Johnson Controls XAF Series User manual

Johnson Controls Ducted Systems
Installation Manual: XAF, XAH, and XAU
Series - Full Cased and Uncased Coils for
Cooling and Heat Pumps
XAF - full-cased upflow or downflow, XAH - full-cased
horizontal left or right, and XAU - uncased upflow or
downflow
York International Corporation, 5005 York
Drive, Norman, OK 73069
2021-07-12
5997451-UIM-A-0721
Supersedes: Nothing
A

2 Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps
Johnson Controls Ducted Systems

Contents
ContentsGeneral.................................................................................... 5
Certification............................................................................ 5
Safety....................................................................................... 5
Inspection......................................................................... 6
Clearances......................................................................... 6
Limitations...................................................................... 12
Installation overview........................................................... 12
Using a coil metering device.............................................. 12
Installing a piston.......................................................... 13
Installing a TXV............................................................... 14
Using a coil equipped with an EEV: XAF and XAH
coils................................................................................... 16
Installing the coil: XAF and XAH coils................................ 18
Using the duct flanges: XAF and XAH coils................. 18
Positioning the unit in horizontal applications: XAH
coils................................................................................... 20
Repositioning the transition angle for downflow or
horizontal right application with a furnace: XAF and
XAH coils........................................................................... 20
Horizontal right and left applications: XAH coils........ 20
Installing the coil: XAU coils............................................... 22
Critical coil projection: XAU coils.................................. 26
Connecting the duct system............................................... 26
Connecting the condensate drain..................................... 27
Connecting refrigerant lines.............................................. 27
Cleaning the coil.................................................................. 29
Adjusting the air system..................................................... 29
Instructing the homeowner............................................... 33
Installation verification....................................................... 33
Johnson Controls Ducted Systems
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 3

4 Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps
Johnson Controls Ducted Systems

General
Read all sections of this manual and keep the manual for
future reference.
WARNING: Cancer and Reproductive Harm –
www.P65Warnings.ca.gov.
This installation manual covers the following:
• Installation of XAF and XAH coils with furnaces or
JMET and JMVT modular air handlers
• Installation of XAU coils with 80+% AFUE furnaces
and 90+% AFUE furnaces
XAF, XAH, and XAU coils have sweat connect fittings. The
coils are shipped with a low psi nitrogen charge. See
Figure 1 and Figure 2.
Certification
Safety
This is a safety alert symbol. When you see this
symbol on labels or in manuals, be alert to the
potential for personal injury.
Understand and pay particular attention to the signal
words DANGER, WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation,
which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation,
which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation,
which, if not avoided may result in minor or moderate
injury. It is also used to alert against unsafe practices and
hazards involving only property damage.
WARNING
Improper installation may create a condition where the
operation of the product could cause personal injury
or property damage. Improper installation, adjustment,
alteration, service, or maintenance can cause injury or
property damage. Refer to this manual for assistance.
For additional information, consult a qualified installer
or service agency.
CAUTION
This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state, and national codes including
but not limited to building, electrical, and mechanical
codes.
WARNING
The furnace area must not be used as a broom
closet or for any other storage purposes, as a fire
hazard may be created. Never store items such as the
following on, near, or in contact with the furnace.
1. Spray or aerosol cans, rags, brooms, dust mops,
vacuum cleaners, or other cleaning tools
2. Soap powders, bleaches, waxes or other cleaning
compounds; plastic items or containers; gasoline,
kerosene, cigarette lighter fluid, dry cleaning fluids or
other volatile fluid
3. Paint thinners and other painting compounds
4. Paper bags, boxes, or other paper products
Never operate the furnace with the blower door
removed. To do so could result in serious personal
injury and/or equipment damage.
WARNING
This appliance is not intended for use by persons
(including children) with reduced physical, sensory,
or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a
person responsible for their safety.
Children must be supervised to ensure that they do
not play with the appliance.
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 5
Johnson Controls Ducted Systems

