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Improper installation, adjustment, alteration, service or maintenance can cause serious injury or
property damage. Refer to this manual. For assistance or additional information, consult a qualified
installer or service agency.
If the information in these instructions is not followed exactly, fire or explosion may result and can
cause property damage, personal injury or death.
Do not install on combustible flooring. Minimum clearance to combustible construction is: SIDES: 6”;
BACK: 6”; FRONT: 24”. Install in accordance with all local codes. In the absence of local codes,
refer to National Fuel Gas Code and/or NFPA 31 or ANSI Z21.10.1.
Install unions and shut-off valves on both hot and cold water lines. A temperature and pressure
(T&P) relief valve has been installed at the factory. Install a discharge line from the relief valve outlet
to a suitable drain. Arrange the line without restriction to allow for complete drainage of both the
relief valve and line. Do not install a check valve in the cold water line. If backflow preventers or
pressure regulators are installed, be sure to make provision for expansion of water when heated by
installing either a thermal expansion valve or an expansion tank in the system.
All piping must comply with local codes/ordinances or National Fuel Gas Code & NFPA No. 54
Install a sediment trap or drip leg in the supply line to the burner. Install a union in the gas line adja-
cent to and upstream from the control manifold and downstream from the manual main shut-off
valve. A 1/8” NPT plugged tapping accessible for test gauge connection must be installed immedi-
ately upstream of the gas supply connection to determine the gas supply pressure to the burner.
Install a manual shut-off valve in the gas supply line external to the water heater.
The gas line should be a separate supply direct from the meter to the burner. Use new pipe that is
free of cutting burrs and well-supported. Use pipe dope (approved for all gasses) on male threads
only.
When pressure testing the gas supply piping system at less that 1/2 psig., close the manual gas
shut-off valve to the heater. If test pressures are to exceed 1/2 psig., the water heater and its manu-
al shut-off valve must be disconnected from the system. Be sure gas service and meter are ade-
quately sized.
All heaters covered by this manual are equipped with two-stage fuel pumps. They require a two pipe
system, suction and return. The fuel pumps have the bypass plug installed, which requires a two-
pipe system using 5/8” O.D. soft copper tubing.
For gravity flow system (oil supply above the burner), if a one-pipe system is used the bypass plug
should be removed. On the larger burners and all dual fuel burners, a two-pipe system is required.
For multiple heater installations, run a separate suction and return line for each heater if possible.
Where the combined lift in feet and horizontal run exceeds 100’, install a booster pump as near to
the supply tank as possible. Return lines must be the same diameter as suction lines and extend
close to the bottom of the storage tank, but stop slightly above the suction lines. Use a minimum of
fittings, making bends in tubing with as large a radius as possible. Always use flared fittings, not
compression fittings. If pipe is used instead of tubing, do not connect the burner to the pipe – use
copper tubing and form a coil before attaching to the burner.
The burner is shipped separately. Unpack and examine to be sure the unit is in good condition.
Install on the water heater using the mounting bolts provided. On larger burners, an additional
pedestal is supplied to support the burner. Make sure there are no obstructions in front of the burner
and that the burner is not protruding into the combustion area.
Using “L” or “A” type venting, connect the heater to the chimney. Do not reduce the smoke pipe
diameter; use the same size smoke pipe as the heater flue pipe. Run a separate connector from the
heater to the chimney where possible. If the heater must be joined to another oil appliance breach-
ing before going into the chimney, enlarge the existing breaching to accommodate the extra volume
of gases from the heater. The entrance into the breaching should be at a 45° angle.
WARNING
WARNING
CAUTION
WATER PIPING
GAS PIPING
OIL PIPING
MOUNTING THE
BURNER
CONNECT TO THE
CHIMNEY