6 – 20 Aquarea air/water heat pump – Installation manual for compact systems 03 / 2013
Hydraulic installation
The customer is responsible for ensuring that the device does not
freeze. Please use one of the following options to do so:
The heating circuit is operated with a food safe antifreeze mixture
(40 % propylene glycol mixture) for temperatures down to -20 °C)
An additional heater unit in the compact unit prevents the heating
circuit freezing.
The heating circuit is drained by a system to be provided by the
customer (manual or automatic).
³ Fill the system as follows:
³ Open all thermostatic radiator valves of the heating system, and all
other shutoff valves where applicable.
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³ Keep adding water or antifreeze mix until the manometer reaches
the nominal pressure.
³ Vent the system (see the Commissioning section). Then check the
pressure again and add liquid if necessary
Type of pipes/Fittings Minimum thickness of insulation layer
Internal diameter up to 22 mm 40 mm
Internal diameter from 22 mm to 35 mm 60 mm
Internal diameter from 35 mm to 100 mm 2 × internal diameter
Recommended thermal insulation of heat distribution and hot water pipes
³ Insulate the pipes in accordance with the latest UK building
regulations, although the below is recommended:
Warning!
In compact systems, there is a
risk of freezing if the heating cir-
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outside temperature falls below
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damage to the device.
Warning!
To prevent damage to the heat
pump from lime scale, please
consult BS 7593 “Code of
practice for treatment of water
in domestic hot water central
heating systems”.
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Manometer
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