Preparation For Use; Checking For Leaks; Evacuating The Installation - Vaillant climaVAIR VAM 2-050 W2N Installation Manual

12 Preparation for Use

This consists of the following steps:

• Checking for Leaks.

• Evacuation of the installation.
• Start up.
• Troubleshooting.
12.1 Checking for leaks
Fig. 12.1 Checking for leaks in the installation.
Legend
1 Suction valve (gas)
2 Return valve (liquid)
3 Service manifold
4 Non-return valve
5 Gauge lines
6 Nitrogen cylinder
• Connect a service manifold set to the service port on
the gas line stop valve of the outdoor unit.
• Connect a nitrogen cylinder to the charging hose of
the refrigerant gauges.
• Carefully open the valves on the service manifold to
allow the nitrogen to enter the installation. Do not
open the service valve on the outdoor unit as this will
release the pre-charged refrigerant from the outdoor
unit.
• In the event of using R-410A coolant set it to 40
bar(g) of pressure, for 10/20 min.
• Check that all the connections and joints are gastight.
If any leaks are found, repair and start the process
again from the beginning.
• On satisfactory completion of the test, close all the
valves on the combined meter and remove the
nitrogen cylinder.
• Release the pressure from the system by slowly
opening the valves on the service manifold.
• Do not continue to the next step until the pressure
test has been successfully completed.
Split Type Installation Manual
Preparation for Use 12
According to Regulation 842/2006/EC, the complete
refrigerant circuit must be periodically checked for
leakage. Take the necessary actions to ensure these
tests are performed and the results correctly logged into
the maintenance record of the machine. The leakage
test must be done with the following frequency:
• Systems with less than 3 kg of refrigerant => periodic
leakage test not needed
• Systems with 3 kg or more of refrigerant => at least
once every 12 months
• Systems with 30 kg or more of refrigerant => at least
once every 6 months
• Systems with 300 kg or more of refrigerant => at least
once every 3 months

12.2 Evacuating the Installation

12.2 Evacuating the installation
Legend
1 Suction valve (gas)
2 Return valve (liquid)
3 Service manifold
4 Non-return joint
5 Gauge lines
6 Vacuum pump suitable for refrigeration systems
• Connect a service manifold to the three-way valve on
the gas line of the outdoor unit.
• Connect a vacuum pump to the charging connection of
the service manifold.
• Ensure that the the service manifold valves are closed.
• Turn the vacuum pump on and open the service
manifold shut off valve to open the system to the
vacuum pump
• Ensure that all other valves are closed.
• Leave the vacuum pump functioning for approximately
15 minutes (depending on the size of the installation)
to carry out the vacuum.
• Check the needle on the low pressure manometer: it
should indicate -0.1 MPa (-76 cmHg - >3 Torr). If the
service manifold gauge is not capable of measuring to
these pressures a separate Torr gauge should be fitted
in line to measure this pressure.
EN 19