NTI FTVN - Room Thermostat Wiring Connections; Outdoor Sensor Connections; Aquastat (Default) and Tank Sensor (Optional) Connections (Non-Combi Models)

50
Part 1 - General Safety Information
Part 7 - Connecting Electrical Service
Figure 52 - Electrical Wiring Diagram
HISTORY
ON/OFF
MODE OK ESCRESET
CN18
1
1
CN1
FUSE 5A
CN5
1
CN24
CN4
1
CN8
CN10
1
CN6
1
CN3
CN2
CN7 CN9
CN23
1 CN20 1 CN12
1 CN19
1
1
CN26
CN22
CN16
BUS
TB 5V IN
OD TNK SYSTT1
TT2
120V 120V 120V120V 120V 120V
NGL
120 V
AC
GATEWAY WIFI
Bk
Bl
Bl
Rd
Wh
Bl
Bl
Rd
Rd
Br
Br
Gry
Gry
Bl
Gry
Bl
Bk
Bk
Bk
Rd
Rd
Wh
Br
Br
Br
Bk
Bk
Br
Wh
Br
Bl
Br
Detection electrode
EBUS 2
TT2 TT1
System sensor
Tank sensor
Outdoor sensor
Boiler Pump
Igniter
Gas valve
Fan
Diverter valve
Water pressure switch
D.H.W. temperature sensor
D.H.W. Flow sensor
Air pressure switch Flue temp. probe Return temp. probe Outlet temp. probe
N
N
FUSE 5AT
FUSE 5AT
LN
DHW
PUMP
POWER-IN
CH
PUMP
Gr
Wh
Bk
Br
C.H.
Pump
CH PUMP
L
DHW PUMP
L
CH PUMP
DHW PUMP
NL
D.H.W.
Pump
B. Internal Wiring Details