Raypak RAYTHERM 133-4001 - Manual (Page 16)

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CAUTION: Install the vent damper to service only
the single appliance for which it is intended. if
improperly installed, a hazardous condition, such as
an explosion or carbon monoxide poisoning, could
result.
Vent Damper
Normal Operation Summary
For safe, efficient operation, the vent damper and all
flue product carrying areas of the appliance must be
checked annually, with particular attention given to
deterioration from corrosion or other sources. Check
vent damper operation as follows:
1. When the boiler is off, check that the vent damper
position indicator points to the closed position. (See
figure below.)
2. Turn the thermostat or controller up to call for heat
and check that the vent damper indicator points to the
open position. (See figure below.)
3. Turn the thermostat or controller down again and
check that the vent damper position indicator returns
to the closed position.
NOTE: The vent damper must be inspected at least
once a year by a trained, experienced service
technician. The name of the person who originally
installed your vent damper is shown on the
installation label. Damper must be in open position
when boiler main burners are operating.
Damper Position Indicator
Damper Open Damper Closed
Fig. 20: Vent Damper Position Indicator
EFFIKAL® RVGP
Fig. 21: Connection Diagram for Effikal® Vent Damper
Plumbing
Gas Supply Connections
Gas piping must have a sediment trap ahead of the
boiler gas controls, and a manual shut-off valve locat-
ed outside the heater jacket. All gas piping should be
tested after installation in accordance with local codes.
NOTE: Do not use teflon tape on gas line pipe
thread. A flexible sealant approved for the fuel being
used is recommended.
Fig. 22: Plumbing