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

N

N

L

L

1

N

L

CN8

1

1

CN2

CN3

POWER-IN

FUSE 5AT

CH PUMP

DHW PUMP

FUSE 5AT

Detection electrode

N L

DHW

PUMP

CH

FUSE 5A

PUMP

Fan

1

Bk

CN1 T B 5V IN TT2 OD TNK SYS TT1 120V 120V 120V 120V 120V 120V G N L 120 V AC 1 CN24 CN4 CN10 1 CN6 CN9 CN23 BUS

Wh

Gr

CN7

EBUS 2 TT2 TT1 System sensor Tank sensor Outdoor sensor

HISTORY ON/OFF MODE OK ESC RESET

CN5

Bk

Bl

Rd

Br

CN18

CN16

1

CN22

CN26

1 CN12

1 CN20

1 CN19

1

Bl

Rd

Bl

Gry

Br

Bk

Wh

Rd

Rd

Br

Br

Br

Gry

Rd

Br

Br

Bk

Wh

Bl

Return temp. probe Outlet

temp. probe

Flue temp. probe

Air pressure switch

Water

pressure switch

D.H.W. Flow switch

Diverter valve

GATEWAY WIFI

56 Figure 70 - Electrical Wiring Diagram