Solar Function With Thermostat Function; Relay Kick - Viessmann SDIO Installation And Service Instructions For Contractors

Version with SDIO/SM1A electronics module and...

Solar function with thermostat function

This function always requires a 2nd cylinder as a pre-
heating cylinder, which is preheated by solar energy or
a wood heating system, for example. The temperature
of the preheating cylinder is determined via sensor
(TS3).

Relay kick

To prevent the pumps and valves from seizing up, they
are started for about 10 s every 24 h.
Function description – version with SDIO/SM1A
(cont.)
When the temperature for the preheating cylinder set
at the thermostat is reached, the transfer pump is acti-
vated to transfer heat to the main cylinder.
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