Lennox 13ACD-018-230, 13ACD-024-230, 13ACD-030-230, 13ACD-036-230, 13ACD-042-230 Installation Instructions Manual

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 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.

WARNING

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.

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 (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.

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 (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

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

Positioning Considerations

NOTE

CAUTION

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.

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.

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.

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

13ACD-018-230

13ACD-024-230

13ACD-030-230

13ACD-036-230

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)

3/8 in. (10 mm) 3/4 in. (19 mm) 3/8 in. (10 mm) 3/4 in. (19 mm)

3/8 in. (10 mm) 7/8 in. (22 mm) 3/8 in. (10 mm) 7/8 in. (22 mm)13ACD-042-230

Field Connections Recommended Line Set

Liquid Line Suction Line Liquid Line Suction Line Line Sets

Table 2. Refrigerant Line Set - inches (mm)

Field-fabricated

brazed, non are

506694-01Issue 1720Page 6 of 16

Brazing Connections

Use the procedures outline in Figure 6A and Figure 6B for
brazing line set connections to service valves.

WARNING

When using a high pressure gas such as dry
nitrogen to pressurize a refrigeration or air
conditioning system, use a regulator that
can control the pressure down to 1 or 2 psig
(6.9 to 13.8 kPa).

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.

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.

CAUTION

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.

IMPORTANT

Allow braze joint to cool before removing the wet rag
from the service valve. Temperatures above 250ºF can
damage valve seals.

506694-01 Issue 1720 Page 7 of 16

CUT AND DEBUR

Cut ends of the refrigerant lines square (free from nicks or dents)

1

and debur the ends. The pipe must remain round. Do not crimp end
of the line.

CUT AND DEBUR

LINE SET SIZE MATCHES

SERVICE VA LVE CONNECTION

SERVICE VA LVE

COPPER TUBE

REDUCER

CONNECTION

STUB

LINE SET SIZE IS SMALLER

THAN CONNECTION

REFRIGERANT LINE

DO NOT CRIMP SERVICE VALV E

CONNECTOR WHEN PIPE IS

SMALLER THAN CONNECTION

CAP AND CORE REMOVAL

Remove service cap and core from both the

2

vapor and liquid line service ports.

SERVICE PORT

CAP

SERVICE

PORT
CORE

LIQUID LINE SERVICE

VALV E

SUCTION / VAPOR LINE

SERVICE VA LVE

ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LINE SETS TO LIQUID AND SUCTION / VAPOR
LINE SERVICE VA LVES

3

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.

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 Schrader valve in suction / vapor

line service port to allow nitrogen to escape.

ATTACH

GAUGES

HIGHLOW

USE REGULATOR TO FLOW

NITROGEN AT 1 TO 2 PSIG.

SERVICE

PORT
CORE

SERVICE
PORT CAP

SUCTION / VAPOR SERVICE PORT MUST BE

OPEN TO ALLOW EXIT POINT FOR NITROGEN

VAPOR LINE

INDOOR

UNIT

LIQUID LINE

LIQUID LINE FILTER DRIER

(FIELD-PROVIDED)

C

LIQUID LINE SERVICE

SUCTION /

VAPOR LINE

SERVICE

VALV E

VALV E

A

SERVICE VA LVES, POINT FLAME

Figure 6A. Brazing Procedure

B

OUTDOOR

UNIT

WHEN BRAZING LINE SET TO

AWAY FROM SERVICE VALVE.

NITROGEN

506694-01Issue 1720Page 8 of 16

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

4

saturated cloth underneath the valve body to protect the base paint.

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

5

out of the suction / vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set connections.

BRAZE LINE SET

Wrap both service valves with a saturated cloth as illustrated here before brazing to line set.

6

LIQUID LINE SERVICE VALVE

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

IMPORTANT —

additional saturated cloths to help cool brazed joint.

Do not remove wet rag until piping has cooled.
Temperatures above 250ºF will damage valve seals.

