Lennox 13ACD-018-230 User manual

506694-01 Issue 1720 Page 1 of 16
Save these instructions for future reference
INSTALLATION INSTRUCTIONS
13ACD Split System Air Conditioner
with Dry Nitrogen Holding Charge
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.
Table of Contents
General........................................................................2
Unit Dimensions - inches (mm) ...................................2
Parts Arrangement.......................................................2
Shipping and Packing List ...........................................3
Torque Requirements ..................................................3
Operating Gauge Set and Service Valves ...................3
Recovering Refrigerant from Existing System.............4
New Outdoor Unit Placement......................................5
Replacement Line Set .................................................6
Brazing Connections ...................................................7
Removing Existing Metering Device and Flushing Line
Set and Indoor Coil....................................................10
Installing New Indoor Metering Device......................11
Leak Test Line Set and Indoor Coil............................12
Evacuating Line Set, Indoor Coil and Outdoor Unit...13
Electrical....................................................................14
Servicing Outdoor Unit Delivered Void of Nitrogen
Charge.......................................................................15
Maintenance..............................................................15
This unit is factory-charged with dry nitrogen. The
unit is intended for installation in existing HCFC-22
systems. Carefully follow all installation procedures.
Open both service valves to evacuate system. This
unit is constructed without a factory installed lter drier.
Field-provided liquid line lter drier should be installed
per Figure 6A.
NOTE
Installation or repairs made by unqualied persons can
result in hazards to you and others. Installation MUST
conform with local building codes or, in the absence of
local codes, with the National Electrical Code NFPA
70/ANSI C1-1993 or current edition and Canadian
Electrical Code Part 1 CSA C22.1.
WARNING
Improper selection of a matching indoor unit and
a matching metering device, improper installation,
adjustment, alteration, service or maintenance may void
the warranty. The qualied installer or agency must use
factory-authorized kits or accessories when modifying
this products. Refer to the individual instructions
packaged with the kits or accessories when installing.
CAUTION
These instructions are intended as a general guide and
do not supersede national, state or local codes in any
way.
NOTE
This product contains a chemical known to the State
of California to cause cancer, birth defects or other
reproductive harm.
WARNING

506694-01Issue 1720Page 2 of 16
General
The 13ACD air conditioner, which will also be referred
to in this instruction as the outdoor unit, uses HCFC-22
refrigerant. This outdoor unit is intended as a replacement
outdoor component for use in residential systems which
include an existing indoor coil which is functioning properly.
It is NOT intended for new installations.
This outdoor unit is:
• shipped from the factory with nitrogen holding charge
that must be purged from the unit;
SUCTION AND LIQUID LINE
CONNECTIONS
SIDE VIEW
OUTDOOR COIL FAN
A
B
A
OPTIONAL UNIT STAND‐OFF KIT
(4) (FIELD-INSTALLED)
Discharge Air
SIDE VIEW
COMPRESSOR
• designed for use with HCFC-22 refrigerant only;
• designed for use in systems that use either a RFC
device (orice) included with outdoor unit or thermal
expansion valve (TXV). See the 13ACD product
specication sheet for approved xed orice sizes and
expansion valve kit match ups.
Important — The air conditioning unit must have properly
matched system components including indoor unit and
refrigerant metering device. Mismatched equipment may
have an impact on the operation, performance, reliability,
and warranty of the air conditioning unit.
Model A B
13ACD-018-230 24-1/4 (616) 25-1/4 (641)
13ACD-024-230 24-1/4 (616) 25-1/4 (641)
13ACD-030-230 24-1/4 (616) 33-1/4 (845)
13ACD-036-230 24-1/4 (616) 33-1/4 (845)
13ACD-042-230 28-1/4 (718) 29-1/4 (743)
13ACD-048-230 28-1/4 (718) 37-1/4 (946)
13ACD-060-230 28-1/4 (718) 33-1/4 (845)
Unit Dimensions - inches (mm)
Parts Arrangement
GROUND LUG
CONTROL BOX
SINGLE -POLE
CONTACTOR (K1)
LIQUID LINE
SERVICE VALVESUCTION LINE
SERVICE VALVE
DUAL RUN
CAPACITOR (C12)
NOTE: PLUMBING LAYOUT
TWEEN MODEL SIZES.
Figure 1. Typical Unit Parts Arrangement

