Allied Air 4SCU20LX User manual

507523-01 Page 1 of 11Issue 1831
Save these instructions for future reference
INSTALLATION INSTRUCTIONS
4SCU20LX UNITS
(R410A REFRIGERANT)
(P) 507523-01
*P507523-01*
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
This manual must be left with the homeowner for future reference.
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.
Improper Installation, adjustment, alteration, service
or maintenance will void the warranty. The qualied
installer or agency must use factory-authorized kits
or accessories when modifying this product. Refer to
the individual instructions packaged with the kits or
accessories when installing.
CAUTION
Installation or repairs made by unqualied persons CAN
result in hazards to you and others. Installation MUST
conform with local building codes and with the National
Electric Code NFPA 70/ANSI C1-1993 or current edition
and Canadian Electrical Code Part 1 CSA.
WARNING
These instructions are intended as a general guide and
do not supersede national, state or local codes in any
way.
These instructions must be left with the property
owner.
NOTE
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label. Electrical
shock can cause personal injury or death.
WARNING
Table of Contents
Safety Precautions ......................................................2
Installation ...................................................................2
Electrical Connections.................................................4
Start-Up Procedure......................................................8
Homeowner’s Information .........................................11

Page 2 of 11 507523-01Issue 1831
These units are designed for use in residential and light
commercial type buildings. Units should be installed with
approved indoor matches listed in the Air-Conditioning,
Heating and Refrigeration Institute (AHRI) Directory of
Certied Products. Refer to http://www.ahridirectory.org.
Before installation, inspect the unit for shipping damage.
This unit is a variable speed system and can only be
installed with “Comfort Sync” Wi-Fi thermostat and
“Comfort Sync” enabled air handler or furnace.
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.
1. Locate unit away from windows, patios, decks, etc.
where unit operation sounds may disturb customer.
2. Ensure that vapor and liquid tube diameters are
appropriate to capacity of unit.
3. Run refrigerant tubes as directly as possible by
avoiding unnecessary turns and bends.
4. Leave some slack between structure and unit to
absorb vibration.
5. When passing refrigerant tubes through the wall, seal
opening with RTV or other silicon-based caulk.
6. Avoid direct tubing contact with water pipes, duct work,
oor joists, wall studs, oors, walls, and any structure.
7. Do not suspend refrigerant tubing from joists and
studs with a rigid wire or strap which comes in direct
contact with tubing.
8. Ensure that tubing insulation is pliable and completely
surrounds suction line.
When outdoor unit is connected to factory-approved indoor
unit, outdoor unit contains system refrigerant charge for
operation with indoor unit of the same size when connected
by 15 ft. of eld-supplied tubing. For proper unit operation,
check refrigerant charge using charging information
located on control box cover.
NOTE: Maximum liquid-line size is 3/8 in. O.D. for all
residential applications including long lines.
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.
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.
Rooftop Installations
Mount on level platform or frame 6 inches above roof
surface. Place unit above a load-bearing wall and isolate
unit and tubing set from structure. Arrange supporting
members to adequately support unit and minimize
transmission of vibration to building. Ensure roof structure
and anchoring method is adequate for location. Consult
local codes governing rooftop applications.
NOTE: Unit must be level to within ± 1/4 in./ft. per
compressor manufacturer specications.
Clearance Requirements
When installing, allow sufcient space for airow clearance,
wiring, refrigerant piping, and service. For proper airow,
quiet operation and maximum efciency. Position so water,
snow, or ice from roof or eaves cannot fall directly on unit.
Figure 1.

