Lennox XP16 Installation and operation manual

Page 1 2006 Lennox Industries Inc.
Corp. 0626−L5
Revised October 21, 2010
XP16
Service Literature
XP16 (HFC−410A) SERIES UNITS
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
CAUTION
Physical contact with metal edges and corners while
applying excessive force or rapid motion can result in
personal injury. Be aware of, and use caution when
working near these areas during installation or while
servicing this equipment.
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.
TABLE OF CONTENTS
Model Number Identification 2. . . . . . . . . . . . . . . . . . . .
Typical Serial Number Identification 2. . . . . . . . . . . . . .
Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Parts Arrangement 5. . . . . . . . . . . . . . . . . . . . . . . .
Operating Gauge Set and Service Valves 7. . . . . . . . .
Recovering Refrigerant from System 9. . . . . . . . . . . . .
Unit Placement 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and Installing Panels 12. . . . . . . . . . . . . . . . .
New or Replacement Line Set 14. . . . . . . . . . . . . . . . . .
Brazing Connections 16. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing Line Set and Indoor Coil 19. . . . . . . . . . . . . . .
Installing Indoor Metering Device 20. . . . . . . . . . . . . . . .
Leak Test Line Set and Indoor Coil 21. . . . . . . . . . . . . .
Evacuating Line Set and Indoor Coil 22. . . . . . . . . . . . .
Electrical 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Units Void of Charge 24. . . . . . . . . . . . . . . . . .
Unit Start−Up 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Refrigerant 24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Wiring Diagram and Sequence of
Operations 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checklists 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The XP16 is a high efficiency residential split−system
two−stage heat pump unit, which features a scroll
compressor and HFC−410A refrigerant. XP16 units are
available in 2, 3, 4 and 5 tons. tons. XP16 units are rated for
230 volts only. Applications where supply voltage is less
requires a hard start kit. The series is designed for use with
an indoor unit with an expansion valve approved for
HFC−410A.
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.

Page 2 XP16
Model Number Identification
P 16 036
− −
Unit Type
P = Heat Pump
Series
Nominal Cooling Capacity
024 = 2 tons
036 = 3 tons
048 = 4 tons
060 = 5 tons
Minor Revision Number
230
Voltage
230 = 208/230V−1ph−60hz
Refrigerant Type
X = HFC−410A
X 5
−
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.
XP16−024−230−01 74 9 lbs. 9 oz. 3 18
XP16−024−230−03 74 7 lbs. 13 oz. 3 18
XP16−024−230−04 74 7 lbs. 13 oz. 3 18
XP16−024−230−05 74 8 lbs. 13 oz. 3 18
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number of Blades Diameter − inches.
XP16−036−230−01 76 12 lbs. 8 oz. 4 22
XP16−036−230−02 76 12 lbs. 8 oz. 4 22
XP16−036−230−03 76 10 lbs. 4 oz. 4 22
XP16−036−230−04 76 10 lbs. 4 oz. 4 22
XP16−036−230−05 76 10 lbs. 9 oz. 4 22
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number of Blades Diameter − inches.
XP16−048−230−01 76 15 lbs. 7 oz. 4 22
XP16−048−230−02 76 15 lbs. 7 oz. 4 22
XP16−048−230−03 76 15 lbs. 7 oz. 4 22
XP16−048−230−04 76 15 lbs. 7 oz. 4 22
XP16−048−230−05 76 11 lbs. 12 oz. 3 26
Model Number
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number of Blades Diameter − inches.
XP16−060−230−01 78 13 lbs. 8 oz. 3 26
XP16−060−230−02 78 13 lbs. 8 oz. 3 26
XP16−060−230−03 78 11 lbs. 7 oz. 3 26
XP16−060−230−04 78 11 lbs. 7 oz. 3 26
XP16−060−230−05 78 12 lbs. 15 oz. 3 26
1Tested according to AHRI Standard 270−2008 test conditions.
2Refrigerant charge sufficient for 15 feet length of refrigerant lines.

