Air handler configuration
These air handler units are ready to install in any position shown in
. Some XAH model coils require a section of duct between the
indoor coil and the modular air handler. See
.
H
orizontal right applications
An pan extension to reduce the risk of condensate blow-off is provided
with certain models of XAH indoor coils. It is essential to construct, insu
-
late, and attach a 6 in. length duct extension between the XAH coil cas
-
ing and the modular air handler casing to allow enough room to install
the pan extension. The suggested method is as follows:
Note:
This method consists of two identical field fabricated duct sections.
1. Attach one duct section to the leaving air end of the XAH indoor coil.
2. Attach the other duct section to the entering air end of the modular
air handler.
3. Attach the two sections together using s-lock and drive cleats. See
.
Note:
A = modular air handler width (see column B in
)
Air handler and coil upflow, downflow, and horizontal posi
-
tions where not using a pan extension
1.
Apply the neoprene gasket to the return air end of the air handler.
2.
Attach three tie plates to the external sides and back of the air han
-
dler casing using screws.
3.
Position the air handler casing over the appropriate coil opening
(depending on configuration). See
4.
Attach the three tie plates to the coil casing using screws.
5.
Remove the coil access panel.
6.
Slide the coil out of the coil cabinet and set the coil to the side.
7.
Locate the 2 in. wide foam gasket.
8.
Apply the foam gasket over the air handler and coil mating seams
on the interior of both unit sides and back.
9. Slide the coil into the housing and install the coil access panel and
coil filter door.Horizontal suspension
Horizontal suspension
It is possible to suspend these air handlers in horizontal applications.
Use angle steel support brackets with minimum 3/8 in. threaded rods,
supporting the unit from the bottom. Attach the threaded rods at the
locations shown in
or
, leaving enough clearance
between the door and the rod so that doors can be removed for service.
Figure 3:
Typical installation
Figure 4:
Duct section - modular air handler - horizontal right
A1711-001
Upflow
Downflow
Horizontal right
Horizontal left
A
A1762-001
3.5 in.
1 in. flange in
1 in. duct liner
S-lock
Drive cleat
20.5 in.
CAUTION
Do not lift the air handler by the cabinet brace. The cabinet brace is
held in place by the coil channel. The cabinet brace could become
disengaged from the cabinet causing the air handler to fall, potentially
causing injury or damaging property. Refer to
Figure 1
in the
Installa
-
tion Manual
for the location of the cabinet braces.
NOTICE
When assembling the support structure, size to provide clearance for
access door removal.
Figure 5:
Suspension support locations for horizontal applications that
do not require the drain pan extension
Figure 6:
Suspension support locations for horizontal applications that
require the drain pan extension
!
A1771-001
21 3/4 in.
1 1/2 in.
1 in.
Minimum 3/8 in. threaded rod
Minimum 1 1/2 in. x 1 1/2 in.
(Angle recommended length 26
in. minimum with 2 in. clearance
on both sides of the air handler)
1 in.
1 1/2 in.
21 3/4 in.
Minimum 3/8 in. threaded rod
Minimum 1 1/2 in. x 1 1/2 in.
(Angle recommended length 26
in. minimum with 2 in. clearance
on both sides of the air handler)
A1769-001
28 3/4 in.
1 1/2 in.
1 in.
Minimum 3/8 in.
threaded rod
Minimum
1 1/2 in. x 1 1/2 in.
(Angle recommended
length 26 in. minimum with
2 in. clearance on both
sides of the air handler)
This document does not replace the Installation Manual
,
which must be referred to for detailed information.
Notes:
1. The controls may require correct polarity on the power supply and a adequate ground.
2. These units are rated for use with single and three phase 208 V or 230 V supply power.
3. Use flexible duct connectors.
4. Supply air ductwork must remain the size of the supply opening for the first 12 in. before transition to the correct duct size.
5. The return and supply duct may be fastened to the bottom or sides of the air handler using screws no longer than 1/2 in..
6. Line voltage electrical knockouts are available on the left top and left casing side. Refer to the
Installation Manual
for information on correct sizing
of overcurrent protection and supply wire sizes.
7. Low voltage electrical knockouts are available on the right top and right casing side.
8. Seal electrical openings and duct connections to prevent air infiltration.
9. If installing the air handler above a finished ceiling, use a secondary drain pan.
10. It is necessary to trap condensate drain pans and slope them toward the drain.
11. At start up, measure the external duct static and adjust the blower speed accordingly.
A1712-001
B
20 1/2 in.
21 1/2 in.
F
A
D
12 3/16 in.
19 1/8 in.
C
E
Bottom inlet
dimensions
Service
disconnect panel
Top outlet
dimensions
Figure 1:
Dimensions
Table 1:
Dimensions
1
Models
Dimensions
Wiring knockouts
2
A
B
C
D
E
F
Height (in.)
Width (in.)
Opening widths (in.)
Power (in.)
Control (in.)
JMET08BS2N1
22 3/4
17 1/2
16 1/2
16 1/2
7/8 (1/2)
1 3/8 (1)
1 23/32 (1 1/4)
7/8 (1/2)
JMET12BS2N1
22 3/4
17 1/2
16 1/2
16 1/2
JMET12CS2N1
22 3/4
21
20
20
JMET16CS2N1
22 3/4
21
20
20
JMET18DS2N1
22 3/4
24 1/2
23 1/2
23 1/2
1. All dimensions are in inches.
2. Actual size (conduit size)
Subject to change without notice. Published in U.S.A.
6139713-URG-B-0123
Copyright © 2023 by Johnson Controls, Inc. All rights reserved.
Supersedes: 6139713-URG-A-0422
York International Corp.
5005 York Drive
Norman, OK 73069
Quick Reference Guide
Standard ECM modular multi-position
residential air handlers
