York JHE18B5 B2SS Series Quick Reference Manual

Clearances
It is essential to provide the following clearances:
• Maintenance and servicing access - minimum 36 in. from the front
of the unit for blower motor or coil replacement.
• The supply air ductwork connected to this unit is designed for 1 in.
clearance for the first 18 in. of combustible materials if an electric
heat kit is installed.
• A combustible floor base accessory is available for downflow appli-
cations of this unit, if required by local code.
Adjusting the air system
1. To prepare the coil for static pressure measurements, run only the
fan to ensure a dry coil.
2. Drill two holes, one 12 in. away from the air handler in the supply air
duct and one 12 in. away from the air handler in the return air duct,
before any elbows in the ductwork.
3. Insert the static pressure tips and energize the blower motor.
4. Measure the supply air static pressure. Record this positive
number.
5. Measure the return air static pressure. Record this negative
number.
Note: You must take the return air static pressure reading after the
air filter but before the indoor coil.
6. Treat the negative number as a positive, and add the two numbers
together to determine the total external system static pressure.
7. See Table 2 to determine the airflow and make the necessary adjust-
ments to keep the CFM within the airflow limitations of the coil.
Take measurements here if using a filter rack.
Return air static must be taken between the filter and indoor coil.
A1704-001
Figure 2: Duct static measurements
Configuring the unit
These air handlers are supplied ready to install in an upflow or horizontal
left position, and you can convert these air handlers for installation in a
downflow or horizontal right position. See Figure 3.
Upflow Downflow Horizontal right
Heat kit
Horizontal left
Heat kit
Figure 3: Typical installation
NOTICE
Convert the air handler to the required orientation before installation.
Conversion must be made before brazing the refrigerant connections
to the coil.
Subject to change without notice. Published in U.S.A.
Copyright © 2024 by Johnson Controls. All rights reserved.
York International Corp.
To convert the air handler for downflow or horizontal right use:
1. Remove the coil and blower access panel.
2. Remove the RDS control board cover and disconnect the A2L refrig-
erant sensor wire from the control board so that the sensor can be
removed with the coil without detaching the sensor from the coil.
3. Slide the coil and drain pan assembly out of the air handler cabinet.
4. Turn the air handler cabinet upside down so that it is in the downflow
position.
5. If installing a 48C5CG or 60C5CH model in a horizontal right posi-
tion, install the horizontal baffle plate shipped with the unit. The hori-
zontal baffle plate must be secured to the coil delta plates. Refer to
Installing a horizontal baffle plate in the Installation Manual.
6. After installing a horizontal baffle plate, if applicable, slide the coil
and drain pan assembly back into the air handler cabinet.
7. Route the A2L refrigerant sensor wire out of the coil compartment by
passing through the opening for it in the tubing access panel. Refer
to Figure 15 in the Installation Manual. Install the included grommet
to protect the sensor wire. Route the sensor wire into the air handler
cabinet low-voltage wiring opening and back into the RDS control
box. Re-connect the sensor to the control.
8. Reattach the access panels.
Suspending the unit in horizontal applications
You can 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 Figure 4, leaving enough clearance between the door and the rod so
that doors can be removed for service.
CAUTION
!
Do not lift the air handler by the cabinet braces. The cabinet braces
could become disengaged from the cabinet causing the air handler to
fall, potentially causing injury or damaging property. Refer to Figure 6
in the Installation Manual for the location of the cabinet braces. Lift
the air handler by tightly gripping the casing.
NOTICE
When assembling the support structure, size to provide clearance for
access door removal.
Min. 3/8 in.
threaded rod
Min. 1 1/2 in. x 1 1/2 in.
(angle recommended
length 26 in. min. with
2 in. clearance on both
sides of air handler)
1 1/2 in. 1 1/2 in.
21 3/4 in.
A
Min. 3/8 in.
threaded rod
Min. 1 1/2 in. x 1 1/2 in.
(angle recommended
length 26 in. min. with
2 in. clearance on both
A2068-001
sides of air handler)
1 1/2 in. 1 1/2 in.
21 3/4 in.
A
Figure 4: Suspension support locations for horizontal applications
6404623-URG-B-0524
Supersedes: 6404623-URG-A-0424
5005 York Drive
Norman, OK 73069
Quick Reference Guide
Standard ECM Single-Piece Multi-Position
Risk of fire
This unit uses a mildly flammable (A2L) refrigerant. The unit must only be repaired or serviced by trained service personnel. Before attempting to repair or service the unit,
consult the Installation Manual. Follow all safety precautions.
This document does not replace the Installation Manual, which must be referred to for detailed information.
Blower compartment
Coil compartment
15 in.
1 1/2 in.
Figure 1: Dimensions
1
Table 1: Dimensions
Models
A
Height (in.)
JHE18B5*B2SS 45 5/8
JHE24B5*C2SS 48 3/8
JHE30B5*D2SS 48 3/8
JHE36B5*D2SS 48 3/8
JHE36C5*D2SS 49 5/8
JHE42C5*F2SS 55 5/8
JHE48C5*G2SS 60
JHE48D5*G2SS 60
JHE60C5*H2SS 61 6/8
JHE60D5*H2SS 61 6/8
JHE60D5*J2SS 60
1. All dimensions are in inches.
2. Actual size (conduit size)
Notes:
A2139-001
• The controls may require correct polarity on the power supply and an adequate ground.
• These units are rated for use with single-phase and three-phase 208 V or 230 V supply power.
• Use flexible duct connectors.
• Supply air ductwork must remain the size of the supply opening for the first 12 in. before transition to the correct duct size.
• 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.
• 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 pro-
tection and supply wire sizes.
• Low-voltage electrical knockouts are available on the right top and right casing side.
• Seal electrical openings and duct connections to prevent air infiltration.
• If installing the air handler above a finished ceiling, use a secondary drain pan.
• It is necessary to trap condensate drain pans and slope them toward the drain.
• At start up, measure the external duct static and adjust the blower speed accordingly.
Air Handlers
CAUTION
!
Refrigerant connections
Drain connections for upflow applications
Service
disconnect
panel
Bottom inlet
dimensions
18 5/8 in.
20 1/2 in.
21 7/16 in.
Dimensions Wiring knockouts
B C D E F
Width (in.) Opening widths (in.) Power (in.)
17 1/2 7 1/2 16 1/2 16 1/2
17 1/2 10 16 1/2 16 1/2
17 1/2 10 16 1/2 16 1/2
17 1/2 10 16 1/2 16 1/2
21 11 1/2 20 20
7/8 (1/2)
21 17 1/2 20 20 1 3/8 (1)
1 23/32 (1 1/4)
21 21 3/4 20 20
24 1/2 21 3/4 23 1/2 23 1/2
21 23 1/2 20 20
24 1/2 23 1/2 23 1/2 23 1/2
24 1/2 21 3/4 23 1/2 23 1/2
Top outlet
dimensions
12 3/16 in.
A2161-001
2
Refrigerant connections line
size
G
Control (in.) Liquid (in.) Vapor (in.)
3/4
7/8 (1/2) 3/8
7/8