MANUALS · HEATER, AIR CONDITIONER AND VENTILATION [55] · страница 87 из 118 · Открыть оригинал PDF ↗

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Low

Charge

If the system has not lost all of its refrigerant charge; locate
and repair all leaks. If it is necessary to increase the system
pressuretofindtheleak(becauseofanespeciallylow
charge) ,add refrigerantIf it is possibleto repair the leak
use
without discharging the refrigerant system,the proce-
dure for correcting low refrigerant level:

HANDLING TUBING AND FITTINGS

ESSFVAD

Kinksintherefrigeranttubingorsharpbendsinthe
refrigerant hose lines will greatly reduce the capacity of the
entire system: High pressuresare produced in the system
whenit isoperatingExtremecaremust be exercised to
make surethat all connections are pressure tight:Dirt and
moisture can enter the system when it is opened for repair
OrreplacementoflinesOrcomponents:Thefollowing
precautionsmust beobserved.Thesystemmust be com-
pletely discharged before opening any fitting of connection in
therefrigeration systemOpenfittingswithcautioneven
afterthe systemhasbeendischarged:any pressure is
noticed asfitting is loosened,allow trapped pressure to
bleed offveryslowly.
Never attempt to rebend formed lines to fit. Use the correct line
for the installation you are servicinggood rule for the flexible
hose lines is keep the radius of all bends at least10 times the
diameter of the hose. Sharper bends will reduce the flow of
refrigerant: The flexible hose lines should be routed so that thev
are at least 80 mm (3 in ) from the exhaust manifold. It is good
practice to inspect all flexible hose lines at least once a year to
make sure they are in good condition and properly routed.0-
ringused on connections are not reusable:

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