Schwank supraSchwank - Manual (Page 19)

supra/primo Manual
IM091112
RD: APR 2013
RL: 13B
19
12. LIGHTING INSTRUCTIONS
A Open the isolation valve in the main gas line and turn gas control knob on the combination
gas valve to the “ON” position.
B Switch on electrical circuit by turning the thermostat to the highest temperature setting.
C The heater should attempt ignition and remain lit within thirty seconds. Note that the corre-
sponding exhaust fan is operating properly.
D If ignition does not occur, then cut off electrical power by turning the thermostat to off posi-
tion.
A. Turn off electrical circuit for temporary shutdown.
B. Turn off the electrical circuit, close gas stop-cock in gas supply line, and turn gas control knob to
the “OFF” position for complete shut-down.
Under certain conditions in some locations/environments, surface discoloration may occur on the
heater body where the products of combustion discharge from the heater. This discoloration is
due the deposit of ambient air borne particulate or gases that have passed through combus-
tion. The combustion of fuel gas in a clean environment will not cause any discoloration. The
discoloration does not affect the operation of the heater nor the manufacturer’s warranties.
13. SHUT DOWN INSTRUCTIONS
If heater back-fires during operation it must be turned off
immediately.
Indication of back-firing
:
A. Loud ignition noise, then followed by dis-
tinct hissing sound.
B. Little or no visible burning on the ceramic
tile.
C. Combustion is taking place inside the
burner body.
Cause & remedy of back-firing
:
A. Improper gas pressure entering the venturi
tube = test & remedy gas pressure.
B. Breakage of a ceramic tile and or gasket =
replace damaged part.
C. Faulty sealing of the ceramic tile to the
burner body, caused by breakdown of gas-
ket material = contact your Schwank dis-
tributor.
14. DISCOLORATION OF HEATER BODY
WARNING