American Standard 4A7Z0 Assembly instructions

11-BC25D1-7
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
Air Conditioner/Heat Pumps
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
NOTE: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture’s split
systems are A.H.R.I. rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and
outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.
4A7Z0/4A6Z0 with AccuLinkTM and Charge AssistTM
Installer’s Guide
Table of Contents
Section 1. Safety..................................................................................... 2
Section 2. Unit Location Considerations..............................................3
Section 3. Unit Preparation.................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations......................................... 6
Section 6. Refrigerant Line Routing ..................................................... 7
Section 7. Refrigerant Line Brazing...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................. 10
Section 9. Evacuation........................................................................... 11
Section 10. Service Valves................................................................... 11
Section 11. Electrical - Low Voltage.................................................... 12
Section 12. Electrical - High Voltage ................................................... 17
Section 13. Start Up.............................................................................. 18
Section 14. System Charge Adjustment............................................. 19
Section 15. Checkout Procedures and Troubleshooting................... 30

2 11-BC25D1-7
Section 1. Safety
▲
WARNING
!
This information is intended for use by individuals
possessing adequate backgrounds of electrical and
mechanical experience. Any attempt to repair a central
air conditioning product may result in personal injury
and/or property damage. The manufacture or seller
cannot be responsible for the interpretation of this
information, nor can it assume any liability in connec-
tion with its use.
These units use R-410A refrigerant which operates
at 50 to 70% higher pressures than R-22. Use only
R-410A approved service equipment. Refrigerant
cylinders are painted a “Rose” color to indicate the
type of refrigerant and may contain a “dip” tube to
allow for charging of liquid refrigerant into the sys-
tem. All R-410A systems use a POE oil that readily
absorbs moisture from the atmosphere. To limit this
“hygroscopic” action, the system should remain sealed
whenever possible. If a system has been open to the
atmosphere for more than 4 hours, the compressor oil
must be replaced. Never break a vacuum with air and
always change the driers when opening the system
for component replacement. For specific handling
concerns with R-410A and POE oil, reference Retrofit
Bulletin SS-APG006-EN and APP-APG012-EN.
Extreme caution should be exercised when opening
the Liquid Line Service Valve. Turn counterclockwise
until the valve stem just touches the rolled edge. No
torque is required. Failure to follow this warning will
result in abrupt release of system charge and may
result in personal injury and /or property damage.
UNIT CONTAINS R-410A REFRIGERANT!
R-410A operating pressures exceed the limit of R-22.
Proper service equipment is required. Failure to use
proper service tools may result in equipment damage
or personal injury.
SERVICE
USE ONLY R-410A REFRIGERANT AND AP-
PROVED POE COMPRESSOR OIL.
▲
WARNING
!
▲
WARNING
!
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and trouble-
shooting of this product, it may be necessary to work
with live electrical components. Failure to follow all
electrical safety precautions when exposed to live
electrical components could result in death or serious
injury.
▲
WARNING
!
If using existing refrigerant lines make certain that all
joints are brazed, not soldered.
▲CAUTION
!
Scroll compressor dome temperatures may be hot. Do
not touch the top of compressor; it may cause minor to
severe burning.
▲CAUTION
!
▲
WARNING
!
NOTE: It is recommended to install manufacturer ap-
proved matched indoor and outdoor systems.
NOTE: All approved split systems are AHRI rated with only
TXV/EEV indoor systems.
NOTE: The benefits of installing approved indoor and
outdoor split systems are maximum efficiency, optimum
performance and the best overall system reliability.

11-BC25D1-7 3
When mounting the outdoor unit on a roof, be
sure the roof will support the unit’s weight.
Properly selected isolation is recommended to
alleviate sound or vibration transmission to the
building structure.
Section 2. Unit Location Considerations
2.1 Unit Dimensions and Weight
2.2 Refrigerant Piping Limits
Unit Dimensions and Weight
Models H x D x W (in) Weight* (lb)
4A7Z0024A 45 x 34 x 37 325
4A7Z0036B 45 x 34 x 37 325
4A7Z0048A/B 45 x 34 x 37 410
4A7Z0060A 45 x 34 x 37 410
4A6Z0024A 45 x 34 x 37 330
4A6Z0036B 45 x 34 x 37 335
4A6Z0048A/B 45 x 34 x 37 420
4A6Z0060A 45 x 34 x 37 420
* Weight values are estimated (uncrated).
1. The maximum length of refrigerant lines
from outdoor to indoor unit should NOT
exceed sixty (60) feet.
2. The maximum vertical change should not
exceed twenty five (25) feet*.
3. Service valve connection diameters are
shown in Table 5.1.
NOTE: For line lengths greater than sixty (60)
feet, Refer to Refrigerant Piping Application
Guide, SS-APG006-EN or Refrigerant Piping
Software Program, 32-3312-03 (or latest revi-
sion).
Table 2.1
*
*
* Restricted to maximum vertical change of 25 ft.
25’
Max
Line
Lift
Standard
Line Set
60’ Max
Line Length
25’
Max
Line
Lift
35’ Max
Line
Length
35’ Max
Line
Length
D
H
W

