John Wood Power Vent (Non-ENERGY STAR qualified models) - Manual (Page 5)

Relief Valve Requirements (T&P)
All water heaters must be fitted with a proper temperature
and pressure relief valve. These valves must be certified as
meeting the requirements of the "Standard For Relief
Valves For Hot Water Supply Systems, ANSI
Z21.22/CSA 4.4".
Flooding/Freezing
If this water heater has been exposed to flooding, freezing,
fire or any unusual condition, do not put it into operation until
it has been inspected and approved by a qualified service
technician. THESE CONDITIONS CAN RESULT IN
UNSEEN INTERNAL DAMAGE and are not subject to war-
ranty coverage.
III) INSTALLATION
Unpacking the Water Heater
Important: Do not remove any permanent instructions,
labels, or the data label from outside of the water heater or
on the inside of panels.
• Remove exterior packaging and place installation com-
ponents aside.
• Inspect all parts for damage prior to installation and
start-up.
• Completely read all instructions before attempting to
assemble and install this product.
If you observe damage to the water heater or any of its com-
ponents, DO NOT ASSEMBLE OR INSTALL IT OR MAKE
ANY ATTEMPT TO FIX THE DAMAGED PART(S). Contact
the place of purchase for further instructions.
• After installation, dispose of packaging material in the
proper manner.
Location Requirements
The water heater must be installed indoors in an area not
subject to freezing temperatures and in a vertical position
on a level surface. Water heaters located in unconditioned
spaces (e.g., attics, basements etc.) may require insulation
of the water piping, drain piping and venting to protect
against condensation. The power vented series of water
heaters are designed to vent the products of combustion
horizontally through the wall or vertically through the roof.
The blower expels the products of combustion by means of
plastic piping to the outdoors without the need for a con-
ventional chimney.
Select a location as centralized within the piping system as
possible. The heater should be located in an area where
leakage of the tank or connections will not result in damage
IMPORTANT:
This water heater must be installed strictly in accordance
with the instructions enclosed, and local electrical, fuel
and building codes. It is possible that plumbing connec-
tions to the water heater, or the water heater itself, may
develop leaks. IT IS THEREFORE IMPERATIVE that the
water heater be installed so that any leakage of the tank
or related water piping is directed to an adequate drain in
such a manner that it cannot damage the building, furni-
ture, floor covering, adjacent areas, lower floors of the
structure or other property subject to water damage. This
is particularly important if the water heater is installed in a
multi-story building, on finished flooring or carpeted sur-
faces. GSW WILL NOT ASSUME ANY LIABILITY for
damage caused by water leaking from the water heater,
pressure relief valve, or related fittings. Select a location
as centralized within the piping system as possible. In any
location selected, it is recommended that a suitable drain
pan be installed under the water heater. This pan must
limit the water level to a MAXIMUM depth of 45mm (1 3/4
in.) and have a diameter that is a minimum of 50mm (2 in.)
greater than the diameter of the water heater. Suitable
piping shall connect the drain pan to a properly operating
floor drain. When used with a fuel-fired heater, this drain
pan must not restrict combustion air flow.
WARNING
Excessive Weight Hazard
Use two or more people to move and install
water heater. Failure to do so can result in
back or other injury.
CAUTION
Hydrogen gas can be produced in a hot water system
served by this heater that has not been used for a long
period of time (generally two (2) weeks or more).
Hydrogen gas is extremely flammable and can ignite
when exposed to a spark or flame. To reduce the risk of
injury under these conditions, it is recommended that the
hot water faucet be opened for several minutes at the
kitchen sink before using any electrical appliance con-
nected to the hot water system. Use caution in opening
faucets. If hydrogen is present, there will probably be an
unusual sound such as air escaping through the pipe as
the water begins to flow. There should be no smoking or
open flame near the faucet at the time it is open.
45mm MAX
(1 3/4 in.)
AT LEAST 50mm (2 in.)
GREATER THAN THE DIAMETER
OF THE WATER HEATER.
PIPE TO
ADEQUATE
DRAIN Figure 1 Drain Pan Installation
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