Page 3
XP16
Electrical Data
208/230V−60 Hz−1 Ph
Model Number
Unit Compressor Condenser Fan
Maximum
Over−
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated Load
Amps (RLA)
Locked
Rotor
Amps
(LRA)
Motor
HP
Motor
Type
Nominal
RPM
Full Load
Amps (FLA)
Locked Rotor
Amps (LRA)
XP16−024−230−01 20 14.0 10.25 52.0 1/10 PSC 1075 0.7 1.4
XP16−024−230−03 20 14.0 10.25 52.0 1/10 PSC 1075 0.7 1.4
XP16−024−230−04 20 14.0 10.25 52.0 1/10 PSC 1075 0.7 1.4
XP16−024−230−05 20 14.0 10.25 52.0 1/10 PSC 1075 0.7 1.4
208/230V−60 Hz−1 Ph
Model Number
Unit Compressor Condenser Fan
Maximum
Over−
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated Load
Amps (RLA)
Locked
Rotor
Amps
(LRA)
Motor
HP Motor Type Nominal RPM
Full Load
Amps (FLA)
Locked Rotor
Amps (LRA)
XP16−036−230−01 35 22.0 16.67 82.0 1/6 PSC 825 1.1 2.1
XP16−036−230−02 35 22.0 16.67 82.0 1/6 PSC 825 1.1 2.1
XP16−036−230−03 35 22.0 16.67 82.0 1/6 PSC 825 1.1 2.1
XP16−036−230−04 35 22.0 16.67 82.0 1/6 PSC 825 1.1 1.87
XP16−036−230−05 35 22.5 16.67 82.0 1/4 PSC 825 1.7 3.1
208/230V−60 Hz−1 Ph
Model Number
Unit Compressor Condenser Fan
Maximum
Over−
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated Load
Amps (RLA)
Locked
Rotor
Amps
(LRA)
Motor
HP Motor Type Nominal RPM
Full Load
Amps (FLA)
Locked Rotor
Amps (LRA)
XP16−048−230−01 45 28.2 21.15 96.0 1/4 PSC 825 1.7 3.1
XP16−048−230−02 45 28.2 21.15 96.0 1/4 PSC 825 1.7 3.1
XP16−048−230−03 45 28.2 21.15 96.0 1/4 PSC 825 1.7 3.1
XP16−048−230−04 45 28.2 21.15 96.0 1/4 PSC 825 1.7 3.1
XP16−048−230−05 45 28.2 21.15 96.0 1/3 PSC 825 1.8 2.9
208/230V−60 Hz−1 Ph
Model Number
Unit Compressor Condenser Fan
Maximum
Over−
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated Load
Amps (RLA)
Locked
Rotor
Amps
(LRA)
Motor
HP Motor Type3Nominal RPM
Full Load
Amps (FLA)
Locked Rotor
Amps (LRA)
XP16−060−230−01 55 33.9 25.64 118.0 1/3 PSC 825 1.8 2.9
XP16−060−230−02 60 33.9 25.87 118.0 1/3 PSC 825 1.8 2.9
XP16−060−230−03 60 33.9 25.87 118.0 1/3 PSC 825 1.8 2.9
XP16−060−230−04 60 33.9 25.87 118.0 1/3 PSC 825 1.8 2.9
XP16−060−230−05 60 35.1 25.87 118.0 1/3 VS
700
(1st Stage) 2.8 N/A
820
(2nd Stage)
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.
3PSC = permanent split capacitor motor (single speed); VS = variable speed.

