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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 pipe system has been well fl ushed before it is connected to the
heat pump. Flushing protects the heat pump from contamination.
The heat pump is a part in a heating system. 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. Magnetite has a grinding effect on
the heat pump pumps, valves and components with turbulent fl ows such
as the condenser. Heating systems which require regular fi lling or where
the heating water is not clear when drained, requires remedial measures
before the installation of a heat pump, for example the heating system must
be fi tted with fi lters and vents. Do not use any water treatment additives
except agents for raising the pH level.
An intermediate heat exchanger is sometimes necessary to protect the
heat pump.
Connecting the heat pump to the heating
system
Use the information in section Dimensions, clearances and plumbing con-
nections to connect the different parts of the heating unit.
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.
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 Armafl ex, which cannot absorb moisture. Venting valves
must be provided on the pipes. Short outdoor pipes reduce heat losses.
Connecting three-way valve
Connect a 3-way valve if the hot water heater is to be included. A descrip-
tion how to connect a ESBE type three-way valve is given to the right.
The ESBE 3-way valve must be installed on the return line according to the
system solution. Some 3-way valves are designed to be located on the fl ow
line. If such a valve is used, install it on the fl ow line
Heat carrier pump G2
Connect G2 and the shut off valves. The fl ow across G2 must be set slightly
lower than the fl ow across G1.
Note
Only qualifi ed installers may carry out
the installation. The installer should
observe applicable rules and regula-
tions and recommendations from the
supplier.
Port B:
From heating
system
Port AB: To heat pump
17
Connecting to the heating system
Port A:
From hot water
heater.
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