28
en
MEDT
Heat transfer fluid
Adjustment range: 0 … 3
Factory setting: 0
Heat transfer fluid:
0 : Water
1 : Propylene glycol
2 : Ethylene glycol
3 : Tyfocor
®
LS / G-LS
MED%
Antifreeze concentration
in Vol-% (MED% is not indicated when MEDT 0 or 3 is used.)
Adjustment range: 20 … 70 %
Factory setting: 45 %
Thermostat function for backup heating
Note:
The thermostat function is only available when the slide switch is in the
centre position.
BH O
Thermostat switch-on temperature
Adjustment range:
0 … 95 °C [30 … 200 °F]
Factory setting: 60 °C [110 °F]
BH F
Thermostat switch-off temperature
Adjustment range:
0 … 95 °C [30 … 200 °F]
Factory setting: 65 °C [150 °F]
Note:
The thermostat switch-on temperature can only be lower than or equal
to the thermostat switch-off temperature.
The thermostat function can be used for backup heating. S3 is used as the refer-
ence sensor.
If the temperature falls below the thermostat switch-on temperature BH O, relay
R2 is energised for backup heating. If the thermostat switch-off temperature BH F
is exceeded, the relay switches off.
The thermostat function is deactivated, if the thermostat switch-on temperature
and the thermostat switch-off temperature are set to an identical value.
Note:
When the holiday mode is active, the thermostat function will be sup-
pressed.
Backup heating suppression
BHMN
Comfort temperature
Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F]
Factory setting: 55.0 °C [110.0 °F]
When solar loading is in progress, backup heating will be suppressed until the
temperature at S3 falls below the comfort temperature
BHMN
.
When
BHMN
and
BH O
are set to identical values, the function will be deacti-
vated.
t1 (2, 3) O
Thermostat switch-on time
Adjustment range: 00:00 … 23:45
Factory setting: 17:00
t1 (2, 3) F
Thermostat switch-off time
Adjustment range: 00:00 … 23:45
Factory setting: 19:00
In order to block the thermostat function for a certain period, there are 3 time
frames t1 … t3. The switch-on and switch-off times can be adjusted in steps of 15 min.
