Installation
6 720 645 504 (2011/04) en
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10 Installation
10.1 Collector system
Installation and filling
Installation and filling of the collector system should
comply with applicable laws and regulations. Soil used
for refilling around the collector hose must not contain
stones or other sharp objects. Pressure test the
collector system before refilling to ensure that the
system is watertight.
When cutting the collector, it is important that no dirt or
gravel enters the system. This can cause blockages in the
heat pump and damage components.
Condensation insulation
Condensation insulation should be mounted on all parts
of the collector circuit system.
Filling unit
A filling unit is required and should be installed close to
the collector circuit inlet.
Vents
To avoid operational disturbances because of air
bubbles, a microbubble separator with a venting nipple
is required and should be installed between the filling
unit and the heat pump.
Expansion vessel, safety valve, pressure gauge
The expansion vessel, safety valve and pressure gauge
are to be provided by the dealer.
Membrane expansion vessel in the collector circuit
Select membrane expansion vessel according to:
The values apply at a pre-pressure of 0.5 bar.
Antifreeze/Corrosion preventative
Freeze protection until –15 °C should be ensured. We
recommend the use of ethylene glycol.
10.2 Heating system
Flow over the heating system
When the heat pump works with a buffer tank, there can
be significant variations in the flow into the heating
system. However, there must be a certain minimum flow,
which is solved by:
In the event of a radiator system, the setting for the
radiator thermostats must be limited to a minimum
temperature of 18°C.
In the event of a floor heating system, a minimum water
flow must be guaranteed by ensuring that there are
circuits without room temperature control or with a
bypass in the floor heating distributor.
This guarantees cooling of the heating system's
circulation pump and correct measurements of the flow
sensor. A slight increase in flow rate above the minimum
flow is accepted.
Expansion vessel
Select expansion vessel in accordance with BS
EN 12828.
Particle filter
A particle filter for the heating system is included in the
delivery and should be installed on the connection for
heat transfer fluid in (heating system return).
A particle filter for the collector circuit is included in the
delivery and is installed between the filling unit and the
heat pump close to the connection for collector circuit
in.
A particle filter for hot water is included in the delivery
and should be installed on the connection for hot water
return.
See also the system solutions ( Chapter 8.2).
Ethylene glycol
Glycol is not normally used in the heating system. In
special cases, where increased protection is required,
glycol can be added with a maximum concentration of
15%. Heat pump performance will however decrease.
Safety valve
Pursuant to EN 12828, a safety valve should be used.
The safety valve must be installed vertically.
Only qualified installers may carry out the
installation. The installer must follow
applicable rules and regulations and
recommendations from the supplier.
Model Volume
HC 22 25 litres
HC 33 35 litres
Tab. 16 Volume membrane expansion vessel
WARNING:
B No other anti-freeze may be used in the
heating system.
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