Page 4 XP16
Unit Dimensions − Inches (mm)
ELECTRICAL INLETS
SIDE VIEW
SUCTION LINE
CONNECTION
LIQUID LINE
CONNECTION
4−1/2"
(108)
4−3/4"
(121)
TOP VIEW
A
B
C
UNIT SUPPORT
FEET
8−1/2
(216)
XP16−024 BASE SECTION
8−3/4
(222)
5−1/2
(140)
9−1/2
(241)
8−1/4
(210)
13−1/2
(343)
D
G
K
J
E
F
UNIT SUPPORT FEET
XP16−036 to −060 BASE WITH LEGS
H
Model Number A B C D E F G H J K
XP16−024−01,
−02, −03, −04 31 (889) 27 (686) 28 (711) − − − − − − −
XP16−024−05 35 (889) 27 (686) 28 (711) − − − − − − −
XP16−036−01,
−02, −03, −04 35 (889) 30−1/2 (775) 35 (889) 13−7/8 (352) 7−3/4 (197) 3−1/4 (83) 27−1/8 (689) 3−5/8 (92) 4−1/2 (114) 20−5/8 (524)
XP16−036−05 39 (991) 30−1/2 (775) 35 (889) 13−7/8 (352) 7−3/4 (197) 3−1/4 (83) 27−1/8 (689) 3−5/8 (92) 4−1/2 (114) 20−5/8 (524)
XP16−048−01,
−02, −03, −04 45 (1143) 30−1/2 (775) 35 (889)) 16−7/8 (429) 8−3/4 (222) 3−1/8 (79) 30−3/4 (781) 4−5/8 (117) 3−3/4 (95) 26−7/8 (683)
XP16−048−05 35 (889) 35−1/2 (902) 39−1/2
(1003) 16−7/8 (429) 8−3/4 (222) 3−1/8 (79) 30−3/4 (781) 4−5/8 (117) 3−3/4 (95) 26−7/8 (683)
XP16−060−01,
−02, −03, −04 39 (991) 35−1/2 (902) 39−1/2 (1003) 16−7/8 (429) 8−3/4 (222) 3−1/8 (79) 30−3/4 (781) 4−5/8 (117) 3−3/4 (95) 26−7/8 (683)
XP16−060−05 45 (1143 35−1/2 (902) 39−1/2
(1003) 16−7/8 (429) 8−3/4 (222) 3−1/8 (79) 30−3/4 (781) 4−5/8 (117) 3−3/4 (95) 26−7/8 (683)

Page 5
XP16
Typical Unit Parts Arrangement
CHECK
EXPANSION VALVE
VAPOR VALVE AND GAUGE
PORT / SUCTION LINE
CONNECTIONS
EXPANSION VALVE SENSING BULB
LOW PRESSURE SWITCH (S87)
LIQUID LINE BI−FLOW FILTER DRIER
HIGH PRESSURE SWITCH (S4)
COMPRESSOR
LIQUID VALVE AND GAUGE PORT / LIQUID LINE CONNECTIONS
REVERSING VALVE
DEFROST CONTROL (A108)
CONTACTOR
(K−1)
GROUND
LUG AMBIENT
TEMPERATURE
SENSOR (RT13)
TRUE SUCTION PORT
DISCHARGE LINE SENSOR (RT28)
CAPACITOR (LOCATION OF
CAPACITOR VARIES.)
FOR COIL SENSOR (RT21) LOCATION
SEE FIGURE 2.
REVERSING VALVE SOLENOID
CRANKCASE HEATER THERMOSTAT (S40)
Figure 1. Typical Parts Arrangements

Page 6 XP16
CLIP COIL TEMPERATURE SENSOR FROM THE DEFROST BOARD ON THE RETURN BEND SHOWN.
XP16−024
COIL SENSOR
7 tubes up from
bottom (7−1/2")
XP16−036
COIL SENSOR
17 tubes up
from bottom
(17−1/2")
XP16−048
COIL SENSOR
13 tubes up from
bottom (12−1/2")
XP16−060
COIL SENSOR
12 tubes up from
bottom (11−1/2")
XP16−024
COIL SENSOR −THIRD
HAIRPIN DOWN FROM
THE TOP ON INSIDE
ROW.
XP16−036
COIL SENSOR − NINTH
HAIRPIN UP FROM THE
BOTTOM ON INSIDE
ROW.
XP16−048
COIL SENSOR − EIGHT HAIRPIN
UP FROM THE BOTTOM ON
INSIDE ROW.
XP16−060
COIL SENSOR −
SIXTH HAIRPIN UP
FROM THE BOTTOM
ON INSIDE ROW.
(XP16−XXX−230−01 through 04)
(XP16−XXX−230−05)
Figure 2. Coil Sensor (RT21) Locations