507523-01 Page 3 of 11Issue 1831
DO LOCATE THE UNIT:
• With proper clearances on sides and top of unit a
minimum of 12” on the three sides, service side should
be 24” and 48” on top
• On solid, level foundation or pad
• To minimize refrigerant line lengths
DO NOT LOCATE THE UNIT:
• On brick, concrete blocks or unstable surfaces
• Near clothes dryer exhaust vents
• 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
Indoor Coil TXV Selection
The outdoor section must be matched to a factory approved
indoor section. It is mandatory that the installer ensure
that the correct TXV is installed in the indoor section. If
necessary remove the existing piston and replace it with
the correct TXV. See indoor unit instructions for details of
changing the piston or TXV.
The 20 SEER models are only rated with TXV on the
indoor coil.
Refrigeration Line Sets
Use only refrigeration grade copper tubes. Split systems
may be installed with up to 50 ft. of line set (no more than
20 ft. vertical) without special consideration. For lines
longer than 50 ft., refer to long line set guidelines.
If ANY refrigerant tubing is required to be buried by state
or local codes, provide a 6 inch vertical rise at service
valve.
CAUTION
Table 1.
Model
20 SEER
Liquid Line Suction Line
24 3/8 3/4
36 3/8 7/8
48 3/8 7/8
60 3/8 1 1/8
Do not leave the lines open to the atmosphere for any period
of time, moisture, dirt and bugs may contaminate the lines.
Filter Drier
The lter drier is very important for proper system operation
and reliability. If the drier is shipped loose, it must be
installed by the installer in the eld. Unit warranty will be
void, if the drier is not installed.
Installation of Refrigerant Piping
DO NOT fasten liquid or suction lines in direct contact with
the oor or ceiling joist. Use an insulated or suspension
type of hanger. Keep both lines separate, and always
insulate the suction line. Long liquid line runs (30 feet or
more) in an attic will require insulation. Route refrigeration
line sets to minimize length.
DO NOT let refrigerant lines come in direct contact with
foundation. When running refrigerant lines through the
foundation or wall, openings should allow for a sound
and vibration absorbing material to be placed or installed
between tubing and foundation. Any gap between
foundation or wall and refrigeration lines should be lled
with a vibration damping material.
Before making braze connections, be sure all joints are
clean. Before heat is applied for brazing, dry nitrogen
should be owing through the tubing to prevent oxidation
and scale formation on the inside of the tubing.
Always cap line set ends before brazing to prevent moisture
and contaminants.
The following is the recommended method for making
braze connections at the refrigerant line connections.
1. Debur and clean refrigerant tube end with emery cloth
or steel brush.
2. Insert tubing into swage tting connection.
3. Wrap wet rags over valves to protect from heat.
4. Allow dry nitrogen to ow through refrigerant lines.
5. Braze joint, using a suitable brazing alloy for copper to
copper joints.
6. Quench the joint and tubing with water using a wet
rag. Leave rag on tting body and re-wet with water to
help cool area.
7. All copper joints must be brazed not soldered.