NOTICE
To ensure a correct match for this indoor product,
refer to the current Tabular Data Sheet for the outdoor
equipment selected for the system application. If
the indoor product model is not listed in the Tabular
Data Sheet included with the outdoor unit, to access
the current version of the Tabular Data Sheet, go to
the Residential Equipment & Supplies section of the
Offering Catalog at www.simplygettingthejobdone.com
or scan the QR code provided on the outdoor unit
rating plate.
NOTICE
If applying this coil with an oil furnace, a 6-in. long
section of duct is required between the furnace leaving
air opening and the entering air end of the coil.
Inspection
On receiving a coil, do the following:
• Check the coil to ensure it is still under pressure as
shown in Figure 1 or Figure 2.
• Inspect the coil for possible damage during transit.
If damage is evident, note the extent of the damage
on the carrier’s delivery receipt. Make a separate
request for inspection by the carrier’s agent in
writing. Consult your local distributor for more
information.
• Check the drain pan for cracks or breakage.
Figure 1: Pressure check - XAF and XAH
Figure 2: Pressure check - XAU
Note: Verify that the coil is under pressure when
received. Depress the Schrader valve core once to
check for pressure.
Clearances
During installation, it is important to be aware of
required clearances. See Table 1, Table 2, and Table 3 for
dimensions for indoor coils. Provide clearances for the
following:
• Refrigeration piping and connections
• Maintenance and servicing access, including access
for cleaning the coil
• Condensate drain line
• Removal of the coil assembly
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps6
Johnson Controls Ducted Systems

Figure 3: Component location - XAF upflow or downflow full-cased coil
Figure 4: Dimensions - XAF upflow or downflow full-cased coil
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 7
Johnson Controls Ducted Systems

Table 1: Dimensions - XAF upflow or downflow full-cased coil
Dimensions
Height Width Opening widths Refrigerant connections line size
Models
A (in.) B (in.) C (in.) D (in.) Liquid (in.) Vapor (in.)
XAFA18AXXN1* 19 1/2 14 1/2 13 1/2 13 1/2
XAFA18ABAN1 19 1/2 14 1/2 13 1/2 13 1/2
XAFB18AXXN1* 19 17 1/2 16 1/2 16 1/2
XAFB18ABAN1 19 17 1/2 16 1/2 16 1/2
XAFA24BXXN1* 21 5/8 14 1/2 13 1/2 13 1/2
XAFA24BBAN1 21 5/8 14 1/2 13 1/2 13 1/2
XAFB24BXXN1* 23 17 1/2 16 1/2 16 1/2
XAFB24BBAN1 23 17 1/2 16 1/2 16 1/2
XAFB30CXXN1* 25 5/8 17 1/2 16 1/2 16 1/2
XAFB30CBAN1 25 5/8 17 1/2 16 1/2 16 1/2
XAFC30CXXN1* 23 21 20 20
XAFC30CBAN1 23 21 20 20
XAFA30DXXN1* 25 1/2 14 1/2 13 1/2 13 1/2
XAFA30DBAN1 25 1/2 14 1/2 13 1/2 13 1/2
XAFB36DXXN1* 25 5/8 17 1/2 16 1/2 16 1/2
XAFB36DBAN1 25 5/8 17 1/2 16 1/2 16 1/2
XAFB36DBCN1 25 5/8 17 1/2 16 1/2 16 1/2
XAFC36DXXN1* 23 21 20 20
XAFC36DBAN1 23 21 20 20
XAFC36DBCN1 23 21 20 20
3/4
XAFB36EXXN1* 25 5/8 17 1/2 16 1/2 16 1/2
XAFB36EBCN1 25 5/8 17 1/2 16 1/2 16 1/2
XAFC42EXXN1* 25 21 20 20
XAFC42EBCN1 25 21 20 20
XAFD42EXXN1* 25 24 1/2 23 1/2 23 1/2
XAFD42EBCN1 25 24 1/2 23 1/2 23 1/2
XAFC48FXXN1* 27 21 20 20
XAFC48FBAN1 27 21 20 20
XAFC48FBCN1 27 21 20 20
XAFD48FXXN1* 27 24 1/2 23 1/2 23 1/2
XAFD48FBAN1 27 24 1/2 23 1/2 23 1/2
XAFD48FBCN1 27 24 1/2 23 1/2 23 1/2
XAFC60GXXN1* 33 21 20 20
XAFC60GBAN1 33 21 20 20
XAFC60GBCN1 33 21 20 20
XAFD60GXXN1* 32 3/4 24 1/2 23 1/2 23 1/2
XAFD60GBAN1 32 3/4 24 1/2 23 1/2 23 1/2
XAFD60GBCN1 32 3/4 24 1/2 23 1/2 23 1/2
XAFC60HXXN1* 37 1/4 21 20 20
XAFC60HBCN1 37 1/4 21 20 20
XAFD60HXXN1* 37 1/4 24 1/2 23 1/2 23 1/2
XAFD60HBCN1 37 1/4 24 1/2 23 1/2 23 1/2
XAFD60JXXN1* 32 3/4 24 1/2 23 1/2 23 1/2
XAFD60JBCN1 32 3/4 24 1/2 23 1/2 23 1/2
3/8
7/8
Note:
• * denotes coil models available with a factory installed thermal expansion valve (TXV).
• Refrigerant line sizes may require larger lines for extended line lengths. Refer to application data part number
247077.
• The adapter fitting must be field installed for any refrigeration piping sizes not shown in the table.
• Refer to the Technical Guide for the outdoor unit for the proper refrigeration piping size.
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps8
Johnson Controls Ducted Systems

