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▶ The circuit must be pressurized when venting is complete. Turn the
valves on the filling unit to pressure increase position and pressurize
the circuit to 2.5 to 3 bar ( Figure 30). Make sure the expansion
vessel has an air pocket corresponding to approximately 1/3 of the
total volume, by using the de-airing valve on top of the expansion
vessel
Fig. 30 Filling units in pressure increase position
▶ Turn the valves of the filling unit to normal position ( Figure 31) and
turn off the pump on the filling station.
Fig. 31 Filling units in normal position
▶ Disconnect the hoses and insulate the filling unit.
If other equipment is used, the following is required, among other things:
• A clean container with capacity for the amount of collector circuit fluid
that is required
• An additional container for collection of contaminated collector
circuit fluid
• Submerged pump with filter, flow capacity of min. 6 m
height of 60 to 80 m
• Two hoses, Ø 25 mm
14
ELECTRICAL CONNECTIONS
DANGER: Risk of electric shock!
▶ Switch off the main power supply before starting work
on the electrical part.
All regulation, control and safety devices on the heat pump are
connected and checked upon delivery.
The heat pump's electrical connections must be able to
be isolated safely.
▶ Install separate safety switch that cuts all current to
the heat pump. A safety switch for each supply is
required for separate power supplies.
▶ Install a separate earth breaker for the heat pump.
▶ According to applicable regulations for connecting supply voltage.
Select cable area and cable type that corresponds to the relevant fuse
rating ( Chapter 11.3) and routing method.
▶ Connect the heat pump to the electric box connection strip according
to BS EN 60335 part 1 and via a switch with a minimum contact
distance of 3 mm (e.g. fuses, LS switch). Other consumers must not
be connected.
▶ Follow the relevant wiring diagram when connecting an earth breaker.
Only connect components that are approved for each market.
▶ Observe the colour coding when replacing circuit boards.
6 720 806 768 (2013/02)
6 720 641 570-07 .1I
6 720 641 570-08 .1I
3
/h, pressure
ELECTRICAL CONNECTIONS
27
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