Lennox 13ACD-018-230, 13ACD-024-230, 13ACD-030-230, 13ACD-036-230, 13ACD-042-230 Installation Instructions Manual
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INSTALLATION INSTRUCTIONS
13ACD Split System Air Conditioner
with Dry Nitrogen Holding Charge
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
CAUTION
Improper selection of a matching indoor unit and
a matching metering device, improper installation,
adjustment, alteration, service or maintenance may void
the warranty. The qualied 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.
WARNING
Installation or repairs made by unqualied 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.
215 Metropolitan Drive
West Columbia, SC 29170
NOTE
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
These instructions are intended as a general guide and
do not supersede national, state or local codes in any
way.
WARNING
This product contains a chemical known to the State
of California to cause cancer, birth defects or other
reproductive harm.
506694-01 Issue 1720 Page 1 of 16
Save these instructions for future reference
General
SIDE VIEW
A
A
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;
Unit Dimensions - inches (mm)
• designed for use with HCFC-22 refrigerant only;
• designed for use in systems that use either a RFC
device (orice) included with outdoor unit or thermal
expansion valve (TXV). See the 13ACD product
specication sheet for approved xed orice 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.
OUTDOOR COIL FAN
COMPRESSOR
Discharge Air
B
SIDE VIEW
SUCTION AND LIQUID LINE
OPTIONAL UNIT STAND‐OFF KIT
CONNECTIONS
(4) (FIELD-INSTALLED)
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)
Parts Arrangement
CONTROL BOX
GROUND LUG
SINGLE -POLE
CONTACTOR (K1)
Figure 1. Typical Unit Parts Arrangement
NOTE: PLUMBING LAYOUT
TWEEN MODEL SIZES.
DUAL RUN
CAPACITO R (C12)
LIQUID LINE
SERVICE VALVE
SUCTION LINE
SERVICE VALVE
506694-01Issue 1720Page 2 of 16
Shipping and Packing List
Operating Gauge Set and Service Valves
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 (orice) (see Table 3
for a complete list of available xed orice 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
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.
IMPORTANT
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and tted
snugly over the cap before tightening.
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.
TO INDOOR
TO OUTDOOR
SERVICE PORT
UNIT
UNIT
CAP
ANGLE-TYPE SERVICE VALVE
When service valve stem is OPEN, the service
port is open to line set, indoor and outdoor unit.
Operating Ball-Type Service Valve:
1. Remove stem cap with an appropriately sized wrench.
2. Use an appropriately sized wrenched to open. To open valve,
rotate stem counterclockwise 90°. To close rotate stem
clockwise 90°.
TO OPEN ROTATE STEM
COUNTERCLOCKWISE 90°.
TO CLOSE ROTATE STEM
CLOCKWISE 90°.
SERVICE PORT
SERVICE PORT
SERVICE PORT
CORE
CAP
TO OUTDOOR
UNIT
TO INDOOR UNIT
BALL (SHOWN
CLOSED)
VALV E
STEM
STEM CAP
(BACK-SEATED OPENED)
SERVICE PORT CORE
(VALVE STEM SHOWN
OPEN)
INSERT HEX WRENCH
HERE
STEM
CAP
ANGLE-TYPE SERVICE VALV E
(FRONT-SEATED CLOSED)
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
When service valve stem is
CLOSED, the service port is
open to the line set and indoor
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.
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.
unit.
10
9
10
9
1/6 TURN
12
1
11
8
7
11
8
7
6
1/12 TURN
12
6
2
3
4
5
1
2
3
4
5
Figure 2. Operating Angle and Ball-Type Service Valves
506694-01 Issue 1720 Page 3 of 16
Recovering Refrigerant from Existing System
RECOVERING
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for
noncompliance.
REFRIGERANT FROM SYSTEM
DISCONNECT POWER
Disconnect all power to the existing outdoor unit at the service
1
disconnect switch or main fuse box/breaker panel.
SERVICE
DISCONNECT
SWITCH
CONNECT MANIFOLD GAUGE SET
Connect a gauge set, clean recovery cylinder and a recovery
2
machine to the service ports of the existing unit. Use the
instructions provided with the recovery machine to make the
connections.
MANIFOLD GAUGES
RECOVERY MACHINE
LOW
HIGH
RECOVERING REFRIGERANT
Remove existing refrigerant using one of the following procedures:
3
IMPORTANT — Some system configurations may contain higher than normal refrigerant charge due to either large internal coil volumes,
and/or long line sets.
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 new refrigerant 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
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:
A Start the existing system in the cooling mode and close the liquid line valve.
B Use 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.
C When the low side system pressures reach 0 psig, close the vapor line valve.
D Check gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system.
:
CLEAN RECOVERY
CYLINDER
OUTDOOR UNIT
to go into a vacuum.
Figure 3. Refrigerant Recovery
506694-01Issue 1720Page 4 of 16
New Outdoor Unit Placement
DETAIL A
DETAIL B
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.
CLEARANCE ON ALL SIDES — INCHES (MILLIMETERS)
6 (152)
ACCESS PANEL
NOTES:
Clearance to one of the other three
12 (305)
36 (914)
30 (762)
LINE SET
CONNECTIONS
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).
MINIMUM CLEARANCE BETWEEN
TWO UNITS
24 (610)
MINIMUM CLEARANCE
ABOVE UNIT
48 (1219)
Install unit away
from windows .
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.
Two 90° elbows
installed in line set will
reduce line set vibration.
MOUNTING SLAB MUST SLOPE
AWAY FROM BUILDING.
Figure 5. Placement and Slab Mounting
STRUCTURE
DISCHARGE AIR
GROUND LEVEL
506694-01 Issue 1720 Page 5 of 16
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