External Heat Exchanger - Viessmann VITOSOLIC 200 Installation And Service Instructions Manual

Function description

External heat exchanger

In systems with several consumers,
either an individual or all consumers can
be heated via the external heat
exchanger. The consumers can be
assigned via parameter "HE-cylinder".
Note
The consumers will be heated up to the
selected set temperature (delivered con-
dition 60 °C).
Version 1
System
3
4
5
6
7
122
Hyd. Type
2
3
2
2
2
We differentiate between two versions:
1. Systems with several consumers and
a separate primary pump for each
consumer.
Sensor S9 inside the external heat
exchanger NTC sensor, 20 kΩ.
2. Systems with one consumer or sev-
eral consumers with consumer selec-
tion via valve.
Sensor S9 inside the external heat
exchanger NTC sensor, 20 kΩ
■ External heat exchanger pump (pri-
mary circuit) on:
Temperature differential between the
collector temperature sensor and the
cylinder temperature sensor > start
temperature differential "ΔTon"
■ Consumer pump (secondary circuit)
on:
Temperature differential between the
sensor in the external heat exchanger
and the cylinder temperature sensor >
start temperature differential "HE
ΔTon"