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REFRIGERANT PIPING AND REFRIGERANT CHARGE
13
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13.3.2.
THREE PRINCIPLES ON REFRIGERANT PIPING WORK
In case of the refrigeration cycle with refrigerant R407C,
refrigeration oil should be of synthetic type. Therefore, the
oil absorbs moisture quickly when compared with R22
systems and it will cause sludge and oxidation of the oil.
Due to this reason, pay much careful attention to basic
piping work control to avoid infiltration of moisture or dusts
during refrigerant piping work.
Three Principles
Cause of failure
Presumable Failure
Preventive Action
1. Dry
Keep good dryness
Water Infiltration due to insufficient
protection at pipe ends.
Dewing inside of Pipes
Insufficient Vacuum Pumping Time
Icing Inside Tube at Ex. Valve
(Water Choking)
+
Generation of Hydration and
Oxidation of Oil
ò
Clogged Strainer, etc., Insulation
Failure and Compressor Failure
Pipe Protection
1 Pinching
2 Taping
Flushing
Vacuum Drying
One gram of water turns into gas
(approx. 1000 lrs) at 1 Torr.
Therefore, it takes long time to
vacuum-pump by a small vacuum
pump
2. Clean
No dusts Inside of
Pipes
Infiltration of Dusts, etc. from Tube
Ends
Oxidation Film during Brazing without
Blowing Nitrogen
Insufficient Flushing by Nitrogen after
Brazing
Clogging of Ex. Valve, Capillary
Tube and Filter
■
Oxidation of Oil
■
Compressor Failure
ò
Insufficient Cooling or Heating
Compressor Failure
Pipe Protection
1 Mounting Caps
2 Taping
3 Pinching
Flushing
3. No leakage
No leakage shall
exist
Brazing Failure
Failed Flaring Work and Insufficient
Torque of Squeezing Flare
Insufficient Torque of Squeezing
Flanges
Refrigerant Composition Change,
Refrigerant Shortage
■
Performance Decrease
■
Oxidation of Oil
■
Overheating of Compressor
ò
Insufficient Cooling or Heating
Compressor Failure
Careful Basic Brazing Work
ò
Basic Flaring Work
ò
Basic Flange Connecting Work
ò
Air Tight Test
ò
Holding of Vacuum
$
ATTENTION:
It is recommended to use drier filter for more safety.
The filter will absorb the remaining moisture inside
refrigerant cycle after finish all vacuum process
indicated in this chapter.
Install the field supplied filter drier in the liquid line.
See subchapter 13.5.5 for more details.
ò
ò
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Содержание FSG Series
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Страница 159: ...CONTROL SYSTEM 9 13 9 6 STANDARD OPERATION SEQUENCE 9 6 1 COOLING OPERATION FSG FSG1 I U Indoor Unit O U Outdoor Unit ...
Страница 160: ...9 14 CONTROL SYSTEM n Cooling Operation FSG FSG1 cont ...
Страница 161: ...CONTROL SYSTEM 9 15 9 6 2 COOLING MAINLY COOLING OPERATION FXG FXG1 I U Indoor Unit O U Outdoor Unit ...
Страница 162: ...9 16 CONTROL SYSTEM n Cooling mainly Cooling Operation FXG FXG1 cont ...
Страница 163: ...CONTROL SYSTEM 9 17 9 6 3 DRY OPERATION FSG FSG1 I U Indoor Unit O U Outdoor Unit ...
Страница 164: ...9 18 CONTROL SYSTEM n Dry Operation FSG FSG1 cont ...
Страница 165: ...CONTROL SYSTEM 9 19 9 6 4 DRY OPERATION FXG FXG1 I U Indoor Unit O U Outdoor Unit ...
Страница 166: ...9 20 CONTROL SYSTEM n Dry Operation FXG FXG1 cont ...
Страница 167: ...CONTROL SYSTEM 9 21 9 6 5 HEATING OPERATION FSG FSG1 I U Indoor Unit O U Outdoor Unit ...
Страница 168: ...9 22 CONTROL SYSTEM n Heating Operation FSG FSG1 cont ...
Страница 169: ...CONTROL SYSTEM 9 23 9 6 6 HEATING MAINLY HEATING OPERATION FXG FXG1 I U Indoor Unit O U Outdoor Unit ...
Страница 170: ...9 24 CONTROL SYSTEM n Heating mainly Heating Operation FXG FXG1 cont ...
Страница 171: ...CONTROL SYSTEM 9 25 n Defrosting Operation Control ...
Страница 172: ...9 26 CONTROL SYSTEM 9 7 STANDARD CONTROL FUNCTIONS 9 7 1 FREEZING PROTECTION CONTROL DURING COOLING OR DRY OPERATION ...
Страница 173: ...CONTROL SYSTEM 9 27 9 7 2 GAS BYPASS CONTROL 9 7 3 OVER HEATING PROTECTION CONTROL ...
Страница 176: ...9 30 CONTROL SYSTEM 9 7 6 CONTROL FOR AUTO COOL HEAT OPERATION ...
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Страница 287: ...REFRIGERANT PIPING AND REFRIGERANT CHARGE 13 11 GAS LINE LIQUID LINE E 152S E 162M1 E 202M1 E 242S E 302S ...
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Страница 424: ...TCGB0023 rev 0 04 04 Printed in Spain ...