Boiler Manual
Part Number 550-110-593/1099 15
Prepare boiler — vent damper installation
These systems are used on gas-fired boilers with vent dampers as shipped from factory. Boiler will not operate
without vent damper installed.
Only vent dampers listed in the Replacement parts list on page 61 are certified for use with CGa boilers. Any
other vent damper installed could cause severe personal injury or death.
4. Read and apply the harness plug warning label
(shown above) so that it is visible after installation.
5. Plug damper harness receptacle into damper harness
plug.
Bypassing (jumpering) vent damper
will cause flue products such as
carbon monoxide to escape into the
house. This will cause severe
personal injury or death.
After boiler has operated once, if
either end of harness is
disconnected, the system safety
shutdown will occur. The boiler will
not operate until harness is
reconnected.
Effikal damper — Damper hold
open switch must be in Automatic
Operation position for system to
operate properly.
Figure 8 Vent damper assemblies
Damper blade
Standing pilot ignition systems— Refer to vent
manufacturer’s instructions to install plug (shipped with
damper) in damper hole. For standing pilot boilers only,
install plug with 3
/
8" diameter hole in vent damper
hole.
Spark-ignited pilot systems— Refer to vent
manufacturer’s instructions to install plug (shipped with
damper) in damper hole. For spark-ignited pilot boilers only,
install plug with no hole in veper