Install Instructions

12
There is a risk in using fuel burning appliances such as gas
water heaters in rooms, garages or other areas where gasoline,
other ammable liquids or engine driven equipment or vehicles
are stored, operated or repaired. Flammable vapors are heavy
and travel along the oor and may be ignited by the water
heater’s igniter or Main Burner ames causing re or explosion.
Flammable items, pressurized containers or any other potential
re hazardous articles must never be placed on or adjacent to
the water heater.
CLEARANCE TO COMBUSTIBLE MATERIALS
The water heaters covered in this manual are approved for
installation on combustible ooring. The clearance to combustible
and non combustible construction materials is 0 inches on the
back and sides of the water heater. These water heaters are also
approved for installation in an alcove.
When the water heater is installed directly on carpeting, the water
heater shall be installed on a metal or wood panel extending
beyond the full width and depth of the water heater by at least
3 in (76.2 mm) in any direction or, if the water heater is installed
in an alcove or closet, the entire oor shall be covered by the
panel. The panel must be strong enough to carry the weight of
the heater when full of water.
NOTE: Adequate clearance for servicing should be maintained
on all installations. See Service Clearance below.
TOP VIEW
0
0
0
ALCOVE
FRONT VIEW
CLEARANCES TO COMBUSTIBLE
AND NON COMBUSTIBLE
CONSTRUCTION MATERIALS
WATER
HEATER
FRONT
TOP COVER
FRONT
Figure 6
SERVICE CLEARANCE
A service clearance of 24 inches (61 cm) should be maintained
from serviceable parts such as the T&P valve, control system
components, gas valve, clean out opening, drain valve, the vent
connection (exhaust/condensate elbow). Leave as much room as
possible above the water heater and near the exhaust elbow for
this reason. See Figure 8 on page 16.
INTAKE AIR AND VENT PIPE CLEARANCES
The minimum clearance from combustible materials for the vent
(exhaust) and intake air piping shall be 0 inches. Vent or intake
air piping passing through a combustible wall or ceiling must be
a continuous run (no joints).
EXTENDED VENT TERMINATIONS
The water heaters covered by this manual can be installed using
3 inch pipe for the intake air and/or vent piping up to a maximum
of 50 equivalent feet (15.2 m). The intake air and/or vent piping
can be extended up to 120 equivalent feet (36.5 m) by installing
4 inch pipe. See the Venting Requirements on page 22.
The water heater ships from the factory with two (2) 3 inch
terminations that are 45° PVC elbows with a debris screen
installed. When 4 inch intake air or vent pipe is installed, factory
supplied 4 inch terminations must be used.
Contact your local distributor or call the parts department phone
number listed on the back cover of this manual to order 4 inch
termination(s).
OPTIONAL CONCENTRIC & LOW PROFILE TERMINATIONS
The water heaters covered in this manual can be installed in
a Direct Vent conguration using optional concentric or Low
Prole terminations. See Concentric Termination Installation
on page 30 and Low Prole Vent Termination Installation on
page 34.
HARD WATER
Where hard water conditions exist, water softening or the
threshold type of water treatment is recommended. This will
protect the dishwashers, coffee urns, water heaters, water
piping and other equipment. See Maintenance on page 63 for
sediment and lime scale removal procedures.
CIRCULATION PUMPS
A circulating pump is used when a system requires a circulating
loop or there is a storage tank used in conjunction with the water
heater. The tank is provided with a 3/4" NPT recirculation loop
return connection. See the Water Piping Diagrams beginning on
page 69 for installation location of circulating pumps.
See Circulation Pump Wiring Diagrams on page 68 for
electrical hookup information. Install in accordance with the
current edition of the National Electrical Code, NFPA 70 or the
Canadian Electrical Code, CSA C22.1.
Stainless steel circulating pumps are recommended for use with
commercial water heaters.
Some circulating pumps are manufactured with sealed bearings
and do not require further lubrication. Some circulating pumps
must be periodically oiled. Refer to the pump manufacturer’s
instructions for lubrication requirements.
INSULATION BLANKETS
Do not obstruct water heater air intake
with insulating blanket.
Gas and carbon monoxide detectors
are available.
Install water heater in accordance with
the instruction manual.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Breathing Hazard - Carbon Monoxide Gas
Insulation blankets are available to the general public for
external use on gas water heaters but are not necessary
with these products. The purpose of an insulation blanket is
to reduce the standby heat loss encountered with storage
tank heaters. The water heaters covered by this manual meet
or exceed the Energy Policy Act standards with respect to
insulation and standby heat loss requirements, making an
insulation blanket unnecessary.
Should you choose to apply an insulation blanket to this
heater, you should follow these instructions. See the Features
and Components section of this manual for identication
of components mentioned below. Failure to follow these
instructions can restrict the air ow required for proper