6
x
Controller and electronic components
6.3.2 Replacing the internal mixer sensor for heating
support
The internal mixer sensor t
V2
for the "ISM" heating support
function is fitted underneath the thermal insulation of the hy-
draulic line components.
1. Remove the protective cover (see chap. 4.4.3).
2. Remove the thermal insulation (see chap. 4.4.3).
3. Fold open the front panel of the controller housing (see
chap. 4.7.1). Remove the plug from connection J8 and
disconnect the sensor cable.
4. Pull the internal mixer sensor t
V2
on the cable out of the
sensor thermowell (fig. 6-4, item 1).
5. Insert a new mixer sensor into the sensor thermowell and
secure in this position with a rubber plug. Guide the cable into
the controller housing, connect to terminals 5 and 6 of PCB
plug J8 and put on the plug.
– The connectors are shape-coded. Do not force the con-
nector!
–
Comply with the stipulated tightening torque (see
chap. 12.3).
6.3.3 Changing the storage tank temperature sensor
The storage tank temperature sensor is connected directly to
connection terminals 9 and 10 of the 12-pin
J8
sensor plug on the
boiler control panel (see chap. 12.6).
1. Open the boiler control panel and disconnect the
J8
connector from the PCB control panel (see chap. 4.7.1).
2. Pull out the sensor from the sensor immersion sleeve on the
hot water storage tank.
3. Bend the pressing springs on the new sensor and push the
new sensor into the sensor immersion sleeve.
The insertion depth is marked on the ROTEX hot water
storage tank by a coloured marking depending on the storage
tank type.
4. Connect the sensor cable to the connector on connection
terminals 9 and 10 of the
J8
12-pin sensor plug.
5. Connect the connector to the PCB control panel and close the
boiler control panel.
Make sure there is sufficient tension relief on the sensor
cable.
1
Sensor thermowell for internal mixer sensor t
V2
Fig. 6-4
Replace the internal mixer sensor
For further information on installing the storage tank
temperature sensor, see the "Storage tank temperature
sensor" installation instructions.
Fig. 6-5
Replace the storage tank temperature sensor
Summary of Contents for GCU compact 315
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