Page 4 of 11 507523-01Issue 1831
Leak Check
Never use oxygen to pressurize or purge refrigerant
lines, re or explosion can occur causing injury or
property damage
WARNING
Refrigeration lines and indoor coil must be checked for leaks
after brazing and before evacuation. The recommended
procedure is to apply a trace amount of vapor refrigerant
(approximately two ounces or 3 psig) into the line set and
indoor coil, then pressurize with 150 psig of dry nitrogen.
Use a refrigerant leak detector to check all joints. The
system may also be checked for leaks using a halide torch
or pressure and soapy solution. After completion of leak
check, reclaim all pressure from system before evacuation.
Evacuating and Charging Instructions
It is against the law to release refrigerants into the
atmosphere. Refrigerant can cause injury or death if
inhaled.
WARNING
These outdoor units are pre-charged at the factory with
adequate refrigerant for 15 feet of refrigerant tubing.
1. Connect the vacuum pump to the center hose of the
manifold gauge set, the low-pressure manifold gauge
to the vapor service valve and the high pressure
manifold gauge to the liquid service valve.
2. The valves should be kept in the (closed) position.
This will allow evacuation of the refrigeration lines and
the indoor coil, without disturbing the factory charge in
the outdoor unit.
3. Follow the vacuum pump manufacturer’s instructions.
Allow the pump to operate until the system has been
evacuated down to 300 microns. Allow the pump to
continue running for an additional 15 minutes. Turn
OFF the pump and leave the connections secured
to the two (2) service valves. Hold for 5 minutes, if
the system fails to hold 1000 microns or less, check
all connections for tight t and repeat the evacuation
procedure.
4. Isolate the vacuum pump from the system by closing
the shutoff valves on the gauge-set. Disconnect the
vacuum pump.
5. After evacuation of the connecting lines, fully open the
service valves.
Place service valve cap and torque to:
Valve Size Torque (ft.-lb.)
3/8 Valve 8-11
3/4 Valve 12-15
7/8 Valve 15-20
Table 2. Torque Table
Electrical Connections
Electrical Shock Hazard!
Turn OFF electric power before connecting
unit, performing any maintenance or
removing panels or doors. More than one
disconnect may be required to turn off all
power.
FAILURE TO DO SO COULD RESULT IN
BODILY INJURY OR DEATH.
WARNING
Electric Hazard/High Voltage
Wait 5 minutes after disconnecting power components
may hold electric charge.
WARNING
Be sure to check all local codes to determine that the unit
is installed in accordance with local requirements. Consult
the National Electric Code for wire size requirements. Use
60° C or higher copper wires only. Always provide ground
connections to the outdoor unit. Power supply must agree
with the rating on the unit nameplate.
Provide line voltage power supply to unit from a properly
sized disconnect switch. Route power and ground wires
from disconnect switch to unit. Line voltage connections
are made at the line side of the contactor in the control box
of the outdoor unit. Follow the wiring diagram attached to
inside of the access panel.
Proper circuit protection recommendations are indicated
on Unit Rating Plate. Time delay fuses are required to
prevent blowing due to starting current (the current in rush
when equipment starts is referred to as the Locked Rotor
Amps or LRA).

507523-01 Page 5 of 11Issue 1831
Remove access panel to gain access to unit wiring. Extend
wires from disconnect through power wiring hole provided
and into unit control box. Flexible conduit is required for the
swing out control box feature.
The unit cabinet must have an uninterrupted or unbroken
ground. The ground must be installed in accordance
with all electrical codes. Failure to follow this warning
can result in an injury, re, or death.
WARNING
Connect ground wire to ground connection in control box
for safety. Connect power wiring to contactor.
Ensure the room thermostat is properly installed per
instructions shipped with room thermostat. Generally the
thermostat should not be exposed to sunlight, drafts or
vibration and should not be mounted on exterior walls.
Low voltage wiring must be separated from high voltage
wiring.
WARNING
Low voltage connections should be in accordance to the
wiring diagram.
Alarms
Alarm information is provided on the outdoor unit access
panel and in the Comfort Sync Wi-Fi®Installer’s System
setup Guide.
Outdoor Control Seven-Segment Display and
Push Button
Information concerning the outdoor control seven-segment
display and push button operations are available on the
unit access panel.
System Component Conguration (Outdoor Unit)
All conguration of the outdoor unit is completed using
the Comfort Sync Wi-Fi®thermostat. Please refer to the
Comfort Sync Wi-Fi®Installer’s System setup Guide for
complete details on how to integrate this unit into a Comfort
Sync®-enabled system.
Control Wires
Maximum length of wiring (18 gauge) for all connections
on the RSBus is 1500 feet (457 meters). Wires should
be color-coded, with a temperature rating of 95ºF (35ºC)
minimum, and solid-core (Class II Rated Wiring). All low
voltage wiring must enter unit through eld-provided eld-
installed grommet installed in electrical inlet.
The Comfort Sync Wi-Fi®thermostat requires four
thermostat wires between the thermostat and the furnace /
air handler Comfort Sync®control and four wires between
the outdoor unit and the furnace/air handler Comfort Sync®
control. When a thermostat cable with more than four wires
is used, the extra wires must be properly connected to
avoid electrical noise (Figure 2).
Use a wire nut to bundle the four unused wires at each
end of the cable. Each bundle should also include an
additional wire that should be connected on each end to
the C terminal as shown in Figure 2.
High Voltage and Ground Wires
Any excess high voltage eld wiring should be trimmed
and secured away from any low voltage eld wiring. To
facilitate a conduit, a cutout is located on the bottom of
the control box. Connect conduit to the control box using a
proper conduit tting.