506694-01 Issue 1720 Page 3 of 16
Shipping and Packing List
Check the unit for shipping damage. If damaged, or if parts
are missing, immediately contact the last shipping carrier.
1 — Assembled 13ACD unit
1 — Refrigerant ow control (RFC) kit (orice) (see Table 3
for a complete list of available xed orice kits)
Torque Requirements
When servicing or repairing HVAC components, ensure
the fasteners and caps are appropriately tightened. Table
1 lists torque values for fasteners.
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. 2 NM
Compressor bolts 90 in. lb. 10 NM
Gauge port seal cap 8 ft. lb. 11 NM
Table 1. Torque Requirements
Operating Gauge Set and Service Valves
Using Manifold Gauge Set
When checking the system charge, only use a manifold
gauge set that features low-loss anti-blow back ttings.
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 core. Figure 2 provides information
on accessing and operating both angle and ball-type
service valves.
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and tted
snugly over the cap before tightening.
IMPORTANT
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
SERVICE PORT CORE
SERVICE PORT
CAP ANGLE-TYPE SERVICE VALVE
(FRONT-SEATED CLOSED)
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
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,
rotate stem counterclockwise 90°. To close rotate stem
clockwise 90°.
12
3
4
5
6
7
8
9
10
11 12
1/12 TURN
To Access Service Port:
A service port cap protects the service port core from contamination and
serves as the primary leak seal.
1. Remove service port cap with an appropriately sized wrench.
2. Connect gauge set to service port.
3. When testing is completed, replace service port cap
and tighten as follows:
With torque wrench: Finger tighten and torque cap
per table 1.
Without torque wrench: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise.
12
3
4
5
6
7
8
9
10
1112
1/6 TURN
When service valve stem is
CLOSED, the service port is
open to the line set and indoor
unit.
When service valve stem is OPEN, the service
port is open to line set, indoor and outdoor unit.
Reinstall Stem Cap:
Stem cap protects the valve stem from damage and serves as
the primary seal. Replace the stem cap and tighten as follows:
With Torque Wrench: Finger tighten and then torque
cap per table 1.
Without Torque Wrench: Finger tighten and use an
appropriately sized wrench to turn an additional
1/12 turn clockwise.
Figure 2. Operating Angle and Ball-Type Service Valves

506694-01Issue 1720Page 4 of 16
Recovering Refrigerant from Existing System
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
SERVICE
DISCONNECT
SWITCH
Disconnect all power to the existing outdoor unit at the service
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:
Use 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
refrigerant to flush the system.
Remove all 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 newrefrigerant to flush the system.
The following devices could prevent full system charge recovery into the outdoor unit:
Outdoor unit's high or low-pressure switches (if applicable) when tripped can cycle the compressor OFF.
Compressor can stop pumping due to tripped internal pressure relief valve.
Compressor 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 cannot 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 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.
RECOVERING
REFRIGERANT FROM SYSTEM
Remove existing 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 volumes,
and/or long line sets.
12
3
Figure 3. Refrigerant Recovery

506694-01 Issue 1720 Page 5 of 16
New Outdoor Unit Placement
Remove existing outdoor unit prior to placement of new outdoor unit. See Unit Dimensions on Page 2 for sizing mounting
slab, platforms or supports. Refer to Figure 4 for mandatory installation clearance requirements.
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:
Clearance to one of the other three
sides must be 36 inches (914mm).
Clearance to one of the remaining
two sides may be 12 inches
(305mm) and the final side may be
6 inches (152mm).
Figure 4. Installation Clearances
Install unit level or, if on a slope, maintain slope tolerance of 2 degrees
(or 2 inches per 5 feet [50 mm per 1.5 m]) away from building
structure.
DETAIL A DETAIL B
DISCHARGE AIR
MOUNTING SLAB MUST SLOPE
AWAY FROM BUILDING.
GROUND LEVEL
STRUCTURE
Install unit away
from windows .
Two 90° elbows
installed in line set will
reduce line set vibration.
Figure 5. Placement and Slab Mounting