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.

Allow braze joint to cool. Apply

WARNING

SUCTION / VAPOR LINE

SATURATED CLOTH

LIQUID LINE

SUCTION / VAPOR LINE

SERVICE VA LVE

SATURATED CLOTH

WHEN BRAZING LINE SET TO

SERVICE VA LVES, POINT FLAME

AWAY FROM SERVICE VALVE.

PREPARATION FOR NEXT STEP

7

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.

506694-01 Issue 1720 Page 9 of 16

Figure 6B. Brazing Procedure (cont.)

Removing Existing Metering Device and Flushing Line Set and Indoor Coil

1A

1B

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.

TYPICAL EXISTING FIXED ORIFICE
REMOVAL PROCEDURE
(UNCASED COIL SHOWN)

DISTRIBUTOR TUBES

LIQUID LINE ORIFICE HOUSING

DISTRIBUTOR

ASSEMBLY

A On fully cased coils, remove the coil access and plumbing panels.
B Remove any shipping clamps holding the liquid line and distributor

assembly.

C Using two wrenches, disconnect liquid line from liquid line orifice

housing. Take care not to twist or damage distributor tubes during
this process.

D Remove and discard fixed orifice, valve stem assembly if present

and Teflon

E Use a field-provided fitting to temporarily reconnect the liquid line to

the indoor unit's liquid line orifice housing.

LIQUID LINE ASSEMBLY

(INCLUDES STRAINER)

®

washer as illustrated above.

TEFLON® RING

FIXED ORIFICE

BRASS NUT

CONNECT GAUGES AND EQUIPMENT FOR
FLUSHING PROCEDURE

2

INVERTED CYLINDER
CONTAINS CLEAN
LIQUID HCFC-22* TO BE
USED FOR FLUSHING.

A

1

VAPOR LINE

SERVICE VALVE

EXISTING

INDOOR

UNIT

LIQUID LINE SERVICE

VALV E

VAPOR

LIQUID

D

RECOVERY

CYLINDER

A Inverted HCFC-22 cylinder with clean refrigerant* to the vapor service

valve.

B HCFC-22 gauge set (low side) to the liquid line valve.
C HCFC-22 gauge set center port to inlet on the recovery machine with an

empty recovery tank to the gauge set.

D Connect recovery tank to recovery machine per machine instructions.

OUTDOOR

B

NEW

UNIT

OPENED

C

RECOVERY MACHINE

MANIFOLD

LOW

TANK
RETURN

INLET

DISCHARGE

GAUGE

OR

TWO PIECE PATCH PLATE

(UNCASED COIL ONLY)

A On fully cased coils, remove the coil access and plumbing panels.
B Remove any shipping clamps holding the liquid line and distributor

C Disconnect the equalizer line from the expansion valve equalizer line

D Remove the vapor line sensing bulb.
E Disconnect the liquid line from the expansion valve at the liquid line

F Disconnect the expansion valve from the liquid line orifice housing.

HIGH

G Remove and discard expansion valve and the two Teflon
H Use a field-provided fitting to temporary reconnect the liquid line to the

CLOSED

3

TYPICAL EXISTING EXPANSION VALVE
REMOVAL PROCEDURE (UNCASED COIL
SHOWN)

LIQUID LINE

DISTRIBUTOR

TUBES

DISTRIBUTOR

ASSEMBLY

MALE EQUALIZER

LINE FITTING

SENSING BULB

assembly.

fitting on the vapor line.

assembly.

Ta ke care not to twist or damage distributor tubes during this process.

indoor unit's liquid line orifice housing.

ORIFICE

HOUSING

EQUALIZER
LINE

STUB END

TEFLON
RING

VAPOR

EXPANSION

VALV E

®

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

LINE

TEFLON

RING

®

SENSING

LINE

LIQUID

®

rings.

FLUSHING LINE SET

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.

A 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.

