SK300-XL Steam Humidifier
Installation Instructions and User Manual
16
Stage 6 – Electrical Control Connections
Safety
Contacts
Neptronic® SK300-XL Steam Humidifier has two safety contacts.
(Fig. 16)
High level humidistat
contact must be wired in series with
P.D. Switch
contact and
humidistat signal between terminals TB1 & 2
In case of opening of any on this contact. Operation of humidifier will stop and
Alarm
message will be displayed.
Humidifier
Control with
humidity
controller
Neptronic® SK300-XL modulating Steam Humidifier can be installed in conjunction
with Neptronic®
HRO
and
SHC
humidity controller.
(Fig. 17)
5 Vdc
Low voltage control
terminal block
High limit humidistat
Differential pressure switch
5 Vdc
4
3
2
1
2
1
F
Fuse
humidistat
Pressure
Differential switch
High limit
switch
Control terminal
block wiring
HRO20
SK300 XL
COM
24 VAC
MOD
%RH
1
6
1
4
1
5
1
3
3
F
1
2
4
8
7
6
9