506694-01Issue 1720Page 6 of 16
Positioning Considerations
In order to avoid injury, take proper precaution when
lifting heavy objects.
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.
CAUTION
Consider the following when positioning the unit:
• Some localities are adopting sound ordinances based
on the unit’s sound level registered from the adjacent
property, not from the installation property. Install the
unit as far as possible from the property line.
• When possible, do not install the unit directly outside
a window. Glass has a very high level of sound
transmission. For proper placement of unit in relation
to a window, see the provided illustration in Figure 5.
Placing Outdoor Unit on Slab
When installing a unit at grade level, the top of the slab
should be high enough above the grade so that water
from higher ground would not collect around the unit as
illustrated in Figure 5.
Slab may be level or have a slope tolerance away from the
building of not more than two degrees, or 2 inches per 5
feet (51 mm per 1524 mm) as illustrated in Figure 5.
Installing Outdoor Unit on Roof
Install the unit at a minimum of 4 inches (102 mm) above
the surface of the roof. Ensure the weight of the unit is
properly distributed over roof joists and rafters. Redwood
or steel supports are recommended.
Replacement Line Set
This section provides information on replacement of
existing line set. If replacement line set is not required,
then proceed to Brazing Connections on Page 7.
Refrigerant Line Set
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (braze connections) to the indoor unit
coil (are or braze connections). If replacing line set, use
brazed, non-are line set, or eld-fabricated refrigerant
lines as listed in Table 2.
Existing line set should meet size requirements listed in
Table 2.
NOTE: When installing refrigerant lines longer than 50
feet, contact technical support for assistance. To obtain
the correct information from manufacturer, be sure to
communicate the following points:
• Model (13ACD) and size of unit (e.g. -060).
• Line set diameters for the unit being installed as listed
in Table 2 and total length of installation.
• Number of elbows and if there is a rise or drop of the
piping.
Model Field Connections Recommended Line Set
Liquid Line Suction Line Liquid Line Suction Line Line Sets
13ACD-018-230
3/8 in. (10 mm) 3/4 in. (19 mm) 3/8 in. (10 mm) 3/4 in. (19 mm)
Field-fabricated
brazed, non are
13ACD-024-230
13ACD-030-230
13ACD-036-230
3/8 in. (10 mm) 7/8 in. (22 mm) 3/8 in. (10 mm) 7/8 in. (22 mm)13ACD-042-230
13ACD-048-230
13ACD-060-230 3/8 in. (10 mm) 1-1/8 in. (29 mm) 3/8 in. (10 mm) 1-1/8 in. (29 mm)
Table 2. Refrigerant Line Set - inches (mm)
Roof Damage!
This system contains both refrigerant and oil. Some
rubber roong 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.
NOTE

506694-01 Issue 1720 Page 7 of 16
Brazing Connections
Use the procedures outline in Figure 6A and Figure 6B for
brazing line set connections to service valves.
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).
WARNING
Danger of re. 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
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.
IMPORTANT
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.
CAUTION

506694-01Issue 1720Page 8 of 16
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LINE SETS TO 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 Schrader valve in suction / vapor
line service port to allow nitrogen to escape.
NITROGEN
HIGHLOW USE REGULATOR TO FLOW
NITROGEN AT 1 TO 2 PSIG.
B
A
C
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
Flow regulated nitrogen (at 1 to 2 psig) through the low-side refrigeration gauge set into the liquid line service port valve, and out of the suction /
vapor line service port valve.
CUT AND DEBUR CAP AND CORE REMOVAL
Cut ends of the refrigerant lines square (free from nicks or dents)
and debur the ends. The pipe must remain round. Do not crimp end
of the line.
Remove service cap and core from both the
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
LIQUID LINE FILTER DRIER
(FIELD-PROVIDED)
Figure 6A. Brazing Procedure

506694-01 Issue 1720 Page 9 of 16
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 a saturated cloth as illustrated here before brazing to line set.
SATURATED CLOTH
IMPORTANT — Allow braze joint to cool. Apply
additional saturated cloths to help cool brazed joint.
Do not remove wet rag until piping has cooled.
Temperatures above 250ºF will damage valve seals.
6
SUCTION / VAPOR LINE
SATURATED CLOTH
SUCTION / VAPOR LINE
SERVICE VALVE
After all connections have been brazed, disconnect manifold gauge set from service ports. Apply saturated rags to both service valves to cool
piping. Once piping is cool, remove all wet cloths.
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 wet 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 a saturated cloth around service valve bodies and copper tube stub. Use another
saturated cloth 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 6B. Brazing Procedure (cont.)

