5
Product details
6 720 612 217 (05.03)
1.4
Description of function
For a simplified diagram of the system,
refer to Figure 2 on page 16.
Temperature differential regulator
The temperature differential regulator
controls the operation of the solar heat-
ing system pump.
• The solar heating system pump is
switched on when the difference
between the solar panel tempera-
ture
and the storage tank temper-
ature
exceeds the ON threshold
of
8 K (°C).
The display shows the sun symbol
and the
symbol moves (Fig. 3).
• The solar heating system pump is
switched off when the difference
between the solar panel tempera-
ture
and the storage tank temper-
ature
falls below the OFF
threshold of 4 K.
The sun symbol disappears from the
display and the
symbol stops
moving (Fig. 3).
ON threshold
for solar heating sys-
tem pump:
-
≥
temperature difference of 8 K
OFF threshold
for solar heating sys-
tem pump:
-
≤
temperature difference of 4 K.
Storage tank temperature limiter
The storage tank temperature limiter
prevents the domestic hot water
becoming too hot:
Normal setting
= 60°C.
Function:
• The solar heating system pump is
switched off if the storage tank tem-
perature sensor reading
exceeds
the set temperature. The
symbol
stops moving and
max
flashes
• The solar heating system pump is
switched on again as soon as the
storage tank temperature drops
below the set temperature limit by
4 K. The
symbol moves and
max
disappears from the display (Fig. 4,
page 16).
Warning:
Risk of
scalding from storage
tank temperatures
over 60 °C!
B
Fit a thermostatic mix-
er to the hot water
draw off pipe and set
to 60 °C max.
