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Vacuum and refrigerant leak
NOTICE
Do not purge air with refrigerant. Use a vacuum pump to purge the unit. No additional refrigerant
exists in the outdoor unit to purge the air!
Vacuum action
1. Remove caps from the liquid valve, the gas valve, and from the service port.
2. Connect the hose, from the low pressure side of the manifold, to the service port of the unit's
gas valve. Both gas and liquid valves must be kept closed to prevent any possible refrigerant
leaks.
3. Connect the hose used for the pulldown, to the vacuum pump.
4. Continue with the purge until the gauge reaches a value not to exceed 350 microns; close the
valve going towards the vacuum pump. Important: Do not open the service valves until the
purge procedure has terminated and leak verification has been performed on the refrigerant
lines and on the indoor coil.
5. Observe the vacuum gauge. Pulldown will be complete if the micron gauge does not rise above
500 microns in one (1) minute lapse.
6. Once the vacuum has ended, close the vacuum pump and the micro gauge and close all
manifold valves.
7. Open the liquid valve slightly, in such a way, as to allow the flow of a small amount of
refrigerant towards the connection in order to balance the pressure inside and outside of said
piping, and thus avoiding the entry of air into the piping connection when removing the hose.
8. Place the caps back on the liquid valve, the gas valve, and the service port.
Leak detection
1. Using a leak detector, verify the presence of any leaks at all connection points.
2. If you do not have a detector at hand, use soapy water. Apply the soapy water on each joint
and wait a few minutes. If bubbles appear, it will indicate a leak which must be immediately
repaired.
Múltiple c/manómetros
Manómetro (baja presión)
Interr. (baja presión)
Tubo conexión (unidad int.)
Válvula líquido
Válvula gas
Puerto servicio
Tapa
Manguera
Bomba vacío
Manómetro (alta presión)
Interr. (alta pr)
Tubo conex.
Tapa
Tubo servicio
Tapa
Manguera con aguja de válvula
Manómetro baja presión
Manómetro alta presión
Pto. servicio
Bomba vacío
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Wall Unit
Содержание 4MXW1609A1
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