506694-01Issue 1720Page 10 of 16
Removing Existing Metering Device and Flushing Line Set and Indoor Coil
Flushing is only recommended if existing indoor coil and line set are to be used. Otherwise, proceed to Installing Indoor
Metering Device on Page 11.
SENSING
LINE
TEFLON®RING
FIXED ORIFICE
BRASS NUT
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
LIQUID LINE ORIFICE HOUSING
DISTRIBUTOR TUBES
DISTRIBUTOR
ASSEMBLY
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. Ta ke 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 temporarily reconnect the liquid line to
the indoor unit's liquid line orifice housing.
TYPICAL EXISTING FIXED ORIFICE
REMOVAL PROCEDURE
(UNCASED COIL SHOWN)
TYPICAL EXISTING EXPANSION VALVE
REMOVAL PROCEDURE (UNCASED COIL
SHOWN)
TWO PIECE PATCH PLATE
(UNCASED COIL ONLY)
VAPOR
LINE
DISTRIBUTOR
ASSEMBLY
DISTRIBUTOR
TUBES
LIQUID
LINE
MALE EQUALIZER
LINE FITTING
EQUALIZER
LINE
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 expansion valve equalizer line
fitting on the vapor line.
DRemove the vapor line sensing bulb.
EDisconnect the liquid line from the expansion valve at the liquid line
assembly.
FDisconnect the expansion valve from the liquid line orifice housing.
Ta ke care not to twist or damage distributor tubes during this process.
GRemove and discard expansion valve and the two Te flon®rings.
HUse a field-provided fitting to temporary reconnect the liquid line to the
indoor unit's liquid line orifice housing.
LOW HIGH
EXISTING
INDOOR
UNIT
GAUGE
MANIFOLD
INVERTED CYLINDER
CONTAINS CLEAN
LIQUID 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 machine 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 refrigerant* and open its valve to allow
liquid refrigerant to flow into the system through the vapor line
valve. Allow the refrigerant to pass from the cylinder and through
the line set and the indoor unit coil before it enters the recovery
machine.
CAfter all of the liquid refrigerant has been recovered, switch the
recovery machine to vapor recovery so that all of the HCFC-22
vapor is recovered. Allow the recovery machine to pull the
system down to zero.
DClose the valve on the inverted HCFC-22 drum and the gauge
set valves. Pump the remaining refrigerant out of the recovery
machine and turn the machine off.
The line set and indoor unit coil must be flushed with at least the
same amount of clean refrigerant* that previously charged the
system. Check the charge in the flushing cylinder before
proceeding.
1A
2
3
1B
*IMPORTANT - Clean refrigerant is any refrigerant in a system that has not had compressor burn out. If the system
has experienced burn out, it is recommended that the existing line set and indoor coil be replaced.
Figure 7. Removing Metering Device and Flushing

506694-01 Issue 1720 Page 11 of 16
Installing New Indoor Metering Device
This outdoor unit is designed for use in existing HCFC-22
systems that use either a xed orice (RFC) or expansion
valve metering device (purchased separately) at the indoor
coil.
See the 13ACD product specication sheet for approved
xed orice sizes and expansion valve kit match ups. The
expansion valve unit can be installed internal or external to
the indoor coil.
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
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 temporarily
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 Te flon®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
12
3
4
5
6
7
8
9
10
11 12
1/2 Turn
SENSING BULB INSTALLATION
EQUALIZER LINE INSTALLATION
12
3
4
5
6
7
8
9
10
11 12
1/8 Turn
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.
INDOOR EXPANSION VALVE
INSTALLATION
TEFLON®RING
FIXED ORIFICE
BRASS NUT
LIQUID LINE ORIFICE HOUSING
DISTRIBUTOR TUBES
REMOVE AND DISCARD WHITE
TEFLON®SEAL (IF PRESENT)
FIXED ORIFICE (RFC)
DEVICE INSTALLATION
1A
1B SEE TABLE 3 FOR
INDOOR FIXED
ORIFICE KITS CATALOG
NUMBERS.
Figure 8. Installing Indoor Metering Device

