Nortec NH-EL Series - Manual (Page 46)

43 | Start Up
Nortec Digital Controls
Nortec provides optional On/Off, Modulating Control, or Transducer digital controls. Figure 38
and Figure 39 show the function and meaning of the Digital Control’s display and buttons. All
controls are available either wall mounted or with a remote sensor for duct mounting.
Figure 38: Modulating and On/Off Digital Control Operation
Demand Control
The modulating controls use a PI control algorithm to transmit a 0-10V control signal to the
humidifier. Adjust the setpoint to the desired setting by using the up/down arrow buttons on
the controller.
On/Off Control
The On/Off controls use a PI control algorithm to open and close a relay that opens and closes
the humidifier’s security loop. Adjust the setpoint to the desired setting by using the up/down
arrow buttons on the controller.
Output signal is shown on
modulating controller
proportional to the demand.
State of On/Off humidistat
Setpoint (RH%)
Humidity (RH %)
Indicates the
humidistat is on.
A half moon
indicates it is off.
Snowflake indicates the
setpoint is being
overridden by outdoor
temperature. Option button accesses
sensor calibration.
See troubleshooting
Increase / Decrease Setpoint
Power button turns
off the humidiistat if
pressed for 2 seconds
Caution:
 Improper control configuration can result in over humidifying which can result in damage
to property.
 See Advanced Control Configuration if the controls displayed in the humidifier Status
screen do not match those connected to the humidifier.