Allied 4SHP22LX User manual

508401-01 Issue 2322 Page 1 of 106
SERVICE MANUAL
4SHP22LX
(P) 508401-01
*P508401-01*
Table of Contents
Technical Specications ..............................................2
Parts Arrangement.......................................................5
General........................................................................8
Installation ...................................................................8
Operating Gauge Set.................................................10
New or Replacement Line Set...................................12
Electrical - Circuit Sizing and Wire Routing...............22
Thermostat Control and Low Voltage Control Wiring 22
Outdoor Unitary Control.............................................27
Unit Operation ...........................................................29
Defrost Function ........................................................30
Defrost Test ...............................................................30
Servicing Units Delivered Void of Charge..................33
Start-Up .....................................................................33
System Operation and Service..................................34
Unit Selection Code for Outdoor Control...................50
Conguring Unit.........................................................54
System Overview.......................................................55
Defrost Function ........................................................55
Maintenance..............................................................57
Unit Wiring Diagram ..................................................58
Unit Sequence of Operation ......................................59
Component Testing....................................................63
System Conguration ................................................81
Cooling Operation Mode Jumper...............................82
Heating Operation Mode Jumper ..............................82
Unit Operation ...........................................................82
Defrost Function ........................................................84
6-Pin Sensor Harness (DIS, AMB, COIL)..................87
4-Pin Suction Temperature Sensor / Liquid Temperature
Sensor Harness.........................................................87
System Refrigerant..................................................101
Charge Mode Jumper..............................................101
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
CAUTION
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer (or
equivalent), service agency or the gas supplier.
WARNING

508401-01Issue 2322Page 2 of 106
Technical Specications
MODEL NUMBER GUIDE
MINOR REVISION CODE
MAJOR REVISION CODE
1-PHASE, 60 Hz
TONNAGE
24, 36, 48, 60
REGION RESTRICTIONS
1 = STANDARD MODEL
REFRIGERANT
4 = R410A
SHP
SPLIT HEAT PUMP
NOMINAL SEER
22
TIER
LX: LOUVERED VARIABLE
CAPACITY W/ COMFORT SYNC®
4SHP 22 LX 136 P- 51 A
UNIT DIMENSIONS (IN.)
Model
Dimensions (inch) Shipping Weight
(Lbs.)
A -
Width
B -
Depth
C -
Height
4SHP22LX124P-51A 38.88 36.88 38.25 250
4SHP22LX136P-51A 38.88 36.88 38.25 255
4SHP22LX148P-51A 38.88 36.88 43.75 358
4SHP22LX160P-51A 38.88 36.88 43.75 361
NOTE: Dimensions listed are unit sizes w/o packaging
Weights listed are unit weights with packaging
PHYSICAL AND ELECTRICAL DATA
Model Voltage/Hz/Phase Voltage
Range
Min.
Circuit
Amp.
Max. Over
Current
Device
(amps)
Compressor Outdoor Fan Motor
Input (amps)
Full
Load
(amps)
Rated
HP Nom. RPM
4SHP22LX124P-51A 208-230/60/1 197-253 13.4 20 8.6 2.6 1/3 VAR. SPD
4SHP22LX136P-51A 208-230/60/1 197-253 19.9 30 13.9 2.6 1/3 VAR. SPD
4SHP22LX148P-51A 208-230/60/1 197-253 24.6 40 17.6 2.6 1/3 VAR. SPD
4SHP22LX160P-51A 208-230/60/1 197-253 33.5 50 24.7 2.6 1/3 VAR. SPD