4 11-BC25D1-7
2.3 Suggested Locations for Best Reliability
2.4 Cold Climate Considerations (Heat Pump only)
Ensure the top discharge area is unrestricted for
at least five (5) feet above the unit.
Three (3) feet clearance must be provided in
front of the control box (access panels) and any
other side requiring service.
Do not locate close to bedrooms as operational
sounds may be objectionable.
Avoid locations such as near windows where
condensation and freezing defrost vapor can
annoy a customer.
Position the outdoor unit a minimum of 12” from
any wall or surrounding shrubbery to ensure
adequate airflow.
Outdoor unit location must be far enough away
from any structure to prevent excess roof runoff
water or icicles from falling directly on the unit.
NOTE: It is recommended that these precau-
tions be taken for units being installed in areas
where snow accumulation and prolonged below
freezing temperatures occur.
• Units should be elevated 3-12 inches above
the pad or rooftop, depending on local
weather. This additional height will allow
drainage of snow and ice melted during
defrost cycle prior to its refreezing. Ensure
that drain holes in unit base pan are not
obstructed preventing draining of defrost
water.
• If possible, avoid locations that are likely to
accumulate snow drifts. If not possible, a
snow drift barrier should be installed around
the unit to prevent a build-up of snow on the
sides of the unit.
Min. 12” to
Shrubbery
Avoid Install
Near Bedrooms
Min 5’ Unrestricted
Access Panel
Min 3’
Unrestricted
Min. 12” to
Shrubbery Min. 12”
to Wall
Min. 12”
Snow
Barrier
3-12” Elevation
Snow Legs
Pad

11-BC25D1-7 5
2.5 Coastal Considerations
STEP 2 - To remove the unit from the pallet,
remove tabs by cutting with a sharp tool.
Section 3. Unit Preparation
3.1 Prepare The Unit For Installation
STEP 1 - Check for damage and report prompt-
ly to the carrier any damage found to the unit.
Section 4. Setting the Unit
4.1 Pad Installation
When installing the unit on a support pad, such
as a concrete slab, consider the following:
• The pad should be at least 1” larger than the
unit on all sides.
• The pad must be separate from any structure.
• The pad must be level.
• The pad should be high enough above grade
to allow for drainage.
• The pad location must comply with National,
State, and Local codes.
If installed within one mile of salt water, including seacoasts and inland waterways, models without factory sup-
plied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time.

6 11-BC25D1-7
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
5.3 Required Refrigerant Line Length
5.2 Factory Charge
Line Sizes Service Valve Connection Sizes
Model Vapor
Line Liquid Line Vapor Line Connection Liquid Line Connection
4A7Z0024A
3/4 3/8 5/8 3/8
4A7Z0036B
3/4 3/8 3/4 3/8
4A7Z0048A/B
7/8 3/8 7/8 3/8
4A7Z0060A
7/8 3/8 7/8 3/8
4A6Z0024A
5/8 3/8 5/8 3/8
4A6Z0036B
3/4 3/8 3/4 3/8
4A6Z0048A/B
3/4 3/8 3/4 3/8
4A6Z0060A
3/4 3/8 3/4 3/8
Table 5.1
5.4 Refrigerant Line Insulation
Important: The Vapor Line must always be
insulated. DO NOT allow the Liquid Line and
Vapor Line to come in direct (metal to metal)
contact.
Vapor Line
Liquid Line
Insulation
Determine required line length and lift. You will
need this later in STEP 2 of Section 14.
Total Line Length = __________ Ft.
Total Vertical Change (lift) = __________ Ft.
American Standard Heating & Air Conditioning outdoor condensing units are factory charged with the system
charge required for the outdoor condensing unit, fifteen (15) feet of tested connecting line, and the smallest
indoor evaporative coil match. See unit nameplate. If connecting line length exceeds fifteen (15) feet and/
or a larger indoor evaporative coil is installed, then final refrigerant charge adjustment is necessary. Use
Charge Assist™ or the Manual Charging procedure found in the outdoor unit Service Facts. Charge level can
always be verified with the Refrigerant Charging Chart found in the Service Facts.
Line Length

