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These heaters are specially designed for use on self generating
systems. They should never be used on line or low voltage A.C.
circuits.
Installing the ON/OFF Device
To install an ON/OFF device (such as a wall switch, remote, toggle
switch,or thermostat), remove the wire nut from the two wires from
the valve. Run additional wire from the valve wires to the ON/OFF
device. Install the ON/OFF device in the same room as the furnace
following the installation instructions supplied with it. In the absence
of instructions, install the ON/OFF device 4 to 5 feet above the floor
on an interior wall not affected by another heating source (i.e. stove
or water heater) or the temperature of an adjoining room..
System Check
A millivolt meter is required to check the system. The millivolt
readings should be:
• Across the thermopile terminals, 400-450 millivolts with the
heater OFF.
• Across the thermopile terminals, 150-250 millivolts with the
heater ON.
• Across the wires at the valve, less than 30 millivolts with the
heater ON.
Steps in Removing Main Burner, Orifice and Valve
1. Disconnect the thermopile and pilot supply line at the pilot burner.
2. Remove the burner compartment cover 5/16" (8mm) socket
suggested.
3. Remove screw holding left side of burner and lift out.
4. Main burner orifice is now accessible. Use 1/2" (13mm) box end
wrench to remove and apply non-hardening pipe dope sparingly
to orifice threads when replaced.
5. To remove the entire gas valve the nut holding the orifice fitting
to the chamber must be removed and the gas supply to the
valve disconnected. After this, the valve and orifice elbow can
be removed as a unit.
Cleaning The Pilot Burner
Proper operation depends on a good pilot flame. The flame must
cover the top of the thermopile. Cleaning of the pilot may be an
annual necessity due to spiders. After removing the supply tubing
and orifice, use a pipe cleaner or wire to clean the entire internal
part of the pilot.
Cleaning the Combustion Chamber and Main Burner
When the main burner and vent cap are removed, all internal areas of
the combustion chamber are accessible for cleaning with a vacuum
hose. The main burner may be cleaned by forcing water into the
ports and the throat of the burner. The burner should be blown dry
or heated to dry all water out before reinstalling.
MAINTENANCE
Piezo Pilot Ignitor Instructions
Depressing the piezo ignitor button completely causes a spark to
occur at the pilot. This is a substitute for a match which requires
opening the pilot hole cover.
To light the pilot, it is important that the electrode be 1/8" (3 mm)
from the thermopile. The spark must occur at the point the burner
flame hits the thermopile. The end of the electrode will be red hot
with the pilot on.
On a new installation with air in the gas line, it is suggested that a
match be used. The match will light the pilot faster than the piezo
under this condition.
To Conserve Gas: Turn off pilot when heater is not in use.
TO ON/OFF DEVICE
TO ON/OFF DEVICE
Figure 6
Page 11
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