Heating Circuit Control - Viessmann VITOTRONIC 100 Installation And Service Instructions Manual

Boiler water temperature control
Control sequence
The boiler goes cold:
Set value -2 K
The burner start signal is set for a
set boiler water temperature of -2 K,
and the burner starts its own moni-
toring program.
The burner start may be delayed by
a few minutes subject to the number
of the auxiliary circuits and the com-
bustion type.

Heating circuit control

Brief description
The boiler control unit provides a
constant temperature.
With room thermostat Vitotrol 100,
type UTD:
The heating circuit is regulated by
the Vitotrol 100.
Vitotrol 100 switches the heating cir-
cuit pump and the burner subject to
the coding settings.
Coding addresses that influence
the heating circuit control:
01, A2, F5, F6, F7.
For a description, see the coding
overview.
Functions
The heating circuit is subject to the
boiler water temperature and its con-
trol range limits.
The heating circuit pump is the only
actuator.
Function description
(cont.)
The boiler heats up:
Set value +2 K
The burner shuts down.
33