11-BC25D1-7 7
5.5 Reuse Existing Refrigerant Lines
For retrofit applications, where the existing
indoor evaporator coil and/or refrigerant lines
will be used, the following precautions should
be taken:
• Ensure that the indoor evaporator coil and
refrigerant lines are the correct size.
• Ensure that the refrigerant lines are free of
leaks, acid, and oil.
Important: For more information see publica-
tion number SS-APG006-EN.
▲CAUTION
!
If using existing refrigerant lines make certain
that all joints are brazed, not soldered.
Section 6. Refrigerant Line Routing
6.1 Precautions
Important: Take precautions to prevent noise
within the building structure due to vibration
transmission from the refrigerant lines.
For Example:
• When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type
hangers.
• Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings.
• Where the refrigerant lines run through a wall or sill, they should be insulated and isolated.
• Isolate the lines from all ductwork.
• Minimize the number of 90º turns.
Comply with National, State, and Local Codes when
isolating line sets from joists, rafters, walls, or other
structural elements.
Isolation From Joist/Rafter
Side View
8 Feet Maximum
Secure Vapor line from joists using isolators every 8 ft. Secure
Liquid Line directly to Vapor line using tape, wire, or other appro-
priate method every 8 ft.
Joist/Rafter
Isolator
Line Set
8 Feet Maximum

8 11-BC25D1-7
Isolation In Wall Spaces
Side View
Wall
Isolator
Line Set
8 Feet Maximum
Secure Vapor Line using isolators every 8 ft. Secure Liquid Line
directly to Vapor Line using tape, wire, or other appropriate
method every 8 ft.
8 Feet Maximum
Isolation Through Wall DO NOT hang line sets from ductwork
Sealant
Insulation
Vapor Line
Wall
Ductwork
Isolator
Line Set
Section 7. Refrigerant Line Brazing
7.1 Braze The Refrigerant Lines
STEP 1 - Remove caps or plugs. Use a deburr-
ing tool to debur the pipe ends. Clean both
internal and external surfaces of the tubing
using an emery cloth.

11-BC25D1-7 9
STEP 2 - Remove the pressure tap cap and
valve cores from both service valves.
STEP 3 - Purge the refrigerant lines and indoor
coil with dry nitrogen.
STEP 4 - Wrap a wet rag around the valve
body to avoid heat damage and continue the
dry nitrogen purge.
Braze the refrigerant lines to the service
valves.
Continue the dry nitrogen purge. Do not re-
move the wet rag until all brazing is completed.
Important: Remove the wet rag before stopping
the dry nitrogen purge.
NOTE: Precautions should be taken to avoid
heat damage to basepan during brazing. It is
recommended to keep the flame directly off of
the basepan.

10 11-BC25D1-7
STEP 5 - Replace the pressure tap valve cores
after the service valves have cooled.
STEP 2 - Check for leaks by using a soapy solu-
tion or bubbles at each brazed location.
Remove nitrogen pressure and repair any leaks
before continuing.
Section 8. Refrigerant Line Leak Check
8.1 Check For Leaks
STEP 1 - Pressurize the refrigerant lines and
evaporator coil to 150 PSIG using dry nitrogen.
150 PSIG

11-BC25D1-7 11
Section 9. Evacuation
9.1 Evacuate the Refrigerant Lines and Indoor Coil
Important: Do not open the service valves until
the refrigerant lines and indoor coil leak check
and evacuation are complete.
STEP 1 - Evacuate until the micron gauge reads
no higher than 350 microns, then close off the
valve to the vacuum pump.
STEP 2 - Observe the micron gauge. Evacuation
is complete if the micron gauge does not rise
above 500 microns in one (1) minute.
Once evacuation is complete blank off the
vacuum pump and micron gauge, and close the
valves on the manifold gauge set. 1 MIN.
Section 10. Service Valves
10.1 Open the Gas Service Valve
Important: Leak check and evacuation must be
completed before opening the service valves.
NOTE: Do not vent refrigerant gases into the
atmosphere
STEP 1 - Remove valve stem cap.
STEP 2 - Using an adjustable wrench, turn valve
stem 1/4 turn counterclockwise to the fully open
position.
STEP 3 - Replace the valve stem cap to prevent
leaks. Tighten finger tight plus an additional 1/6
turn.
0350
Microns
ON OFF
CAP
1/4 TURN ONLY
COUNTERCLOCKWISE
FOR FULL OPEN
POSITION
VALVE STEM
GAS LINE CONNECTION
UNIT SIDE
OF VALVE
PRESSURE TAP PORT