506694-01Issue 1720Page 12 of 16
Capacity Catalog
Number
Part
Number Drill Size
018 10W95 100484-07 0.055
024 98M12 100484-12 0.062
030 11W00 100484-16 0.067
036 98M78 100484-24 0.076
042 10W86 100484-28 0.080
048 98M14 100484-36 0.089
060 98M15 100484-45 0.099
Table 3. Indoor Fixed Orice Kits
Leak Test Line Set and Indoor Coil
After completing the leak testing of the line set and indoor
coil as outlined in Figure 9, proceed to Evacuating Line Set
and Indoor Coil on Page 13.
The Environmental Protection Agency (EPA) prohibits
the intentional venting of HCFC refrigerants during
maintenance, service, repair and disposal of appliance.
Approved methods of recovery, recycling or reclaiming
must be followed.
IMPORTANT
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
Leak detector must be capable of sensing HCFC-22 refrigerant.
IMPORTANT
TO VAPOR
SERVICE VALVE
HCFC-22
MANIFOLD GAUGE SET
OUTDOOR UNIT
HIGHLOW
NITROGEN
AWith both manifold valves closed, connect the cylinder of HCFC-22 refrigerant to the center port of the manifold gauge set. Open the
valve on the HCFC-22 cylinder (vapor only).
BOpen the high pressure side of the manifold to weigh in a trace amount of HCFC-22 into the line set and indoor unit. A trace amount is a
maximum of two ounces (57 g) refrigerant or three pounds (31 kPa) pressure.Close the valve on the HCFC-22 cylinder and the valve
on the high pressure side of the manifold gauge set. Disconnect the HCFC-22 cylinder.
CConnect a cylinder of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set.
DAdjust dry 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.
EAfter 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.
FAfter leak testing, disconnect gauges from service ports.
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:
AConnect an HCFC-22 manifold gauge set high pressure hose
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.
BWith both manifold valves closed, connect the cylinder of
HCFC-22 refrigerant to the center port of the manifold gauge
set.
NOTE — Later in the procedure,
the HCFC-22 container will be
replaced by the nitrogen
container.
IMPORTANT — Leak detector
must be capable of sensing
HCFC-22 refrigerant.
1
CONNECT GAUGE SET
2TEST FOR LEAKS
A
B
DIGITAL SCALE
Figure 9. Leak Test

506694-01 Issue 1720 Page 13 of 16
Evacuating Line Set, Indoor Coil and Outdoor Unit
AOpen the liquid and vapor line service valves (counterclockwise) to release the factory nitrogen charge (contained in outdoor unit) into the
system.
BOpen both manifold valves and start the vacuum pump.
CEvacuate the line set, indoor unit and outdoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury).
NOTE — During the early stages of evacuation, it is desirable to close the manifold gauge valve at least once. A rapid rise in pressure
indicates a relatively large leak. If this occurs, repeat the leak testing procedure.
NOTE — The term absolute pressuremeans the total actual pressure within a given volume or system, above the absolute zero of
pressure. Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure.
DWhen the absolute pressure reaches 23,000 microns (29.01 inches of mercury), perform the following:
Close manifold gauge valves
Close valve on vacuum pump
Turn off vacuum pump
Disconnect manifold gauge center port hose from vacuum pump
Attach manifold center port hose to a dry nitrogen cylinder with pressure regulator set to 150 psig (1034 kPa) and purge the hose.
Open manifold gauge valves to break the vacuum in the line set and indoor unit.
Close manifold gauge valves.
EShut off the dry nitrogen cylinder and remove the manifold gauge hose from the cylinder. Open the manifold gauge valves to release the
dry nitrogen from the line set and indoor unit.
FReconnect the manifold gauge to the vacuum pump, turn the pump on, and continue to evacuate the line set and indoor unit until the
absolute pressure does not rise above 500 microns (29.9 inches of mercury) within a 20-minute period after shutting off the vacuum pump
and closing the manifold gauge valves.
GWhen the absolute pressure requirement above has been met, disconnect the manifold hose from the vacuum pump and connect it to an
upright cylinder of HCFC-22 refrigerant. Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor
unit.
HPerform the following:
OUTDOOR
UNIT
TO VAPOR
SERVICE VALVE
TO LIQUID LINE
SERVICE VALVE
MICRON
GAUGE
VACUUM PUMP
A34000 1/4 SAE TEE WITH
SWIVEL COUPLER
500
MANIFOLD
GAUGE SET
HCFC-22
RECOMMEND MINIMUM 3/8” HOSE
Connect low side of manifold gauge set
with 1/4 SAE in-line tee to vapor line
service valve
Connect high side of manifold gauge set
to liquid line service valve
Connect micron gauge available
connector on the 1/4 SAE in-line tee.
Connect the vacuum pump (with
vacuum gauge) to the center port of the
manifold gauge set. The center port line
will be used later for both the HCFC-22
and nitrogen containers.
HIGHLOW
1
2
3
4
5
6
7
8
9
10
11 12
1/6 TURN
NITROGEN
1CONNECT GAUGE SET
A
B
C
D
2EVACUATE THE SYSTEM
NOTE — Remove cores from service valves (if not already done).
Close manifold gauge valves.
Shut off HCFC-22 cylinder.
Reinstall service valve cores by removing manifold hose from service valve. Quickly install cores with core
tool while maintaining a positive system pressure.
Replace stem caps and secure finger tight, then tighten an additional one-sixth (1/6) of a turn as illustrated.
Figure 10. Evacuating System

