6
x
Controller and electronic components
6.3.1 Replacing the inflow temperature sensor /
return flow temperature sensor and pressure
sensor
1. Remove the protective cover (see chap. 4.4.3).
2. Remove the upper panelling of the heat cell (see chap. 4.8.3).
3. Disconnect the connector from the sensor being replaced
(fig. 6-3, item 2).
4. Unscrew the sensor being replaced with an open-ended
spanner WAF 15.
5. Screw in the new sensor and connect the cable and
connector.
– The connectors are shape-coded. Do not force the con-
nector!
–
Comply with the stipulated tightening torque (see
chap. 12.3).
t
V1
Inflow temperature sensor (boiler circuit)
t
V2
Internal mixer sensor = inflow temperature sensor (heating circuit)
t
R
Return flow temperature sensor (boiler circuit)
22
Heating circulation pump
23
Burner blower
DS
Pressure sensor
FLS
Flow sensor
3UV DHW
3-way distribution valve
3UVB1
3-way mixer valve
Fig. 6-3
Position of sensors and motors on the boiler
WARNING!
There is a danger of scalding from heating water.
Sensors are connected directly to the pressurised heating
water.
●
Before removal of the sensors, close the ball cocks on the
boiler inflow and boiler return flow, and depressurise the
system with the KFE cock.
WARNING!
Use of an unauthorised temperature sensor causes the safety
and control functions to malfunction.
●
Replacement parts must at least satisfy the technical
requirements defined by the manufacturer. This is the case,
for example, with original spare parts.
Summary of Contents for GCU compact 315
Page 81: ...13 x Notes 13 Notes...
Page 82: ...13 x Notes...
