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3) BLOWER RUBBER COUPLING
CONNECTION
(See figure 5)
1. Clean and slightly sand the end of the vent pipe
that will connect to the rubber coupling. This will
ensure a good mechanical connection between the
coupling and the pipe.
2. At the rubber coupling, loosen the top gear clamp
to allow the vent piping to be inserted fully 1–1/4”
(32mm) deep. Do not use sealant or glue.
3. Tighten the top gear clamp to ensure that the vent
pipe is firmly secured, and gas tight.
4. Check that the bottom gear clamp is firmly seated,
secured, and gas tight.
5. As a final check, the vent pipe should be gently
moved side to side and vertically. There should be
no slippage or movement of the vent pipe within the
coupling.
BLOWER ASSY WITH RUBBER COU-
PLING: FOR 2” NOMINAL PIPE
BLOWER ASSY WITH RUBBER COU-
PLING: FOR 3” NOMINAL PIPE
BLOWER ASSEMBLYWITH RUBBER
COUPLING: FOR 3” NOMINAL PIPE
MODELS DESIGNED FOR USE WITH 2” OR 3” PIPE
MODELS DESIGNED FOR USE WITH 3” PIPE ONLY
Figure 5
Figure 6
4) IF A VENT RISER IS REQUIRED
1. Fabricate the vent riser to lift the termination elbow
to the height required.
2. Fasten the assembly to the outside wall with brack-
ets. See Figure 6. Bracket is to be supplied by
installer.
3. Extend the horizontal run of pipe a convenient dis-
tance through the wall to make further work easy.
4. Connect vent riser assembly to the rest of the vent-
ing system.
BRACKET
VENT RISER
CAULK
ATTACH 90° TERMINATION
ELBOW - WITH SCREEN
AGAINST VENT PIPE
12” MIN.
CONDENSATION
TRAP & DRAIN
GROUND LEVEL OR MAXIMUM SNOW LINE
VENT PIPING MAY BE SLOPED IN ANY DIRECTION, AS LONG AS A
WATER TRAP IS NOT CREATED IN THE VENTING SYSTEM. THE
SLOPE SHOULD BE KEPT TO A MINIMUM SO AS NOTTO EXERT ANY
UNDUE STRESS ON THE PIPE.
INSTALLATION OF FABRICATED VENT RISER
III) GAS PIPING
Install the gas piping as indicated in Figure 7. Use only
new pipe and fittings, with sound, clean–cut pipe
threads. Sealing compound must conform to the applic-
able code for pipe sealing compounds for use with nat-
ural gas and propane.
A manual gas shut–off valve must be installed ahead of
a union of the ground– joint type to the gas valve. At
the gas control, a sediment trap must be installed.
The maximum inlet gas pressure must not exceed 1/2
PSIG (14” W.C.). For input adjustment, the minimum
inlet gas pressure is 1/28 PSIG (1” W.C.) above the
manifold pressure shown on the water heater rating
plate.
LEAK TESTING
The water heater and its gas line connections must be
leak tested before putting the water heater in operation.
CAUTION
• DO NOT OVERTIGHTEN THE TOP AND BOT-
TOM GEAR CLAMPS OF THE RUBBER COU-
PLING.
• DO NOT APPLY SOLVENT CEMENT OR SILI-
CONE TO THE RUBBER COUPLING CONNEC-
TION.
1 1/4”
(32mm)
1 1/4”
(32mm)
REDUCER
2” - 3”
TOP GEAR
CLAMP
RUBBER
COUPLING
BOTTOM
GEAR
CLAMP
BLOWER OUT-
LET FLANGE
BLOWER