Preparation For Use; Checking For Leaks - Vaillant V 12-060 M2W 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 (suitable for R410a refrigerant)
4 Non-return valve
5 Gauge lines
6 Nitrogen cylinder
Warning!
Use of high pressure gas - risk of injury. Pressure
testing should only be undertaken by competent
and qualified persons.
• 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.
Caution 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.
Split Type Installation Manual
Preparation for Use 12
• 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 service manifold 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.
Note!
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.
EN 21