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Recommended Operating Procedure
1. Tighten the high- and low-pressure handles and then connect the manifold's high- and
low-pressure hoses to the ports of the AC/R system, respectively.
2. Connect the charging hose (yellow) to the vacuum pump and then connect the hose to the
hose fitting for evacuation.
3. Loosen the high- and low-pressure handles.
4. Activate the vacuum pump to evacuate the system for a required period of time.
5. Tighten the high- and low-pressure handles and then turn off the vacuum pump. Check
the gauge pressure at this time. After a few minutes, check the gauge pressure again. If
the gauge pressure has not increased at all, there is no leakage in the system.
6. Disconnect the charging hose from the pump and then connect the charging hose to the
charging scale.
7. Carry out charging by means of the charging scale. At this time, do not loosen the
manifold's handles.
8. Open the high-pressure valve to charge refrigerant. (If the system is equipped with a
low-pressure port only, use the port for both refrigerant charging and evacuation.)
9. If the low-pressure port is to be used, close the high-pressure valve and open the
low-pressure valve slightly for gas-phase refrigerant charging.
10. Check if each one of the gauges properly points the pressure values recommended by
the system manufacturer's manual.
Safety Instructions
1. Since this manifold is to be used exclusively for HFC refrigerants, never charge any
other type of gas and never use it for any other purpose than recommended in this
instruction manual.
2. Wear protective clothing, a helmet, protective glasses, gloves, safety shoes when
handling refrigerants to avoid contact with refrigerants, which could possibly blind
and injure the operator.
3. Do not forget to check if the charging hose is equipped with a hose gasket. Be very
careful not to get frozen by refrigerants.
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