506694-01Issue 1720Page 14 of 16
Electrical
In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the
current Canadian Electrical Code (CEC).
Refer to the furnace or air handler installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
24VAC Transformer
Use the transformer provided with the furnace or air handler
for low-voltage control power (24VAC - 40 VA minimum).
SERVICE
DISCONNECT
SWITCH
MAIN FUSE BOX/
BREAKER PANEL
Refer to the unit nameplate for minimum circuit ampacity, and maximum
fuse or circuit breaker (HACR per NEC). Install power wiring and properly
sized disconnect switch.
NOTE — Units are approved for use only with copper conductors.
Ground unit at disconnect switch or to an earth ground.
SIZE CIRCUIT AND INSTALL DISCONNECT SWITCH
NOTE — 24VAC, Class II circuit connections are made in the control
panel.
Ensure that existing room thermostat is installed on an inside wall
approximately in the center of the conditioned area and 5 feet (1.5m) from
the floor. It should not be installed on an outside wall or where it can be
affected by sunlight or drafts.
THERMOSTAT
5 FEET
(1.5M)
CHECK EXISTING ROOM THERMOSTAT
Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a
cutout is located in the bottom of the control panel. Connect conduit to the control panel using a proper conduit fitting.
HIGH VOLTAGE
FIELD WIRING
LOW VOLTAGE
FIELD WIRING
FACTORY
WIRING
WIRE RUN LENGTH AWG# INSULATION TYPE
LESS THAN 100' (30 METERS) 18 TEMPERATURE RATING
MORE THAN 100' (30 METERS) 16 35ºC MINIMUM.
Use existing or replace low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated.
HIGH VOLTAGE / GROUND WIRES
CONTROL WIRING
ARun 24VAC control wires through hole with grommet and secure with provided wire tie.
BMake 24VAC thermostat wire connections. Locate the two wires from the contactor and make connection using field provided wire nuts:
Black to Y1
Black to C (common)
NOTE — For proper voltages, select thermostat wire (control wires)
gauge per table below.
NOTE — Wire tie provides low voltage control wire
strain relief and to maintain separation of field
installed low and high voltage circuits.
W1
Y
G
C
R
Y
G
C
THERMOSTAT INDOOR UNIT
POWER
HEAT
COOLING
INDOOR
BLOWER
COMMON
OUTDOOR
UNIT
Y1
C
W
R
TYPICAL LOW VOLTAGE CONTROL
WIRING
SINGLE PHASE
NOTE — Do not bundle any excess 24VAC control wires inside
control panel.
CONTROL
WIRING
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
GROMMET AND
WIRE TIE
HIGH VOLTAGE
FLEXIBLE CONDUIT
A
B
BLACK
BLACK

