Dhw - Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors

System configuration (parameters)
Boiler
(cont.)
1432.2 "Operating mode of primary circuit pump"
Setting
1503.0 "Minimum heating output"
Setting

DHW

Note
Parameter values in bold are factory settings.
497.1 "DHW circulation pump for auxiliary function DHW heating"
Setting
OFF
ON
497.2 "DHW circulation pump for DHW heating"
Setting
OFF
ON
94
Explanations
0 Internal circulation pump is operated with constant dif-
ferential pressure.
1 to 20 Internal circulation pump is operated with rising differ-
ential pressure.
Adjustable from 1 to 20 mbar
Explanations
A limit can be set on the minimum heating output for
heating mode.
... Delivered condition specified by settings specific to
the appliance
5 to 100 Adjustable from 5 to 100 %
Explanations
DHW circulation pump:
0 OFF during hygiene function
1 ON during hygiene function
Danger
Risk of injury due to increased DHW tempera-
ture.
Inform the system user of the risk from the high-
er outlet temperature at the taps.
Explanations
DHW circulation pump:
0 OFF during DHW heating to standard set value
1 ON during DHW heating to standard set value