Airedale Air Cooled Condensers R410A - Manual (Page 14)

CR12
– CR105
Condensers
14
Condensers
Installation & Maintenance : 6680953 V1.2.0 02/2013
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 sufficiently 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.
CAUTION To comply with the PED directive, the unit is factory pressure tested and recorded
on the Test Certificate 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).
CAUTION Pressure testing can be dangerous if not properly conducted; personnel
undertaking pressure testing MUST be technically competent and
suitably qualified.

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):

Use a high vacuum pump and connect to the high and low pressure sides of the
system via a gauge manifold fitted with compound gauges, a high vacuum gauge
should be fitted 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