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
Sound Rating Number
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
Charge
2
3
2
2
Number of Blades Diameter - inches.
3 22
Number of Blades Diameter - inches.
3
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
SERVICE PORT
SERVICE PORT
CORE
CAP
TO OUTDOOR
UNIT
BALL (SHOWN
CLOSED)
VALV E
STEM
STEM CAP
STEM CAP
ANGLE-TYPE SERVICE VALVE
(FRONT-SEATED CLOSED)
WHEN SERVICE VALVE IS CLOSED, THE SERVICE PORT IS OPEN
TO
THE LINE SET AND INDOOR UNIT.
To Access Service Port:
A service port cap protects the service port core from contamination and
serves as the primary leak seal.
1. Remove service port cap with an appropriately sized wrench.
2. Connect gauge set to service port.
3. When testing is completed, replace service port cap and tighten as
follows:
With torque wrench: Finger tighten and
torque cap per table 3.
Without torque wrench: Finger tighten and
use an appropriately sized wrench to turn
an additional 1/6 turn clockwise.
Reinstall Stem Cap:
Stem cap protects the valve stem from damage and serves as the
primary seal. Replace the stem cap and tighten as follows:
9
10
8
11
12
7
6
With Torque Wrench: Finger tighten and
then torque cap per table 3.
Without Torque Wrench: Finger 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
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)
3/8 in.
(10 mm)
3/8 in.
(10 mm)
Vapor
Line
3/4 in
(19 mm)
7/8 in
(22 mm)
7/8 in.
(22 mm)
Recommended Line Set
Liquid
Line
3/8 in.
(10
mm)
3/8 in.
(10
mm)
3/8 in.
(10
mm)
Vapor
Line
3/4 in
(19
mm)
7/8 in
(22
mm)
7/8 in.
(22
mm)
L15
Line Sets
L15-41
15 ft. - 50 ft.
(4.6 m - 15
m)
L15-65
15 ft. - 50 ft.
(4.6 m - 15
m)
Field
Fabricated
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
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