Mini Tec A Kit - Manual (Page 8)

Evacuating the System:
Note: Evacuation and charging should only be performed by a Certified Air
Conditioning Technician.
Step 1: Evacuate the system for 15 minutes. A reading of 28 in. mercury at sea level
pressure should be obtained on low side of gauge. If this reading is not obtained, make
sure that all fittings are tight and retry.
Step 2: Close both charging manifold gauges for 5 minutes. Check the low side
reading before closing. If reading shows a rise in pressure after closing the gauges,
check for leaks.
a. To check for leaks with a leak detector, disconnect the vacuum pump and add a
small amount of refrigerant to the system. A pressure of 5 P.S.I. should be noted
on low side gauge.
b. Go over all connections, lines, and hoses with a leak detector to insure no leaks
are found.