104
Draining the secondary circuit
A
B
Fig. 56
1.
Close the shut-off valves on the heating water side.
2.
Connect hose to drain & fill valves
A
and
B
and
route into a suitable container or drain outlet.
3.
To move the diverter valve into its central position,
start the filling program for the secondary circuit.
As soon as the diverter valve is in its central posi-
tion, switch OFF the control unit.
(To start the filling program, see page 43.)
4.
Open drain & fill valves
A
and
B
, and drain the
secondary circuit as much as required.
5.
Close drain & fill valves
A
and
B
. Fit protective
cap onto drain & fill valve
A
.
Maintenance
Draining the heating water side of the heating system
5678 044 GB
Maintenance
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
Page 163: ...163 5678 044 GB ...