Figure 5: Component location - XAH full-cased horizontal left or right coil
Figure 6: Dimensions - XAH full-cased horizontal left or right coil
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 9
Johnson Controls Ducted Systems

Table 2: Dimensions - XAH full-cased horizontal left or right coil
Dimensions
Width Height Opening heights Refrigerant connections line size
Models
A (in.) B (in.) C (in.) D (in.) Liquid (in.) Vapor (in.)
XAHA18AXXN1* 23 14 1/2 13 1/2 13 1/2
XAHA18ABAN1 23 14 1/2 13 1/2 13 1/2
XAHA24BXXN1* 23 14 1/2 13 1/2 13 1/2
XAHA24BBAN1 23 14 1/2 13 1/2 13 1/2
XAHB24BXXN1* 23 17 1/2 16 1/2 16 1/2
XAHB24BBAN1 23 17 1/2 16 1/2 16 1/2
XAHB30CXXN1* 25 5/8 17 1/2 16 1/2 16 1/2
XAHB30CBAN1 25 5/8 17 1/2 16 1/2 16 1/2
XAHC30CXXN1* 27 21 20 20
XAHC30CBAN1 27 21 20 20
XAHB36DXXN1* 25 5/8 17 1/2 16 1/2 16 1/2
XAHB36DBAN1 25 5/8 17 1/2 16 1/2 16 1/2
XAHB36DBCN1 25 5/8 17 1/2 16 1/2 16 1/2
XAHC36DXXN1* 27 21 20 20
XAHC36DBAN1 27 21 20 20
XAHC36DBCN1 27 21 20 20
XAHC42EXXN1* 28 3/4 21 20 20
XAHC42EBCN1 28 3/4 21 20 20
XAHD42EXXN1* 32 3/4 24 1/2 23 1/2 23 1/2
XAHD42EBCN1 32 3/4 24 1/2 23 1/2 23 1/2
3/4
XAHC48FXXN1* 33 21 20 20
XAHC48FBAN1 33 21 20 20
XAHC48FBCN1 33 21 20 20
XAHD48FXXN1* 32 3/4 24 1/2 23 1/2 23 1/2
XAHD48FBAN1 32 3/4 24 1/2 23 1/2 23 1/2
XAHD48FBCN1 32 3/4 24 1/2 23 1/2 23 1/2
XAHC60GXXN1* 37 1/4 21 20 20
XAHC60GBAN1 37 1/4 21 20 20
XAHC60GBCN1 37 1/4 24 1/2 23 1/2 23 1/2
XAHD60GXXN1* 37 1/4 24 1/2 23 1/2 23 1/2
XAHD60GBAN1 37 1/4 24 1/2 23 1/2 23 1/2
XAHD60GBCN1 37 1/4 24 1/2 23 1/2 23 1/2
XAHC60HXXN1* 39 21 20 20
XAHC60HBCN1 39 21 20 20
XAHD60HXXN1* 39 24 1/2 23 1/2 23 1/2
XAHD60HBCN1 39 24 1/2 23 1/2 23 1/2
XAHD60JXXN1* 37 1/4 24 1/2 23 1/2 23 1/2
XAHD60JBCN1 37 1/4 24 1/2 23 1/2 23 1/2
3/8
7/8
Note:
• * denotes coil models available with a factory installed thermal expansion valve (TXV).
• Refrigerant line sizes may require larger lines for extended line lengths. Refer to application data part number
247077.
• The adapter fitting must be field installed for any refrigeration piping sizes not shown in the table.
• Refer to the Technical Guide for the outdoor unit for the proper refrigeration piping size.
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps10
Johnson Controls Ducted Systems

