Operating instructions

18
System details/functions
Summary
Setting
(as delivered
condition)
Setting
range
Explanation
SFĂćĂSpecial function
*1
0 to 8 0: No function
Do not adjust if a sensor is connected
to S3.
1: Maximum cylinder limit
(see pageĂ21)
2: Suppression of reloading by boiler
(see pageĂ21)
*2
3: Additional function for DHW heating
(see pageĂ24)
*2
4: Thermostat function (see pageĂ24)
*2
5: Vitotres control unit
6: VitotresĂ+ĂSF
Ă1
*2
7: VitotresĂ+ĂSFĂ2
8: VitotresĂ+ĂSF
Ă3
DT control unit
DOĂćĂStart-up temp-
erature differential
1.5
to
10.0ĂK
The control unit records the temperature
differential between the collector
temperature and the cylinder temperature,
and compares that differential with start-up
temperature differentialĂ"DO". The solar
circuit pump is started if that value is
exceeded, and the display showsĂ"ąĂ".
DFĂćĂShutdown temp-
erature differential
1.0
to
9.5ĂK
exceeded
,
and
the
display
shows
ĂąĂ.
The pump will be switched OFF if the actual
temperature falls below shutdown
temperature differential "DF".
Please note:
DO can be set to a min. of 0.5ĂK above DF,
DF a maximum of 0.5ĂK below DO.
*1
These functions only operate in conjunction with relayĂ2.
*2
Only in conjunction with connection extension.
5862Ă490ĂGB