Modulating Control Wiring - Nortec NHTC Installation And Operation Manual

Modulating Control Wiring

Air Proving
Switch
2520266 - Digital Duct Humidistat
Package
Analog Out - 3
24 VAC - 2
Ground - 1
23 | Installation
High Limit Humidistat
Control Humidistat
Note: 1 Install On/Off controls or jumper between
terminal 1 and 2 of humidifier in order to run.
2 Terminal 1 is 24 VAC Hot, turn unit off to
avoid shorting while wiring.
3 High Limit Humidistat must be duct mounted.
It can be On/Off or modulating.
4 Control Humidistat can be mounted in space
or in return air duct and can be On/Off or
modulating.
5 The NHPC can only accept one modulating
signal.
Humidifier Terminal Strip
Figure 21: Modulating Controls
Connect 24 VAC, terminal
1 of NHTC/PC to terminal
2 of controllers.
Figure 22: Digital Modulating Humidistats
1510142 - Digital Wall Humidistat
Insert On/Off
controls or jumper
between 1 and 2
E
x
t
N
e
Or
H
r
n
T
a
C
l
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal (NHTC only)
6 - 5 VDC
7 - Ground
8 - Blower Pack
9 - Blower Pack
N
H
P
C