Installation Guidelines - Rheem RGFE Installation Instructions Manual

INSTALLATION GUIDELINES

IMPORTANT: When installed as a non-
direct furnace, only vertical terminations
are allowed. Do not use horizontal termi-
nations when the furnace is installed with
a non-direct vent.
All exhaust vent piping must be installed
in compliance with Part 7, Venting of
Equipment, of the latest edition of the
National Fuel Gas Code NFPA 54/ANSI
A223.1, or CAN/CGA-B149.1 and .2,
local codes or ordinances and these
instructions.
VENTING GUIDELINES - Non-Direct
Vent
1. IMPORTANT: Do not common vent
with any other appliance. Do not
install in the same chase or chim-
ney with a metal or high tempera-
ture plastic pipe from another gas or
fuel-burning appliance unless the
required minimum clearances to
combustibles are maintained
between the PVC pipe and other
pipes.
2. Use only medium or long radius
sweep elbows, such as PVC-DWV
elbows.
NOTE: For upflow and downflow
installations, extend the exhaust
pipe a minimum of 18" vertically
above the furnace cabinet before
turning the vent.
3. Vertical vent piping is preferred.
4. Install all horizontal piping as fol-
lows:
• Slope horizontal vent piping
upward a minimum of 1/4" per
foot of run so that condensate
drains toward the furnace.
• Support horizontal vent piping at
least every four feet. No sags or
dips are permitted.
5. Insulate all vent runs through
unconditioned spaces where below-
freezing temperatures are expected,
with 1" thick medium density, foil
faced fiber glass or equivalent
Rubatex/Armaflex insulation. For
horizontal runs where water may
collect and freeze, wrap the vent
pipe with self-regulating, 3 or 5 Watt
heat tape. The heat tape must be
U.L. listed and installed per the
manufacturer's instructions.
6. All piping between the furnace and
the roof penetration is 2" or 3" as
specified in Table 6. Table 6 lists the
maximum allowable exhaust vent
pipe length for the number of
elbows used, based on the furnace
size.
IMPORTANT: Use Only standard
vertical terminations when installing
the modulating furnace as a non-
direct vent appliance.
7. The minimum vent length is 5 feet.
8. All piping through the roof is 2".
When using 3" pipe, reduce to
2" within 18" of the inside of the
roof.
9. Vertical through-the-roof installa-
tions do not require any special
vent termination. Use 2" PVC
pipe extending a minimum of 12
TABLE 6
®
NON-DIRECT VENT APPLICATIONS
MAXIMUM ALLOWABLE LENGTH IN FEET OF EXHAUST PIPE
UPFLOW FURNACES RGFE
TERMINATION
FURNACE PIPE
(VERTICAL VENT
TERMINATIONS
INPUT SIZE
2" STANDARD
60,000
3" STANDARD
2" STANDARD
75,000
3" STANDARD
90,000 3" STANDARD
105,000 3" STANDARD
120,000 3" STANDARD
DOWNFLOW AND HORIZONTAL FURNACES RGGE AND RGJF
TERMINATION
FURNACE PIPE
(VERTICAL VENT
INPUT SIZE TERMINATIONS
2" STANDARD
60,000
3" STANDARD
2" STANDARD
75,000
3" STANDARD
90,000 3" STANDARD
105,000 3" STANDARD
120,000 3" STANDARD
NOTES:
1. N.R. - NOT RECOMMENDED.
2. MAXIMUM OF 6 ELBOWS MAY BE USED. DO NOT COUNT ELBOWS IN ALTERNATE TERMINATION KIT.
MEDIUM OR LONG SWEEP ELBOWS MAY BE USED.
3. A 45 OR 22.5 DEGREE ELBOW IS CONSIDERED ONE ELBOW.
4. CONCENTRIC TERMINATION NO. RXGY-E03A IS FOR THRU-THE-ROOF OR THRU-THE-WALL VENTING.
5. USE KITS RXGY-D02 OR D02A (2") OR RXGY-D03 OR D03A (3") FOR STANDARD OR ALTERNATE
THRU-THE-WALL VENTING.
6. USE KITS RXGY-D04 OR D04A FOR ALTERNATE VENTING OF 120,000 BTUH UNITS WITH LONG RUNS.
7. NO SCREENS MAY BE USED TO COVER COMBUSTION AIR AND EXHAUST.
* A = 17 1 ⁄ " CABINET WIDTH
2
B = 21" CABINET WIDTH
inches above the anticipated
level of snow accumulation.
10. Elbows must be a minimum of
15" apart.
11. No screens may be used to
cover combustion air or
exhaust.
NUMBER OF ELBOWS
22°, 45° OR 90°
MEDIUM / LONG RADIUS ONLY
ONLY)
1 - 2
40'
120'
20'
120'
110'
110'
45'
NUMBER OF ELBOWS
22°, 45° OR 90°
MEDIUM / LONG RADIUS ONLY
ONLY)
1 - 2
30'
120'
20'
120'
90'
45'
40'
3 - 4 5 - 6
35' 30'
120' 120'
15' 10'
120' 120'
105'
95'
105' 95'
35' 30'
3 - 4 5 - 6
25' 20'
120' 120'
15' 10'
120' 120'
80' 75'
40' 35'
35' 30'
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