5. System descriptions and diagrams
Introduction
The system diagrams show possible connections for safety equipment as an example. These
examples are represented by dot-dash lines.
Should a temperature regulator (TR) or safety temperature monitor (STM) or additionally a
pressure limiter (PL) be required, you must use a control valve with fail-safe action that complies
with DIN 32730.
The heating circuit must be equipped with a TR/STM combination if it is stipulated in DIN 4747
Part 1.
A Pressure Limiter (PL) must be installed if DIN 4751requires it.
You are required to install a TR/STL combination in a primary drinking water heating circuit, if
required by DIN 4753.
5.1 System code number 1.0
, only heating
Weather-compensated flow temperature control with variable limitation of the return flow tem-
perature
Fig. 11
⋅
Anl 1
(system code number 1.0)
20
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