Installing the New Water Heater (cont’d)
The combustion and ventilation air flow must not be obstructed.
All vent gases must be completely vented to the outdoors of
the structure (dwelling). Install only the draft hood provided
with the new water heater and no other draft hood.
The water heater must be connected to a roof jack: The vent
pipe from the water heater to the roof jack must be no less
than the diameter of the draft hood outlet (min. 3 inches) on
the water heater.
This water heater may be installed with single wall or Type B
vent pipe connection to the draft hood and the following
U.L. listed roof jacks not furnished.
Van Dyke Ind. No. 987
Vent Line No. 2073
White Metal Products 3RJ
There must be a minimum clearance of 12 inches between
the top of the draft hood and the top of the enclosure.
The draft hood and combustion air inlet to the water heater
must be in the same atmospheric pressure zone. Do not sep-
arate by a wall, shelf, ceiling, partition, or any other means.
There must be a minimum of 6 inch clearance between sin-
gle wall vent pipe and any combustible material. Fill and
seal any clearance between single wall vent pipe and com-
bustible material with mortar mix, cement, or other noncom-
bustible substance. For other than single wall, follow vent
pipe manufacturer’s clearance specifications.
11
Filling the Water Heater
To fill the water heater with water:
1. Close the water heater drain valve by turning the han-
dle to the right (clockwise). The drain valve is on the
lower front of the water heater.
2. Open the cold water supply valve to the water heater.
NOTE: The cold water supply valve must be left open
when the water heater is in use.
3. To insure complete filling of the tank, allow air to exit
by opening the nearest hot water faucet. Allow water
to run until a constant flow is obtained. This will let air
out of the water heater and the piping.
4. Check all new water piping for leaks. Repair as needed.
DRAFT
HOOD
DRAFT HOOD
VENT
VENT CAP
VENT TO
OUTDOORS
DRAFT
HOOD
SCREW
DRAFT HOOD INSTALLATION
ROOF JACK
Venting
1. Place the draft hood legs in the receiving holes on the
top of the water heater. The legs will snap in the holes
to give a tight fit.
2. Place the vent pipe over the draft hood. With the vent
pipe in position, drill a small hole through both the
vent pipe and draft hood. Secure them together with a
sheet metal screw.
CAUTION
Never use this water heater unless it is completely filled
with water. To prevent damage to the tank, the tank must
be filled with water. Water must flow from the hot water
faucet before turning “ON” gas to the water heater.
WARNING
To insure proper venting of this gas-fired water heater, the cor-
rect vent pipe diameter must be utilized. Any additions or dele-
tions of other gas appliances on a common vent with this water
heater may adversely affect the operation of the water heater.
Consult the local gas utility if any such changes are planned.
WARNING
The water heater with draft hood installed must be connected
to a roof jack which terminates to the outdoors. Never operate
the water heater unless it is vented to the outdoors and has
adequate air supply to avoid risks of improper operation,
explosion or asphyxiation.
WARNING
Obstructed or deteriorated vent systems may present serious
health risk or asphyxiation.
WARNING
The vent pipe from the water heater must be no less than
the diameter of the draft hood outlet on the water heater.
WARNING
Failure to have required clearances between vent piping
and combustible material will result in a fire hazard.
WARNING
VENT DAMPERS - Any vent damper, whether it is operated ther-
mally or otherwise must be removed if its use inhibits proper
drafting of the water heater.
Thermally Operated Vent Dampers: Gas-fired water heaters hav-
ing thermal efficiency in excess of 80% may produce a relatively
low flue gas temperature. Such temperatures may not be high
enough to properly open thermally operated vent dampers. This
would cause spillage of flue gases and may cause carbon monox-
ide poisoning.
Vent dampers must bear evidence of certification as complying
with the current edition of the American National Standard ANSI
Z21.68 (ANSI Z21.66 & 67, respectively, cover electrically and
mechanically actuated vent dampers).
Before installation of any vent damper, consult the local gas util-
ity for further information.