Page 7
XP16
WARNING
This product and/or the indoor unit it is matched with may
contain fiberglass wool.
Disturbing the insulation during installation, maintenance,
or repair will expose you to fiberglass wool dust. Breathing
this may cause lung cancer. (Fiberglass wool is known to
the State of California to cause cancer.)
Fiberglass wool may also cause respiratory, skin, and eye
irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets available
from address shown below, or contact your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
Operating Gauge Set and Service Valves
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
TORQUE REQUIREMENTS
When servicing or repairing heating, ventilating, and air
conditioning components, ensure the fasteners are
appropriately tightened. Table 1 lists torque values for
fasteners.
IMPORTANT
Only use Allen wrenches of sufficient hardness (50Rc −
Rockwell Harness Scale minimum). Fully insert the
wrench into the valve stem recess.
Service valve stems are factory−torqued (from 9 ft−lbs for
small valves, to 25 ft−lbs for large valves) to prevent
refrigerant loss during shipping and handling. Using an
Allen wrench rated at less than 50Rc risks rounding or
breaking off the wrench, or stripping the valve stem
recess.
See the Lennox Service and Application Notes #C−08−1 for
further details and information.
IMPORTANT
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and fitted
snugly over the cap before tightening.
Table 1. 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 8 XP16
(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 clock-
wise 90°.
1
2
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:
DWith torque wrench: Finger tighten and
torque cap per table 1.
DWithout 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:
DWith Torque Wrench: Finger tighten and
then torque cap per table 1.
DWithout Torque Wrench: Finger
tighten 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 9
XP16
Recovering Refrigerant from System
MAIN FUSE BOX/BREAKER PANEL
Disconnect all power to the existing outdoor unit at the disconnect
switch or main fuse box/breaker panel.
DISCONNECT POWER CONNECT MANIFOLD GAUGE SET
MANIFOLD GAUGES
RECOVERY MACHINE
CLEAN RECOVERY
CYLINDER
OUTDOOR UNIT
HIGH
LOW
Connect a gauge set, clean recovery cylinder and a recovery
machine to the service ports of the existing unit. Use the
instructions provided with the recovery machine to make the
connections.
METHOD 1:
Us this method if the existing outdoor unit is not equipped with shut−off valves, or if the unit is not operational and you plan to use the existing
HCFC−22 to flush the system.
Remove all HCFC−22 refrigerant from the existing system. Check gauges after shutdown to confirm that the entire system is completely void of
refrigerant.
METHOD 2:
Use this method if the existing outdoor unit is equipped with manual shut−off valves, and you plan to use new HCFC−22 refrigerant to flush the
system.
The following devices could prevent full system charge recovery into the outdoor unit:
DOutdoor unit’s high or low−pressure switches (if applicable) when tripped can cycle the compressor OFF.
DCompressor can stop pumping due to tripped internal pressure relief valve.
DCompressor has internal vacuum protection that is designed to unload the scrolls (compressor stops pumping) when the pressure ratio meets
a certain value or when the suction pressure is as high as 20 psig. (Compressor suction pressures should never be allowed to go into a vacuum.
Prolonged operation at low suction pressures will result in overheating of the scrolls and permanent damage to the scroll tips, drive bearings
and internal seals.)
Once the compressor can not pump down to a lower pressure due to one of the above system conditions, shut off the vapor valve. Turn OFF the
main power to unit and use a recovery machine to recover any refrigerant left in the indoor coil and line set.
Perform the following task:
AStart the existing HCFC−22 system in the cooling mode and close the liquid line valve.
BUse the compressor to pump as much of the existing HCFC−22 refrigerant into the outdoor unit until the outdoor system is full. Turn the outdoor
unit main power OFF and use a recovery machine to remove the remaining refrigerant from the system.
NOTE  It may be necessary to bypass the low pressure switches (if equipped) to ensure complete refrigerant evacuation.
CWhen the low side system pressures reach 0 psig, close the vapor line valve.
DCheck gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system.
Remove existing HCFC−22 refrigerant using one of the following procedures:
RECOVERING REFRIGERANT
IMPORTANT  Some system configurations may contain higher than normal refrigerant charge due to either large internal coil vol-
umes, and/or long line sets.
12
3
DISCONNECT
SWITCH
MAIN FUSE
BOX/BREAKER
PANEL
Figure 4. Refrigerant Recovery

