J&E Hall JCC2, Technical Manual

Page: 11 / 26

Issue: 01.02.2016 Page 11
Installation
Evacuation & Charging
Once pressure testing has been completed, the system can now be evacuated to remove air and any moisture from the piping. This can
be done as follows:

Ensure any nitrogen charge is safely released from the system.

Connect a gauge manifold to the schrader connection on the service valve on the condensing unit.

Connect a vacuum pump and vacuum gauge to the system.

Evacuate the system until vacuum is below 250 microns (0.25 torr).
Note: A triple evacuation procedure is recommended for all new systems or where moisture is suspected.
Once the system is isolated and the vacuum pump is switched off, any rise in pressure indicates that either there may be a leak in the
system or moisture is still present. In this case, recheck the system for leaks, repair as necessary, and then restart the evacuation
procedure. Once completed satisfactorily, the vacuum pump and vacuum gauge can be removed.
At this point, any additional refrigerant charge can be added to the system as required. Additional refrigerant must be charged in the
liquid phase. Use calibrated weighing scales to add the correct amount.
With the gauge manifold connected and closed, slowly open both of the service ports fully on the condensing unit. This will release the
refrigerant charge from the condensing unit into the system.
Systems are pre-charged with refrigerant for pipe runs up to 7.6 metres
Additional refrigerant charge (Note: Revised charges)
 JCC2 25E matched with J5LC15C – Pre Charged with 0.83kg R410A
Additional Charge – 10g per metre up to maximum permissible

JCC2 40E matched with J5LC20C – Pre Charged with 1.38kg R410A
Additional Charge – 15g per metre up to maximum permissible

JCC2 50E matched with J5LC25C – Pre Charged with 1.54kg R410A
Additional Charge – 15g per metre up to maximum permissible

JCC2 60E matched with J5LC28C – Pre Charged with 1.80kg R410A
Additional Charge – 20g per metre up to maximum permissible
Important Note:
Moisture prevents proper functioning of the compressor and the refrigeration system. Ensure that
a good quality vacuum pump is used to pull a minimum vacuum of 250 microns (0.25 torr).