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Beschikbare talen
Beschikbare talen
2.5
Safety of the Theta
dual service module
2.5.1
2.5.2
2.5.3
Safety
Against frost:
S
< 5°C
5
Against overheating of water:
S
> heating set point + 20K
5
66
Introduction
The controller, of the Theta dual service module, also has other functions besides the
control of various components, such as:
•
protection, of both pumps, against seizing;
monitoring of temperature of the heating water;
•
protection against legionella;
•
DHW detection of simultaneity (6.4 "Setting priority rule").
•
Protection of both pumps
The controller protects both pumps (DHW-pump and heating pump) against jamming
due to prolonged stand still. When the pumps are not activated within 24 hours, by heat
demand, the controller will active the pumps for a short period of time.
Monitoring heating water temperature
The controller monitors the temperature of the heating water with temperature sensor S
This sensor is mounted on the heating supply pipe, with the supplied clip. This sensor
must be mounted, as close as possible to the plate heat exchanger, on the heating
supply pipe.
Temperature protection
Description
The frost protection cuts in when the temperature of the heating water, in the heating
supply pipe (measured with temperatures sensor S
and heating pump are activated by the controller. The heating water, in the heating
supply pipe, is heated to 30°C.
The overheat protection cuts in when the temperature of the heating water, in the
heating supply pipe, exceeds the heating set point (6.4 "Heating set point") by 20°C.
The controller will de-activate the DHW-pump.
In the event that this protection is activated 3 times, there will be a blocking error on the
display of the water heater and the heating system will be switched off. This error will
disappear when the temperature of the heating water, in the heating supply pipe, is
below the heating set point (S
shooting table for displayed errors").
Note
The frost protections protects only the Theta dual service module and not the heating
system (pipes, radiators, etc.).
Important
The frost protection of the heating system (pipes, radiators, etc.) falls under the
responsibility of the user and/or installer.
), is less the 5°C. The DHW-pump
5
< heating set point). See error F20 (8.3 "Trouble-
5
.
5
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