Page 10 XP16
CONTROL PANEL
ACCESS
LOCATION
6 (152)
36 (914)
12 (305) 30 (762)
LINE SET
CONNECTIONS
24 (610)
48 (1219)
MINIMUM CLEARANCE BETWEEN
TWO UNITS
CLEARANCE ON ALL SIDES  INCHES (MILLIMETERS)
ACCESS PANEL
MINIMUM CLEARANCE
ABOVE UNIT
NOTES:
DClearance to one of the other three
sides must be 36 inches (914mm).
DClearance to one of the remaining
two sides may be 12 inches
(305mm) and the final side may be
6 inches (152mm).
Figure 5. Installation Clearances
Unit Placement
CAUTION
In order to avoid injury, take proper precaution when lifting
heavy objects.
See Unit Dimensions on page 3 for sizing mounting slab,
platforms or supports. Refer to figure 5 for mandatory
installation clearance requirements.
POSITIONING CONSIDERATIONS
Consider the following when positioning the unit:
DSome 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.
DWhen possible, do not install the unit directly outside a
window. Glass has a very high level of sound
transmission. For proper placement of unit in relation to
a window see the provided illustration in figure 6, detail
A.
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 6, detail B.
NOTE  If necessary for stability, anchor unit to slab as
described in figure 6, detail D.
ELEVATING THE UNIT
Units are outfitted with elongated support feet as illustrated
in figure 6, detail C.
If additional elevation is necessary, raise the unit by
extending the height of the unit support feet. This may be
achieved by using a 2 inch (50.8mm) Schedule 40 female
threaded adapter.
The specified coupling will fit snuggly into the recessed
portion of the feet. Use additional 2 inch (50.8mm) Schedule
40 male threaded adaptors which can be threaded into the
female threaded adaptors to make additional adjustments to
the level of the unit.
NOTE  Keep the height of extenders short enough to
ensure a sturdy installation. If it is necessary to extend
further, consider a different type of field−fabricated
framework that is sturdy enough for greater heights.

