oventrop Regusol X-Uno 25 Montage- Und Bedienungsanleitung Seite 73

6.1.1 Filling and bleeding of secondary circuit
1. Connect filling device (not supplied) to connec-
tion (6).
2. Open check valve (1) (illustr. 27).
3. Ball valves (3 and 4) must be opened.
4. Open fill and drain valve (5) slowly (parallel to
pipe) and fill installation until it reaches the
desired pressure.
5. Bleed installation via the vent plug (2)
6. After filling and bleeding, set check valve (1) to
operating position (illustr. 27) and close fill and
drain valve (5).
7. Check correct setting of the check valve
(arrow).
1 Check valve closed (operating position)
2 Check valve opened
1
6
5
4
Illustr. 26: Filling, bleeding
Illustr. 27: Check valve
Initial operation
2
3
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