508401-01 Issue 2322 Page 3 of 106
REFRIGERATION DATA
Model
Refrig.
Charge
(oz.) *
TXV Refrigerant Line Size Outdoor Unit
Connection Indoor Unit Connection
Suction Liquid Suction Liquid Suction Liquid
4SHP22LX124P-51A 176 H4TXV01 3/4 3/8 3/4 3/8 3/4 3/8
4SHP22LX136P-51A 182 H4TXV02 7/8 3/8 7/8 3/8 7/8 3/8
4SHP22LX148P-51A 172 H4TXV03 7/8 3/8 7/8 3/8 7/8 3/8
4SHP22LX160P-51A 217 H4TXV03 1-1/8 3/8 1-1/8 3/8 7/8 3/8
* Factory charged for 15 feet of line set; adjust per installation instructions
NOTE: Refrigerant charge also varies with indoor unit; refer to refrigerant charge label
SOUND RATINGS
Model
Sound
Power1
(Low)
Estimated Sound Pressure (dBA)2
Sound
Power1
(High)
Estimated Sound Pressure (dBA)2
Approximate Distance3Approximate Distance3
One Meter
(3.3 feet)
Two Meters
(6.6 feet)
Three Meters
(9.8 feet)
One Meter
(3.3 feet)
Two Meters
(6.6 feet)
Three Meters
(9.8 feet)
4SHP22LX124P-51A 63 55 49 45 71 63 57 53
4SHP22LX136P-51A 61 53 47 43 74 66 60 56
4SHP22LX148P-51A 66 58 52 48 72 64 58 54
4SHP22LX160P-51A 64 56 50 46 77 69 63 59
1 Rated in accordance with AHRI standard 270 (2015)
2 Rated in accordance with AHRI standard 275 (2010)
3 Based only on distance factor; other factors may change this value such as:
Unit location (reflective surfaces adjacent to the unit)
Barrier shielding sources
Sound path/elevation
Outside noise sources
COOLING PERFORMANCE WITH DTC1
Outdoor Model
Indoor
Model Cooling Heating
High
CFM
Med
CFM
Low
CFM
Evap.
Coil or Air
Handler³
SEER2 EER2
AHRI
Rated
Capacity²
Sensible
Capacity HSPF2
47° 17°
Btuh COP Btuh COP
4SHP22LX124P-51A BCE7S30M 21.0 13.5 24,000 19,000 9.0 22,400 3.90 14,300 2.80 800 500 350
4SHP22LX136P-51A BCE7S36M 20.0 12.0 34,200 27,000 9.0 33,400 3.40 22,800 2.60 1170 750 415
4SHP22LX148P-51A BCE7S60M 19.5 12.0 47,000 36,500 8.5 44,500 3.50 27,200 2.35 1600 1000 770
4SHP22LX160P-51A BCE7S60M 19.0 12.0 55,000 41,500 8.7 55,500 3.30 37,000 2.40 1800 1100 920
Note:
1 DTC = Designated tested combination
2 Certified in accordance with Unitary Air Conditioner Certification Program, which is based on AHRI Standard 210/240
3 A blower time delay relay is standard on all Allied Air Enterprises furnace and air handler products
NOTE:
For the latest AHRI system matches, please visit
www.alliedratings.com or www.AHRIdirectory.org

508401-01Issue 2322Page 4 of 106
ACCESSORIES
Description Where Used Kit Number
H4TXV01 (TXV Kit) 24 1.851363
H4TXV02 (TXV Kit) 36 1.851364
H4TXV03 (TXV Kit) 48, 60 1.851365
Freezestat 3/8 tubing 93G35
Crankcase Heater All models Factory Installed
Sound Cover All models Factory Installed
Loss of Charge Kit All models Factory Installed
Comfort Sync® Thermostat All Models 1.841226
Comfort Sync® Zoning Controller All models 1.851399
Comfort Sync® Zone Sensor All Models 1.851422
Discharge Temperature Sensor All models 88K38
FAN BLADE SPECS
4SHP22LX Fan Blade
Dia. #of Blades Pitch Part #
24 26" 3 28 100017-02
36, 48, 60 26" 3 20 100017-03

508401-01 Issue 2322 Page 5 of 106
Parts Arrangement
Figure 1. Parts Arrangement - Control Panel
CONTROL PANEL
-24, -36
CONTROL PANEL
-48, -60
OUTDOOR
CONTROL
INVERTER
REACTOR
DC INVERTER
CONTROL
GROUND LUG
CONTACTOR –
SPST
OUTDOOR
CONTROL
INVERTER
REACTOR
DC INVERTER
CONTROL
GROUND LUG
CONTACTOR –
SPST

508401-01Issue 2322Page 6 of 106
Figure 2. Component Locations – 4SHP22LX124 and -36

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Figure 3. Component Locations 4SHP22LX148 and -60 (Scroll Compressor Models)

