Concentric Vent Installation - American Water Heater 300 Series Instruction Manual

CONCENTRIC VENT INSTALLATION

This water heater is certified for concentric venting with concentric
vent kit #100111100. Follow the instructions below for proper
installations.
Table 8 – KIT COMPONENTS
Field supplied pipe and fittings are required to complete the
installation.
This concentric vent termination kit may be used with 3 inch diameter
pipe systems.
SAFETY CONSIDERATIONS
Installing and servicing water heating equipment can be hazardous
due to gas and electrical components. Installation and service of
the concentric vent termination requires ability equivalent to that of
a qualified installer or qualified service technician, see Page 7. All
precautions in the literature, on tags, and labels attached to the unit
must be observed.
Follow all safety codes. Wear safety glasses and work gloves.
* Dimension 19.50 in. may also be shortened by cutting the
pipes, provided in the kit, to 12 in. minimum.
** Dimension 36.10 will change accordingly as dimension
19.50 in. is shortened.
Do not use field-supplied couplings to extend pipes. Airflow restriction
will occur and the heater pressure switch may cause intermittent
operation.
Figure 25
Figure 26
INSTALLATION VERTICAL ROOF TERMINATION
1. Determine best location for termination kit.
N O T E : R o o f t e r m i n a t i o n i s p r e f e r r e d s i n c e i t i s l e s s
susceptible to damage, has reduced chances to intake contaminants,
and less visible vent vapors.
2. Cut 1 hole (5 in. diameter)
3. Partially assemble concentric vent termination kit.
a) Cement Y concentric fitting to larger diameter kit
pipe, see Figure 25.
b) Cement rain cap to smaller diameter kit pipe, see Figure 25.
NOTE: Instead of cementing the smaller pipe to the rain cap, a
stainless steel screw may be used to secure the 2 components
together when field disassembly is desired for cleaning, see Figure
27. Locate the drill location dimple on the outside of the rain cap;
at this location, drill a 3/16" hole through the cap and the inner
pipe wall with the path of the hole perpendicular to the inner pipe
NOT the outside of the cap; insert the screw and tighten the bolt;
do not over tighten.
When using alternate screw method, failure to drill adequate holes
may cause cracking of PVC components, allowing combustion
products to be recirculated. Failure to follow this warning could
result in personal injury or death.
Do not operate the heater with rain cap removed or recirculation
of combustion products may occur. Water may also collect inside
larger combustion-air pipe and flow to the burner enclosure.
Failure to follow this warning could result in product damage or
improper operation, personal injury or death.
4. Install Y concentric fitting and pipe assembly through
structure's hole and field supplied roof boot/flashing.
33
STAINLESS STEEL
SCREW AND NUT
Figure 27
Figure 28