Lennox EMEA FRIGA-BOHN eCO2Boost XS 1, Руководство по установке

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eCO2Boost XS 2
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9.2. CDU connection to the evaporators
9.1. Piping and vacuuming process
1. Brazing connection pipe
1-1. Check that cabinet EEV is completely opened.
1-2. Before brazing, insert 2bar nitrogen gas flow into pipe for preventing
deposition of any oxide film on the inner surface of the piping, and also
avoid heating up service valve by wet towel cover etc.
1-3. During brazing, be careful for burning insulation & any CDU
components.
2. Leakage test
2-1. Power supply on CDU & wait 20 sec for initializing system.
2-2. Charge Nitrogen gas in 80bar or 55bar if using 60bar relief valve.
2-3. Check brazed part using leakage detector or leakage test liquid.
(formability)
3. Vacuuming
3-1. Set R744(CO
₂
) manifold, vacuuming pump, CO
₂
vessel, and CDU
service port.
3-2. Connect CO
₂
charge tube, vacuuming tube, and each equipment.
3-3. Check connector and each tube are closed tightly.
3-3. Loose service valve rod in middle position (3 way opening) before
vacuuming.
3-4. Vacuuming for 2-3 hours inside pressure keeping -1bar (vacuuming
status)
4. Setting parameter value
4-1. Change loop parameter set depending on target evaporating
temperature during vacuuming process. (suction pressure default value
3,0MPa)
1. Remove process pipe
2. Insert pipe
3. Brazing pipe