10. Connect the vapour valve (F) of the R-452A
recovery bottle to the recovery machine.
The system is ready for vapour recovery.
R-452A vapour recovering
1. Open Vapour valve (F).
2. Start the Recovery machine.
3. Open hose (B) service valve
4. Open the manifold gauge valve (1,4).
The R-452A vapour is going from the com-
pressor to the R-452A recovery bottle.
All manifold gauge valves (1,2,3,4)
are opened.
5. Check the pressure values indicated on the
two manifold gauges.
Wait until the needles from the 2 mani-
folds gauges indicate -0,67 bar (-20
inchHg).
Do not go to the next step before
reaching
-0,67bar (-20 inchHg) in order to pre-
vent flare up of residual refrigerant.
This specific effect has to be taken into
account especially in case of work in
height (fall risk).
The R-452A is recovered
6. Close hose (B) service valve.
7. Close the manifold gauges service valve (2).
8. Stop the recovery machine.
9. Wait for 15 minutes
After 15 minutes
If pressure has raised:
Repeat the Recovery procedure from step 1
If -0,67 bar (-20inchHg) maintained
Go to next step
10. Disconnect the recovery machine.
Dispose the R-452A recovery bottle accord-
ing local legislation.
End of recovery procedure
11. Purge with Nitrogen.
For more information about nitrogen
instruction:
Refer to the brazing instruction 98-60068-
00 available from CTE partner
The refrigerant circuit is ready for unbrazing
operation.
Perform unbrazing operation under nitrogen.
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