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13 Controller for heating circuits and DHW
13.5
The accumulator sensor is connected to terminal Z37.
The burner demand regulates the accumulator temperature.
The pump output X16 (UW) and X38 (PWM) are used for the boiler controlled pump,
which is not active below 60° C. A room thermostat can be connected via inputs Z27
and Z28. This room thermostat controls the two heating circuits via pump output Z17
(HK) and the outputs X39 and X40. The DHW sensor (Z20) is attached to the accu-
mulator and regulates the burner demand outside the heating period.
Hydraulic diagram version D:
Heat consumers are shown symbolically and can be substituted by others!
If there is more than one heating circuit, PWM pumps or the external relay box must
be used so that individual control of the pumps is possible.
Version D
Z21
TI
Z16
Z38
Z27
Frischwasser
modul
DHW-heat
exchanger
TI
Z39
Z17
Z20
Z37
Installation Manual
69
Z28
TI
TI
TI
Z40
Z17
55
50
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