24 NIBE VVM 300
Installation
Commissioning and adjusting
Preparations
Check that the switch (8) is set to “0”.
Check that valves (44) and (50) are fully open and that the
temperature limiter (6) has not tripped (press the button
firmly).
Filling the hot water heater and the heating
system
Q The heater is filled by first opening a hot water tap
and then opening the filling valve (46) fully. This valve
should then be fully open during operations. When
water comes out of the hot water tap this can be
closed.
Q Open the filling valve (49). The boiler part of the heat
pump and the radiator system are now filled with wa-
ter.
Q After a while the pressure gauge (42) will show rising
pressure. When the pressure reaches 2.5 (bar) (approx.
25 mvp) a mixture of air and water starts to emerge
from the safety valve (52). The filling valve is then
closed (49).
Q Turn the safety valve (52) until the boiler pressure
reaches the normal working range (0.5 - 1.5 bar).
Venting the heating system
NOTE! The pipe from the tank/double jacket must be
drained of water before air can be released. This means
that the system is not necessarily bled despite the flow of
water when the safety valve (52) is opened for the first
time.
Q Bleed VVM 300 through the safety valve (52) and the
rest of the heating system through the relevant venting
valves.
Q Keep topping up and venting until all air has been re-
moved and the pressure is correct.
Commissioning and adjusting
LEK
A
r
t.n
r
.
611??
?
2
1
bar
3
04
44
6
50
44
8
52
42
51 80
Recovery of
temperature
limiter
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