Instantaneous Heating Water Heater - Viessmann Vitocal 300-G BW Installation And Service Instructions Manual

Instantaneous heating water heater

Parameter
■ 7900
Setting an electric booster heater
(accessory) fitted into the heating flow.
Otherwise it cannot be controlled by the
control unit.
!
Please note
If this parameter is used to block
the electric heater, then the
instantaneous heating water
heater cannot protect the system
against frost (frost protection
function).
To block, use "Heating with
electro" (parameter 7902) or
"DHW with e heating" (parame-
ter 6015, page 150).
Access
■ "Device settings"
■ "Programming"
■ "Electric heater"
■ y to "Inst.htg.water heat"
■ "YES" or "NO"
Electric heating
Parameter
■ 7902
Heating operation with the instantane-
ous heating water heater.
Control settings, electric heater
Operating instructions
Standard setting
Setting range
Operating instructions
No
Yes/No
151