Checking The Strainer In The Cold Water Pipe; Gb062; Heat Exchanger; Checking The Expansion Vessel - Buderus Logamax GB062-24 KDE H V2 Service Manual

6
Inspection and maintanance
6.6

Checking the strainer in the cold water pipe

B Remove the clip.
B Pull out the pressure relief valve.
Fig. 18 Removing the pressure relief valve (heating circuit)
1. Remove the clip.
2. Pull out the insert.
3. Check strainer for contamination.
3.
1.
Fig. 19 Checking the strainer in the cold water pipe
50
2.
1.
0 010 006 637-001
2.
0 010 006 636-001
6.7
GB062..K.. (Combi) appliances: Check the
plate heat exchanger
If the DHW output is insufficient :
B Check the strainer in the cold water pipe for contamination.
B Descale the plate heat exchanger with scale removal
agent approved for stainless steel (1.4401).
-or-
B Remove plate heat exchanger and replace.
1. Remove the screw.
2. Remove the plate heat exchanger.
1.
Fig. 20 Removing the plate heat exchanger
6.8

Checking the expansion vessel

The expansion vessel must be checked every year.
B Depressurise the device.
B Adjust the pre-charge pressure of the expansion vessel to
the static head of the heating systems, if necessary.
6.9 Setting the heating system operating
pressure
Display on the pressure gauge
1 bar Minimum filling pressure (when sys-
tem is cold)
1 - 2 bar Optimal charge pressure
3 bar Maximum charge pressure at maxi-
mum heating water temperature must
not be exceeded (pressure relief
valve will release).
Tab. 13
If the indicator is below 1 bar when the system is cold :
2.
0 010 005 834-001
Logamax Plus GB062