• Expansion Tank
Subject
Descrip
�
on
Part’s Function
The cold water filled into the central heating system expands as it is heated up. The tank
prevents the expanding water from increasing the water pressure.
Impact in Case of Malfunction
The pressure in the central heating circuit may increase and there may be water discharge
from the safety valve.
Main Associated Error Codes
F40
Error Diagnostics-Test Method
and Maintenance
1- Measure the gas pressure of the expansion tank.
Test and Maintenance
Descrip
�
on
Test and Maintenance Method
Expansion Tank Gas Pressure
Measurement
Drain the water in the central heating system. Then measure the gas pressure from the
expansion tank’s pressure relief valve using a manometer. The measured pressure value
should be greater than 0.5 bar. Otherwise, gas must be added until the pressure reaches 1
bar. (If a pressure drop occurs in the expansion tank within 6 months after adding gas, the
expansion tank should be replaced.)
Must be bigger
than 0.5 bar.
Table 2
8
78
Summary of Contents for CONFEO PREMIX P 14 HM
Page 1: ...SERVICE MANUAL CONFEO PREMIX CONDENSING BOILER CONFEO PREMIX P 14 20 24 28 30 35 HM HCH HST...
Page 24: ...12 ELECTRICAL DIAGRAM Figure 15 24...
Page 34: ...Low Voltage Removing installing the pump cable FAN PWM CABLE Figure 39 Figure 40 34...
Page 52: ...Figure 76 Figure 77 52...
Page 83: ......
