Section 5, Installing Fan Heaters

5.2Fan System Operation

ITR fans consist of a 12 VDC brushless fan and heater coil similar to a radiator.

When the heater unit comes on, the fan draws ambient air from the interior, blows it through the heater coil and back into the interior through a vent. There must be an input and output vent for each fan unit.

Features

•ITR heater fans can be supplied with a built-in aquastat, which prevents fan operation until the system has reached minimum operating temperature. The aquastat can be deleted to meet particular installation requirements, but it is recommended that all systems be installed with the air fan aquastat. Figure 5-1shows how to wire up the aquastat in a fan.

Figure 5-1: Wiring the Fan’s Aquastat

5-2

The Oasis™ Heating Module