Figure 7: Component location with access panel removed - XAF and XAH coils
Figure 8: Component location - XAU uncased upflow or
downflow coil
Figure 9: Dimensions - XAU uncased upflow or
downflow coil
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 11
Johnson Controls Ducted Systems

Table 3: Dimensions - XAU uncased upflow or
downflow coil
Dimensions
Height Width
Refrigerant
connections
line size
Models
A (in.) B (in.) Liquid
(in.)
Vapor
(in.)
XAUA18AXXN1 16 5/8 13
XAUA24BXXN1 18 3/4 13
XAUB30CXXN1 21 1/4 16
XAUB36DXXN1 21 1/2 16
3/4
XAUC42EXXN1 23 19 1/2
XAUC48FXXN1 25 19 1/2
XAUC60GXXN1 29 1/4 19 1/2
XAUD60GXXN1 28 3/4 23
XAUD60HXXN1 33 23
3/8
7/8
Note:
• Refrigerant line sizes may require larger lines
for extended line lengths. Refer to application
data part number 247077.
• The adapter fitting must be field installed for
any refrigeration piping sizes not shown in the
table.
• Refer to the Technical Guide for the outdoor unit
for the proper refrigeration piping size.
Limitations
Install the coil in accordance with all national and local
safety codes. See Table 4.
Table 4: Coil airflow limits
CFM limits
Coil size Outdoor
unit (ton) Minimum Maximum
18 1 1/2 525 675
1 1/2 525 675
24 2 700 900
2 700 900
30 2 1/2 875 1125
2 1/2 875 1125
36 3 1050 1350
3 1050 1350
42 3 1/2 1225 1575
3 1050 1350
3 1/2 1225 157548
4 1400 1800
4 1600 1800
60 5 1750 2250
Installation overview
1. Before installation, review the installation aids
available in Installation verification. During
installation, use the installation aids to verify that
tasks are completed as required. See Figure 7 for an
overview of components and their location.
2. Install the coil metering device as required. See
Using a coil metering device.
3. Install the coil. See Installing the coil: XAF and XAH
coils or Installing the coil: XAU coils.
4. Connect the duct system. See Connecting the duct
system.
5. Connect the condensate drain lines. See Connecting
the condensate drain.
6. Connect the refrigerant lines. See Connecting
refrigerant lines.
7. Clean the coil. See Cleaning the coil.
8. Check and adjust airflow as required. See Adjusting
the air system.
9. Instruct the homeowner as needed. See Instructing
the homeowner.
Using a coil metering device
You must install a piston or TXV (flex coil models) in the
field, unless you are using a coil with a factory installed
TXV or a coil equipped with an electronic expansion valve
(EEV). See Using a coil equipped with an EEV: XAF and XAH
coils. Refer to the Technical Guide for outdoor units for
information on the piston or TXV required for the indoor
coil. It is best practice to install the piston or TXV kit before
installing the coil and brazing the refrigeration piping.
Note: Do not install the TXV sensing bulb until you
have completed the brazing and the piping has
cooled.
For TXV installation, refer to the Installation Manual
provided with the TXV kit and see Installing a TXV.
For piston installation, see Installing a piston. The piston
and the Schrader valve core are supplied with the outdoor
unit if applicable. Some outdoor sections require a TXV. If
using a piston instead of a TXV, install the Schrader valve
core in the suction line equalizer connection port and cap
the Schrader valve core with the plastic cap supplied. Do
not install the Schrader valve core if a TXV is installed,
because the TXV equalizer line attaches to the equalizer
connection port or suction line port.
CAUTION
COIL UNDER PRESSURE
Verify that pressure has been released by depressing
Schrader valve core shown in Figure 1 and Figure
2. The coil requires a metering device to be added.
Refer to outdoor unit documentation for correct TXV
or piston to be used.
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps12
Johnson Controls Ducted Systems