Page 6 of 11 507523-01Issue 1831
Indoor Control
Single Wire To
C Terminal
Unused Wires
Unused Wires
Single Wire To C Terminal
OUTDOOR UNIT
PROVIDED RAST
6-PIN CONNECTOR
CONNECTS TO
RAST 6-PIN
CONNECTOR
ROUTE CONTROL
WIRING THROUGH
GROMMET AND
SECURE WITH
CABLE TIE
GROMMET AND
CABLE TIE.
USE WATERTIGHT
CONDUIT FOR HIGH
VOLTAGE
CONNECT CONDUIT
TO CUTOUT AND
ROUTE HIGH
VOLTAGE WIRING
INDOOR CONTROL
Thermostat
Figure 2. Control Wiring

507523-01 Page 7 of 11Issue 1831
Figure 3. Control Board
PUSH
BUTTON
7-SEGMENT
DISPLAY
PUMP DOWN - WHEN UNIT IS IN PUMP DOWN MODE, Pd WILL BE
DISPLAYED ON 7-SEGMENT.
TO ACTIVATE PUMP DOWN MODE, THE CONTROL MUST BE IN
THE IDLE STATE, AND THE PUMP DOWN JUMPER PLACED
ACROSS THE TWO PUMP DOWN PINS. TO DEACTIVATE,
REMOVE JUMPER.

Page 8 of 11 507523-01Issue 1831
Start-Up Procedure
1. Close electrical disconnects to energize system.
2. Set room thermostat at desired temperature. Be sure
set point is below indoor ambient temperature.
3. Set the system thermostat at least 5°F below set point
to operate the system at 100% capacity.
Adjusting Charge
Factory charge is shown on the rating label located on the
access panel.
All units are factory charged for 15 feet of connecting
line set. Charge should be adjusted for line set lengths
other than 15 feet. For line sets shorter than 15 feet in
length, remove charge. For line sets longer than 15 feet,
add charge. Oil charge is sufcient for all line lengths in
most residential applications.
Refrigeration Charge Adjustment
Liquid Line Diameter Oz. Per Linear Foot
3/8” 0.6
Table 3.
Before nal adjustment is made to the refrigerant charge,
check for proper indoor airow. Recommended airow is
350-450 CFM per ton (12,000 Btuh) through a wet coil.
Refer to indoor unit instructions for methods of determining
air ow and blower performance.
Cooling Cycle Charge Adjustment Procedure
Units installed with cooling mode TXV require charging
with the subcooling method.
1. Operate unit a minimum of 10 minutes before checking
charge.
2. Measure liquid service valve pressure by attaching an
accurate gage to service port. Determine saturation
temp. from T/P chart.
3. Measure liquid line temperature by attaching an
accurate thermistor type or electronic thermometer to
liquid line near outdoor coil.
4. Calculate subcooling (saturation temp. - measured
temp.) and compare to table on back of control box
cover.
5. Add refrigerant if subcooling is lower than range shown
in table. Recover refrigerant to decrease subcooling.
6. If ambient temp. is lower than 65° F, weigh refrigerant
according to the name plate data.

