Boiler Temperature Control Of The Vitotronic 300 Gw5B - Viessmann VITOTRONIC 300 Installation And Service Instructions Manual

Function Description

Boiler Temperature Control of the Vitotronic 300 GW5B

60
Vitotronic 300, GW5B & MW1B Installation and Service
Brief description
H The boiler water temperature is regulated by starting
and stopping the burner or through modulation.
H The set boiler water temperature is specified by the
Vitotronic 300-K cascade control unit.
Functions
The boiler water temperature is captured by the following
equipment:
Upper control range limits
H High limit safety cut-out 210° F (99º C)
H Temperature controller TR 203/212/230° F
(95/100/110º C)
H Electronic maximum temperature limit:
– Setting range: 68 to 260° F (20 to 127º C)
– Changed via coding address "06" in the "Boiler"
group.
Lower control range limits
H In standard mode and when frost protection is enabled,
the boiler water temperature will be regulated subject
to the respective boiler.