MAINTENANCE INSTRUCTIONS
36
6.4 Draining the central heating system
If the need arises to drain the system, this can be done
as follows:
•
Switch the system to “WINTER” mode and ignite the
boiler.
•
Switch off the power supply to the boiler.
•
Wait for the boiler to cool down.
•
Connect a hosepipe to the system drain point and
locate the other end of the hose in a suitable
drainage system.
•
Open the system drain valve (see fig. 1).
•
Open the air vents on the radiators, starting with the
highest and moving down the system to the lowest.
•
When the system has been drained, close the
radiator breather valves and the drain valve.
•
If only the boiler needs to be drained, close the
flow/return isolating valves on the heating circuit
and open the drain valve located at the bottom of the boiler on the pump manifold (see fig. 1);
■
Draining the domestic hot water system
If there is a danger of freezing, the domestic hot water system should be drained. This can be done as follows:
•
Close the mains water supply valve.
•
Open all the hot and cold water taps.
•
On completion, close all the previously opened taps.
Fig. 1
Summary of Contents for RK 34/B Ekobox
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