508401-01Issue 2322Page 8 of 106
Electric shock hazard.
Can cause injury or death. Before attempting
to perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
WARNING
General
Read this entire instruction manual, as well as the
instructions supplied in separate equipment, before
starting the installation. Observe and follow all warnings,
cautions, instructional labels, and tags. Failure to comply
with these instructions could result in an unsafe condition
and/or premature component failure.
These instructions are intended as a general guide only
for use by qualied personnel and do not supersede any
national or local codes in any way. The installation must
comply with all provincial, state, and local codes as well as
the National Electrical Code (U.S.) or Canadian Electrical
Code (Canada). Compliance should be determined prior
to installation.
This unit uses R-410A, which is an ozone-friendly HFC
refrigerant. The unit must be installed with a matching
indoor coil and line set. A lter drier approved for use with
R-410A is installed in or provided along with the unit.
IMPORTANT: This product has been designed and
manufactured to meet ENERGY STAR criteria for energy
eciency when matched with appropriate coil components.
However, proper refrigerant charge and proper air ow
are critical to achieve rated capacity and eciency.
Installation of this product should follow the manufacturer’s
refrigerant charging and air ow instructions. Failure to
conrm proper charge and airow may reduce energy
eciency and shorten equipment life.
Inspection of Shipment
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted
on the carrier’s freight bill. Take special care to examine
the unit inside the carton if the carton is damaged. Any
concealed damage discovered should be reported to the
last carrier immediately, preferably in writing, and should
include a request for inspection by the carrier’s agent.
If any damages are discovered and reported to the carrier
DO NOT INSTALL THE UNIT, as claim may be denied.
Check the unit rating plate to conrm specications are as
ordered.
Safety Precautions
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations.
Have re extinguisher available. Read these instructions
thoroughly and follow all warning or cautions attached to
the unit.
1. Always wear proper personal protection equipment.
2. Always disconnect electrical power before removing
panel or servicing equipment.
3. Keep hands and clothing away from moving parts.
4. Handle refrigerant with caution; refer to proper MSDS
from refrigerant supplier.
5. Use care when lifting, avoid contact with sharp edges.
Installation
NOTE: In some cases, noise in the living area has been
traced to gas pulsations from improper installation of
equipment.
• Locate unit away from windows, patios, decks, etc.
where unit operation sounds may disturb customer.
• Leave some slack between structure and unit to
absorb vibration.
• Place a sound-absorbing material, such as Isomode,
under the unit if it will be installed in a location or
position that will transmit sound or vibration to the
living area or adjacent buildings.
• Install the unit high enough above the ground or roof to
allow adequate drainage of defrost water and prevent
ice buildup.
• In heavy snow areas, do not locate the unit where
drifting snow will occur. The unit base should be
elevated above the depth of average snows.
NOTE: Elevation of the unit may be accomplished
by constructing a frame using suitable materials. If a
support frame is constructed, it must not block drain
holes in unit base.
• When installed in areas where low ambient
temperatures exist, locate unit so winter prevailing
winds do not blow directly into outdoor coil.
• Locate unit away from overhanging roof lines which
would allow water or ice to drop on, or in front of, coil
or into unit.
When outdoor unit is connected to factory-approved indoor
unit, outdoor unit contains system refrigerant charge for
operation with matching indoor unit when connected by 15
ft. of eld-supplied tubing. For proper unit operation, check
refrigerant charge using charging information located on
control box cover.

