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82
Wiring Diagrams
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
8
Wiring Diagrams
Figure 24:
R
6 A
Drain
Pump
Fill 1
Stack
Hi-Limit
R
Bk
Float Board
J1
Br
Bl
R
R Bk
Blower
Relay
7
8
3
4
5 1 6 2
N
L
EXTERNAL
INTERNAL
Transformer
24V
On/Off
Switch
1
2
3
4
Gr/Y
S
Legend:
Wire Colors
R - Red
W - White
Bk - Black
Bl - Blue
Br - Brown
O - Orange
Y - Yellow
Gr - Green
Gr/Y - Green & Yellow
L1
L2
Blower 1
M
PWM
PS -
PS +
GND
HS out
1
R
W
Bk
Gr
L1
L2
Blower 2
M
PWM
PS -
PS +
GND
HS out
1
R
W
Bk
Gr
Bl
Br
Bk
Bk
Gr
Bk
W
Air Pressure
Switches
Gas Valve1
GN
D
TH
V2
V1
Ignition
Module 1
GN
D
TH
V2
V1
Ignition
Module 2
W
R
Spark
Igniter
Spark
Igniter
W
R
R
W
R
Gr
Br
Bk
S
S
Y
R
Gr/Y
24
VA
C
Security Loop
GN
D
GN
D
FTB
D
CH
1
CH
2
+10 VD
C
1 2 3 4 5 6 7 8 9
R
R
R
Y
Y
Gr
Fill 2
Tank
Hi-Limit
O
R
Tank
Temp
Bk
R
Bk
Bk
Bk
Gr
Bk
R
Gr
Bk
Gr
Bk
R
CONTROL SIGNAL
CONNECTIONS
PRIMARY VOLTAGE
CONNECTION
EXTERNAL
INTERNAL
W Bl
R W Bl
M
Bk
M
Drain Valve
(optional)
Bk
Gas Valve2
2-Burner
Units Only
Bk
2-Burner
Units Only
CO
M
Remote Fault PCB
NO
NC
Steam
Unit ON
Error
Service
CO
M
NO
NC
CO
M
NO
CO
M
NO
Low voltage
terminal strip
Bk
R
3 or 4-Burner
Units Only
Continued on
next wiring diagram
D
C
3 or 4-Burner
Units Only
Continued on
next wiring diagram
3 or 4-Burner
Units Only
Continued on
next wiring diagram
A
3 or 4-Burner
Units Only
Continued on
next wiring diagram
B
Gr/Y
Gr
Gr
Gr/Y
Gr/Y
Gr/Y
Gr/Y
W
1
2
ON CTS
S1
3 or 4-Burner
Units Only
Gr/Y
Br
Br
W
R
Gr
Br
W
R
Gr
R
Bk
R
R
R
R
Y
Gr/Y
R
J2
J5
J15
J16
J14
J1
J10
J3
J7
J8
J17
J11
J9
J12
J6
J13
float
pwm1
pwm2
fill 1,2,3
ext
ntc
power
a/p
ignition1
ignition2
RS485-2
RS485-1
24Vout
pmp_fre
drn_blower
digi inputs
DRIVER
BOARD #1
R
JP1
JP
2
Bl
ethernet
USB
comm port
RFB
ACC
J22
LED
J18
display
J17
display
U
U
U
U
J15
J1
J2
J3
J6
J12
J10
J14
J19
J23
J21
J16
INTEGRATED
CONTROL
BOARD
Modbus
Linkup
battery
SIM
card
JP11
JP8
JP7
JP4
GN
D
TH
V2
V1
Ignition
Module
W Bl
+
_
Br
R
Rectifier
Note 1
For GS 23, 45, 90 models
rectifier is required for
each gas valve.
For GS 23, 45, 90 models
see Note 1
Bk
R
Gr/Y
Wiring Diagram - Nortec GS 50/100/150/200/300/450/600
JP4 Jumper, for activating the termination resistor for Modbus or BACnet MSTP network.
J6 Connector, Modbus (RS485 interface)
JP7 Jumper, for activating Modbus or BACnet MSTP communication via connector J6.
JP8 Termination, Linkup system
J10 Connector, Linkup