10. Shut off air conditioning system and airplane engine. Then, remove the charging lines from the Schrader
valves with care due to the refrigerant remaining in the hose.
— Note —
A shop cloth should be used to divert escaping refrigerant when disconnecting the
charging hose from the Schrader valve. Recap the valve.
PARTIAL CHARGE OF SYSTEM.
To “top off” the air conditioning system with refrigerant, proceed as follows:
1. Remove the access panel at the rear of the cabin.
2. Connect a charging hose to a refrigerant cylinder and also to the Schrader valve fitting on the suction
line. (Refer to Figure 21-30.)
3. Purge the charging hose by allowing a small amount of refrigerant gas to escape at the Schrader valve
fitting.
4. Start the engine and operate at 1000 RPM and turn the air conditioner on maximum cool.
5. Remove the plastic plug from the sight glass in the top of the receiver-dehydrator.
6. With a low refrigerant charge in the system, bubbles will be seen passing thru the sight glass when the
system is operating.
7. Open the valve on the refrigerant cylinder.
8. Allow refrigerant to flow into the system until the bubbles disappear from the sight glass.
9. Close the refrigerant valve and check to see that the sight glass remains clear during the system
operation.
10. When the sight glass stays clear of bubbles, add an additional 1/4 pound of refrigerant to the system.
(Engine should be operating at 1000 RPM.)
— Note —
This should be done with OAT at 70°F, or higher, with the air conditioner operating.
11. Shut off the air conditioner and engine. Remove the charging hose from the Schrader valve with care due
to refrigerant remaining in the line.
12. Replace access panels.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 5 2 - 1 0
Page 21-67
Revised: May 15, 1989
1H10
PIPER AIRCRAFT
Содержание SEMINOLE PA-44-180
Страница 18: ...CHAPTER AIRWORTHINESS LIMITATIONS PA 44 180 180T AIRPLANE MAINTENANCE MANUAL 1A18 PIPER AIRCRAFT...
Страница 21: ...CHAPTER TIME LIMITS MAINTENANCE CHECKS PA 44 180 180T AIRPLANE MAINTENANCE MANUAL 1A21 PIPER AIRCRAFT...
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Страница 38: ...CHAPTER DIMENSIONS AND AREAS 1B14...
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Страница 49: ...CHAPTER LIFTING AND SHORING 1C1...
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Страница 53: ...CHAPTER LEVELING AND WEIGHING 1C5...
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Страница 58: ...CHAPTER TOWING AND TAXIING 1C10...
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Страница 62: ...CHAPTER PARKING AND MOORING 1C14...
Страница 65: ...CHAPTER REQUIRED PLACARDS 1C17...
Страница 70: ...CHAPTER SERVICING 1C22...
Страница 98: ...CHAPTER STANDARD PRACTICES AIRFRAME 1E2...
Страница 108: ...CHAPTER ENVIRONMENTAL SYSTEM 1E12...
Страница 189: ...CHAPTER AUTOFLIGHT 1H21...
Страница 192: ...CHAPTER COMMUNICATIONS 1H24...
Страница 202: ...CHAPTER ELECTRICAL POWER 1I10...
Страница 228: ...CHAPTER EQUIPMENT FURNISHINGS 1J12...
Страница 233: ...CHAPTER FIRE PROTECTION 1J17...
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Страница 238: ...CHAPTER FLIGHT CONTROLS 1J24...
Страница 304: ...2A18 CHAPTER FUEL...
Страница 325: ...2B17 CHAPTER HYDRAULIC POWER...
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Страница 357: ...2D1 CHAPTER ICE AND RAIN PROTECTION...
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Страница 414: ...CHAPTER LANDING GEAR 2F13...
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Страница 479: ...2I6 CHAPTER LIGHTS...
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Страница 488: ...2I16 CHAPTER NAVIGATION AND PITOT STATIC...
Страница 503: ...2J7 CHAPTER OXYGEN...
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Страница 524: ...2K6 CHAPTER VACUUM...
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Страница 535: ...2K19 CHAPTER ELECTRICAL ELECTRONIC PANELS AND MULTIPURPOSE PARTS...
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Страница 547: ...2L7 CHAPTER STRUCTURES...
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Страница 582: ...CHAPTER DOORS 3A18...
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Страница 593: ...CHAPTER STABILIZERS 3B8...
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Страница 604: ...CHAPTER WINDOWS 3B22...
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Страница 611: ...CHAPTER WINGS 3C10...
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Страница 624: ...CHAPTER PROPELLER 3D1...
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Страница 643: ...CHAPTER POWER PLANT 3D21...
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Страница 667: ...CHAPTER ENGINE FUEL SYSTEM 3F1...
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Страница 681: ...CHAPTER IGNITION 3F16...
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Страница 712: ...CHAPTER ENGINE INDICATING 3H1...
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Страница 730: ...CHAPTER EXHAUST 3H19...
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Страница 734: ...CHAPTER OIL 3I1...
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Страница 743: ...CHAPTER STARTING 3I11...
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Страница 755: ...CHAPTER TURBINES 3J1...
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Страница 787: ...CHAPTER CHARTS AND WIRING DIAGRAMS 4A18...
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