12 11-BC25D1-7
10.1 Open the Liquid Service Valve
Important: Leak check and evacuation must be
completed before opening the service valves.
STEP 1 - Remove service valve cap.
STEP 2 - Fully insert 3/16” hex wrench into the
stem and back out counterclockwise until valve
stem just touches the rolled edge (approximately
five (5) turns.)
STEP 3 - Replace the valve cap to prevent leaks.
Tighten finger tight plus an additional 1/6 turn.
Cap
Rolled Edge to
Captivate Stem
Hex Headed
Valve System
Service Port
3/16” Hex Wrench
Unit Side
of Service
Valve
Extreme caution should be exercised when
opening the Liquid Line Service Valve. Turn
counterclockwise until the valve stem just
touches the rolled edge. No torque is required.
Failure to follow this warning will result in abrupt
release of system charge and may result in
personal injury and /or property damage.
▲WARNING
!
Section 11. Electrical - Low Voltage
11.1 Low Voltage Maximum Wire Length
Table 11.1 defines the maximum total length of
low voltage wiring from the outdoor unit, to the
indoor unit, and to the thermostat.
NOTE: The use of color coded low voltage
wire is recommended to simplify connections
between the outdoor unit, the control, and the
indoor unit.
NOTE: The maximum total cable length for the
entire comfort control communicating system is
500 ft. 18 AWG.
Table 11.1
AccuLinkTM Control Wiring
WIRE SIZE MAX. WIRE LENGTH
18 AWG 250 Ft.
24 VOLTS
WIRE SIZE MAX. WIRE LENGTH
18 AWG 150 Ft.
16 AWG 225 Ft.
14 AWG 300 Ft.

11-BC25D1-7 13
11.2 Low Voltage Hook-up Diagrams
Communicating
Comfort Control
AAM8 Communicating
Air Handler
Communicating Outdoor Unit
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Field wiring
Brown
Blue
Brown
Blue
Red
B - Blue
D - Note 2
O
D
R
B
Y1
Y2 Note 1
Fully Communicating System
Notes:
1. In communicating mode, unused terminals are non-functional. Do not use.
2. “D” is the data line. Installer to select a wire color.
3. If a 3rd party condensate overflow switch is installed, it should be wired in series with R to the thermostat
or connected to the External Switch terminals on the AFC. See External Switch wiring section in the air
handler Installer’s Guide.
4. For 24 VAC Outdoor equipment, accessory BAYCC24VK01A must be ordered separately.
Communicating
Comfort Control
Communicating Outdoor Unit
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Field wiring
Brown
Blue
Brown
Blue
Red B - Blue
D - Note 2
Note 3
Note 1
Comm. Variable Speed
Furnace or Air Handler
W1
W2
W3
G
Y2
B
O
BK
D
Y1
R
Fully Communicating System
Notes:
1. In communicating mode, unused terminals are non-functional. Do not use.
2. “D” is the data line. Installer to select a wire color.
3. To connect optional devices (such as a float switch), wire in series from indoor unit “R” to Comfort Control “R”.

