Rheem GHE80SS Use & Care Manual page 25

STEP 3:
Secure the combustion air-inlet pipe using a field
supplied perforated strap or a suitable type material.
(see Figure 18).
STEP 4:
Assemble the vent pipe assembly by cleaning and
cementing the rain cap to the smaller diameter
exhaust pipe. Assemble the 90° elbow by cleaning
and cementing it to the rain cap. Assemble the field
supplied PVC connector and 90° elbow by cleaning
and cementing them together as shown in Figure 18.
The alternate screw method is not necessary for the
field supplied PVC parts.
Note: If field disassembly is desired for cleaning, a
stainless steel screw may be used to secure the
rain cap to the smaller diameter exhaust pipe.
WARNING
!
When using the alternate screw method, pre-drill a
clearance hole in the rain cap slightly larger than
the screw and a pilot hole in the vent pipe to
prevent cracking of the PVC pipe. In a separate
location, pre-drill a slightly larger clearance hole
in the 90° elbow and a pilot hole in the rain cap for
the screw being used at that site. Cracking of the
PVC components will cause a failure of the system,
allowing combustion products to be recirculated.
Failure to follow this warning could result in
personal injury of death.
WARNING
!
DO NOT operate the water heater with the rain cap
removed or recirculation of combustion products
may occur. The vent air pipes may also take in
water, causing damage to the water heater. Failure
to follow this warning could result in damage to the
unit, improper operation, personal injury, or death.
STEP 5:
From the roof top, slide the vent pipe assembly down
through the intake pipe and cement the rain cap to
the intake pipe. From the inside, cement the "y" fit-
ting to the intake pipe (See Figure 18).
Field Supplied
90° Elbow
Min. 12"
(30.5 cm) Exhaust
Min. 18" (46 cm)
above roof or
anticipated snow level.
Combustion Air- to
Water Heater
Figure 18
Installation
Field Supplied
PVC Connector
Field Supplied
Strap
Exhaust Vent From
Water Heater
25
Figure 19 Multiple Sidewall or Vertical
Concentric Vents
36" (91 cm) Min.
Figure 19A Multiple Sidewall Concentric Vents
36" (91 cm) Min.
16" (40 cm)
Min.
36" (91 cm) Min.
STEP 6:
Complete the installation of the remainder of the
vent and air intake systems as required in this
manual.
36" (91 cm) Min.
36" (91 cm) Min.
36" (91 cm) Min.