STIEBEL ELTRON SOM 7 SI - Manual (Page 24)

SOM 7 SI
© 08042 som_7_si.monen.ind
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Display
Code
Parameter Name
and Reference
Recommended Setting and Explanation
(All temperatures in °F)
UNIT
Units for Temperature
Display (p. 20)
FAH For most applications in North America this is
appropriate, but it is purely a matter of preference.
Please note that advanced users may desire to adjust certain parameters differently depending
on the circumstances. These suggested settings are merely a manner in which to configure the
unit that will avoid damage to the system from overheating. Installing the SOM 7 with the default
settings will likely result in an overheating condition of the solar system.
R
W
Tac o
S R 501
(T ypic al Wiring)
N H 6
N/O
5
B oiler C ontrol
B oard
Thermostat
Input
S OM 7
15 16
4.2.2.1 SOM 7 Wiring Diagram for Connection to Cold Start Boiler
In order to interface the SOM 7 with the boiler control board of a typical boiler (which does
not heat up the boiler water unless a zone calls for heat) it is necessary to incorporate a
relay circuit. Below is a wiring diagram in which a commonly used single zone controller in
conjunction with a SOM 7 is controlling such a boiler.