A.O. Smith Theta T Series Installation, User And Service Manual page 77

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