Selecting The Boiler Sequence At The Vitotronic 300-K - Viessmann VITOTRONIC 300 Installation And Service Instructions Manual

Commissioning

Selecting the Boiler Sequence at the Vitotronic 300-K

42
Vitotronic 300, GW5B & MW1B Installation and Service
Subject to the set codes in the "Cascade" group and
internal control calculations, the control unit offers various
boiler sequences.
Coding addresses that influence the boiler sequence:
"38" Changing the lead boiler and the boiler
sequence
"39" Permanent lead boiler
"3A" Permanent last boiler
"41" to "44" ECO thresholds
H Via the ECO threshold, every boiler can be blocked or
enabled subject to the outside temperature.
H If the boiler is required to achieve the set supply
temperature in the case of enabled boilers failing, the
ECO threshold is disabled.
H At least the lead boiler remains active if all boilers in
a system are blocked by the ECO threshold.
1. Press .
2. "Boiler sequence"
3. Select the required boiler sequence and confirm with
OK.