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

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Installation-, User- and Service Manual
77
3.6.5
3.6.6
Note
The composition of the Theta duel service module has influence on the selection of the
required heating pump. To select the right heating pump, the table below shows the
characteristics, of the heating side, that affect the choice of heating pump.
Theta Dual
Service Module P
(kW)
ΔT
Specifications plate heat exchanger
heating side
flow
(m
3
/h)
ΔP
(kPa)
T(M) 20 6 20 36-30 2,9 8
T(M) 20 10 20 40-30 1,7 9
T(M) 20 20 20 70-50 0,9 2,5
T(M) 30 6 30 36-30 4,3 10
T(M) 30 10 30 40-30 2,6 6,5
T(M) 30 20 30 70-50 1,3 5
T(M) 40 6 40 36-30 5,8 17
T(M) 40 10 40 40-30 3,5 11
T(M) 40 20 40 70-50 1,8 9
Connecting heating sensor
Note
This sensor (S
5
-
12kΩ NTC) must be mounted on the heating supply pipe as close as
possible to the plate heat exchanger.
Terminal Type Colour Description
J13
1 - grey Temperature sensor S
5
3 - grey Temperature sensor S
5
Note
Fit cables in the strain relief.
Connecting 3-way mixing valve
The Theta dual service module is supplied with a 3-way mixing valve (3-wire connection,
230 V
AC
). You must connect this valve to the controller.
Terminal Type Colour Description
6 Live

black
Live output of controller to 3-way mixing
valve (Opens hot water supply from water
heater)
8 Live

brown
Live output of controller to 3-way mixing
valve (Opens return water supply from plate
heat exchanger).
9 Neutral bleu Neutral 3-way mixing valve.