508401-01 Issue 2322 Page 9 of 106
Outdoor Section
Zoning ordinances may govern the minimum distance the
condensing unit can be installed from the property line.
Install on a Solid, Level Mounting Pad
The outdoor section is to be installed on a solid foundation.
This foundation should extend a minimum of 2” (inches)
beyond the sides of the outdoor section. To reduce the
possibility of noise transmission, the foundation slab
should NOT be in contact with or be an integral part of the
building foundation. See Figure 4.
If conditions or local codes require the unit be attached to
pad or mounting frame, tie down bolts should be used and
secured to unit base pan.
Discharge Air
Mounting Slab
Ground Level
Building
Structure
Mounting slab must slope slightly away from
building, not to exceed 1/4” per foot.
Figure 4. Slab Mounting
Elevate Unit
Accumulation of water and ice in base pan may cause
equipment damage.
CAUTION
Elevate unit per local climate and code requirements to
provide clearance above estimated snowfall level and
ensure adequate drainage of unit. Use snow stand in areas
where prolonged freezing temperatures are encountered.
If conditions or local codes require the unit be attached to
pad or mounting frame, tie down bolts should be used and
fastened through knockouts provided in unit base pan.
Clearance Requirements
When installing, allow su󰀩cient space for airow clearance,
wiring, refrigerant piping, and service. For proper airow,
quiet operation and maximum e󰀩ciency. Position so water,
snow, or ice from roof or eaves cannot fall directly on unit.
Refer to Table 1 for installation clearances.
Location Minimum Clearance
Service box 30”
Top of unit* 48”
Between units 24”
Against wall 6”
* Maximum so󰀩t overhang is 36”.
NOTE: At least one side should be unobstructed by a wall or
other barrier.
Table 1. Clearances
30” around
Control
Box
24”
6”*
Figure 5.
NOTE: See Table 1 for specic minimum clearance guidelines.
DO LOCATE THE UNIT:
• With proper clearances on sides and top of unit
• On a solid, level foundation or pad (unit must be level
to within ± 1/4 in./ft. per compressor manufacturer
specications)
• To minimize refrigerant line lengths
DO NOT LOCATE THE UNIT:
• On brick, concrete blocks or unstable surfaces
• Near clothes dryer exhaust vents where debris
accumulates
• Near sleeping area or near windows
• Under eaves where water, snow or ice can fall directly
on the unit
• With clearance less than 2 ft. from a second unit
• With clearance less than 4 ft. on top of unit
Operating Ambient
The minimum outdoor operating ambient in cooling mode
is 55°F, and the maximum outdoor operating ambient in
cooling mode is 125°F. The maximum outdoor operating
ambient in heating mode is 66°F.

508401-01Issue 2322Page 10 of 106
Rooftop Installations
Install unit at a minimum of 6” above surface of the roof
to avoid ice buildup 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 cannot be mounted away from prevailing winds, a
wind barrier should be constructed. Due to variation in
installation applications, size and locate barrier according
to the best judgment of the installer.
This unit must be matched with an indoor coil as
specied in the unit Product Specications. Coils
previously charged with HCFC-22 must be ushed.
IMPORTANT
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
CAUTION
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.
IMPORTANT
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.
WARNING
The 4SHP22LX is a high e󰀩ciency residential split-system
heat pump unit that is approved for use with HFC 410A
refrigerant. The 4SHP22LX124 and -36 use a 380VAC three
phase variable capacity rotary compressor specically
designed for unitary splits system. The 4SHP22LX148
and -60 units use a 380VAC three phase variable capacity
scroll compressor. The series is designed for use with an
expansion valve only (approved for use with HFC-410A) in
the indoor unit.
Operating Gauge Set
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 HVAC components, ensure
the fasteners are appropriately tightened. Table 2 shows
torque values for fasteners.
Fastener Torque
Valve Stems 4 in. lbs.
Stem Caps 8 ft. lbs.
Service Port Caps 8 ft. lbs.
Sheet Metal Screws 16 in. lbs.
#8 Machine Screws 16 in. lbs.
#10 Machine Screws 28 in. lbs.
Compressor Bolts 90 in. lbs.
Table 2. Torque Table
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and tted
snugly over the cap before tightening.
IMPORTANT
Only use Allen wrenches of su󰀩cient 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 o󰀨 the wrench, or stripping the valve stem
recess.
IMPORTANT
Using Manifold Gauge Set
When checking the system charge, only use a manifold
gauge set that features low loss anti-blow back ttings.
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

508401-01 Issue 2322 Page 11 of 106
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, ushing, leak testing, evacuating,
checking charge and charging. Each valve is equipped
with a service port which has a factory-installed valve stem.
Liquid and Suction Line Service Valves
The liquid line and suction line service valves (see Figure
6) and service ports are used for leak testing, evacuation,
charging, and checking charge.
Each valve is equipped with a service port which has a
factory-installed Schrader valve. A service port cap protects
the Schrader valve from contamination and serves as the
primary leak seal.
Figure 6.
To Access the Schrader Port:
1. Remove the service port cap with an adjustable
wrench.
2. Connect gauge to the service port.
3. When testing is completed, replace service port cap.
Tighten nger tight, then an additional 1/6 turn.
To Open Liquid or Suction Line Service Valve:
1. Remove stem cap with an adjustable wrench.
2. Use service wrench with a hex-head extension to back
the stem out counterclockwise as far as it will go. Use a
3/16” hex head extension for liquid line service valves
and a 5/16” extension for suction line service valves.
3. Replace the stem cap. Tighten nger tight, then tighten
an additional 1/6 turn.
To Close Liquid or Suction Line Service Valve:
1. Remove the stem cap with an adjustable wrench.
2. Use a service wrench with a hex-head extension to
turn the stem clockwise to seat the valve. Tighten
rmly.
3. Replace the stem cap. Tighten nger tight, then tighten
an additional 1/6 turn.
Suction Line (Ball Type) Service Valve
Suction line (ball type) service valves function the same
way as the other valves; the di󰀨erence is in the construction
(see Figure 7).
The ball valve is equipped with a service port with a factory-
installed Schrader valve. A service port cap protects the
Schrader valve from contamination and serves as the
primary seal.
Figure 7.

