IMPORTANT -- N
Natural G
Gas M
Models
When performing any pilot assembly servicing, make sure
you don’t tear or destroy the foil face fiber gasket located
between pilot bracket and burner casting face. Doing so will
cause pilot outages. Always make sure that if you must
remove it for cleaning the burner area that it is replaced and
properly positioned.
1. Shut off the gas supply to heater.
2. Disconnect the heater from its electrical supply.
3. Let the appliance cool down so the pilot assembly is
cool to touch.
4. Loosen the wing screw at the pilot assembly by
turning counterclockwise. (It is not necessary to
remove the screw entirely from the pilot assembly.
You need to loosen it just enough to allow you to
remove the pilot shield.)
5. When loosened, pull up on the pilot shield, exposing
the pilot bracket, pilot orifice, and thermocouple.
6. Using a soft brush or compressed air, clean the pilot
stack (pop-riveted on inside of pilot shield), of dust
and dirt, paying attention to the throat of the pilot
stack and the flame spreader at the top of the stack.
7. Brush off the top of the pointed pilot orifice making
sure dust and dirt have not plugged orifice hole. If
the orifice must be removed, use the appropriate size
wrench to loosen and remove the compression fitting
and pilot tube from the inlet of the pilot orifice. Use a
wrench to loosen and remove the pilot orifice from
the pilot bracket. Hold the orifice up to the light to
see if the hole in the orifice is clear and open. If not,
blow out with compressed air.
8. To replace the shield and the pilot orifice, reverse
above procedure.
9. Check for gas leaks.
IMPORTANT
■
The hole in the pilot orifice is drilled to a specific
diameter to match the fuel and gas pressure being
used. Do not poke or push sharp instruments into the
hole. Doing so will enlarge the hole, creating pilot light
outage problems. Clean the orifice only with
compressed air, a soft brush, or a dry rag. If necessary,
replace the pilot orifice.
■
Do not use a pliers to remove the pilot orifice. Pliers will
“round off” the the hex head nut on the base of the
orifice, creating difficulty in servicing at a later time.
Only use a wrench of appropriate size.
FIG. 9
PILOT LIGHT ASSEMBLY
14
SHIELD
BRACKET
WING SCREW
ORIFICE
TUBE W/NUTS
THERMOCOUPLE
STUD
GASKET
BURNER CASTING