Page 11
XP16
LEG DETAIL
BASE
2" (50.8MM) SCH 40
FEMALE THREADED
ADAPTER
Concrete slab  use two plastic anchors (hole
drill 1/4")
Wood or plastic slab  no plastic anchor (hole
drill 1/8")
COIL
BASE PAN
CORNER POST
STABILIZING BRACKET (18 GAUGE
METAL  2" WIDTH; HEIGHT AS
REQUIRED)
 Slab Side Mounting
#10 1/2" LONG SELF−DRILLING
SHEET METAL SCREWS
#10 1−1/4" LONG HEX HD SCREW
AND FLAT WASHER
MINIMUM ONE
PER SIDE
Stabilizing bracket (18 gauge metal  2" (50.8mm) width; height as required); bend to form
right angle as exampled below.
FOR EXTRA
STABILITY
 Deck Top Mounting
 Elevated Slab Mounting
using Feet Extenders
STABILIZING UNIT ON UNEVEN SURFACES
Install unit level or, if on a slope, maintain slope tolerance of two
(2) degrees (or two inches per five feet [50 mm per 1.5 m]) away
from building structure.
MOUNTING
SLAB
BUILDING
STRUCTURE
GROUND LEVEL
 Outside Unit Placement  Slab Mounting at Ground Level
SAME FASTENERS AS
SLAB SIDE MOUNTING.
IMPORTANT  To help stabilize an outdoor unit, some installations may require strapping the unit to the pad using brackets and anchors
commonly available in the marketplace.
DETAIL A DETAIL B
DETAIL C
DETAIL D
2" (50.8MM) SCH 40
MALE THREADED
ADAPTER
Use additional 2" SCH 40 male threaded adapters
which can be threaded into the female threaded
adapters to make additional adjustments to the level
of the unit.
TWO 90° ELBOWS INSTALLED IN LINE SET WILL
REDUCE LINE SET VIBRATION.
Install unit away from windows.
One bracket per side (minimum). For extra stability, two brackets per side, two inches
(51mm) from each corner.
DETAIL E
Figure 6. Placement, Slab Mounting and Stabilizing Unit

Page 12 XP16
STABILIZING UNIT ON UNEVEN SURFACES
IMPORTANT
Unit Stabilizer Bracket Use (field−provided):
Always use stabilizers when unit is raised above the
factory height. (Elevated units could become unstable in
gusty wind conditions).
Stabilizers may be used on factory height units when
mounted on unstable an uneven surface.
With unit positioned at installation site, perform the
following:
1. Remove two side louvered panels to expose the unit
base.
2. Install the brackets as illustrated in figure 6, detail D or
E using conventional practices.
3. Replace the panels after installation is complete.
ROOF MOUNTING
Install the unit a minimum of 6 inches (152 mm) above the
roof surface to avoid ice build−up around the unit. Locate the
unit above a load bearing wall or area of the roof that can
adequately support the unit. Consult local codes for rooftop
applications.
If unit coil cannot be mounted away from prevailing winter
winds, a wind barrier should be constructed. Size barrier at
least the same height and width as outdoor unit. Mount
barrier 24 inches (610 mm) from the sides of the unit in the
direction of prevailing winds.
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 Panels
IMPORTANT
Do not allow panels to hang on unit by top tab. Tab is for
alignment and not designed to support weight of panel.
IMPORTANT
To help stabilize an outdoor unit, some installations may
require strapping the unit to the pad using brackets and
anchors commonly available in the marketplace.
WARNING
To prevent personal injury, or damage to panels, unit or
structure, be sure to observe the following:
While installing or servicing this unit, carefully stow all
removed panels out of the way, so that the panels will not
cause injury to personnel, nor cause damage to objects or
structures nearby, nor will the panels be subjected to
damage (e.g., being bent or scratched).
While handling or stowing the panels, consider any
weather conditions, especially windy conditions, that may
cause panels to be blown around and battered.

