Note On Adding Refrigerant - Mirage IVEH121A Owner's Manual

3. Open the low Pressure side of the manifold
gauge. Keep the High Pressure side closed.
4. Turn on the vacuum pump to evacuate the
system.
5. Run the vacuum for at least 15 minutes, or
until the Compound Meter reads -76cmHG
(-105Pa).
6. Close the Low Pressure side of the manifold
gauge, and turn off the vacuum pump.
7. Wait for 5 minutes, then check that there has
been no change in system pressure.
8. If there is a change in system pressure, refer to
Gas Leak Check section for information on how
to check for leaks. If there is no change in sys-
tem pressure, unscrew the cap from the packed
valve (high pressure valve).
9. Insert hexagonal wrench into the packed valve
(high pressure valve) and open the valve by turn-
ing the the wrench in a 1/4 counterclockwise turn.
Listen for gas to exit the system, then close the
valve after 5 seconds.
10. Watch the Pressure Gauge for one minute to
make sure that there is no change in pressure.
The pressure Gauge should read slightly higher
than atmospheric pressure.

Note on Adding Refrigerant

Some systems require additional charging depending on pipe lenghts.
The additional refrigerant to be charged can be calculated using the following formula:
7.5m
7.5m
CAUTION
DO NOT mix refrigerant types.
11. Remove the charge hose from the service
port.
12. Using hexagonal wrench, fully open both the
high pressure and low pressure valves.
13. Tighten valve caps on all three valves (ser-
vice port, high pressure, low pressure) by hand.
You may tighten it further using a torque wrench if
needed.
OPEN VALVE STEM GENTLY
When opening valve stems, turn the hexagonal
wrench until it hits againts the stopper. Do not try
to force the valve to open further.
(Pipe lenght - 7.5m)
(Pipe lenght - 7.5m)
(Pipe lenght - 7.5m)
(Pipe lenght - 7.5m)
(Pipe lenght - 7.5m)
(Pipe lenght - 7.5m)
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