Start Up - Vaillant VAI 6-025 WN Installation Manual

MAINTENANCE
Fig. 12.3 Low pressure manometer reading with the low
valve open.
• Close the valves on the service manifold and disconnect
the vacuum pump.
• Check the manometer needle after approximately 10�15
minutes have elapsed: the pressure should not rise. If it
does rise, there are leaks in the circuit. Please repeat the
process described on the section 12.1, Checking for leaks.
a WARNING!
• Do not proceed to the next step until a satisf-
actory evacuation of the installation has been
completed.
Fig. 12.4 Low pressure manometer reading with the low
valve closed: checking for leaks.
a WARNING!
Danger of malfunction and leaks.
• Ensure that the service valves on the outdoor
unit are closed.
12.3

Start up

Fig. 12.5 Filling the installation.
18
Legend
1 Two-way valve
2 Actuation faucet
• Open the two�way valve by twisting the allen key 90º
anticlockwise and close it after 6 seconds. The installation
will be filled with coolant.
• Check the installation again for tightness:
- If there are leaks see section 12.4.
- If there are no leaks, continue.
• Remove the service manifold.
• Open the two and three�way service valves by twisting the
allen key anticlockwise as far as it will go.
Fig. 12.6
Legend
1 Three-way service valve
2 Allen key (not supplied) to open valves
3 Two-way shut off valve
• Seal the two and three�way service valves with the
corresponding protective covers.
Fig. 12.7
Legend
1 Service hole lid
2 Two and three-way valve covers
1
• Connect the unit and run it for a few moments checking
that it carries out its functions correctly (for more
information see the user manual).
2
1
3
Opening of the two and three-way valves.
1
Protective covers.
VAI 6 WN-I_EN - 06/14 - Vaillant
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