Page 13
XP16
LOUVERED PANEL REMOVAL
Remove the louvered panels as follows:
1.Remove two screws, allowing the panel to swing open
slightly.
2.Hold the panel firmly throughout this procedure. Rotate bot-
tom corner of panel away from hinged corner post until low-
er three tabs clear the slots as illustrated in detail B.
3.Move panel down until lip of upper tab clears the top slot in
corner post as illustrated in detail A.
LOUVERED PANEL INSTALLATION
Position the panel almost parallel with the unit as illustrated
in detail D with the screw side as close to the unit as pos-
sible. Then, in a continuous motion:
1. Slightly rotate and guide the lip of top tab inward as il-
lustrated in detail A and C; then upward into the top
slot of the hinge corner post.
2. Rotate panel to vertical to fully engage all tabs.
3. Holding the panel’s hinged side firmly in place, close
the right−hand side of the panel, aligning the screw
holes.
4. When panel is correctly positioned and aligned, insert
the screws and tighten.
DETAIL A
DETAIL B
ROTATE IN THIS DIRECTION;
THEN DOWN TO REMOVE
PANEL
SCREW
HOLES
LIP
IMPORTANT! DO NOT ALLOW PANELS TO HANG ON UNIT BY TOP TAB. TAB IS FOR
ALIGNMENT AND NOT DESIGNED TO SUPPORT WEIGHT OF PANEL.
PANEL SHOWN SLIGHTLY ROTATED TO ALLOW TOP TAB TO EXIT (OR
ENTER) TOP SLOT FOR REMOVING (OR INSTALLING) PANEL.
MAINTAIN MINIMUM PANEL ANGLE (AS CLOSE TO PARALLEL WITH THE UNIT
AS POSSIBLE) WHILE INSTALLING PANEL.
PREFERRED ANGLE
FOR INSTALLATION
ANGLE MAY BE TOO
EXTREME
HOLD DOOR FIRMLY TO THE HINGED
SIDE TO MAINTAIN
FULLY−ENGAGED TABS
Detail C
Figure 7. Removing and Installing Panels

Page 14 XP16
New or Replacement Line Set
REFRIGERANT LINE SET
This section provides information on installation or
replacement of existing line set. If new or replacement line
set is not being installed then proceed to Brazing
Connections on page 16.
IMPORTANT
Lennox highly recommends changing line set when
converting the existing system from HCFC−22 to
HFC−410A.If that is not possible and the line set is the
proper size as reference in table 2, use the procedure
outlined under Flushing the System on page 13.
If refrigerant lines are routed through a wall, then seal and
isolate the opening so vibration is not transmitted to the
building. Pay close attention to line set isolation during
installation of any HVAC system. When properly isolated
from building structures (walls, ceilings. floors), the
refrigerant lines will not create unnecessary vibration and
subsequent sounds. See figure 8 for recommended
installation practices. Also, consider the following when
placing and installing a high−efficiency outdoor unit.
Liquid lines that meter the refrigerant, such as RFC1 liquid
lines, must not be used in this application. Existing line set of
proper size as listed in table 2 may be reused. If system was
previously charged with HCFC−22 refrigerant, then existing
line set must be flushed (see Flushing the System on page
19).
Field refrigerant piping consists of liquid and vapor lines from
the outdoor unit to the indoor unit coil (braze connections).
Use Lennox L15 (sweat, non−flare) series line set, or
field−fabricated refrigerant line sizes as listed in table 2.
Table 2. Refrigerant Line Set  Inches (mm)
Model
Valve Field
Connections Recommended Line Set
Liquid
Line
Vapor
Line
Liqui
d
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)
1−1/8 in.
(29 mm)
3/8 in.
(10
mm)
1−1/8 in.
(29 mm)
Field
Fabricated
NOTE  When installing refrigerant lines longer than 50
feet, see the Lennox Refrigerant Piping Design and
Fabrication Guidelines, CORP. 9351−L9, or contact Lennox
Technical Support Product Applications for assistance.
To obtain the correct information from Lennox, be sure to
communicate the following information:
DModel (XP16) and size of unit (e.g. −036).
DLine set diameters for the unit being installed as listed
in table 2 and total length of installation.
DNumber of elbows vertical rise or drop in the piping.
The compressor is charged with sufficient Polyol ester oil for
line set lengths up to 50 feet. Recommend adding oil to
system based on the amount of refrigerant charge in the
system. No need to add oil in system with 20 pounds of
refrigerant or less. For systems over 20 pounds − add one
ounce of every five pounds of refrigerant.
Recommended topping−off POE oils are Mobil EAL ARCTIC
22 CC or ICI EMKARATEtRL32CF.
WARNING
Polyol Ester (POE) oils used with HFC−410A
refrigerant absorb moisture very quickly. It is very
important that the refrigerant system be kept closed as
much as possible. DO NOT remove line set caps or
service valve stub caps until you are ready to make
connections.
IMPORTANT
Mineral oils are not compatible with HFC−410A.If oil must
be added, it must be a Polyol Ester oil.

