102
3.
1.
2.
Fig. 52
Draining the boiler on the heating water side
A
Fig. 53
1.
Close the shut-off valves on the heating water side.
2.
Route hose at drain valve
A
into a suitable con-
tainer or drain outlet.
3.
Open drain valve
A
and drain the boiler as much
as required.
Troubleshooting
Maintenance
(cont.)
5789 302 GB
Diagnosis
Summary of Contents for B2TB
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