GSW SUPERFLUE POWER VENTED GAS FIRED WATER HEATER - Manual (Page 7)

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III)
EXHAUST VENTING
IMPORTANT: READ THIS SECTION BEFORE
PROCEEDING.
The Superflue
 series is designed to exhaust the products of
combustion to the outdoors using a sealed vent pipe system.
Required materials and vent sizing are described in Table 2.
Refer to figure 6 to determine the exhaust vent termination
position.
Plan the layout from the vent terminal back to the water heater.
Take into consideration piping position, elbows and support.
Venting Instructions
1. Refer to Figure 5 and Table 2 for vent pipe materials and
sizing.
Ø Use 45 ° elbows wherever possible.
Ø Do not use 90 ° “back to back” elbows and do not use
street elbows. Maintain 6" (150 mm) of straight section
between elbows.
Ø Calculate “Equivalent Vent Length” before starting. Do
not exceed the values shown in Table 2. Example: The
water heater is located 12 feet (4 meters ) from the
desired termination point. To reach this, you determine
that you need (3) 90
° elbows plus about 15 feet (5
meters) of 2" (50 mm) straight section. From Table 2, it
is seen that each 2" elbow = 5 equivalent feet (1.5
meters) Therefore this example uses 30 equivalent feet.
Ø Important: When using long runs of vent or when passing
through cold or unheated areas condensation of the
gases can develop. Provision must be made for a
condensate trap or drainage.
2. Measure vent piping and cut to required lengths, Pipes shall
be cut at right angles and deburred to ensure a good fit.
3. Dry fit all vent pipes, elbows and fittings before joining any
parts with solvent cement. Use only the recommended
adhesive for ABS, PVC or CPVC, depending on your
installation.
PARTS MUST FIT WITHOUT STRESS
OR BENDING OF ANY SECTION, and each
connection must overlap a minimum of ½” (15 mm). Caution:
solvent cements for plastic piping are flammable. Use only in
well ventilated areas and keep away from all sources of
ignition.
4. Support the vent piping every 4 feet (1.2 meters) to prevent
stress or sagging.
DO NOT USE AN ELBOW AS A
SUPPORT POINT. Elbows are not designed to carry the
weight of the venting system. Use appropriate support straps and
vibration isolators on a straight section.
IMPROPERLY
SUPPORTED VENTING CAN POSE A SAFETY
HAZARD.
5. For long runs of venting, or when passing through cold or
unheated areas, condensation can develop. Slope vent pipe to
drain through termination outlet. If vertical runs are used, a
condensate drain should be provided.
6. At the point where the vent pipe exits the building, drill a 2½”
(65 mm) hole for 2" (50 mm) venting or a 3¾” (95 mm) hole
for 3" (75 mm) venting). See Figure 5.
CAUTION: BEWARE OF ANY CONCEALED
WIRING OR PIPING INSIDE THE WALL.
7. Insert the vent pipe through this hole and secure into
position. Connect the vent pipe terminal elbow as shown in
Figure 5. Seal around the vent pipe with caulking or silicone
once the position is finalized. Ensure that the Debris/Rodent
Screen is properly installed.
Power Vent Connection
1. The plastic vent piping connects into the rubber coupling on
the blower assembly. See Figure 7. Lightly sand the end of
the vent pipe to roughen the outside surface to provide a
good mechanical connection with the rubber coupling.
2. Loosen the top clamp on the coupling and insert the end of
the vent pipe a full 1¼ “ (35 mm). Check that there is no
stress in the vent pipe system caused by twisting or bending.
Do not use glue or sealant at this connection.
3. Tighten top clamp so that the vent pipe is firmly secured in
the coupling and is gas tight. Do not over-tighten or cause
distortion of the parts.
4. Check that the bottom of the coupling is firmly seated on the
blower outlet and that the bottom clamp is also secure.