14 11-BC25D1-7
Note:
1. * For multiple stages of electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat.
2. YI and YO connections must be made as shown for freeze protection and internally mounted condensate overflow circuits to
work properly.
3. If a 3rd party condensate overflow switch is installed, it should be wired in series between YO and Y to the outdoor unit.
4. Air conditioner models do not use the Black (X2) or Orange wires from the outdoor unit.
5. For non-communicating applications, use 24 volt harness accessory BAYACHP024A.
Comfort Control
AAM7 Air Handler
Air Conditioner
or Heat Pump - Note 4
Note 5
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Yellow/Red
Field wiring
Yellow
Blue
Black
(X2)
Red
Orange
Red
Yellow
Orange
Green
White
Blue
B
B - Blue
W
X2
G
Y1
Brown
Y2
Y1 - Yellow
Y2 - Brown
R
O
O
R
B
YI
W1
YO
Y2
BK
G
W2
W3 *
R - Red
O - Orange
(In)
(Out)
W1 - White
AAM7 Air Handler
with 24 Volt Control
Hook-up Diagram
24 Volt
1
1
12345
12345
HP
2(Compressor)
2(Stages)
AC (System)
}
OUTDOOR
Capacity (Tons)
OUTDOOR
}
Torque
CFM/Ton
Cool OffDelay
}
INDOOR
CFM
+12V
R13
R14
R1
R4
1
U1
RNET 1
S1
on
on
S2
RNET 2
R6
C22
C19
C15 C12
C18
C21
C10
D9
L1
R22
Must configure to “OFF” for heat pump.
Must configure to “ON” for 20 SEER (2 stages)
Must configure to “ON” for 20 SEER
(2 compressors)
AAM7 Air Handler with 24 Volt Control
Hook-up Diagram (Continued)
Control
Board

11-BC25D1-7 15
Red
Yellow
Brown
Green
White
Blue
Orange
W1
O
B
X2
G
Y2
Y1 Yellow
Yellow
Brown Yellow/Red
Blue
Orange
Blue
Black
(X2)
Red Red Orange
R
Comfort Control
Comm. Variable Speed
Furnace or Air Handler - Note 1
Air Conditioner or
Heat Pump - Note 6
Black
Note 7
W1
W2
W3
G
Y2
B
O
BK
D
Y1
R
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Notes:
1. See User Interface setup menu for 24 VAC control mode and cooling CFM options.
2. First stage CFM for 4A7Z0 and 4A6Z0 equals 50%.
3. For furnace+heat pump applications, comfort control must be dual fuel capable or use accessory TAYPLUS103A.
4. W3 terminal may not be present on indoor unit.
5. Comfort Control may not have W2 or W3 terminals.
6. Air conditioner models do not use Black (X2) or Orange wires from the outdoor unit.
7. For non-communicating applications, use 24 volt harness accessory BAYACHP024A.
Communicating Indoor Unit
with 24 Volt Control
Hook-up Diagram

16 11-BC25D1-7
11.3 Defrost Control (Heat Pump only)
The demand defrost control measures heat
pump outdoor ambient temperature with a sen-
sor located outside the outdoor coil. A second
sensor located on the outdoor coil is used to
measure the coil temperature.The difference
between the ambient and the colder coil tem-
perature is the difference or delta-T measure-
ment. This delta-T measurement is representa-
tive of the operating state and relative capacity
of the heat pump system. By measuring the
change in delta-T, we can determine the need
for defrost. The coil sensor also serves to
sense outdoor coil temperature for termination
of the defrost cycle.
FAULT IDENTIFICATION
A fault condition is indicated by the fault LED
on the control board inside the heat pump
control box.
In normal operation, the status LED will flash
once each second. If the light is flashing more
than once per second or not at all, refer to the
Service Facts for that unit.
PIN IDENTIFICATION
1. TEST_COMMON (Shorting any of the
other pins to this pin causes the function
of the other pin to be executed. Leaving
this pin open results in the normal mode of
operation.)
2. TST = Test (Shorting TEST_COMMON to
this pin speeds up all defrost board tim-
ings.)
3. FRC_DFT = Forced Defrost (Short
TEST_COMMON to this pin for two [2]
seconds to initiate a forced defrost. Re-
move the short after defrost initiates.)
DEFROST CONTROL CHECKOUT
Normal operation requires:
a. Status LED on board flashing 1 time/sec-
ond.
b. 12 VDC between D & B in communicating
mode.
c. 24 VAC between R & B in 24V mode.
d. Defrost initiation when FRC_DFT pin is
shorted to TEST_COMMON pin.
If a defrost control problem is suspected, refer to
the service information in control box.
FRC_DFT
TEST_COMMON
TST
OUTDOOR CONTROL
BOARD – PIN
IDENTIFICATION

11-BC25D1-7 17
Section 12. Electrical - High Voltage
12.1 High Voltage Power Supply
The high voltage power supply must agree with
the equipment nameplate.
Power wiring must comply with national, state,
and local codes.
Follow instructions on unit wiring diagram located
on the inside of the control box cover and in the
Service Facts document included with the unit.
12.2 High Voltage Disconnect Switch
12.3 High Voltage Ground
Ground the outdoor unit per national, state, and
local code requirements.
Install a separate disconnect switch at the
outdoor unit.
For high voltage connections, flexible electri-
cal conduit is recommended whenever vibra-
tion transmission may create a noise problem
within the structure.
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and
troubleshooting of this product, it may be nec-
essary to work with live electrical components.
Failure to follow all electrical safety precau-
tions when exposed to live electrical compo-
nents could result in death or serious injury.
▲
WARNING
!

