6
Installation and operation manual BM mini
www.laing.de
www.laing.de
www.laing.de
Filling of the system
It is mandatory to flush the floor heating loops before putting the system
in operation, because otherwise malfunction or damage to the pump may
result. We recommend using two fill valves on the primary side of the BM
mini as shown in picture 2. Alternatively, the system can be filled using fill
valves installed elsewhere in the system. In any case, it is necessary to
positively flush the system since otherwise the air in the system will not be
purged completely. Filling the system via the integrated manual air vent
(see picture 7) is not possible! Please observe the position of the ball valve
in the bypass. If this is in the vertical position, the floor heating loops are
hydraulically uncoupled from the boiler loop. This position is ideal for nor-
mal operation (see picture 1) since the pump in the heating loop does not
influence the floor heating loop. With the valve in this position, however, the
floor heating system cannot be filled from the primary side.
To fill the floor heating loops from the heating loop side, this ball valve must
be closed (horizontal) – see pictures 2 through 6. After filling, the valve
must be opened again (vertical position). Please observe that when filling
from the primary side radiator valves on that side should be closed in order
to have maximum pump pressure available for purging the floor heating
loops.