508401-01Issue 2322Page 12 of 106
New or Replacement Line Set
CAUTION
If this unit is being matched with an approved line set
or indoor unit coil that 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 ushed prior to installation. Take
care to empty all existing traps. Polyvinyl ether (PVE)
and polyolester (POE) oils are used in Allied variable-
capacity 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 system performance and capacity.
Failure to properly ush the system per this instruction
and the detailed Installation and Service Procedures
manual will void the warranty.
Flush the existing line set per the following instructions.
For more information, refer to the Installation and Service
Procedures manual.
CAUTION
DO NOT attempt to ush and re-use existing line sets
or indoor coil when the system contains contaminants
(i.e., compressor burn out).
For -024 and -036 units: Polyvinyl ether (PVE) oil is used
in the variable capacity rotary compressors in -024 and
-036 units. When installing these units with refrigerant
lines or coils previously charged with R410A and POE oil,
it is recommended to ush the existing lines and coil with
R410A refrigerant to remove excess POE oil that may be
in the system.
For -048 and -060 units: Polyol ester (POE) oils is used in
the variable capacity scroll compressors in -048 and -060
units. When installing these units with refrigerant lines
or coils previously charged with R410A and POE oil, the
existing lines do NOT need to be ushed to remove the
POE oil.
If a new line set is being installed, size the piping per Table
3.
Suction Traps
For systems with the outdoor unit 5 - 60 feet above the
indoor unit, one trap must be installed at the bottom of the
suction riser.
NOTE: Special consideration must be taken for line sets
over 50 feet. See Refrigerant Piping Guidelines.
WARNING
When using a high pressure gas such
as 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).
WARNING
Refrigerant can be harmful if it is inhaled. Refrigerant
must be used and recovered responsibly.
Failure to follow this warning may result in personal
injury or death.
WARNING
Fire, Explosion and Personal Safety
hazard.
Failure to follow this warning could
result in damage, personal injury or
death.
Never use oxygen to pressurize or
purge refrigeration lines. Oxygen,
when exposed to a spark or open
ame, can cause re and/or an
explosion, that could result in property
damage, personal injury or death.
WARNING
Polyvinyl ether (PVE) 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.

