Nortec NH-EL Series - Manual (Page 36)

33 | Installation
Steam
Unit ON
Error
Service
NO
COM
NO
COM
NC
NO
COM
NC
NO
COM
Remote Fault Option Wiring
The NH-EL remote fault option includes 4 relays that can provide remote status indication. The
relays are mounted to a remote fault board which is located as shown in Figure 31: Remote
Fault Wiring. The PCB with the relays includes markings which indicate the function of each
terminal on the board. The relays indicate the following status:
1 Unit On – The normally open relay is closed when the humidifier has power and the On/Off
switch is set to on.
2 Steam – The normally open relay is closed when the control board detects that the cylinder
is drawing current and steam is being produced.
3 Service – The relay can be wired to open (NC) or close (NO) when a warning is displayed on
the humidifier display and the yellow service LED is illuminated.
4 Error – The relay can be wired to open (NC) or close (NO) when a fault is detected by the
humidifier controls.
Figure 31: Remote Fault Wiring