Section 22: HEATING AND AIR CONDITIONING
PA1553
14
5. The success of the air conditioning system
depends on retaining the conditioned air
within the vehicle. All windows and intake
vents should be closed. An opening of
approximately 8 in
2
(5162 mm
2
) could easily
neutralize the total capacity of the system.
6. Other causes of inadequate cooling are
dirty coils or filter. Dirt acts as insulation and
is also serves as a restriction to the air flow.
7. The refrigeration load is not constant and
varies. It is also affected by outside
temperature, relative humidity, passenger
load, compressor speed, the number of
stops, etc.
8. The compressor will load or unload
depending on operating conditions.
8.2 REFRIGERANT
The A/C system of this vehicle has been
designed to use Refrigerant 134a as a medium.
Regardless of the brand, only R-134a must be
used in this system. The chemical name for this
refrigerant is Ethane, 1, 1, 1, 2-Tetrafluoro.
DANGER
Refrigerant in itself is nonflammable, but if it
comes in contact with an open flame, it will
decompose.
8.2.1 Procurement
Refrigerant is shipped and stored in metal
cylinders. It is serviced in 30 and 100 pound
(13,6 and 45 kg) cylinders. Approximately 24
pounds (10,9 kg) are used in the system.
It will be impossible to draw the entire refrigerant
out of the cylinder. However, the use of warm
water when charging the system will assure the
extraction of a maximum amount of refrigerant
from the cylinder.
8.2.2 Precautions in Handling Refrigerant
1. Do not leave refrigerant cylinder uncapped.
2. Do not subject cylinder to high temperatures,
do not weld or steam clean near system or
cylinder.
3. Do not fill cylinder completely.
4. Do not discharge vapor into an area where
a flame is exposed.
5. Do not expose the eyes to liquid refrigerant.
WARNING
One of the most important precautions when
handling refrigerant consists in protecting the
eyes. Any liquid refrigerant which may
accidentally escape is approximately -40
o
F (-
40
o
C). If refrigerant comes in contact with the
eyes, serious injury could result. Always wear
goggles to protect the eyes when opening
refrigerant connections.
All refrigerant cylinders are shipped with a heavy
metal screw cap. The purpose of the cap is to
protect the valve and safety plug from damage.
It is a good practice to replace the cap after
each use of the cylinder for the same reason. If
the cylinder is exposed to the sun’s radiant heat
pressure increase resulting may cause release
of the safety plug or the cylinder may burst.
For the same reason, the refrigerant cylinder
should never be subjected to excessive
temperature when charging a system. The
refrigerant cylinder should be heated for
charging purposes by placing it in 125
o
F (52
o
C)
water. Never heat above 125
o
F (52
o
C) or use a
blowtorch, radiator, or stove to heat the cylinder.
Welding or steam cleaning on or near any
refrigerant line or components of the A/C system
could build up dangerous and damaging
pressures in the system.
If a small cylinder is ever filled from a large one,
never fill the cylinder completely. Space should
always be allowed above the liquid for
expansion. Weighing cylinders before and
during the transfer will determine the fullness of
the cylinders.
8.2.3 Treatment in Case of Injury
If liquid refrigerant comes in contact with the
skin, treat the injury as if the skin was frost-bitten
or frozen. If liquid refrigerant comes in contact
with the eyes, consult an eye specialist or doctor
immediately. Give the following first aid
treatment:
1. Do not rub the eyes. Splash eyes with cold
water to gradually bring the temperature
above the freezing point.
2. Apply drops of sterile mineral oil (obtainable
at any drugstore) in the eyes to reduce the
Summary of Contents for LE MIRAGE XLII
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1553 ...
Page 2: ......
Page 12: ...Section 00 GENERAL INFORMATION 10 PA1553 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005 ...
Page 13: ...Section 00 GENERAL INFORMATION PA1553 11 FIGURE 14 CONVERSION CHART 00006 ...
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Page 140: ...section01f tif 1700x2164x2tiff 10 ...
Page 141: ...section01f tif 1700x2164x2tiff 11 ...
Page 142: ...section01f tif 1700x2164x2tiff 12 ...
Page 143: ...The ONLY Motor Coach Power Choice ...
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Page 185: ...Section 04 EXHAUST SYSTEM PA1553 3 FIGURE 2 EXHAUST SYSTEM INSTALLATION W5 04013 ...
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Page 345: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12 ...
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Page 492: ...Section 12 BRAKE AND AIR SYSTEM PA1553 20 FIGURE 38 AIR OPERATED BRAKING SYSTEM W0 WE ...
Page 493: ...Section 12 BRAKE AND AIR SYSTEM PA1553 21 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5 ...
Page 500: ...Section 12 BRAKE AND AIR SYSTEM PA1553 28 FIGURE 46 ABS 4S 4M CONFIGURATION ...
Page 528: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA ...
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Page 1004: ...PROCEDURE NO PR00044 REVISION 00 Page 2 of 2 Slide out ...
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Page 1165: ...Section 22 HEATING AND AIR CONDITIONING PA1553 19 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP ...
Page 1201: ...Section 22 HEATING AND AIR CONDITIONING PA1553 55 FIGURE 64 HEATER LINE SHUTOFF VALVES WE W0 ...
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Page 1209: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R ...
Page 1210: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT ...
Page 1233: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R ...
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Page 1305: ...Section 26 XLII SLIDE OUT PA1553 11 ...
Page 1306: ...Section 26 XLII SLIDE OUT PA1553 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION ...