Mitsubishi Electric R410A Manual page 12

Tr iple evacuation
in
S tep 1 Evacuate the system to 1000 microns from both service valves.
To measure the vacuum a vacuum gauge must be used at
all times - do not use a system manifold gauge
S tep 2 Break the vacuum with O FN to 14 PSIG
S tep 3 Evacuate to 500 microns
S tep 4 Repeat Step 2
S tep 5 Evacuate to the lowest pressure that the pump will achieve
(200 microns for a minimum of 1 hour)
S tep 6 The rise test must then be carried out for a minimum of 30 minutes
Page 10
6 easy steps