182
To enable an additional, external heat
source.
If there is a corresponding heat demand,
the external heat source can also be
started by the heat pump control unit.
Note
All other parameters for the external heat
source become visible only when this
parameter has been set to "YES".
"Yes"
External heat source, e.g. oil
condensing boiler is ena-
bled.
"No"
External heat source is not
used.
Menu
■
"Device settings"
■
"Programming"
■
"Ext. heat source"
■
"Ext. heat source"
Delivered condition
No
Setting
Yes/No
Priority of external heat sources
Priority of the external heat source over the instantaneous heating water heater
(accessory).
"Yes"
External heat source has pri-
ority.
"No"
Instantaneous heating water
heater has priority.
Menu
■
"Device settings"
■
"Programming"
■
"Ext. heat source"
■
"Priority"
Delivered condition
Yes
Setting
Yes/No
Dual-mode temperature
Outside temperature limit for operating
the external heat source.
If the average outside temperature is
lower than the set limit temperature over
a longer period (
"Dual-mode temp"
),
the external heat source is switched on.
Requirement: The heat pump and/or
other heat sources cannot meet the cur-
rent heat demand on their own.
Control settings, external heat source
Enable external heat source
5414 828 GB
Summary of Contents for VITOCAL 350-A
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Page 62: ...62 Type AWH I 1 Installation sequence Installing the heat pump cont 5414 828 GB ...
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