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Installation Instructions (cont'd)
Venting (cont'd)
VENTING THROUGH A ROOF
ALL MODELS
3"°PVC, ABS or CPVC Schedule 40 vent piping:
1. A Y"PVC Schedule 40-45 ° vent cap with wire screen is sup-
plied with the water heater.
2. 3 PVC, ABS, or CI VC Schedule 40 piping and fittings are
acceptable materials for the vent system on all models and
must be supplied locally.
• The water heater requires its own (separate) venting system.
• lr cannot be connected to existing vent piping or chimney.
• lr must terminate vertically to the outdoors
• "I}pical installation(s) shown below.
• Refer to Cementing I VC, ABS or CI VC Pipe and Fittings
on pages 20-21 and "Connecting Vent to Blower" on page
21.
ALL MODELS _ OPTIONAL 2" VENT PIPING
2°, PVC, ABS or CPVC Schedule 40 vent piping:
1. A wire screen to fit a 7" PVC, ABS or CPVC Schedule 40-
45° vent cap is supplied with the water heater.
2. A 3" PVC, ABS or CPVC Schedule 40 pipe, minimum
length of Y" (must be supplied locally), to make vent connec-
tion at the blower outlet.
3. A 3" to 2" PVC, ABS or CPVC Schedule 40 reducer (must
be supplied locally).
4. 2" and Y" PVC, ABS, or CPVC Schedule 40 piping and fit-
tings are acceptable materials for the vent system on all mod-
els and must be supplied locally.
2" PVC, ABS OR CPVC
SCHEDULE 40 PiPE
3" TO 2" PVC,ABS OR CPVC
REDUCER
3" PVC, ABS OR CPVCSCHEDULE 40 PIPE(MINIMUM
LENGTH 3")
90_STREET ELL
45 _VENT CAP _ SEAL AROUND
SCREEN_ FLASHING
VENT CAP MUST
BE POSITIONED
DOWNWARD
MAINTAIN LISTED _ _ _
CLEARANCE
CERTIFIED
WATER HEATER _
)
MAINTAIN
11 USTED
CLEARANCE
SUPPORT LATERALS
MIN, EVERY 3'K
f POSITION FIRESTOP
H
_ _ EXHAUST VERTICAL
I VENT
TOTAL VERTICAL
AND HORIZONTAL
RUNS . SEE ITEM
BELOW.
\
45° ELBOW
6. The total vertical and horizontal vent runs cannot exceed the
maximum length with the number of 90° elbows as specified
in the following tables. Ifmore elbows are required, the vent-
ing distance must be reduced 5 feet for every 90°elbow."
22