Section 5, Installing Fan Heaters
International Thermal Research
5-5
5.5 Procedure
After choosing the appropriate mounting location and
configuration:
1
Mount the fan using #10 sheet metal screws or wood
screws, see Figure 5-2: Mounting a Low Profile Cabin Fan.
2
If you are using ducting and a dual air outlet plate for any
fan, limit the total length of duct for both outlets to 36” for
optimum air output.
3
Select the appropriate mounting location for the
thermostat, as well as any fan speed switches. You will
wire these up to the Zone Control Board in Section 6 –
Wiring The Electrical System.
4
The Zone Control Board can control up to 5 zones. The
cabin fan 1 lead (orange) can supply up to a maximum of
10 Amps. The other cabin fan leads 2-5 can supply up to a
maximum of 5 Amps each. The total current draw is not to
exceed 18 Amps for all cabin fan leads.
5
If the system requires higher amperage draws, install a
separate relay to power the fans. This relay will use the
existing fan circuit as a signal and must be wired to a
secondary power source (not the heater’s control board).
See Figure 5-3: Installing a Relay for Additional Fan
Amperage.
6
To install plumbing lines to the fans, see Section 7 –
Plumbing the System.