Vent Pipe Installation - Goodman GRL SERIES Installation Instructions Manual

VENT PIPE INSTALLATION

NON-DIRECT VENT
INSTALLATION
GUIDELINES
IMPORTANT: Failure to correctly
follow all venting guidelines may
result in erratic furnace operation,
freeze-up of combustion air or
exhaust air piping or sooting of the
furnace.
All exhaust piping must be installed in
compliance with Part 7, "Venting of
Equipment," of the latest edition of the
National Fuel Gas Code NPFA54/
ANSI Z223.1-, local codes or
ordinances and these instructions.
1. Vertical piping is preferred.
2. All horizontal piping must slope
upward a minimum of /
1
per foot of run so that
condensate drains toward the
furnace.
3. All horizontal runs must be
supported at least every 4 feet.
No sags or dips are permitted.
4. IMPORTANT: Do not common
vent with any other appliance. Do
not install in the same chase or
chimney with a metal or high
temperature 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.
5. All vent runs through
unconditioned spaces where
below-freezing temperatures are
expected should be insulated
with 1-in. thick, medium-density,
foil-faced fiberglass. An
equivalent "arm-a-flex" or "rub-a-
tex" insulation may also be used
as long as there is no heat tape
applied to the vent pipe. For
horizontal runs where water may
collect, 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.
FIGURE 9
TEE TERMINAL – FOR STANDARD
HORIZONTAL NON-DIRECT
INSTALLATION
VENT
12"
TABLE 1
UPFLOW UNITS
FOR NON-DIRECT VENT APPLICATIONS - AIR FOR COMBUSTION
PROVIDED FROM INDOORS
MAXIMUM ALLOWABLE LENGTH IN FEET OF EACH EXHAUST PIPE AND INTAKE PIPE
FURNACE
INPUT
45,000
60,000
90,000
NOTES:
inch
4 1. *N.R. - NOT RECOMMENDED.
2. MAXIMUM OF 6 ELBOWS MAY BE USED. DO NOT COUNT ELBOWS REQUIRED FOR
ALTERNATE TERMINATION. USE ONLY MEDIUM OR LONG SWEEP ELBOWS.
3. A 45 OR 22.5 DEGREE ELBOW IS CONSIDERED ONE ELBOW.
4. NO SCREENS MAY BE USED TO COVER EXHAUST.
6. The minimum vent pipe length is
5 feet.
7. Extend the exhaust pipe a
minimum of 18" from the cabinet
before turning vent.
8. Vent cannot be ran underground.
ELEVATED SINGLE PIPE
ALTERNATE TEE
TERMINATION
See Figure 10. The tee termination
may be elevated up to 24 inches
above the wall penetration if required
for anticipated snow levels. Use 2
long-sweep, 2-in. PVC elbows and 2-
in. PVC pipe, attaching the tee so it is
12 inches from the wall.
STANDARD INSTALLATIONS
The single-pipe system requires an
exhaust pipe only. Combustion air
may be taken from the furnace
installation area or ducted to the
furnace area from the outside.
Size the exhaust pipe as specified in
Table 1. This table lists the maximum
allowable length in feet of the exhaust
pipe that may be used for all furnace
inputs as related to the number of
elbows required and the termination.
(See shaded area.)
Vertical through-the-roof installations
do not require a vent termination. Use
2-in. PVC pipe extending a minimum
of 12 inches above the anticipated
level of snow accumulation. See
12" MIN. ABOVE
GRADE OR exhaust pipe requirements, Figure 14.
SNOW LEVEL
When 3-in. vent pipe is used from
furnace to the roof, reduce it to 2
PIPE
TERMINATION
SIZE
Standard
2"
Alternate
Standard
2"
Alternate
Standard
3"
Alternate
Standard
3"
Alternate
inches before penetrating the roof. A
maximum of 18 inches of 2-in. pipe
may be used below the roof.
Maximum exposed vent length above
the roof line is 30". Total 2" vent length
is a maximum of 48".
Horizontal vent terminations require a
2-in. PVC tee positioned 12 inches
from the outside wall. See exhaust
pipe requirements, Figure 15. When
3-in. pipe is used from the furnace to
the outside wall, reduce it to 2 inches
before penetrating the wall. A
maximum of 18 inches of 2-in. pipe
may be used inside the wall.
An alternate termination may be used
as shown in Figure 10 to clear
anticipated snow levels. The tee may
be raised up to 24 inches above the
wall penetration. Use two long-sweep
radius bend, 2-in. PVC elbows and a
length of 2-in. PVC pipe so that the
elbows are on 24-in. centers.
NOTE: Extend the exhaust a
minimum of 18" from the furnace top
plate before turning vent.
NON-DIRECT VENT TERMINATION
LOCATION REQUIREMENTS
!
MOISTURE IN THE COMBUSTION
PRODUCTS CONDENSES AS IT
LEAVES THE TERMINATION. THIS
CONDENSATE CAN FREEZE ON
EXTERIOR WALLS, UNDER THE
EAVES, AND ON SURROUNDING
OBJECTS. SOME DISCOLORATION
IS TO BE EXPECTED. HOWEVER,
IMPROPER LOCATION OR
INSTALLATION CAN CAUSE
NUMBERS OF ELBOWS
45° OR 90°
Medium / Long Radius ONLY
1-2 3-4
60 55
55 50
30 25
25 20
120 120
120 120
90 85
60 50
CAUTION
5-6
50
45
20
15
115
110
75
45
15