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W415-0275 / E / 07.13.10
3.0 VENTING
3.1 VENTING SAFETY SWITCH
!
WARNING
RISK OF FIRE, MAINTAIN SPECIFIED AIR SPACE CLEARANCES TO VENT PIPE AND APPLIANCE.
This is a vented appliance and must be connected to a chimney in accordance with the current installation
codes. In absence of local codes, install to the current CAN/CGA B149 in Canada or to the current National
Fuel Gas Code ANSI Z223.1 in the United States. This model can be common-vented.
A minimum four inch diameter (4" Ø) B-vent or class A vent is required. A minimum 10' vent height is required.
Secure the B-vent to the exhaust collar on the appliance top with 3 screws. In cold climates, the use of a B-
vent and an insulated chase is recommended.
Under extreme vent confi gurations, allow several minutes (5-15) for the fl ame to stabilize after ignition. Provide
a means for visually checking the vent connection to the appliance after the appliance is installed.
TAMPERING WITH THE SAFETY SWITCH CAN RESULT IN CARBON MONOXIDE POISONING AND
POSSIBLE DEATH.
!
WARNING
This thermally activated switch, located in front of the draft
hood, senses an increase in temperature and acts as a
safety shut-off, see "A". It shuts down the gas to the main
burner in the event of a severe downdraft of air or a blocked
or disconnected chimney fl ue. If the fl ue is blocked or has
no "draw", the safety switch will automatically shut off the
supply of gas to the main burner within 10 minutes.
This switch must be manually reset by depressing the
plunger.
1
2
3
B
A
PLUNGER
HI LIMIT
SWITCH