ITR POLAR HD, Installation And Operating Manual

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Section 5, Installing Fan Heaters
5-2 POLAR™HD Heating Module
5.2 Fan 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 5-1 shows how to wire up the aquastat in a fan.
Figure 5-1: Wiring the Fan’s Aquastat
• If a “passive” radiant heat system is desired (i.e.
baseboard or fin and tube configurations), consult ITR
for recommended installation procedures and design.