Vent Pipe Connection to Blower
CAUTION:
• Do Not Overtighten The Top And Bottom
Gear Clamps Of The Rubber Coupling.
• Do Not Apply Solvent Cement Or Silicone
To The Rubber Coupling Connection.
The plastic vent piping connects into the rubber coupling
located on the top of the blower assembly. This cou-
pling includes gear clamps to connect the venting to the
blower. These connections must be properly seated and
tightened to prevent the leakage of flue gases into the
area. See Figures 21-25.
The 40, 50 and 60-gallon heaters with rated inputs of
50,000 Btu/hr or less are designed and supplied with a
51mm (2 in.) rubber coupling to accept the vent pipe.
The 50 and 75-gallon models with rated inputs of 60,000
Btu/hr or more are supplied with a 76mm (3 in.) rubber
coupling to accept the vent pipe.
Before installing clean and lightly sand the end of the
plastic vent piping that will connect into the rubber cou-
pling.
Loosen the upper clamp on the rubber coupling and
insert the sanded end of the vent piping a full 32mm (1-
1/4 in.). Do not use glue or sealant in the rubber coupling.
Check that there is no stress on the connection or the
vent piping that may be caused by twisting or bending.
Tighten the upper clamp so that the vent piping is firmly
secured in the coupling and is gas tight. Do not over
tighten or cause distortion of any of the parts. Ensure
the bottom of the rubber coupling is firmly seated on
the blower outlet and that the lower gear clamp is also
secure. Check to ensure there is no distortion or move-
ment of the clamped assembly once it is completed.
BLOWER
2” VENT
PIPE
2” RUBBER
COUPLING
(SUPPLIED)
CONFIGURATION
FOR 40, 50 AND
60-GALLON (LO-
INPUT) HEATERS
CONNECTED TO
2" VENTING.
Figure 21
1.
2.
3.
4.
5.
6.
2” RUBBER
COUPLING
(SUPPLIED)
BLOWER
3” VENT
PIPE
2”-3”
ADAPTER*
(FIELD
SUPPLIED)
2” VENT PIPE,
75mm (3 in.)
MAX LENGTH
CONFIGURATION
FOR 40, 50 AND
60-GALLON (LO-
INPUT) HEATERS
CONNECTED TO
3” VENTING.
* FOR 3” DIRECT
CONNECTION TO
THE BLOWER,
ORDER
COUPLING Kit #
9008311005
(SEE ALSO
FIGURE 24).
Figure 22
4” VENT
PIPE
3” RUBBER
COUPLING
(ORDER COUPLING
Kit # 9008311005
TO REPLACE 2”
RUBBER COUPLING
SUPPLIED.)
3” VENT PIPE,
75mm (3 in.)
MAX LENGTH
3”-4”
ADAPTER
(FIELD
SUPPLIED)
BLOWER
CONFIGURATION
FOR LO-INPUT
HEATERS
CONNECTED TO
4” VENTING.
LOW-INPUT
HEATERS ARE
SUPPLIED WITH
A 2” RUBBER
COUPLING.
Figure 23
3” VENT
PIPE
3” RUBBER
COUPLING
(SUPPLIED)
BLOWER
CONFIGURATION
FOR HI-INPUT
HEATERS
CONNECTED TO
TO 3” VENTING.
(OPTIONAL
CONFIGURATION
FOR LO-INPUT
HEATERS
CONNECTED TO
TO 3” VENTING.)
Figure 24
4” VENT
PIPE
3” RUBBER
COUPLING
(SUPPLIED)
3” VENT PIPE,
75mm (3 in.)
MAX LENGTH
3”-4”
ADAPTER
(FIELD
SUPPLIED)
BLOWER
CONFIGURATION
FOR HI-INPUT
HEATER
CONNECTED TO
4” VENTING.
Figure 25
– 16 –
