Rheem Maximus Manual page 28

INSTALLATION
WARNING
!
These instructions are intended as an aid to qualified service
personnel for proper installation, adjustment, and operation of
this kit. Read these instructions thoroughly before attempting
installation, adjustment, or operation. Failure to follow these
instructions can result in improper installation, adjustment,
service, or maintenance possibly resulting in fire, electrical
shock, property damage, personal injury, or death.
WARNING:
!
This kit is to be used only for vent & combustion air-inlet
termination for power direct vent gas water heaters. DO NOT
use this kit to terminate any other type of appliance. Failure
to follow this warning could result in fire, personal injury, or
death.
LOCATION:
The Concentric Vent & Combustion Air-Inlet Termination Kit can
be installed in a horizontal or vertical (roof) orientation. Before
installation procedures begin, determine the best location for
the termination kit.
IMPORTANT:
When installing the kit, consider the following when choosing
a location:
• Kit is positioned where vent gases will not damage
nearby structure.
• Kit is positioned so that wind will not cause combustion
products, leaves, snow, or other debris to enter the
combustion air-inlet.
• Kit is positioned where it will not get damaged by foreign
objects.
• Kit is positioned where vent gases will not be inhaled or
cause a nuisance.
NOTE: Ensure that the heights of the vent and/or combustion
air-inlet openings are at least 12" above the anticipated snow
level.
HORIZONTAL
INSTALLATION
STEP 1:
Cut the proper size opening (see "D" in chart) in the sidewall
and install the field supplied weather-seal boot/flashing for PVC
pipe.
STEP 2:
From inside, insert the combustion air-inlet pipe through the
seal boot so that a maximum of 1" clearance occurs between
the outside wall and the rain cap fins (see the following Figure).
Ensure that no insulation or debris accumulate in the pipe.
28
HORIZONTAL AIR INLET PIPE INSTALLATION
Combustion
Field Supplied
Air-Inlet to
Strap
Water Heater
Exhaust
Vent from
Water
Heater
STEP 3:
Secure the combustion air-inlet pipe using a field supplied
perforated strap of a suitable type material (see Figure above).
STEP 4:
Assemble the vent pipe assembly by cleaning and cementing
the rain cap to the smaller diameter vent pipe.
Vent Pipe Assembly
Note: If field disassembly is desired for cleaning, a stainless
steel screw may be used to secure the rain cap to the PVC vent
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.
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 and elbow
removed or recirculation of combustion products may occur.
The vent and combustion air-inlet systems 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 outside, slide the vent pipe assembly through the
combustion air-inlet pipe and cement the rain cap to the
combustion air-inlet pipe. From the inside, cement the "Y" fitting
to the combustion air-inlet pipe (refer to Figures in this page).
1" Maximum
Min. of 12"
(30.5 cm)
above grade
or antici-
pated snow
level.