American Standard Standard Residential, Руководство по эксплуатации, установке и обслуживанию

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17
Fig. 18
A VENT USED IN A
SPECIAL VENTING
SYSTEM WITH POSITIVE
VENT PRESSURE AND
PASSING THROUGH A
ROOF SHALL EXTEND AT
LEAST 18 in. ABOVE THE
HIGHEST POINT WHERE
IT PASSES THROUGH THE
ROOF SURFACE AND ANY
OTHER OBSTRUCTION
WITHIN A HORIZONTAL
DISTANCE OF 18 in.
A VERTICAL VENTING
SYSTEM MUST BE
SUPPORTED EVERY 5ft.
3 in. MIN.
LENGTH
TERMINATION
MAY BE 90°
ELBOW
RODENT
SCREEN
(INSTALL
INTO
ELBOW)
ROOF
LINE
18 in. OR
ABOVE
ANTICIPATED
SNOW LEVEL
Fig. 19
CONFIGURATION FOR 40 AND 50
GALLON (LO-INPUT) HEATERS
CONNECTED TO 2" VENTING.
2" VENT PIPE
2" RUBBER
COUPLING
(SUPPLIED)
BLOWER
Fig. 20
CONFIGURATION FOR 40 AND 50
AND GALLON (LO-INPUT) HEATERS
CONNECTED TO 3" VENTING.
*FOR 3" DIRECT CONNECTION TO
THE BLOWER
2" RUBBER
COUPLING
(SUPPLIED)
3" VENT PIPE
2" - 3" ADATER * (FIELD SUPPLIED)
2" VENT PIPE, 7 mm (3 in) MAX LENGTH
BLOWER
Fig. 21
2" RUBBER
COUPLING
(SUPPLIED)
BLOWER
4" VENT PIPE
2" VENT PIPE, 75 mm (3 in) MAX LENGTH
2" - 4" ADAPTER (FIELD SUPPLIED)
Fig. 22
2" VENT
PIPE*
(SUPPLIED)
2" VENT
PIPE*
(SUPPLIED)
2" ELBOW
** (FIELD SUPPLIED)
2" RUBBER
COUPLING
(SUPPLIED)
BLOWER
Vent pipe connection to blower
1. The vent piping connects into the rubber coupling
located on the top of the blower assembly. This coupling
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 Figure 19 through Figure 22.
2. The water heater is supplied with a 3” x 2” rubber
coupling to accept the vent pipe and is required in all
installations. Do not attempt to connect the vent piping
directly to the blower without using the rubber coupling.
3. Before installing clean and lightly sand the end of the
plastic vent piping that will connect into the rubber
coupling. For polypropylene vent systems follow
manufacturer’s instructions.
4. Loosen the upper clamp on the rubber coupling and
insert the sanded end of the vent piping a full 1-1/4in.
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.
5. 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 movement of the clamped assembly once it is
completed.
6. If the outlet vent pipe is to be turned horizontally
directly off the blower, a 3 in. long section vent pipe shall
be used to connect the elbow to the rubber coupling
(see Figure 22).
Note: Polypropylene vent systems require separate
adaptor.