Tightening Water Heater Collar To Exhaust Vent And Intake Pipe - Westinghouse WGRT 150 Series Installation Start-Up Maintenance Parts

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2.5 feet (.75M) for each additional 3" 45
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8 feet (2.4M) for each additional 2" 90
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4 feet (1.2M) for each additional 2" 45
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Some terminations are considered elbows, and deduction should be applied. For example, a turndown 90
open T termination should be considered a 90
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For 2" diameter installations, install a reducing coupling in a vertical section of pipe ABOVE the pipe clamp installed
on the water heater. See Figure 9.
b. For example: If the 2" exhaust vent has two 90
Length = (2x8) + 10 = 26 feet.
Further, if the 2" intake pipe has one 90
Intake Pipe Equivalent Length = 8 + 4 + 10 = 22 feet.
The Exhaust Vent Equivalent Length + the Intake Pipe Equivalent Length equal the Total Equivalent Length. In this example,
the Total Equivalent Length is 48 feet.
c. The minimum Total Equivalent Length is seven (7) feet (2.1M).
NOTE: The intake pipe and exhaust vent lengths do not have to be of equal length. There is no balancing requirement between intake
and exhaust.
Vent adaptors are not designed as load-bearing devices, and must not be used to support exhaust vent piping. All vent pipes must be
properly connected, supported, and the exhaust must be pitched a minimum of ¼" per foot back to the boiler to allow drainage of
condensate. Failure to properly support vent piping and follow the information in this statement could result in product damage, severe
personal injury, or death.
Failure to provide a minimum total vent length of 7 equivalent feet could result in property damage and improper appliance operation.
D. TIGHTENING WATER HEATER COLLAR TO EXHAUST VENT AND INTAKE PIPE
This appliance uses 2" or 3" diameter pipe for exhaust vent and intake pipe. In order to use 2" pipe, it is required to reduce pipe size in
a vertical length of pipe with a 3" x 2" reducing coupling (not included). Follow the steps below to install 3" pipe into the appliance
collar. See Figure 8 for additional details.
1. Clean and dry the appliance connection. DO NOT use primer or cement on the appliance connection.
2. Push the length of pipe into the connection until it touches the bottom of the fitting.
3. Tighten the clamps using a screwdriver.
4. Ensure the pipe is secure before continuing installation.
For 2" installations, install the reducing coupling in a vertical section of pipe. At least a 6" length of 3" pipe MUST BE
5.
INSTALLED before reducing to 2". See Figure 9.
Figure 8 – Correct Installation into the Water Heater Collar
o
elbow
o
elbow
o
elbow
o
elbow.
o
elbows and 10 feet of PVC pipe we will calculate: Exhaust Vent Equivalent
o o
elbow, one 45 elbow, and 10 feet of PVC pipe, the following calculation applies:
Figure 9 – Transitioning from 3" to 2" Vent Pipe
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o
or an
WHL-004 REV. 5.26.17