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