STIEBEL ELTRON HPG-I 04 S Premium - Multifunctional Assembly (MFG); Overview of the Components of the Multifunctional Assembly (MFG); Incorrect Circulation During DHW Charging or Heating Operation; Frequent WW Charging in Cooling Mode

Repair instructions
HPG-I 04-06-08-12-15 S-CS-DS-DCS
Premium
TQR
Page 38 from 48
D0000095883-c
15.3 Multifunctional Assembly (MFG)
15.3.1 Overview of the components of the multifunctional assembly (MFG)
Position
Description
1
Automatic air vent (close during operation!)
2
Electronics board (AA07) with plug-in connections
3
Switching valve (MA12)
4
Overpressure safety valve (3bar)
5
Emergency/auxiliary heating (E1)
6
Safety temperature limiter (BT55) with manual release
7
Flow rate and temperature sensor, heating circuit (BF01/BT07)
8
Pressure sensor heating circuit (BT10)
15.3.2 Incorrect circulation during DHW charging or heating operation
Depending on the operating mode, the flow temperature into the heating circuit should not
increase significantly during DHW charging and vice versa. If there is
a significant temperature increase,
there is a fault on the changeover valve in the multifunction group (AA07). Check the function of the
multifunction group.
15.3.3 Frequent WW charging in cooling mode