Carrier VECTOR 1550 Series Operation & Service Manual

62-61753-218-13Procedure R-452A Recovery 2/210. Connect the vapour valve (F) of the R-452Arecovery bottle to the recovery machine.The system is ready for vapour recovery.R-452A vapour recovering1. Open Vapour valve (F).2. Start the Recovery machine.3. Open hose (B) service valve4. 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 thetwo manifold gauges.Wait until the needles from the 2 mani-folds gauges indicate -0,67 bar (-20inchHg).Do not go to the next step beforereaching-0,67bar (-20 inchHg) in order to pre-vent flare up of residual refrigerant.This specific effect has to be taken intoaccount especially in case of work inheight (fall risk).The R-452A is recovered6. Close hose (B) service valve.7. Close the manifold gauges service valve (2).8. Stop the recovery machine.9. Wait for 15 minutesAfter 15 minutes If pressure has raised:Repeat the Recovery procedure from step 1 If -0,67 bar (-20inchHg) maintainedGo to next step10. Disconnect the recovery machine.Dispose the R-452A recovery bottle accord-ing local legislation.End of recovery procedure11. Purge with Nitrogen.For more information about nitrogeninstruction:Refer to the brazing instruction 98-60068-00 available from CTE partnerThe refrigerant circuit is ready for unbrazingoperation.Perform unbrazing operation under nitrogen.Unit connectionEvaporator connection