York RFCB18BXEMP2S1 Quick Reference Manual

Air handler configuration
These air handler units are supplied ready to install in an upflow or
horizontal left position. See Figure 3. If the unit requires either downflow or
horizontal right airflow configurations, the unit must have the coil assembly
repositioned. See Downflow or horizontal right conversion.
Upflow Downflow Horizontal right
Heat kit
Horizontal left
Heat kit
Figure 3: Typical installation
Downflow or horizontal right conversion
NOTICE
Convert the air handler to the desired orientation prior to installation.
Conversion must be made before brazing the refrigerant connections
to the coil.
NOTICE
These models are shipped with a horizontal baffle plate. Remove and
retain this plate for horizontal right application. Discard for all other
applications.
1. Remove the coil access panel.
2. Slide the coil and drain pan assembly out of the air handler.
3. Turn the air handler cabinet upside down (downflow position).
4. If installing the unit in a horizontal right position, the following models
require installation of a horizontal baffle plate shipped with the unit:
C48G and C60H. The horizontal baffle plate must be secured to the
coil delta plates. See Installing a horizontal baffle plate.
5. Slide the coil back into the cabinet.
6. Install the coil access panel. Conversion is now complete.
Installing a horizontal baffle plate
1. With the coil removed from the air handling unit and laying on its hor-
izontal drain pan, locate the pre-drilled holes in the front and rear coil
delta plates.
2. Insert the horizontal baffle plate into the end of the coil. Insert one end of
the horizontal baffle plate into the top side of the primary drain pan as
shown in Figure 5 in the Installation Manual.
3. Secure the horizontal baffle plate in place with two screws, one in the
front delta plate and one in the rear delta plate.
Horizontal left applications (all models)
Air handling units are supplied ready to install in a horizontal left position.
A horizontal drain pan is factory installed. Refer to the Installation Manual
for further installation instructions.
Subject to change without notice. Published in U.S.A.
Copyright © 2021 by Johnson Controls, Inc. All rights reserved.
York International Corp.
Norman, OK 73069
Positioning the unit in horizontal applications
Set the unit so that it is sloped 1/4 in. towards the drain line connection.
Horizontal suspension
These air handlers may be suspended 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 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
A1701-001
When assembling the support structure, size to provide clearance for
access door removal.
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)
2 in.
X
H
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 1/2 in.
X
H
Figure 4: Suspension support locations
Table 4: Horizontal suspension dimensions
Air handler cabinet size X (in.)
B18B 21 3/4
B24C/B30D/B36D 21 3/4
C36D 21 3/4
C42F 21 3/4
C48G/D48G/D60J 21 3/4
C60H/D60H 21 3/4
6112629-URG-A-1021
5005 York Drive
This document does not replace the Installation Manual, which must be referred to for detailed information.
Blower compartment
Coil compartment
1 1/2 in.
Figure 1: Dimensions
Table 1: Dimensions
Models
1 1/2 in.
RFCB18BXEMP2S1
RFCB24CXEMP2N1
RFCB30DXEMP2N1
A1695-001
RFCB36DXEMP2N1
RFCC36DXEMP2N1
RFCC42FXEMP2N1
H (in.)
RFCC48GXEMP2N1
47
RFCD48GXEMP2N1
49 5/8
RFCC60HXEMP2N1
51
RFCD60HXEMP2N1
57
RFCD60JXEMP2N1
61 1/4
1. All dimensions are in inches.
63
2. Actual size (conduit size)
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.
Supersedes: None
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.
Quick Reference Guide
Single-piece ECM multi-position
residential air handlers
Refrigerant connections
F
Drain connections for upflow applications
G
Service
disconnect panel
A
C
15 in.
Bottom inlet
dimensions
1 1/2 in.
Filter access
B 20 1/2 in.
21 7/16 in.
1
Dimensions
A B C D E
Height (in.) Width (in.) Opening widths (in.)
47 17 1/2 7 1/2 16 1/2 16 1/2
49 5/8 17 1/2 10 16 1/2 16 1/2
49 5/8 17 1/2 10 16 1/2 16 1/2
49 5/8 17 1/2 10 16 1/2 16 1/2
51 21 11 1/2 20 20
57 21 17 1/2 20 20
61 1/4 21 21 3/4 20 20
61 1/4 24 1/2 21 3/4 23 1/2 23 1/2
63 21 23 1/2 20 20
63 24 1/2 23 1/2 23 1/2 23 1/2
61 1/4 24 1/2 21 3/4 23 1/2 23 1/2
Top outlet
dimensions
12 3/16 in.
E
18 5/8 in.
D
A1694-001
2
Wiring knockouts Refrigerant
connections line size
F G
Power (in.) Control (in.) Liquid (in.) Vapor (in.)
3/4
7/8 (1/2)
1 3/8 (1) 7/8 (1/2) 3/8
1 23/32 (1 1/4)
7/8