Flushing The Heating System; Connecting The Heat Pump, Hwdu And Heating System; Pump Diagram - Available Pump Head - Worcester GREENSOURCE 6 kW Installation Manual

Connecting to the heating system

Flushing the heating system

It is important that all previously mentioned preparations have been carried out
before the heat pump is connected to the heating system. Also ensure the heating
system has been well fl ushed before the heat pump is installed. Flushing protects
the heat pump from contamination.
Faults in the heat pump can be caused by poor water quality in the radiators/
underfl oor coils or that air is penetrating the system continuously. Oxygen causes
corrosion products in the form of magnetite and sediment, which is detrimental to
the heat pump components and reduces its working life.
Existing heating systems which require regular fi lling or where the heating water
is not clear when drained, requires cleansing and fl ushing before the installation
of a heat pump. Do not use any water treatment additives except agents for raising
the pH level.
Connecting the heat pump, HWDU and heating
system
Use the information in section Dimensions, clearances and plumbing connections to
connect the different parts of the heating installation.
In addition, to avoid vibration transfer between the heat pump and the pipe system
we recommend fi tting fl exible hoses at the inlet and outlet of the heat pump,
which are supplied.
Between the heat pump and the house we recommend 28 mm copper pipe for
lengths of less than 20 metres. The pipes must be insulated with a material,
such as class 0 Armafl ex, which cannot absorb moisture. Venting valves must be
provided on the pipes. Short outdoor pipes reduce heat losses.

Pump diagram - Available pump head

Diagram: Pump for heating system (G1)
Pos 3
Pos 2
Pos 1
Water fl ow [l/h and l/s]
Only qualifi ed installers may carry
out the installation. The installer must
follow applicable rules and regula-
tions and recommendations from the
manufacturer.
18
Note