Rheem Manufacturing Company
7
RETURN AIR CABINETS
A
IN. [mm]
FILTER SIZE
IN. [mm]
RXGR-C17B
17
1
/
2
[445]
(2) 12 x 16 [305 x 406]
RXGR-C21B
21
1
/
4
[533]
(2) 20 x 16 [508 x 406]
RXGR-C24B
24
1
/
2
[622]
(2) 24 x 16 [610 x 406]
FILTER RACK FILTER SIZES† INCHES [mm]
MODEL
RGPR-
RXGF-CA
(SIDE)
05, 07*AMK
15
3
/
4
x 25
[400 x 635]
07*BRQ, 10
15
3
/
4
x 25
[400 x 635]
12
15
3
/
4
x 25
[400 x 635]
†Filter racks are shipped without filters.
Filters shipped with furnace may be used or a suitable 1” [25.4 mm] filter.
*Designates “E” or “N”.
THE RXGR-C24B MUST ONLY BE INSTALLED ON THE SIDE
OPPOSITE THE GAS AND ELECTRICAL CONNECTIONS.
WARNING: IMPORTANT NOTICE
A SOLID METAL BASE PLATE (SEE TABLE) MUST BE IN PLACE WHEN THE FURNACE
IS INSTALLED WITH SIDE AIR RETURN DUCTS. FAILURE TO INSTALL A BASE PLATE
COULD CAUSE PRODUCTS OF COMBUSTION TO BE CIRCULATED INTO THE LIVING
SPACE AND CREATE POTENTIALLY HAZARDOUS CONDITIONS.
FURNACE
BASE
WIDTH
SOLID BOTTOM
BASE
PLATE SIZE
IN. [mm]
KIT NO.
PLATE NO.
IN. [mm]
17
1
/
2
[445]
RXGB-D17
AE-61874-02
15
1
/
8
x 23
9
/
16
[384 x 598]
21
1
/
2
[533]
RXGB-D21
AE-61874-03
18
5
/
8
x 23
9
/
16
[473 x 598]
24
1
/
2
[622]
RXGB-D24
AE-61874-04
25
5
/
8
x 23
9
/
16
[651 x 598]
RXGW-B01 CHIMNEY ADAPTER
See Installation Instructions for application limitations.
FOR HIGH ALTITUDES:
HIGH ALTITUDE OPTION CODE:
U.S. & Canada – 278
HIGH ALTITUDE KIT:
RXGY-F13 (for all models)
NOTE:
High altitude kits and options do
NOT
include additional
burner orifices. If a burner orifice change is necessary, they
must be ordered through PROSTOCK
®.
. See Installation
instructions for more information.
Option — 278 furnaces are shipped with #51 DMS orifices
installed. This is one drill size smaller than standard furnaces to
account for expected average elevations and heating values typically
seen in these areas.
CAUTION:
Always follow National Fuel Gas Code (NFGC) guidelines
when converting furnaces for high altitudes.
For all installations above 2000 ft. (including all option — 278
models), the burner orifice size needs to be recalculated and
verified. A burner orifice change may still be required. See
Installation Instructions for more information.
NOTE:
For Canadian installations only, an optional derate (manifold
gas pressure reduction) method may be used to adjust the
furnace for altitude. See Installation Instructions for more
information. This optional method may
NOT
be used for U.S.
installations.
(U.S. Models—Kit packaged with furnace.
Requires field installation).
[
] Designates Metric Conversions
INTERNAL FILTER RACK FOR BOTTOM
OR SIDE RETURN:
RXGF-DA*
*Filters available through PROSTOCK
®
.
SIDE RETURN FILTER RACK:
RXGF-CA
BOTTOM RETURN FILTER RACK FOR
UPFLOW APPLICATION:
RXGF-CB
ACCESSORY RETURN
AIR CABINETS
Return Air Cabinets may
be installed on either side
application except RXGR-C24B
(side application must be
on side opposite gas and
electrical connections).
RXPF-F01 and F02
FOSSIL FUEL KIT
—is for use with Rheem Heat Pumps and
Super Quiet 80 warm air furnaces. RXPF-F02 also meets TVA
requirements.
ACCESSORIES—UPFLOW