NOTICE
To prevent moisture and contaminates from entering
the system, the coil should not be open to atmosphere
for extended periods of time. If the coil cannot be
brazed into the refrigeration system during a routine
installation period, the ends should be temporarily
closed or plugged. For a short term delay, use
masking tape over the ends of the copper tubing to
close the tube from the air. For a longer term delay,
use plugs or caps. There is no need to purge the coil if
this procedure is followed.
Installing a piston
About this task:
WARNING
Failure to install Schrader valve core in the vapor line
equalizer connection port for piston applications could
result in total refrigerant loss of the system.
Follow these steps to install a Schrader valve core and
piston on XAF, XAH, or XAU coils.
1. When the holding charge is completely discharged,
remove the black plastic cap from the equalizer
connection port on the vertical part of the vapor
line.
2. Adjust the distributor position to allow the
preformed liquid line assembly to correctly line up
with the hole in the tubing access panel. Raise the
distributor body approximately 2 in. toward the top
of the coil or what would be the top of the coil if
the coil was in the upflow position, and adjust as
necessary. See Figure 10.
3. Install the Schrader valve core supplied with the
outdoor unit into the equalizer fitting connection
port using a valve core tool.
4. Loosen and remove the liquid line connection nut
and the sealing disc from the distributor assembly.
Note: The fitting has right-hand threads.
5. Slide the nut over the liquid line that is being
installed and discard the seal disc.
6. Install the required size piston into the distributor.
Refer to the Tabular Data Sheet for information on
the specific piston size and indoor coil matchup.
See Figure 11.
7. Verify that the PTFE washer is still in place in the
distributor opening. See Figure 11.
Figure 10: Recommended distributor adjustment
Figure 11: Piston installation
CAUTION
Do not over torque. Do not use slip joint pliers. This
will distort the aluminum distributor and the brass
fitting (potentially causing leaks).
8. When the piston is installed, install the liquid line to
the top of the piston or distributor assembly. Hand
tighten and turn an additional 1/4 turn to seal.
Note: Do not overtighten the fittings.
9. Replace the black plastic cap on the unused
equalizer fitting connection port.
10. When the refrigeration piping is installed, leak test
the system.
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 13
Johnson Controls Ducted Systems

Installing a TXV
About this task:
CAUTION
Outdoor unit model numbers ending with an H have a
factory installed hard start kit, required when installing
a TXV. Outdoor unit model numbers with no H ending
may require a hard start kit. Refer to the Technical
Guide or Tabular Data Sheet for the outdoor unit.
The following are basic steps for installing a TXV kit on
XAF, XAH, or XAU coils. For detailed instructions, refer to
the Installation Manual provided with the TXV kit.
Important: Refer to the Technical Guide or Tabular
Data Sheet for the outdoor section to determine the
correct TXV kit to use on this product.
1. Relieve the holding charge by depressing the
Schrader valve core on the suction manifold stub
out.
2. When the holding charge is completely discharged,
loosen and remove the Schrader valve core.
3. Place a backup wrench on the distributor, and
loosen and remove the brass distributor nut. Retain
the brass nut for use on the liquid line. Keep the
PTFE washer in place and discard the sealing disk.
4. Install the TXV onto the distributor assembly with
the supplied fittings. Ensure the PTFE washer is
seated in the distributor. Hand tighten and turn an
additional 1/4 turn to seal. See Figure 12.
Note: Do not overtighten the fittings.
CAUTION
Do not over torque. Do not use slip joint pliers. This
will distort the aluminum distributor and the brass
fitting (potentially causing leaks).
5. Slide the nut removed in Step 3 over the supplied
liquid line. Place the supplied PTFE washer from
the TXV kit in place on the TXV and install the liquid
line to the top of the TXV. Adjust the distributor
assembly so the liquid line aligns with the hole in
the access panel. See Figure 12. Hand tighten the
liquid line and apply an additional 1/4 turn to seal.
CAUTION
The Schrader valve core must not be installed into
the suction line TXV equalizer line fitting. Poor system
performance or system failure could result.
Figure 12: TXV installation
6. Install the TXV equalizer line onto the vapor line by
hand tightening the 1/4-in. SAE coupling nut to the
equalizer fitting and apply an additional 1/3 turn to
seal. See Figure 13.
CAUTION
Mount the TXV temperature sensing bulb after the
vapor line is brazed and sufficiently cooled.
7. Route the temperature sensing bulb tube for the
TXV toward the vapor line header and the TXV
equalizer tube connection port on the vapor line
header.
8. Install the TXV bulb to the vapor line near the
TXV equalizer tube connection port, using the
bulb clamps supplied with the TXV assembly.
Ensure that the bulb is making maximum contact.
See Figure 13 and Figure 14 and adhere to the
following:
a. Install the TXV bulb on the vapor line suction
header near the TXV equalizer tube connection
port. Ensure that the bulb is installed at a 10
o’clock or 2 o’clock position.
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps14
Johnson Controls Ducted Systems

