ISOMIX F-IM-DE-W-UK-01-2021-Rev4 | Part no. 10070292
7
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ENGLISH
8.3 Temperature limiter
In the event of a fault, the temperature limiter switch-
es off the circulation pump and so avoids overheating
of the surface heating system�
• The temperature limiter must be fitted to the supply of the
heating circuit manifold.
• Set the temperature on the (optional) temperature limiter to
approx. 55 °C.
8.4 Initial commissioning
1. Connect the control station to the pipe network.
2. Shut off the ball valves (15).
3. Switch off the pump and close all of the heating circuits
on the distributor.
It is sufficient to close the valves in the return of the
heating circuit manifold with the protection caps�
4. Fill the manifold and control station with hot water (in
accordance with VDI 2035):
5. connect the filling hose to the fill and drain valve on the
return (9b, Fig. 8-3) and the draining hose to the fill and
drain valve on the supply (9a, Fig. 8-3).
Heating circuits are closed�
6. Open both fill and drain valves and fill the manifold and
control station until water comes out of the fill and drain
valve on the supply. Close both fill and drain valves.
7. To fill and flush the heating circuits, connect the filling
hose to the supply fill and drain valve (9a, Fig. 8-4) and
the emptying hose to the return fill and drain valve (9, Fig.
8-4).
8. Open the heating circuit to be flushed.
9. Open fill and drain valve and flush out the heating circuit
in the direction of flow until the air and any contamination
has been removed from the circuit completely.
The non-return valve (14) in the mixer bypass prevents
any short circuit when flushing�
10. Repeat the process for all the heating circuits.
Fig. 8-3
Fig. 8-4
NOTICE
Flushing is permitted only in the direction
of flow of the heating circuits, i.e. the water must enter
through the flow manifold and come out of the return!
The drain must always be open, as otherwise the high
water pressure could damage the heating system.
The instructions on flushing in the operating manual
for the heating circuit manifold must also be observed.
8.5 Setting the floor flow temperature
The adjustment handwheel on the thermostat head has a
scale of 1 - 7 (A, Fig. 8-5 Setting of the supply temperature).
The set temperature should be taken from the table:
A
B
B
C
Fig. 8-5 Setting of the supply temperature
1
2
3
4
5
6
7
20 °C
28 °C
37 °C
45 °C
53 °C
62 °C
70 °C
8.6 Limiting the floor flow temperature
Flow temperatures above 50 °C are not usually used for sur-
face heating systems.
The system temperature is often significantly lower than the
maximum value that can be set on the thermostat head. To
avoid damage to the floor structure from excess temperature,
the flow temperature set value can be limited and locked in
on the thermostat head.
1. Set the temperature and, with the surface heating run-
ning, check it on the thermometer.
2. If it is correct, position one of the locking devices (B)
directly in front of and behind the marking arrow (C).
The setting can also be protected by an additional adjust-
ment lock (accessory: SE 148 GA) to prevent unintended
actuation.