507523-01 Page 9 of 11Issue 1831
Figure 4. A/C Single Phase Wiring Diagram - 24 & 36 Models
CONTROL MODULE
INVERTER
REACTOR
FERRITE
LINE VOLTAGE FIELD INSTALLED
FAN
MOTOR
RED
BLACK
GREEN
CONTROL
PANEL
BROWN
LO
PS
TP
HI
PS
OUT
O
COM
FAN PWM
BLACK
BLUE
YELLOW
YELLOW
BLACK
BROWN
BLACK
BLACK
YELLOW
BLUE
GREEN/YELLOW
GREEN/YELLOW
PARK
CNTCTR
CONTACTOR
RED
RED
RED
LOW PRESSURE
SWITCH
HIGH PRESSURE
SWITCH
CRANK CASE
HEATER
RED
BLUE
YELLOW
BLUE
BLUE
COMPRESSOR
CRANK CASE
THERMOSTAT
AMBIENT
SENSOR
10K
RESISTOR
LIQUID
SENSOR
CONTROL
PANEL
i COMFORT THERMOSTAT
INDOOR UNIT
GRAY GRAY
GRAY
GRAY/RED
GRAY/RED
GRAY/RED
BLACK
YELLOW
BLUE
BLACK
THERMAL
PROTECTION
SWITCH
GRAY
GRAY/RED
BLACK
BLUE
BROWN
NOTES: 1. NOTE-FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPICITY AND MAXIMUM OVERCURRENT PROTECTION SIZE. 2. WARNING-ELECTRIC SHOCK HAZARD CAN CAUSE INJURY OR DEATH. UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES. 3. REFER TO COMPRESSOR IN UNIT FOR ACTUAL TERMINAL ARRANGEMENT. 4. NOTE-IF ANY WIRE IN THE APPLIANCE IS REPLACED, IT MUST BE REPLACED WITH WIRE OF LIKE SIZE, RATING, INSULATION THICKNESS AND TERMINATION.
U W
V
1
2
L2
L1
CONTROL
PANEL
i+
R
i-
C
i+
R
i-
C
1
2
3
24 & 36 MODELS
537809-02
15D
CLASS 11 VOLTAGE FIELD WIRING
UW
V
RED
BLACK
BLUE
RED
BLACK
BLUE
WHITE
WHITE
BROWN
BLUE
BROWN

Page 10 of 11 507523-01Issue 1831
LINE VOLTAGE FIELD INSTALLED
CONTROL MODULE INVERTER
FERRITE
i COMFORT
i+
R
i-
C
i+
R
i-
C
FAN
MOTOR
RED
BLACK
GREEN
CONTROL
PANEL
BROWN
LO
PS
TP
HI
PS
OUT
O
COM
FAN PWM
BLACK
BLUE
YELLOW
YELLOW
BLACK
BROWN
BLACK
BLACK
YELLOW
BLUE
PARK
CNTCTR
CONTACTOR
RED
RED
RED
CRANK CASE
HEATER
RED
BLUE
YELLOW
BLUE
BLUE
COMPRESSOR
CRANK CASE
THERMOSTAT
CONTROL
PANEL
GRAY GRAY
GRAY
GRAY/RED
GRAY/RED
GRAY/RED
BLACK
YELLOW
BLACK
GRAY
GRAY/RED
BLACK
BLUE
BROWN
NOTES: 1. NOTE-FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPICITY AND MAXIMUM OVERCURRENT PROTECTION SIZE. 2. WARNING-ELECTRIC SHOCK HAZARD CAN CAUSE INJURY OR DEATH. UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES. 3. REFER TO COMPRESSOR IN UNIT FOR ACTUAL TERMINAL ARRANGEMENT. 4. NOTE-IF ANY WIRE IN THE APPLIANCE IS REPLACED, IT MUST BE REPLACED WITH WIRE OF LIKE SIZE, RATING, INSULATION THICKNESS AND TERMINATION.
U W
V
1
2
GRAY
GRAY/RED
L2
L1
CONTROL
PANEL
LOW PRESSURE
SWITCH
HIGH PRESSURE
SWITCH
AMBIENT
SENSOR
10K
RESISTOR
LIQUID
SENSOR THERMAL
PROTECTION
SWITCH
INDOOR UNIT
1
2
3
REACTOR
48 & 60 MODELS
537810-02
15D
CLASS II VOLTAGE FIELD WIRING
BROWN
BROWN
BLUE
RED
BLACK
BLUE
RED
BLACK
BLUE
UW
V
WHITE
WHITE
GREEN/YELLOW
GREEN/YELLOW
Figure 5. A/C Single Phase Wiring Diagram - 48 & 60 Models

