Stage 9 -Electrical Control Connections - Neptronic SKG3 Series Installation Instructions Manual

Electrical Control
Neptronic® SKG3 Steam Humidifier has a modulating control system and requires
Connections
an analogue control signal.
All controls connections have been grouped on a specific Interface P.C.B.
Dip switch for adjustment of RS-485
No effect on SKG3 Humidifier operation
JP1 & JP2
Internal connectors
Humidifier
Neptronic® SKG3 Steam Humidifier has three interlock entries:
Interlocks
Stage 9 –Electrical Control Connections
P1
RS-232 Connection
DS1
P1
RS-232
O
1
N
DS1
ALARM
COM NO
TB2
1 2
TB2
Alarm contacts Terminal
Electrical Control connection interface - Fig. 41
 High level humidistat contact should be wired between terminals TB1 2 & 3
In case of opening of this contact. Operation of humidifier will stop and Alarm
message will be displayed.
 P.D. Switch contact should be wired between terminals TB1 2 & 4.
In case of opening of this contact. Operation of humidifier will stop. No Alarm
message will be displayed.
 A third interlock switch can be wired between terminals TB1 2 & 5.
In case of opening of this contact. Operation of humidifier will stop and Alarm
message will be displayed..
SKG3 Steam Humidifier
2 3 4 5
1
X
6 7 8 9
ANLG OUT
DUCT
HUMID.
2 3
ROOM
HUMID.
CTRL
DEMAND
+ -
A B
INTER
TB3
LOCK
RS-485
PD
SWITCH
HI-LIM
24 VAC
FAN 700MA
MAX.
NC COM NO NC
TB1
3 4 5 6
2 3 4 5
1
X
P1
6 8
7 9
RS-232
ANLG OUT
HUMID.
O
1 2 3
N
ROOM
HUMID.
DS1
CTRL
DEMAND
+ -
A B
INTER
TB3
RS-485
SWITCH
HI-LIM
24 VAC
ALARM FAN
700MA
COM NO NC COM NO NC
TB2
1 2 3 4 5 6
Interlocks connections - Fig. 42
30
TB3
RS-485 Connection
Bacnet Port (2 wires twisted pair)
TB1
Interlock and control signal Terminal
DUCT
LOCK
PD
MAX.
TB1
HI LEVEL HUMIDISTAT
P. D. SWITCH
OTHER SAFETY INTERLOCK