Installation-, User- and Service Manual
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2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
3-way mixing valve
The control opens and closes the 3-way mixing valve in order to control the flow of
(warm) water through the plate heat exchanger. With this (warm) water the water in the
heating system is heated with this water.
Note
The supplied 3-way mixing valve does not need to be adjusted. This valve is set at the
factory and must be installed according the installation diagram in paragraph 3.4. The
configuration of the 3-way mixing valve can be checked according the instruction in
paragraph 11.5. When an alternative way of connection is desired, please contact
A.O. Smith
.
DHW pump
The controller controls the DHW pump. The DHW-pump is mounted in the DHW-side of
the Theta dual service system. The modulating controlled pump ensures sufficient flow of
(warm) water through the plate heat exchanger on the DHW-side of the plate heat
exchanger.
Heating pump
The controller controls the heating pump. The heating-pump is mounted in the heating
side of the Theta dual service system. The ON/OFF-pump ensures the flow of (warm)
heating water through the plate heat exchanger on the heating side of the plate heat
exchanger.
Note
The heating pump is not part of the Theta dual service module and is thus not included
with the Theta dual service module, because it’s size depends on the corresponding
heating system.
Temperature sensor
The controller measures with temperature sensor S
5
the temperature of the heating
water in het heating supply pipe. This sensor is mounted, directly after the plate heat
exchanger, on the heating supply pipe.
Room thermostat
The controller controls the desired room temperature. Depending on the desired
temperature the controller controls the 3-way mixing valve, DHW-pump and/or heating
pump to reach the desired room temperature.
Important
Two different types of thermostats can be connected to the Theta dual service module.
To the controller a 24 V ON/OFF- or 230 V Switched Live Thermostat (SWL-thermostat)
can be connected. An OpenTherm of other thermostat does not work in combination with
the Theta dual service module.
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