NTI INSTALLATION MANUALS
Part 7 - Connecting Electrical Service
B. Internal Wiring Details
Boiler
Pump
Bl
Bk
Igniter
C.H.
Pump
Pump
D.H.W.
Gas valve
Br
Bl
Br
Bl
Bk
Wh
DHW PUMP
CH PUMP
L
L
N
N
1
N
L
CN8
1
1
CN2
CN3
POWER-IN
CH PUMP
FUSE 5AT
N L
DHW PUMP
FUSE 5AT
Detection electrode
DHW
PUMP
CH
FUSE 5A
PUMP
Fan
1
Bk
120 V AC
Wh
G N L
Gr
CN23
CN1
CN7
CN4
CN9
1
EBUS 2 TT2 TT1 System sensor Tank sensor Outdoor sensor
CN24
CN10
1 T B 5V IN TT2 OD TNK SYS TT1 120V 120V 120V 120V 120V 120V CN6 BUS
HISTORY ON/OFF MODE OK ESC RESET
CN5
Bk
Bl
Rd
Br
CN18
CN16
1
CN22
1 CN12
1 CN20
CN26
1 CN19
1
Bl
Rd
Bl
Br
Wh
Bk
Rd
Rd
Br
Br
Br
Bk
Bk
Rd
Br
Br
Gry
Wh
Bl
Return temp. probe Outlet
temp. probe
Flue temp. probe
Diverter valve
D.H.W.
temperature sensor
D.H.W.
Flow
sensor
Water
pressure switch
GATEWAY WIFI
Figure 53 - Electrical Wiring Diagram
51
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