Viessmann Vitorond 200 VD2 1080, Инструкция по эксплуатации

Страница: 10 / 32

10
Initial start-up, inspection and maintenance
Further details regarding the individual steps
(cont.)
Checking diaphragm expansion vessel and system pressure
Observe the diaphragm expansion vessel manufacturer's instructions.
Carry out this test on a cold system.
1. Drain the system or close the
cap valve on the diaphragm
expansion vessel and reduce
the pressure until the pressure
gauge indicatesĂ"0".
2. If the inlet pressure of the
diaphragm expansion vessel is
lower than the static system
pressure, top up with enough
nitrogen to raise the inlet pressure
higher than the static system
pressure (0.1 to 0.2Ăbar).
The static pressure corresponds to
the static height.
3. Top up with water, until the filling
pressure of a cool system is
higher than the inlet pressure of
the diaphragm expansion vessel
(0.1 to 0.2Ăbar).
Max. operating pressureĂ Ă6Ăbar
. . . . . . . .
5692Ă517ĂGB