Start Up - Vaillant climaVAIR VAM 2-050 W2N Installation Manual

12 Preparation for Use
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: repair
them (Check all joints and connections to the service
manifold carefully as the leak may be here).
• Close the valves on the service manifold and
disconnect the vacuum pump.
Warning!
Do not proceed to the next step until a
satisfactory evacuation of the installation has
been completed
Fig. 12.4 Low pressure manometer reading with the low valve
closed: checking for leaks.
Warning!
Danger of malfunction and leaks.
Ensure that the service valves on the outdoor
unit are closed.
20

12.3 Start Up

Fig. 12.5 Filling the installation.
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 Opening of the two and three-way valves.
Legend
1 Two-way shut off valve
2 Three-way service valve
3 Allen key (not supplied) to open valves
• Seal the two and three-way service valves with the
corresponding protective covers.
Fig. 12.7 Protective covers.
Split Type Installation Manual