EdgeStar CWB1760FD, Руководство по обслуживанию

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Recharging the Compressor
Before refilling the refrigerant, you must perform the test according to
“TROUBLESHOOTING
GUIDE”. When the defects are found, you must discharge the residual refrigerant (R600a) in the
outdoors. For discharging the refrigerant R600a, break the narrow portion of tube extension by
hand or with a pipe cutter. Leave it for
30min in outside to stabilize the pressure.
Then, check the pressure by piercing the
filter dryer part with piercing pliers. If the
refrigerant is not completely discharged,
let the refrigerator stand for 30 more min
outside.
Attach a service tube installed with a
Schrader valve (one-way valve). Then, connect the Schrader valve (one-way valve) to the pump that
is connected to the discharging hose leading to the outside. When discharging the residual
refrigerant, repeat 3 cycles that includes 3min of the pump running->pump off->30sec of the
compressor running.
After the refrigerant (R600a) is completely discharged, repair any defective parts and replace the
filter dryer. Connect the Schrader valve to pump with the coupler then turn the vacuum pump on.
Let the pump run until the low-pressure gauge indicates the vacuum (gauge pressure 0,
absolute pressure -1atm or -760mmHg). Recommended vacuum time is 30 min. Charge the
N2 gas in order to check for leakage from welding points. If leakages are found, repair the
defects and repeat the vacuum process.
After the system is completely vacuumed, fill it with R600a up to what has been specified on
your unit Rating Label. The amount of refrigerant must be precisely measured within the error of
±2g by an electron scale.
If you use the manifold connected with both the R600a cylinder and the vacuum pump
simultaneously, make sure the pump valve is closed.
Connect the charging hose that is connected to the refrigerant cylinder to the Schrader valve installed
on the service tube. Then, charge the refrigerant by controlling the throttle valve. When you do so,
do not fully open the Throttle valve because it may make damage to the compressor. Gradually
charge the R600a by opening and closing the throttle valve (5g each time). The charging hose
must use a one-way valve to prevent the refrigerant from flowing back. Close the Schrader valve cap
after the refrigerant (R600a) is completely recharged.
After you completely recharge the refrigerant (R600a), perform the leak test by using a portable
leak detector or soap suds. Test the low pressure (suction) parts when compressor is off and high
pressure parts when compressor i s on. If leaks are found, restart from the refrigerant discharging
process and repair any leaks.