Worcester 6 KW Instruction Manual page 14

TECHNICAL INFORMATION
11.2.3 6-11KW COMBI
Fig. 12 Unmixed and mixed heating circuit
An absolute prerequisite for the connection is that a minimum flow of at
least 70% of the heating system volume can be maintained throughout
the year.
* If a bypass is used and an external circulation pump is fitted, the flow
over the heating system can be reduced by 40% of the heating system
volume of the heat pump. Ensure that most of the thermostat valves are
fully open. Otherwise an accumulator tank of at least 100 litres in
capacity must be installed. The bypass length must be at least ten times
that of the pipe's inner dimension.
For explanations to the system solutions ( 11.2.1).
14
The particle filter [E21.V101] is installed horizontally in
the return heating pipe to the heat pump,
6 720 802 421-05.1I
6 720 806 768 (2013/02)