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Connecting the heat pump to 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.
Connect the heat pump outdoors
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 which cannot absorb moisture, such as Armafl ex. Venting valves
must be provided on the pipes. Short outdoor pipes reduce heat losses.
Connect the heat pump indoors
The heat pump can be used for the heating system as well as for the
domestic hot water. The manual provides connection proposals that are
easy to implement and give economic operation of the heat pump. In
addition to these there are more technically complicated alternatives,
which unfortunately result in very high installation costs and complex
operation.
It is important to realise that air/water heat pumps do not cover the entire
heating demand. Below a certain outdoor temperature additional heat
must provide the power shortfall. The additional heat may be the existing
heat source or a newly installed electric cassette. At outdoor temperatures
below -10 ºC the heat pump shuts down completely. A heat pump also gives
a slightly lower hot water temperature than the existing boiler or hot water
heater.
Connect the three-way valve
A three-way valve should be connected in the circuit when using a
hot water heater. A description is given to the right how to connect
a Honeywell type three-way valve. The three-way valve is an
accessory.
Filling water in the heating system
The heating system normally has an expansion vessel with a pressure
gauge.
1. Open and close the tap between the cold water system and the heating
system in short time intervals.
2. Read the pressure on the pressure gauge.
3. Vent the system and refill to the correct pressure.
Connecting the heat pump to the heating system
Only qualifi ed installers may carry out
the installation. The installer must fol-
low applicable regulations and recom-
mendations from IVT.
The Optima heat pump is connected
to the heating system in different ways
depending on the operating mode.
Port A:
To the hot
water heater
Port AB: From heat pump
43
Note
Note
Port B:
To the heating
system
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