Parameter Group Electric Heater; Enable Instantaneous Heating Water Heater; Enable Instant. Heating Water Heater For Central Heating - Viessmann VITOTRONIC 200 Service Instructions Manual

Parameter group electric heater

Service menu:
1. Press OK + å simultaneously for
approx. 4 s.
2. "Coding level 1"

7900 Enable instantaneous heating water heater !

If an instantaneous heating water heater
is installed in the secondary circuit flow,
it must be enabled. It can be enabled
either for DHW reheating only ("Enable
electric heaters for DHW heating
6015") and/or for central heating ("Ena-
ble instant. heating water heater for
central heating 7902").
!
Please note
By setting "0" for parameter
"Enable instantaneous heating
water heater 7990", no frost pro-
tection is guaranteed.
For the instantaneous heating
water heater to be able to start in
the case of a heat demand for
frost protection, set parameter
"Enable instant. heating water
heater for central heating
7902" to "0", but "Enable
instantaneous heating water
heater 7900" to "1".

7902 Enable instant. heating water heater for central heating !

If the set flow temperature cannot be
achieved with the heat pump, an instan-
taneous heating water heater installed in
the secondary circuit flow can be started
for central heating.
Parameter group electric booster heater
3. "Electric heater"
4. Select parameter.
Delivered condi-
tion
0
Note
An instantaneous heating water heater
must be enabled separately with param-
eter "Enable instantaneous heating
water heater 7900".
Setting range
0 / 1
125