Rheem GHE100-130 Use & Care Manual page 10

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.
FOR PROPER iNSTAllATiON:
CAUTION
!
•
DO NOT use solvent cement that has become
curdled, lumpy or thickened.
•
DO NOT thin solvent cement. Observe shelf
precautions printed on the containers.
•
For applications below 32°F use only low
temperature type solvent cement.
•
Appropriate solvent and cleaner must be used for
the type of vent pipe used (PVC, CPVC or ABS).
WARNING
!
DANgER OF FiRE OR BODilY iNJURY – Solvent
cements and primers are highly flammable. Pro-
vide adequate ventilation and do not assemble
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 terminal when using direct venting.
If the water heater 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, prox-
imity to corners, weather conditions, wind patterns, and snow depth.
Periodically check to make sure that flue recirculation is not occurring.
Signs of flue gas recirculation include frosted or frozen intake termi-
nals, condensate in the intake terminal and venting system, oxidation
or white chalk material on the flame sensor or igniter shield. Correction
to flue recirculation may involve angling the intake away from the ex-
haust terminal, increasing the distance between them, or using inside
installation
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 diam-
eter size. Do not use a different size on the intake and exhaust 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 Instructions Manual for complete instructions
on venting and condensate drainage.
Stress levels in the pipe and fittings can be significantly 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 procedure to vent through the wall:
1. Cut two 2 1/2" (6.4 cm) diameter holes (for a 2" (5.1 cm) diameter
pipe), 3 1/2 in. (8.9 cm) diameter holes (for 3" (7.6 cm) diameter
pipe) or 4 ½" (11.4 cm) diameter holes (for 4" (10.2 cm) diameter
pipe) in the wall. Vent terminals must be a minimum of 24 inches
(61 cm) and a maximum of 36 inches ( cm) horizontally apart (See
Figure 4).
2. Use the proper PVC cement to secure the exhaust 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 7) must be 6 inches (12.7 cm) more
for the exhaust 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 7.
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