18 11-BC25D1-7
Section 13. Start Up
13.1 System Start Up
STEP 2 - Set System Thermostat to OFF.
STEP 3 - Turn on disconnect(s) to apply power
to the indoor and outdoor units.
STEP 5 - Set system thermostat to ON.
OFF
D
O
N
E
CANCEL
ON
OFF
STEP 4 - Wait one (1) hour before starting the
unit if compressor crankcase heater acces-
sory is used and the Outdoor Ambient is below
70ºF. 60 MIN.
STEP 1 - Ensure Sections 7 through 12 have
been completed.
ON
D
O
N
E
CANCEL

11-BC25D1-7 19
STEP 1 - Check the outdoor temperatures.
Subcooling (in cooling mode) is the only recom-
mended method of charging above 55º F ambi-
ent outdoor temperature. See Section 14.2.
For outdoor temperatures below 55º F, follow
the Superheat charging instructions (in heating
mode). See Section 14.6.
NOTE: It is important to return in the spring or
summer to accurately charge the system in the
cooling mode with outdoor ambient temperature
below 55ºF.
For best results the indoor temperature should
be kept between 70º F to 80º F.
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5.3.
Total Line Length = __________ Ft.
Vertical Change (Lift) = __________ Ft.
Section 14. System Charge Adjustment
14.1 Temperature Measurements
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
Indoor Temp
80º F
70º F
Outdoor Temp 1
55º F
120º F
Outdoor Temp 2
See Section 14.6 for
Outdoor
Temperatures
Below 55º F
See Section 14.2 for
Outdoor
Temperatures
Above 55º F
55º F
LIFT

20 11-BC25D1-7
Dip Switch setting from Subcool Charging Table Corrections = __________
Set Dip Switch on the Charge AssistTM control board.
STEP 2 - U sing the total Line Length and Lift measured in STEP 1 and the subcool charging table corrections below, deter-
mine the Dip Switch position for your model.
SUBCOOL CHARGING TABLE CORRECTIONS
SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
Dip Switch 1- ON
Dip Switch 2-ON
Max Lift
25
20
15
10
0
10 20 25 30 40 60 80
Dip Switch 3-ON
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
Max Lift
25
20
15
10
0
10 20 25 30 40 60 80
TABLE A TABLE B
These
matches
ONLY
4TXCB003 Coil Downflow & Horizontal Right Only
4TXCC006 Coil Downflow & Horizontal Right Only
4TEE3_03 Air Handler Downflow & Horizontal Left Only
All other approved, matched systems.
2-TON HP MODEL ONLY
SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE
TOTAL REFRIGERANT LINE LENGTH (FEET)
TABLE A TABLE B
REFRIGERANT LINE LIFT (FEET)
Dip Switch 2-ON
Dip Switch 3-ON
All other approved, matched systems.
Max Lift
25
20
15
10
0
10 20 25 30 40 60 80
Dip Switch 1-ON
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
Max Lift
25
20
15
10
0
10 20 25 30 40 60 80
4TEE3_06 Air Handler
4TXCC008 Coil
4TXCD010 Coil
These matches ONLY
4-TON HP MODEL ONLY
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT
LINE LIFT (FEET)
LOWER
UPPER
MIDDLE
Dip Switch 1- ON
Dip Switch 2-ON
Dip Switch 3-ON
25
20
15
10
0
10 20 25 30 40 60 80
Max Lift
All approved, matched systems.
SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE
ALL AC MODELS
AND
3-TON HP MODELS 5-TON HP MODELS ONLY
SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
LOWER
Dip Switch 1- ON
MIDDLE
Dip Switch 2-ON
Dip Switch 3-ON
UPPER
Max Lift
25
20
15
10
0
10 20 25 30 40 60 80
Dip Switch 3-ON
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
Max Lift
25
20
15
10
0
10 20 25 30 40 60 80
4TEE3_10 Downflow & Horizontal Left Only
All other approved, matched systems.