508401-01 Issue 2322 Page 13 of 106
• Up to 50 Linear Feet: Use rated line sizes listed in
Table 3.
• Between 51 and 150 Linear Feet: Crankcase heater
and nonbleed port TXV factory installed. No additional
components required. Vertical vapor riser must be
sized to the vapor riser listed in the Table 4 on systems
with line sets longer than 51 feet. Use Table 4 and
Table 5 to determine the correct liquid and vapor line
sizes.
• Over 150 Linear Feet: not recommended.
• Additional oil is not required for systems with line
lengths up to 150 feet.
Heat Pump System (HFC410A)
• Total equivalent length equals 180 feet (piping and all
ttings included).
NOTE: Length is general guide. Lengths may be
more or less, depending on remaining system design
factors.
• Maximum linear (actual) length = 150 feet.
• Maximum linear liquid lift = 60 feet.
NOTE: Maximum lifts are dependent on total length,
number of elbows, etc. that contribute to total pressure
drop.
• Maximum length vapor riser = 60 feet.
Tonnage * Valve Size Connections Recommended Line Sets
Liquid Line Suction Line Line Set Length
-24
3/8” (10mm)
3/4” (19mm) 30’ (9.1m)
-36 7/8” (22mm) 40’ (12.2m)
-48 50’ (15.2m)
-60 1-1/8” (29mm) ** Field-fabricated
* Applicable to all minor revision numbers unless otherwise specied.
** Some applications may require a eld-provided 1-1/8” to 7/8” adapter.
Table 3. Standard Refrigerant Line Set – Up to 50 Linear Feet in Length
Tonnage
Maximum Total
Equivalent
Length (ft)
Maximum Linear
(actual) Length
(ft)
Maximum Vapor
Riser (ft)
Maximum Linear
Liquid Lift (ft)
Preferred Vapor
Line Sizes for
Horizontal Runs
Required Vapor
Riser Size
-24
180 150 60 60 7/8”
5/8”
-36 3/4”
-48 7/8”
-60
Table 4. Line Set Guidelines – 51 to 150 Linear Feet in Length
Tonnage Line SIze Total Linear Length (ft.)
25 50 75 100 125 150
-24 3/8” 25 50 60 60 60 60
Max Elevation (ft)
-36 3/8” 25 50 60 56 51 45
1/2” 25 50 60 60 60 60
-48 3/8” 25 50 50 41 31 22
1/2” 25 50 60 60 60 60
-60 3/8” 25 50 36 22 8 NR
1/2” 25 50 60 60 60 59
NOTE: Shaded rows indicate rated liquid line size.
A. Find your tonnage on the left side of the table.
B. Start with the rated liquid line size (shaded row) on the outdoor tonnage.
C. Select the actual Total Linear Length of your system shown at the top of the table.
D. The elevation listed in the table is the maximum allowed for the liquid line listed.
E. Select or consider the larger liquid line size shown in the table if the elevation does not meet your requirements.
Table 5. Liquid Line Diameter Selection

508401-01Issue 2322Page 14 of 106
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
temperature of 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.

508401-01 Issue 2322 Page 15 of 106
Typical Existing Fixed Orice Removal
Procedure
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)
Figure 8. Remove Fixed Orice
(Uncased Coil Shown)
1. On fully cased coils, remove the coil access and
plumbing panels.
2. Remove any shipping clamps from the liquid line and
distributor assembly.
3. Using two wrenches (one to hold the orice housing
and one to remove the brass nut), disconnect liquid
line from liquid line orice housing. Take care not to
twist or damage distributor tubes during this process.
4. Remove and discard xed orice, valve stem assembly
(if present) and Teon® washer, as shown in Figure 8.
5. Use a eld-provided tting to temporarily reconnect the
liquid line to the indoor unit’s liquid line orice housing.
Typical Existing Expansion Valve Removal
Procedure
SENSING
LINE
TWO-PIECE PATCH PLATE
(UNCASED COIL ONLY)
VAPOR
LINE
DISTRIBUTOR
ASSEMBLY
DISTRIBUTOR
TUBES
LIQUID
LINE
MALE EQUALIZER
LINE FITTING
EQUALIZER
LINE
EXPANSION
VALV E
TEFLON®
RING
STUB END
TEFLON®
RING
SENSING BULB
LIQUID LINE
ORIFICE
HOUSING
LIQUID LINE
ASSEMBLY WITH
BRASS NUT
Figure 9. Remove Expansion Valve
(Uncased Coil Shown)
1. On fully cased coils, remove the coil access and
plumbing panels.
2. Remove any shipping clamps from the liquid line and
distributor assembly.
3. Disconnect the equalizer line from the tting on the
vapor line.
4. Remove the vapor line sensing bulb.
5. Disconnect the liquid line from the expansion valve at
the liquid line assembly.
6. Disconnect the expansion valve from the liquid line
orice housing. Take care not to twist or damage
distributor tubes during this process.
7. Remove and discard expansion valve and the two
Teon® rings.
8. Use a eld-provided tting to temporarily reconnect the
liquid line to the indoor unit’s liquid line orice housing.
Connect Gauges and Equipment for Flushing
Procedure
LOW HIGH
EXISTING
INDOOR
UNIT
GAUGE
MANIFOLD
CYLINDER CONTAINING
CLEAN R-410A TO BE
USED FOR FLUSHING
(Positioned to deliver liquid
refrigerant)
LIQUID LINE SERVICE
VALVE
INLET
DISCHARGE
TANK
RETURN
CLOSED
OPENED
RECOVERY
CYLINDER
RECOVERY MACHINE
NEW
OUTDOOR
UNIT
VAPOR LINE
SERVICE VALVE
VAPOR
LIQUID
1
1
2
3
4
Figure 10. Connecting Gauges
1. Cylinder with clean R-410A (positioned to deliver liquid
refrigerant) to the vapor service valve.
2. Refrigerant gauge set (low side) to the liquid line valve.
3. Refrigerant gauge set center port to inlet on the
recovery machine with an empty recovery tank
connected to the gauge set.
4. Connect recovery tank to recovery machine per
machine instructions.

