Installation Data
Pressure Testing
In accordance with PED 97/23/EC, a strength test should be carried out in order to ensure that all interconnecting
joints, pipework and components are suciently strong to cater for maximum permissible operating pressures. Once
installation is completed, the high pressure side of the system should be strength tested with dry nitrogen.
NOTE: To comply with the PED directive, the unit is factory pressure tested and recorded on the Test Certicate
provided.
Split Systems:
Ensure additional in line system components will withstand the intended SYSTEM PED recommendation test pressure.
If not, we recommend isolation where possible, eg in line HP/LP switches, pressure transducer(s) and compressor(s).
• Record the pressure over a minimum of 60 minutes to detect major leaks (a 24 hour period should preferably be
allowed), on the Commissioning Sheet provided
• If a reduction in pressure is detected, trace the leak and repair before conducting a further pressure test and
charging
Evacuation
Evacuation for systems operating on R410A refrigerant should be carried out as follows (for other refrigerants refer to
Airedale for advice):
• All system valves (i.e. liquid line solenoids, EEVs, shut o valves etc) need to be open to allow evacuation.
• Use a high vacuum pump and connect to the high and low pressure sides of the system via a gauge manifold
tted with compound gauges, a high vacuum gauge should be tted to the system at the furthest point from the
vacuum pump
• The system should be evacuated to 0.5 Torr and if achieved no further evacuation steps are required
• Triple evacuation should be used to ensure that all contaminants are removed if initially 0.5 Torr could not be
achieved
• Operate the vacuum pump until a pressure of 1.5 Torr (200 Pa) absolute pressure is reached, then stop the
vacuum pump to break the vacuum using oxygen free Nitrogen until the pressure rises above zero
• The above operation should be repeated a second time
• The system should then be evacuated a third time but this time to 0.5 Torr absolute pressure
Pressure testing can be dangerous if not properly conducted; personnel undertaking pressure
testing MUST be technically competent and suitably qualied.
CR12 - CR165 50/60Hz CONDENSERS
16 Condenser Technical Manual 6666879 V2_02_2020
Installation
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