Specifications
DRAFT FAN CONTROL UNIT
The Control Panel (Fig.10) includeds an LED Primary Limit Controller which is set at the tempera-
ture desired for the temperature of the water jacket of the boiler. A probe is clamped to the top of
the boiler to monitor this temperature. This is normally set at 160 degrees Fahrenheit.
When the temperature of the water is less then the Aquastat setting, the speed of the Draft Fan is
raised to maximum RPM, forcing air into the combustion chamber. This creates the highly efcient
gasication process in the combustion chamber. The fan remains on as long as the boiler is op-
erational.
Packed with the boiler is a pump which would be used in the circulating loop. (Fig. 2 - Plumbing
Connections - Page 11) This increases internal water heating efciency, as it actively circulates the
water within the boiler. This pump is activated when the boiler is turned on and shuts off at 150°F.
The Aquastat is made up of two temperature indicators.
The top numerical indicator is the temperature of the water in the boiler water jacket. This is moni-
tored by a probe that lies in the upper portion of the boiler water jacket.
The lower numerical indicator displays the desired boiler water temperature setting. This is con-
trolled by the increment-decrement buttons on the right side of the Aquastat.
The Overheat Indicator Lamp will light when the unit exceeds 220 degrees Fahrenheit.
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