A.O. Smith Theta T Series Installation, User And Service Manual page 76

3.6.3
3.6.4
76
Installation-, User- and Service Manual
Terminal Type
1 Earth
2 Live
3 Neutral
Note
Fit cables in the strain relief.
Caution
The controller, as the controller of the water heater, is phase-sensitive. It is absolutely
essential to connect the mains live (L) to the live of the water heater, and the mains
neutral (N) to the neutral of the water heater.
Caution
There must be no potential difference between neutral (N) and earth ( ). If this is the
case, then an isolating transformer must be used in the supply circuit.
Connecting DHW pump
The Theta dual service module is supplied with a DHW-pump (3-wire connection,
230 V ). You must connect this pump to the controller of the dual service system.
AC
Terminal Type
17 Earth
18 Neutral
20 Live
Note
Fit cables in the strain relief.
Connecting heating pump
The heating pump (3-wire connection, max. 0,8A) is mounted in the heating system. You
must connect this pump to the controller.
Terminal Type
14 Earth
15 Live
16 Neutral
Note
Fit cables in the strain relief.
Colour Description
yellow/green Earth control.
brown Live input control via isolator.
blue Neutral control.
Colour Description
yellow/green Earth DHW-pump.
blue Neutral DHW-pump.
brown Live output of controller to DHW-pump.
Colour Description
yellow/green Earth heating pump.
brown Live output of controller to heating pump.
blue Neutral heating pump.