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CONTROLS AND ACCESSORIES
SPILL SWITCH
(BLOCKED VENT SAFETY SHUTOFF)
The spill switch is a manual reset disc thermostat with
a fi xed setpoint (280° F), and normally closed contacts.
It is located at the relief opening of the draft diverter. In
the event of chimney or venting system blockage causing
products of combustion to spill out of the relief opening, the
spill switch disc heats up and the spill switch contacts will
open, shutting down the fl ow of gas to the main burners by
removing power to the gas valve.
In the event that the spill switch contacts open, the reset
button on the back of the switch will pop up. The spill
switch must be reset manually, after the switch has cooled
off, by pushing the reset button down. Check the venting
system and chimney for blockage when restoring the
system to operating condition. DO NOT operate the boiler
without a spill switch.