12
NOTICE: Stir the solvent cement frequently while
using. Use a natural bristle brush or the dauber
supplied with the can. The proper brush size is
one inch and pipe with cleaner-primer. Apply a
liberal coat of
FOR PROPER INSTALLATION:
• DO NOT use solvent cement that has become
curdled, lumpy or thickened.
• DO NOT thin solvent cement. Observe shelf
recautions printed on the containers.
• For applications below 32°F use only low tem-
perature type solvent cement.
• Appropriate solvent and cleaner must be used
for the type of vent pipe used (PVC, CPVC or
ABS).
DANGER OF FIRE OR BODILY INJURY – Solvent
cements and primers are highly flammable.
Provide adequate ventilation and do not assem-
ble near heat source or open flame. DO NOT
smoke. Avoid skin or eye contact. Observe all
cautions and warnings on material containers.
DIRECT VENT INSTALLATION - Check to make sure
flue gases do not recirculate into the air intake ter-
minal when using direct venting. If the water heat-
er is having service issues, flue recirculation may
be a contributing factor. Even when the minimum
vent terminal separation distances are followed,
recirculation may still occur depending upon the
location outside the building, the distance from
other buildings, proximity to corners, weather
conditions, wind patterns, and snow depth. Peri-
odically check to make sure that flue recirculation
is not occurring. Signs of flue gas recirculation
include frosted or frozen intake terminals, con-
densate in the intake terminal and venting system,
oxidation or white chalk material on the flame sen-
sor or igniter shield. Correction to flue recircula-
tion may involve angling the intake away from the
exhaust terminal, increasing the distance between
them, or using inside air for combustion. Check to
be sure the intake and exhaust terminals are not
obstructed, especially during periods of below
freezing weather. All intake and exhaust venting
components must have the same diameter size.
DO NOT use a different size on the intake and ex-
haust venting.
Be sure the condensate runs freely to a drain and
does not accumulate inside the water heater. In
cold climates, precautions may need to be taken
to insure that the condensate drain does not
freeze. Make sure the condensate trap or drain
loop is installed to prevent flue gases from being
discharged into the room. Refer to the Venting
section of the Installation and Operating Instruc-
tions Manual for complete instructions on venting
and condensate drainage.
Stress levels in the pipe and fittings can be signifi-
cantly increased by improper installation. If rigid
pipe clamps are used to hold the pipe in place,
or if the pipe cannot move freely through a wall
penetration, the pipe may be directly stressed, or
high thermal stresses may be formed when the
pipe heats up and expands. Install accordingly to
minimize such stresses. Follow the following pro-
cedure to vent through the wall:
1. Cut two 4 1/2" (11.4 cm) diameter holes (for a 4"
(10.2 cm) diameter pipe), 6 ½” (16.5 cm) diam-
eter holes (for 6” (15.2 cm) diameter pipe) in the
wall. Vent terminals must be a minimum of 24
inches (61 cm) and a maximum of 36 inches
(91.4cm) horizontally apart (See Figure 9).
2. Use the proper PVC cement to secure the ex-
haust vent and air intake terminals provided
with the water heater to the plastic pipes. The
distance between the back edge of the exhaust
vent terminal and the exterior wall (see Figure
10) must be 6 inches (12.7 cm) more for the ex-
haust vent terminal than the air intake terminal.
Use the proper cement or sealant and assembly
procedures to secure the vent connector joints
between the terminal and the blower outlet.
Provide support brackets for every 3 feet (.91 m)
of horizontal vent beyond the intake terminal as
seen in Figure 12.
NOTICE: Installations in Canada must conform
to the requirements of CSA B149 code. Plastic
vent systems must be assembled with pipe,
fittings, cements, and primers listed to ULC
S636. Components of this listed system shall
not be interchanged with other vent systems
or unlisted pipe/fittings. In Canada, the primer
and cement must be of the same manufacture
as the vent system; DO NOT mix primers and
cements from one manufacture with a vent
system from a different manufacturer. The sup-
plied plastic pipe/fittings are certified as part
of the water
Minimum and Maximum System Lengths
The water heater should be located such that
plastic vent pipe lengths and the number of
connection fittings are minimized. Minimum and
maximum equivalent pipe lengths for the vent
and combustion air intake systems are given in
Tables 4 and 5. Either 4 in. or 6 in. plastic piping
may be used. The water heater is provided with
fittings that readily adapt to 4 in. plastic pipe.
DO NOT use less than 4 in. diameter plastic
pipe and DO NOT use unequal sizes except as
shown to increase from 4 in. to 6 in. diameter at
the point of connection to the water heater. Fig-
ure 8 shows the proper connections to increase
from 4” to 6” plastic pipe.
Installation
CAUTION
WA RNING
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