B Invert the cylinder of clean refrigerant* and open its valve to allow

B

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.

C After 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.

D Close 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.

LINE

*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

506694-01Issue 1720Page 10 of 16

Installing New Indoor Metering Device

1A

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.

INDOOR EXPANSION VALV E
INSTALLATION

(Uncased Coil Shown)

LIQUID LINE

ORIFICE

HOUSING

STUB

END

TEFLON
RING

EQUALIZER
LINE

VAPOR

EXPANSION

VALV E

®

ASSEMBLY WITH

LINE

TEFLON

LIQUID LINE

BRASS NUT

TWO PIECE

PATCH PLAT E

(UNCASED

COIL ONLY)

DISTRIBUTOR

TUBES

DISTRIBUTOR

ASSEMBLY

MALE EQUALIZER LINE

FITTING (SEE

EQUALIZER LINE
INSTALLATION FOR
FURTHER DETAILS)

Sensing bulb insulation is required if
mounted external to the coil casing. sensing
bulb installation for bulb positioning.

®

RING

SENSING

LINE

LIQUID LINE

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.

A Remove the field-provided fitting that temporarily

reconnected the liquid line to the indoor unit's
distributor assembly.

B Install one of the provided Teflon

stubbed end of the expansion valve and lightly
lubricate the connector threads and expose surface of
the Te flon

C Attach 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.

D Place the remaining Teflon

valve. Lightly lubricate connector threads and expose surface of the
Teflon

E Attach 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.

®

ring with refrigerant oil.

®

ring with refrigerant oil.

®

rings around the

®

washer around the other end of the expansion

SENSING BULB INSTALLATION

A Attach 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.

B Connect 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.

VAPOR LINE

ON LINES SMALLER THAN
7/8”, MOUNT SENSING
BULB AT EITHER THE 3 OR
9 O'CLOCK POSITION.

1/2 Turn

11

10

9

8

1/8 Turn

11

10

9

8

7

12

1

2

3

4

5

7

6

12

1

2

3

4

5

6

EQUALIZER LINE INSTALLATION

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.

FLARE SEAL CAP

OR

FLARE NUT

COPPER FLARE
SEAL BONNET

MALE BRASS EQUALIZER
LINE FITTING

VAPOR LINE

DISTRIBUTOR TUBES

LIQUID LINE ORIFICE HOUSING

BULB

VAPOR LINE

BULB

1B

REMOVE AND DISCARD WHITE

®

TEFLON

SEAL (IF PRESENT)

12

12

TEFLON® RING

FIXED ORIFICE

BULB

NOTE — NEVER

MOUNT ON BOTTOM

OF LINE.

ON 7/8” AND LARGER LINES,
MOUNT SENSING BULB AT
EITHER THE 4 OR 8 O'CLOCK
POSITION. NEVER MOUNT ON
BOTTOM OF LINE.

BULB

FIXED ORIFICE (RFC)
DEVICE INSTALLATION

SEE TABLE 3 FOR
INDOOR FIXED
ORIFICE KITS CATALOG
NUMBERS.

BRASS NUT

506694-01 Issue 1720 Page 11 of 16

Figure 8. Installing Indoor Metering Device

Capacity

1

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

Catalog
Number

Part

Number

Drill Size

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.

CONNECT GAUGE SET

A Connect 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.

B With 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.

IMPORTANT

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.

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.

HIGHLOW

MANIFOLD GAUGE SET

OUTDOOR UNIT

B

TO VAPOR

SERVICE VA LVE

A

HCFC-22

NITROGEN

TEST FOR LEAKS

After the line set has been connected to the indoor and outdoor units, check the line set connections and indoor unit for leaks. Use

2

the following procedure to test for leaks:

A With 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).

B Open 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.

C Connect a cylinder of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set.

D Adjust dry nitrogen pressure to 150 psig (1034 kPa). Open the valve on the high side of the manifold gauge set in order to pr essurize 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 leak testing, disconnect gauges from service ports.