506694-01 Issue 1720 Page 15 of 16
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
Figure 11. Typical Unit Wiring Diagram
If unit is equipped with a crankcase heater, it should
be energized 24 hours before unit start-up to prevent
compressor damage as a result of slugging.
IMPORTANT
Servicing Outdoor Unit Delivered Void of
Nitrogen Charge
If the outdoor unit is void of factory nitrogen charge, clean
the system using the procedure described below.
1. Use nitrogen to repressurize system and check for
leaks.
2. Evacuate the system using evacuating procedure
provided in this instruction.
3. Use nitrogen to break the vacuum and install a new
lter drier in the system.
4. Evacuate the system again using evacuating
procedure provided in this instruction.
5. Monitor the system to determine the amount of
moisture remaining in the oil. It may be necessary
to replace the lter drier several times to achieve
the required dryness level. If system dryness is not
veried, the compressor will fail in the future.
Maintenance
Maintenance and service must be performed by a qualied
installer or service agency. At the beginning of each cooling
season, the system should be checked as follows:
Outdoor Unit
1. Outdoor unit fan motor is pre-lubricated and sealed.
No further lubrication is needed.
2. Visually inspect all connecting lines, joints and coils for
evidence of oil leaks.
3. Check all wiring for loose connections.
4. Check for correct voltage at unit (unit operating).
5. Check amp draw on outdoor fan motor.
Motor Nameplate:_________ Actual:__________.

506694-01Issue 1720Page 16 of 16
6. Inspect drain holes in coil compartment base and
clean if necessary.
NOTE: If insufcient cooling occurs, the unit should be
gauged and refrigerant charge should be checked.
Outdoor Coil
Clean and inspect outdoor coil (may be ushed with a
water hose). Ensure power is off before cleaning.
NOTE: It may be necessary to ush the outdoor coil
more frequently if it is exposed to substances which are
corrosive or which block airow across the coil (e.g., pet
urine, cottonwood seeds, fertilizers, uids that may contain
high levels of corrosive chemicals such as salts)
Sea Coast — Moist air in ocean locations can carry salt,
which is corrosive to most metal. Units that are located near
the ocean require frequent inspections and maintenance.
These inspections will determine the necessary need
to wash the unit including the outdoor coil. Consult your
installing contractor for proper intervals/procedures for
your geographic area or service contract.
Indoor Unit
1. Clean or change lters.
2. Some blower motors are pre-lubricated and
permanently sealed. No more lubrication is needed.
3. Adjust blower speed for cooling. Measure the pressure
drop over the coil to determine the correct blower
CFM. Refer to the unit information service manual for
pressure drop tables and procedure.
4. Belt Drive Blowers - Check belt for wear and proper
tension.
5. Check all wiring for loose connections.
6. Check for correct voltage at unit. (blower operating)
7. Check amp draw on blower motor.
Motor Nameplate:_________ Actual:__________.
Indoor Coil
1. Clean coil if necessary.
2. Check connecting lines, joints and coil for evidence of
oil leaks.
3. Check condensate line and clean if necessary.
Start-Up and Performance Checklist
Job Name: ______________________________________________ Job No. _________________ Date: ________________
Job Location: ____________________________________________ City: ____________________ State: ________________
Installer: ________________________________________________ City: ____________________ State: ________________
Unit Model No. ___________________________________________ Serial No. _______________________________________
Service Technician: _______________________________________ Nameplate Voltage: _______________________________
Rated Load Ampacity: _______________ Compressor Amperage: _________________ OutdoorFan:_____________________
Maximum Fuse or Circuit Breaker: ____________________________
Electrical Connections Tight? Indoor Filter Clean? Supply Voltage (Unit Off): __________________________
Indoor Blower RPM: ______________________________________ S.P. Drop Over Indoor (Dry): ________________________
Outdoor Coil Entering Air Temperature: _______________________ Voltage with Compressor Operating:
___________________
Outdoor Fan Checked?
Refrigerant Lines: Leak Checked? Properly Insulated?
Service Valves: Fully Opened? Caps Tight?
Thermostat Calibrated? Properly Set? Level?