507523-01 Page 11 of 11Issue 1831
Homeowner’s Information
Important System Information
• Your system should never be operated without a clean
air lter properly installed.
• Return air and supply air registers should be free from
restrictions or obstructions to allow full ow of air.
Regular Maintenance Requirements
Your system should be regularly inspected by a qualied
service technician. These regular visits may include
(among other things) checks for:
• Motor operation
• Ductwork air leaks
• Coil & drain pan cleanliness (indoor and outdoor)
• Electrical component operation & wiring check
• Proper refrigerant level & refrigerant leaks
• Proper airow
• Drainage of condensate
• Air lters(s) performance
• Blower wheel alignment, balance & cleaning
• Primary & secondary drain line cleanliness
• Proper defrost operation (heat pumps)
There is some routine maintenance procedures you can do
to help keep your system operating at peak performance
between visits.
Air Filter
Inspect air lters at least monthly and replace or clean as
required. Disposable lters should be replaced. Washable
lters may be cleaned by soaking in mild detergent and
rinsing with cold water. Replace lters with the arrows
pointing in the direction of airow. Dirty lters are the most
common cause of poor heating/cooling performance and
compressor failures.
Indoor Coil
If the system has been operated with a clean lter in place,
it should require minimal cleaning.
Contact your dealer for periodic system maintenance.
Condensate Drain
During cooling season check at least monthly for free ow
of drainage and clean if necessary.
Condenser Coils
Grass cuttings, leaves, dirt, dust, lint from clothes dryers,
and fall off trees can be drawn into coils by movement of
the air. Clogged condenser coils will lower the efciency of
your unit and cause damage to the condenser.
Periodically, debris should be brushed from the condenser
coils.
SHARP OBJECT HAZARD!
Condenser coils have sharp edges. Wear adequate
body protection on body extremities (e.g. gloves).
FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN BODILY INJURY.
WARNING
Use a soft brush with light pressure only. DO NOT damage
or bend condenser coil ns. Damaged or bent ns may
affect unit operation.
Painted Surfaces
For maximum protection of the unit’s nish, a good grade
of automobile wax should be applied every year. In
geographical areas where water has a high concentration
of minerals (calcium, iron, sulfur, etc.), it is recommended
that lawn sprinklers not be allowed to spray the unit. In
such applications, the sprinklers should be directed away
from the unit. Failure to follow this precaution may result
in premature deterioration of the unit nish and metal
components.
In sea coast areas, special maintenance is required due
to the corrosive atmosphere provided by the high salt
concentration in ocean mists and the air. Periodic washing
of all exposed surfaces and coil will add additional life to
your unit. Please consult your installing dealer for proper
procedures in your geographic area.
IF YOUR SYSTEM DOES NOT WORK, BEFORE
REQUESTING A SERVICE CALL:
1. Ensure thermostat is set below (cooling) or above
(heating) room temperature.
2. Inspect your return air lter: If it is dirty your air
conditioner may not function properly.
3. Check indoor and outdoor disconnect switches.
Conrm circuit breakers are ON or that fuses have not
blown. Reset breakers/replace fuses as necessary.
4. Inspect the outdoor unit for clogged condenser
coils,(grass cuttings, leaves, dirt, dust or lint). Ensure
that branches, twigs or other debris are not obstructing
the condenser fan.
IF YOUR SYSTEM STILL DOES NOT OPERATE,
CONTACT YOUR SERVICING DEALER.
Be sure to describe the problem, and have the model and
serial numbers of the equipment available.
If warranted replacement parts are required, the warranty
must be processed through a qualied distribution location.