Page 15
XP16
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 materi-
al 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)
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.
NON−CORROSIVE
METAL SLEEVE
NON−CORROSIVE
METAL SLEEVE
8 FEET (2.43 METERS)
Figure 8. Line Set Installation

Page 16 XP16
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 17
XP16
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
HIGH
LOW
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 18 XP16
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 will result if you do not wrap a water
saturated cloth around both liquid and suction line
service valve bodies and copper tube stub while
brazing in the line set! The braze, when complete,
must be quenched with water to absorb any
residual heat.
2. Do not open service valves until refrigerant lines
and indoor coil have been leak−tested and
evacuated. Refer to procedures provided in this
supplement.
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 19
XP16
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
assembly.
CUsing two wrenches, disconnect liquid line from liquid line orifice
housing. Take care not to twist or damage distributor tubes during this
process.
DRemove and discard fixed orifice, valve stem assembly if present and
Teflon®washer as illustrated above.
EUse a field−provided fitting to temporary 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 HCFC−22
CYLINDER CONTAINS
CLEAN HCFC−22 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 down to
0 the system.
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
Figure 11. Installing Indoor Expansion Valve

Page 20 XP16
Installing Indoor Metering Device
This outdoor unit is designed for use in systems that use
check expansion valve metering devices at the indoor coil.
See the Lennox XP16 Engineering Handbook for approved
expansion valve kit match−ups. The expansion valve unit
can be installed internal or external to the indoor coil. In
applications where an uncased coil is being installed in a
field−provided plenum, install the expansion valve in a
manner that will provide access for field servicing of the
expansion valve. Refer to below illustration for reference
during installation of expansion valve unit.
AAttach 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.
BConnect 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.
TWO PIECE
PATCH PLATE
(UNCASED
COIL ONLY)
VAPOR
LINE
LIQUID LINE
ORIFICE
HOUSING
DISTRIBUTOR
TUBES
LIQUID LINE
MALE EQUALIZER LINE
FITTING (SEE
EQUALIZER LINE
INSTALLATION FOR
FURTHER DETAILS)
SENSING
LINE
EQUALIZER
LINE
CHECK
EXPANSION
VALVE
TEFLON®
RING
(Uncased Coil Shown)
Sensing bulb insulation is required if
mounted external to the coil casing. sensing
bulb installation for bulb positioning.
STUB
END
TEFLON®
RING
LIQUID LINE
ASSEMBLY WITH
BRASS NUT
DISTRIBUTOR
ASSEMBLY
ARemove the field−provided fitting that temporary
reconnected the liquid line to the indoor unit’s distributor
assembly.
BInstall 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.
CAttach 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.
DPlace 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.
EAttach 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.
ON 7/8" AND LARGER LINES,
MOUNT SENSING BULB AT
EITHER THE 4 OR 8 O’CLOCK
POSITION. NEVER MOUNT ON
BOTTOM OF LINE.
12
ON LINES SMALLER THAN
7/8", MOUNT SENSING
BULB AT EITHER THE 3 OR
9 O’CLOCK POSITION.
12
BULB
VAPOR LINE
VAPOR LINE
NOTE  NEVER MOUNT ON BOTTOM OF LINE.
BULB
BULB
BULB
VAPOR LINE
FLARE NUT
COPPER FLARE
SEAL BONNET
MALE BRASS EQUALIZER
LINE FITTING
FLARE SEAL CAP
OR
1
2
3
4
5
6
7
8
9
10
11 12
1/2 Turn
SENSING BULB INSTALLATION
EQUALIZER LINE INSTALLATION
1
2
3
4
5
6
7
8
9
10
11 12
1/8 Turn
ARemove 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.
BRemove 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.
INDOOR EXPANSION VALVE INSTALLATION
Figure 12. Installing Indoor Expansion Valve