508401-01Issue 2322Page 16 of 106
Flushing Line Sets
If the unit will be installed in an existing system that uses
an indoor unit or line sets charged with R-22 refrigerant,
installer must perform the following ushing procedure.
NOTE: Existing system components (including line set
and indoor coil) must be an AHRI match with the unit in
order to fulll unit warranty requirements.
Fire, Explosion and Personal Safety
hazard. Failure to follow this warning
could result in damage, personal injury or
death.
Never use oxygen to pressurize or
purge refrigeration lines. Oxygen, when
exposed to a spark or open ame, can
cause re and/or an explosion, that could
result in property damage, personal injury
or death.
WARNING
When using a high pressure gas such as
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).
WARNING
Refrigerant must be reclaimed in accordance with
national and local codes.
WARNING
1. Set the recovery machine for liquid recovery and start
the recovery machine. Open the gauge set valves to
allow the recovery machine to pull a vacuum on the
existing system line set and indoor unit coil.
2. Position the cylinder of clean R-410A for delivery of
liquid refrigerant and open its valve to allow liquid
refrigerant to ow 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.
3. After all of the liquid refrigerant has been recovered,
switch the recovery machine to vapor recovery so
that all of the R-410A vapor is recovered. Allow the
recovery machine to pull the system down to 0.
4. Close the valve on the inverted R-410A drum and the
gauge set valves. Pump the remaining refrigerant out
of the recovery machine and turn the machine o󰀨.
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 that 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 ushed prior to installation. Take
care to empty all existing traps. Polyvinyl ether (PVE)
oils are used in Allied variable-capacity 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
system performance and capacity. Failure to properly
ush the system per this instruction and the detailed
Installation and Service Procedures manual will void
the warranty.

508401-01 Issue 2322 Page 17 of 106
Refrigerant Piping - Install Indoor Expansion Valve
This outdoor unit is designed for use in systems that include a heat pump expansion valve metering device at the indoor
coil. See the Product Specications for approved expansion valve kit match-ups and application information. 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 eld-provided plenum, install the expansion valve in a manner that will provide access for future eld service of the
expansion valve. Refer to below illustration for reference during installation of expansion valve unit.
1 -Attach the vapor line sensing bulb in the proper
orientation as illustrated to the right using the clamp and
screws provided.
NOTE - Though it is preferred to have the sensing bulb
installed on a horizontal run of the vapor line, installation
on a vertical run of piping is acceptable if necessary.
NOTE - Confirm proper thermal contact between vapor
line and check/expansion bulb before insulating the
sensing bulb once installed.
2 -Connect the equalizer line from the check 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
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
3 -Install one of the provided Teflon®rings around the
stubbed end of the check expansion valve and lightly
lubricate the connector threads and expose surface of
the Teflon®ring with refrigerant oil.
4 -Attach the stubbed end of the check 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 tighten to
20 ft-lb.
5 -Place the remaining Te flon®washer around the other
end of the check expansion valve. Lightly lubricate
connector threads and expose surface of the Teflon®
ring with refrigerant oil.
6 -Attach the liquid line assembly to the check 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 tighten to 20 ft-lb.
ON 7/8” AND LARGER LINES,
MOUNT SENSING BULB AT
EITHER THE 4 OR 8 O'CLOCK
POSITION.
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 THE SENSING BULB 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
1 -Remove and discard either the flare seal cap or flare nut
with copper flare seal bonnet from the equalizer line port
on the vapor line as illustrated in the figure below.
2 -Remove the field-provided
sembly.
INDOOR EXPANSION VALVE INSTALLATION

