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FILLING UNIT
A filling unit is included in the delivery and should be installed close to
the collector circuit inlet.
COLLECTOR CIRCUIT PUMP
Factory setting for the collector circuit pump is max ( Figure 20). The
setting may need to be adjusted to achieve the correct delta value (
Chapter 17.4). The value must lie within the grey area. To adjust the
value, turn the dial.
At cascade connection, make sure that the setting on the
collector circuit pump is max. This must be done on both
heat pump 1 and heat pump 2.
Fig. 20
EXPANSION VESSEL
It is important when installing the expansion vessel to position it at the
highest point in the circuit, preferably above the heat pump. If there is a
low ceiling making it impossible to fit the tank above the pump, it can be
positioned as illustrated in the figure to the left. It is important to install
the tank so that any air disappears upwards. If the tank is installed
incorrectly, the air will continue on in the circuit (Figure 21).
Fig. 21 Installing the expansion vessel
As an alternative to a plastic vessel a membrane expansion vessel in the
heat transfer circuit can be used.
Select membrane expansion vessel according to:
Model
6-11 Combi, 6-11 System
Table 19
ANTIFREEZE/CORROSION PREVENTATIVE
Frost protection to -15 °C should be ensured. We recommend the use of
propylene glycol.
6 720 806 768 (2013/02)
ext. in
min
min
max
max
6 720 641 855-34. 1I
Volume
12 litres
6 720 802 421-09.1I
INSTALLATION
23
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