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If your boiler is equipped with the optional WF-2U-24
water feeder, continue to keep the thermostat calling for
heat after the low water cut off recognizes the low water
condition. After a one minute time delay, the water feeder
should start feeding water to the boiler. The feeder should
feed for one minute, and then go into another one minute
waiting period. This cycle of alternately waiting and feeding
should repeat until:
For Model 67D-1 fl oat type low water cutoffs
1.
- as the
water level raises the fl oat above the burner cut off
switch level, the burners should ignite. The water
feeder remains powered until the water level raises the
fl oat to the water feeder switch level, satisfying the
water feeder.
For Model PS-802 probe type low water cutoffs
2.
- the
water level will rise until water in the boiler makes
contact with the probe, satisfying the water feeder, and
igniting the burners.
In either case, there should be between one and two inches
of water visible in the gauge glass when both the water
feeder is satisfi ed, and the burners are allowed to ignite.
The time delays in the feed cycles are designed to prevent
the boiler from fl ooding due to slow return lines.
To check the pressure limit, run the boiler until the pres-
sure reaches system demand. Then turn the pressure
screw and drop the pressure setting until the boiler shuts
down. This will show that the pressure limit is operating
properly.
Refer to control manufacturer’s instructions (enclosed) for
more information.
Check thermostat operation. When set above temperature
indicated on the thermometer, boiler should ignite. Make
certain the thermostat turns off the boiler when room tem-
perature reaches the selected setting and starts the boiler
operating when room temperature falls a few degrees.
Finally, set the thermostat for the desired temperature.
Special conditions in your home and the location of the
thermostat will govern this setting.
CHECKING AND ADJUSTING
Figure 19 - Igniter