508401-01Issue 2322Page 18 of 106
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND VAPOR LINE SERVICE VALVES
OUTDOOR
UNIT
LIQUID LINE
VAPOR LINE
LIQUID LINE SERVICE
VALV E
VAPOR LINE
SERVICE
VALV E
ATTACH
GAUGES
INDOOR
UNIT
VAPOR SERVICE PORT MUST BE OPEN
TO ALLOW EXIT POINT FOR NITROGEN
A -Connect gauge set low pressure side to
liquid line service valve (service port).
B -Connect gauge set center port to bottle of
nitrogen with regulator.
C -Remove core from valve in 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 VALV E.
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
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 vapor and liquid line service
ports.
12
LIQUID LINE SERVICE
VALV E
SERVICE
PORT
CORE
SERVICE PORT
CAP
SERVICE
PORT
CORE
SERVICE
PORT CAP
CUT AND DEBUR
LINE SET SIZE MATCHES
SERVICE VALVE CONNECTION
DO NOT CRIMP SERVICE VALVE
CONNECTOR WHEN PIPE IS
SMALLER THAN CONNECTION
3
VAPOR LINE SERVICE
VALV E
COPPER TUBE
STUB
REFRIGERANT LINE
REDUCER
SERVICE VALVE
CONNECTION
LINE SET SIZE IS SMALLER
THAN CONNECTION
Refrigerant Piping - Brazing Procedures
Before brazing, ensure the system is fully
recovered of all refrigerant. 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
Brazing alloys and ux 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 ux.
WARNING
Use a manifold gauge set designed for use on R-410A
refrigerant systems.
NOTE

508401-01 Issue 2322 Page 19 of 106
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
LIQUID LINE SERVICE VALV E
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.
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
VAPOR LINE
WATER-SATURATED
CLOTH
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.
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
PREPARATION FOR NEXT STEP
7
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 vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set connections.
5
WARNING
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 the line set! The braze, when
complete, must be quenched with water to absorb any
residual heat.
Do not open service valves until refrigerant lines and
indoor coil have been leak-tested and evacuated. Refer
to Leak Test and Evacuation section of this manual.
WARNING
While protecting the
service valve seals with
water-saturated cloths,
ensure that water does
NOT enter the system.

508401-01Issue 2322Page 20 of 106
TO VAPOR
SERVICE VALVE
HFC-410A
MANIFOLD GAUGE SET
OUTDOOR UNIT
HIGH
LOW
1
2
A
B
NITROGEN
NOTE - Position
canister to deliver
liquid refrigerant.
A -With both manifold valves closed, connect the cylinder of HFC-410A refrigerant to the center port of the
manifold gauge set. Open the valve on the HFC-410A cylinder (vapor only).
B - Open the high pressure side of the manifold to allow HFC-410A into the line set and indoor unit. Weigh in
a trace amount of HFC-410A.[A trace amount is a maximum of two ounces (57 g) refrigerant or three
pounds (31 kPa) pressure.] Close the valve on the HFC-410A cylinder and the valve on the high
pressure side of the manifold gauge set. Disconnect the HFC-410A cylinder.
C - Connect a cylinder of nitrogen with a pressure regulating valve to the center port of the manifold gauge
set.
D - Adjust nitrogen pressure to 150 psig (1034 kPa). Open the valve on the high side of the manifold gauge set
in order to pressurize the line set and the indoor unit.
E - After a few minutes, open one of the service valve ports and verify that the refrigerant added to the
system earlier is measurable with a leak detector.
F -
After the line set has been connected to the indoor and outdoor units, check the line set connections and
indoor unit for leaks. Use the following procedure to test for leaks:
A -Connect the high pressure hose of an HFC-410A manifold gauge set to the vapor valve service port.
NOTE - Normally, the high pressure hose is connected to the liquid line port. However, connecting it
to the vapor port better protects the manifold gauge set from high pressure damage.
B - With both manifold valves closed, connect the cylinder of HFC-410A refrigerant to the center port of
the manifold gauge set.
CONNECT GAUGE SET
TEST FOR LEAKS
NOTE - Later in the procedure, the HFC-410A container will be replaced by the nitrogen container.
After leak testing, disconnect gauges from service ports.
NOTE - Service valve cores remain removed for the following evacuation procedure.
LEAK TEST
Leak Test and Evacuation
Evacuating the system of non-condensables is critical for proper operation of the unit. Non-condensables are dened as
any gas that will not condense under temperatures and pressures present during operation of an air conditioning system.
Non-condensables and water suction combine with refrigerant to produce substances that corrode copper piping and
compressor parts.