Nortec RH2+ - Manual (Page 24)

21 | Installation
Fan Enable Wiring
When distributing steam into a duct, there can be a call for humidity when there is no air flow.
Either the RH2 or the Nortec On/Off digital humidistat can be used to enable a fan on a call for
humidity. Wiring below is for a typical furnace installation. Consult the air handler’s installation
manual for exact wiring instructions on how to enable the fan.
RH2 Fan Control
The RH2 can be used to turn on a furnace fan where there is a demand for humidity without a
call for heat.
*Humidifier will not start producing steam until fan security loop is closed.
Nortec On/Off Humidistat Fan Control
Nortec digital On/Off humdistats include a second dry set of points to enable a fan where there
is a call for humidity without a call for heat.
Figure 22: RH2 Fan Enable Wiring
Figure 23: Nortec Digital On/Off Humidistat Fan Enable
Fan Enable