b. Insulate the TXV bulb using the thermal
insulation provided to protect it from the effect
of the surrounding ambient temperature.
Cover the bulb completely to insulate it.
Figure 13: TXV bulb and equalizer line installation
9. When the refrigeration piping is installed, leak test
the system.
Figure 14: Correct bulb location for TXV
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 15
Johnson Controls Ducted Systems

Using a coil equipped with an EEV: XAF
and XAH coils
XAF and XAH coils equipped with an EEV are available for
use with a fully modulating matched system. The EEV and
controls are factory installed. See Figure 18 You only have
to connect the communication (4-wire) cable included
to the communicating 4-pin connector on the furnace or
modular blower control board. See Figure 15 and Figure
16 for the connection diagrams, and see Figure 17 for the
wiring diagram.
Figure 15: Modulating EEV connection
Figure 16: Variable speed EEV connection
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps16
Johnson Controls Ducted Systems

Figure 17: Wiring diagram - EEV
Figure 18: XAF and XAH coils with an EEV installed
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 17
Johnson Controls Ducted Systems

Installing the coil: XAF and XAH coils
It is important to understand the following to install XAF
and XAH coils correctly:
• How to use the duct flanges if needed
• The requirements for different installation
applications
Using the duct flanges: XAF and XAH
coils
About this task: Duct flanges are built into the coil
cabinet or shipped with the coil (XAH only). If duct flanges
are necessary, complete the following steps:
Note: If you do not use the duct flanges, leave them
folded down (or uninstalled) as received from the
factory.
1. For integrated duct flanges, fold the flanges
outward and secure the flanges in place using
screws as shown in Figure 19. For field-installed
duct flanges (XAH only), attach the flanges
(shipped in the bag with the coil) as shown in
Figure 20.
2. Use the tie plates to secure the coil to the furnace
or modular air handler as shown in Figure 21,
Figure 22, Figure 23, or Figure 24.
NOTICE
For horizontal applications, the coil cabinet can
be installed so that it is slightly pitched toward the
front or drain connection end of coil. Ensure that
the horizontal pan drains water adequately before
completing the unit install.
Figure 19: Duct flanges - XAF and XAH coils
Figure 20: Field-installed duct flanges - XAH coils only
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps18
Johnson Controls Ducted Systems

Figure 21: Vertical upflow applications with furnaces
Figure 22: Vertical downflow applications with furnaces
Figure 23: Vertical upflow applications with modular air
handlers
Figure 24: Vertical downflow applications with modular air
handlers
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps 19
Johnson Controls Ducted Systems

Positioning the unit in horizontal
applications: XAH coils
• Set the unit so it is sloped 1/4 in. toward the drain
plug.
Repositioning the transition angle for
downflow or horizontal right application
with a furnace: XAF and XAH coils
About this task:
The coil cabinet has a factory installed transition angle
on the bottom front side of the cabinet. For downflow
or horizontal right applications with a furnace, you must
reposition this angle to the top front side of the cabinet.
Note: For installation with a modular air handling
unit, remove the transition angle and discard it.
1. Remove the two screws that fasten the transition
angle to the bottom front side of the cabinet.
2. Remove the two screws from the top front side of
the cabinet.
3. Remove the transition angle, rotate the transition
angle 180° end for end, and secure the transition
angle to the top front side of the cabinet.
Horizontal right and left applications:
XAH coils
See the following figures for an illustration of horizontal
right and left applications of XAH coils with furnaces and
modular air handlers.
Figure 25: XAH horizontal right application with
furnace
Figure 26: XAH horizontal left application with furnace
Figure 27: XAH horizontal right application with
modular air handler
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps20
Johnson Controls Ducted Systems