Instructions / Assembly

30
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STEP 6:
Complete the installation of the remainder of the vent and
combustion air-inlet systems as required in this manual.
VERTICAL
INSTALLATION
STEP 1:
Cut a proper size opening (see "D" in chart) in the roof,
and install field-supplied weather-seal boot/flashing for
the larger PVC pipe.
STEP 2:
From inside, insert the larger diameter combustion
air-inlet pipe up through the seal boot, ensuring that
no insulation or debris accumulate in the pipe. Ensure
termination height is above the 12” minimum
clearance to combustion air inlet.
STEP 3:
Secure the combustion air-inlet pipe using a field supplied
perforated strap or a suitable type material. (see the
Vertical Air Inlet Pipe Installation Figure in this page).
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 Vertical Air Inlet Pipe Installation
Figure on this page. 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" fitting to the
intake pipe (See Figure below).
Exhaust
Field Supplied
Strap
Combustion Air- to
Water Heater
Exhaust Vent From
Water Heater
(See next page for more details)
Field Supplied
PVC Connector
Field Supplied
90° Elbow
Min. 18" (46 cm)
above roof or
anticipated snow
level.
Min. 12"
(30.5 cm)
VERTICAL AIR INLET PIPE INSTALLATION
INSTALLATION