Calling Up The Parameter Group - Viessmann VITOTRONIC 200 Service Instructions Manual

Parameter group Electric booster heater

Calling up the parameter group

1. Service menu:
Press OK + simultaneously and hold for
å
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.
Value Meaning
"0" Instantaneous heating water heater is disa-
bled.
!
Please note
The instantaneous heating water heat-
er will not start up, even to protect the
system from frost.
To allow the instantaneous heating wa-
ter heater to start up for frost protec-
tion, select setting "1".
"1" Instantaneous heating water heater is ena-
bled.
!
Please note
If the secondary circuit is not sufficient-
ly filled with water, the instantaneous
heating water heater will overheat. This
will damage the instantaneous heating
water heater and the high limit safety
cut-out.
Fill and vent the system fully before
enabling the instantaneous heating
water heater.
Note
When setting "1" has been selected with OK,
some heat pumps will display the prompt
"Secondary circuit filled?".
The instantaneous heating water heater is on-
ly enabled if this prompt is confirmed with
"Yes". Otherwise the setting is set to "2" and
the instantaneous heating water heater is not
enabled.
7901 Enable electric heaters for DHW heating
Applies only to the lag heat pump in a heat pump cas-
cade.
The instantaneous heating water heater of the lag heat
pump can be started if the set cylinder temperature
cannot be achieved with the heat pumps in a heat
pump cascade.
224
3. "Electric heater"
4. Select parameter.
!
Value Meaning
"2" Never adjust. Instantaneous heating water
heater is not enabled. Is automatically set if
the prompt "Secondary circuit filled?" was
answered with "No".
"3" Never adjust. Instantaneous heating water
heater is enabled. Is automatically set if the
prompt "Secondary circuit filled?" was an-
swered with "Yes".
"4" Never adjust.
The instantaneous heating water heater can be used
for DHW heating and/or for central heating. This
requires the following additional enable commands:
DHW heating: "Enable electric heaters for DHW
■
heating 6015"
Central heating: "Enable instant. heating water
■
heater for central heating 7902"
!
Requirements: "Enable instantaneous heating water
heater 7900" is set to "1" on the lag heat pump.