITROGEN AT 1 TO 2 PSIG.
B
A
C
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
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.
CUT AND DEBUR CAP AND CORE REMOVAL
Cut ends of the refrigerant lines square (free from nicks or dents)
and debur the ends. The pipe must remain round. Do not crimp end
of the line.
Remove service cap and core from
both the suction / vapor and liquid line
service ports.
12
LIQUID LINE SERVICE
VALVE
SERVICE
PORT
CORE
SERVICE PORT
CAP
SERVICE
PORT
CORE
SERVICE
PORT CAP
CUT AND DEBUR
LINE SET SIZE MATCHES
SERVICE VALVE CONNECTION
COPPER TUBE
STUB
SERVICE VALVE
CONNECTION
REFRIGERANT LINE
DO NOT CRIMP SERVICE VALVE
CONNECTOR WHEN PIPE IS
SMALLER THAN CONNECTION
REDUCER
3
SUCTION / VAPOR LINE
SERVICE VALVE
LINE SET SIZE IS SMALLER
THAN CONNECTION
Figure 9. Brazing Procedures

Page 19
14HPX SERIES
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
LIQUID LINE SERVICE VALVE
LIQUID LINE
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
saturated cloths must remain water saturated throughout the brazing and cool-down process.
WATER SATURATED
CLOTH
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.
6
SUCTION / VAPOR LINE
WATER SATURATED
CLOTH
SUCTION / VAPOR LINE
SERVICE VALVE
After all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water saturated cloths to both
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.
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
PREPARATION FOR NEXT STEP
7
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.
WRAP SERVICE VALVES
To help protect service valve seals during brazing, wrap water saturated cloths around service valve bodies and copper tube stubs. Use
additional water saturated cloths underneath the valve body to protect the base paint.
4
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
out of the suction / vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set connections
5
Figure 10. Brazing Procedures (continued)

Page 20
Flushing Line Set and Indoor Coil
SENSING
LINE
TEFLON®RING
FIXED ORIFICE
BRASS NUT
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
LIQUID LINE ORIFICE HOUSING
DISTRIBUTOR TUBES
DISTRIBUTOR
ASSEMBLY
REMOVE AND DISCARD
WHITE TEFLON®SEAL
(IF PRESENT)
AOn fully cased coils, remove the coil access and plumbing panels.
BRemove any shipping clamps holding the liquid line and distributor as
sembly.
CUsing two wrenches, disconnect liquid line from liquid line orifice hous
ing. Take care not to twist or damage distributor tubes during this pro
cess.
DRemove and discard fixed orifice, valve stem assembly if present and
Teflon®washer as illustrated above.
EUse a field-provided fitting to temporarily reconnect the liquid line to the
indoor unit's liquid line orifice housing.
TYPICAL EXISTING FIXED ORIFICE
REMOVAL PROCEDURE (UNCASED
COIL SHOWN)
TYPICAL EXISTING EXPANSION VALVE REMOVAL
PROCEDURE (UNCASED COIL SHOWN)
TWO PIECE PATCH PLATE
(UNCASED COIL ONLY)
VAPOR
LINE
DISTRIBUTOR
ASSEMBLY
DISTRIBUTOR
TUBES
LIQUID
LINE
MALE EQUALIZER
LINE FITTING
EQUALIZER
LINE
CHECK
EXPANSION
VALVE
TEFLON®
RING
STUB END
TEFLON®
RING
SENSING BULB
LIQUID LINE
ORIFICE
HOUSING
LIQUID LINE
ASSEMBLY WITH
BRASS NUT
AOn fully cased coils, remove the coil access and plumbing panels.
BRemove any shipping clamps holding the liquid line and distributor
assembly.
CDisconnect the equalizer line from the check expansion valve
equalizer line fitting on the vapor line.
DRemove the vapor line sensing bulb.
EDisconnect the liquid line from the check expansion valve at the liquid
line assembly.
FDisconnect the check expansion valve from the liquid line orifice
housing. Take care not to twist or damage distributor tubes during this
process.
GRemove and discard check expansion valve and the two Teflon®rings.
HUse a field-provided fitting to temporary reconnect the liquid line to the
indoor unit's liquid line orifice housing.
LOW HIGH
EXISTING
INDOOR
UNIT
GAUGE
MANIFOLD
INVERTED CYLINDER
CONTAINS CLEAN
HCFC22* TO BE USED
FOR FLUSHING.
LIQUID LINE SERVICE
VALVE
INLET
DISCHARGE
TANK
RETURN
CLOSED
OPENED
RECOVERY CYLINDER RECOVERY MACHINE
NEW
OUTDOOR
UNIT
VAPOR LINE
SERVICE VALVE
VAPOR
LIQUID
1
AInverted HCFC-22 cylinder with clean refrigerant* to the vapor service
valve.
BHCFC-22 gauge set (low side) to the liquid line valve.
CHCFC-22 gauge set center port to inlet on the recovery machine with an
empty recovery tank to the gauge set.
DConnect recovery tank to recovery machines per machine instructions.
CONNECT GAUGES AND EQUIPMENT FOR
FLUSHING PROCEDURE
A
B
C
D
B
OR
FLUSHING LINE SET
ASet 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.
BInvert 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.
CAfter 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.
DClose 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.
The line set and indoor unit coil must be flushed with at least the
same amount of clean refrigerant* that previously charged the
system. Check the charge in the flushing cylinder before
proceeding.
1A
2
3
1B
*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.
Figure 11. Removing Metering Device and Flushing