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Multi F Outdoor Condenser Installation Manual

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Final Installation Procedures
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MULTI
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MAX
MULTI
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Triple Evacuation Procedure Steps
1. If this procedure is performed shortly after the leak / pressure test, the cap and core on the liquid and gas (vapor) suction Schrader ports
must have already been removed, and the manifold must already be connected. If the procedure was not performed shortly after the leak
/ pressure test, make sure to remove the cap and core on the liquid and gas (vapor) suction Schrader ports. Verify that the service valves
on the outdoor unit are closed, and the stem head access caps are tight.
2. Connect the gauge manifold along with the vacuum pump to the liquid and gas (vapor) suction Schrader ports (with core removed) using a
vacuum hose. Open the gauge manifold and the vacuum pump valves.
• After the vacuum pump is first operated, if hoses, manifold, and vacuum valves are leak free (and oil is not moisture laden), the gauge must
read <100 microns within one (1) minute.
• Do not proceed if the gauge does not read <100 microns within one (1) minute. There is a leak in the hose, gauge manifold, or vacuum
valve, and the equipment must be replaced.
3. Operate the vacuum pump and evacuate the system to the 2,000 micron level. Isolate the pump by closing the manifold gauges and the
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• If the micron level DOES NOT stop rising, there is a leak, and the leak test must be performed again.
• If the micron level DOES rise above 2,000 micron, re-open the manifold gauges and the vacuum pump valve and continue evacuation back
down to 2,000 micron level.
• If the micron level holds at 2,000 micron, continue to step 4.
4. Break vacuum with 50 psig nitrogen purge for an appropriate amount of time (this is to “sweep” moisture from piping).
5. Purge nitrogen from the system until the pressure drops down to 1 to 3 psig.
6. Evacuate to 1,000 micron level. Isolate the pump by closing the manifold gauges and the vacuum pump valve, and then watch the micron
level. Micron level will rise a bit, but MUST eventually stop rising for fifteen (15) minutes.
• If the micron level DOES NOT stop rising, there is a leak, and the leak test must be performed again.
• If the micron level DOES rise above 1,000 micron, re-open the manifold gauges and the vacuum pump valve, and continue evacuation back
down to 1,000 micron level.
• If the micron level holds at 1,000 micron, continue to step 7.
7. Break vacuum with 50 psig nitrogen purge for an appropriate amount of time.
8. Purge nitrogen from the system until the pressure drops down to 1 to 3 psig.
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be necessary to repeat the steps of vacuum break and drying.
11. After maintaining the system in vacuum for one (1) hour, check if the vacuum gauge rises or not. If it doesn’t rise, then the system is
properly evacuated.
12. Close manifold gauges.
13. Shut the valves before turning off and disconnecting the vacuum pump.
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FINAL INSTALLATION PROCEDURES