DIGITAL SCALE

Figure 9. Leak Test

IMPORTANT

Leak detector must be capable of sensing HCFC-22 refrigerant.

506694-01Issue 1720Page 12 of 16

Evacuating Line Set, Indoor Coil and Outdoor Unit

CONNECT GAUGE SET

NOTE — Remove cores from service valves (if not already done).

1

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.

NITROGEN

HCFC-22

VACUUM PUMP

OUTDOOR

UNIT

A

B

A34000 1/4 SAE TEE WITH
SWIVEL COUPLER

500

C

MICRON

GAUGE

MANIFOLD

GAUGE SET

TO VAPOR

SERVICE VA LVE

TO LIQUID LINE
SERVICE VA LVE

D

EVACUATE THE SYSTEM

A Open the liquid and vapor line service valves (counterclockwise) to release the factory nitrogen charge (contained in outdoor unit) into the

2

system.

B Open both manifold valves and start the vacuum pump.
C Evacuate 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 pressure means 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.

D When 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.

E Shut 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.

F Reconnect 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.

G When 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.

H Perform the following:

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.

RECOMMEND MINIMUM 3/8” HOSE

10

9

8

1/6 TURN

12

11

7

6

HIGHLOW

1

2

3

4

5

506694-01 Issue 1720 Page 13 of 16

Figure 10. Evacuating System

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

SIZE CIRCUIT AND INSTALL DISCONNECT SWITCH

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.

SERVICE

DISCONNECT

SWITCH

MAIN FUSE BOX/
BREAKER PANEL

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).

CHECK EXISTING ROOM THERMOSTAT

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)

NOTE — Units are approved for use only with copper conductors.
Ground unit at disconnect switch or to an earth ground.

NOTE — 24VAC, Class II circuit connections are made in the control
panel.

HIGH VOLTAGE / GROUND WIRES

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.

CONTROL WIRING

Use existing or replace low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated.

A Run 24VAC control wires through hole with grommet and secure with provided wire tie.

B Make 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 — Do not bundle any excess 24VAC control wires inside

TYPICAL LOW VOLTAGE CONTROL

control panel.

WIRING

THERMOSTAT INDOOR UNIT

SINGLE PHASE

B

CONTROL

WIRING

A

GROMMET AND
WIRE TIE

W1

R

Y

G

C

POWER

HEAT

COOLING

INDOOR

BLOWER

COMMON

R

W

Y

BLACK

G

C

BLACK

OUTDOOR

UNIT

Y1

C

HIGH VOLTAGE

CONNECTIONS

(CONTACTOR)

GROUND

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.

HIGH VOLTAGE

FLEXIBLE CONDUIT

NOTE — Wire tie provides low voltage control wire
strain relief and to maintain separation of field
installed low and high voltage circuits.

506694-01Issue 1720Page 14 of 16

WARNING

Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and

local codes.

Line voltage is present at all components when unit is not in operation on units with single-pole contactors.
Disconnect all remote electric power supplies before opening access panel. Unit may have multiple power
supplies.

Figure 11. Typical Unit Wiring Diagram

IMPORTANT

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.

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:__________.

506694-01 Issue 1720 Page 15 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: _________________ Outdoor Fan: _____________________

Maximum Fuse or Circuit Breaker: ____________________________

Electrical Connections Tight?

Indoor Blower RPM: ______________________________________ S.P. Drop Over Indoor (Dry): ________________________

Outdoor Coil Entering Air Temperature: _______________________

Indoor Filter Clean? Supply Voltage (Unit Off): __________________________

Voltage with Compressor Operating:
___________________

Outdoor Fan Checked?

Refrigerant Lines: Leak Checked? Properly Insulated?

Service Valves: Fully Opened? Caps Tight?

Thermostat Calibrated? Properly Set? Level?

506694-01Issue 1720Page 16 of 16