Section 22: HEATING AND AIR CONDITIONING
PA1564
10
NOTE
When starting the A/C compressor wait 5
seconds before checking pressures in order to
give the system a chance to build its pressure.
During the first 5 seconds after startup, the
compressor is active on 6 cylinders and the
A/C valve is open regardless of the pressure
readings.
In test mode, with the parking brake applied and
the passenger set point set to a value higher
than 64°F (18°C), the hot water circulating pump
is not set to OFF as it would normally do when
the outside temperature gets above 50°F
(10°C). This feature allows verification of the
pump when inside a garage. This is also useful
when working on the heating system to remove
air pockets trapped in the system.
When performing an A/C cooling test and having
the water pump shut off in switch/sensor test
mode is required, just set the passenger set
point temperature to the minimum 64°F (18°C)
to shut off the pump.
7.2
HVAC SYSTEM AND TEST MODE FOR
ELECTRIC MOTORS
The test mode allows testing the motors and
electric contactors without the need to have the
engine running (see Section 06: ELECTRICAL
under "TEST MODE FOR ELECTRICAL
MOTORS" for complete information).
Use this test mode for testing of the condenser
motors, the A/C compressor clutch activation,
left and right unloaders, evaporator motor, water
pump, and hot water solenoid valve.
7.3 PARTICULARITIES
Conditions for engaging the
2
nd
speed on the evaporator
motor (cooling demand).
The 2
nd
speed engages if the cabin area air temperature is 1 degree
above the set point and it revert to speed 1 if the temperature gets
equal or below the set point.
Conditions for hot water
recirculating pump activation
(heating demand).
The pump turns to OFF if the outside temperature is above 50°F
(10°C), when there is less demand for heating.
Note: To test a working pump, it is possible to keep it active even if
the outside temperature is above 50°F (10°C). See paragraph 7.2
HVAC SYSTEM AND TEST MODE FOR ELECTRIC MOTORS.
The compressor unloaders are
working based on pressure
and also on the difference
between the cabin area air
temperature and the set point.
2 left compressor cylinders:
Stop if: Cabin area air temperature is at less than 0.4°C degree above
the set point or if the compressor output is above 280 psi, or if the
compressor input is below 26 psi.
Restart if: Cabin area air temperature is 0.9°C or more above the set
point and the compressor pressure output is less than 220 psi and the
compressor pressure input is above 34 psi.
2 right compressor cylinders:
Stop if: Cabin area air temperature is at less than 0.2°C above the set
point or if the compressor input falls below 23 psi.
Restart if: Cabin area air temperature is 0.7°C or more above the set
point and the compressor input pressure is above 32 psi.
The A/C deactivation pressure
is 320 psi.
In case of high pressure, the analog pressure sensor connected to
the Multiplex module deactivates the compressor.
There is also a « Pressure switch » adjusted to 350 PSI that acts to
stop the compressor in the instance that the Multiplex module fails.
Summary of Contents for LE MIRAGE XLII BUS SHELLS
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1564 1ST EDITION...
Page 12: ...Section 00 GENERAL INFORMATION 10 PA1564 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005...
Page 13: ...Section 00 GENERAL INFORMATION PA1564 11 FIGURE 14 CONVERSION CHART 00006...
Page 14: ......
Page 30: ......
Page 63: ...SECTION 01 ENGINE PA1564 33 FIGURE 13 POWER PLANT CRADLE INSTALLATION 01140...
Page 108: ......
Page 160: ......
Page 210: ......
Page 229: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12...
Page 254: ......
Page 281: ......
Page 282: ......
Page 283: ......
Page 284: ......
Page 285: ......
Page 286: ......
Page 287: ......
Page 288: ......
Page 289: ......
Page 290: ......
Page 291: ......
Page 292: ......
Page 309: ......
Page 379: ...Section 12 BRAKE AND AIR SYSTEM PA1564 21 FIGURE 38 AIR OPERATED BRAKING SYSTEM WE...
Page 380: ...Section 12 BRAKE AND AIR SYSTEM PA1564 22 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5...
Page 387: ...Section 12 BRAKE AND AIR SYSTEM PA1564 29 FIGURE 46 ABS 6S 5M CONFIGURATION...
Page 418: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA...
Page 422: ......
Page 430: ......
Page 438: ......
Page 445: ......
Page 458: ......
Page 534: ......
Page 540: ......
Page 543: ......
Page 660: ......
Page 661: ......
Page 662: ......
Page 663: ......
Page 664: ......
Page 665: ......
Page 666: ......
Page 667: ......
Page 668: ......
Page 669: ......
Page 670: ......
Page 671: ......
Page 672: ......
Page 673: ......
Page 674: ......
Page 675: ......
Page 676: ......
Page 677: ......
Page 678: ......
Page 679: ......
Page 680: ......
Page 681: ......
Page 682: ......
Page 683: ......
Page 684: ......
Page 685: ......
Page 686: ......
Page 687: ......
Page 688: ......
Page 689: ......
Page 690: ......
Page 691: ......
Page 692: ......
Page 693: ......
Page 694: ......
Page 695: ......
Page 696: ......
Page 697: ......
Page 698: ......
Page 699: ......
Page 700: ......
Page 701: ......
Page 702: ......
Page 703: ......
Page 704: ......
Page 705: ......
Page 706: ......
Page 707: ......
Page 708: ......
Page 709: ......
Page 710: ......
Page 711: ......
Page 712: ......
Page 713: ......
Page 714: ......
Page 715: ......
Page 716: ......
Page 717: ......
Page 718: ......
Page 719: ......
Page 720: ......
Page 721: ......
Page 722: ......
Page 723: ......
Page 724: ......
Page 725: ......
Page 726: ......
Page 727: ......
Page 728: ......
Page 729: ......
Page 730: ......
Page 731: ......
Page 732: ......
Page 733: ......
Page 734: ......
Page 735: ......
Page 736: ......
Page 737: ......
Page 738: ......
Page 739: ......
Page 740: ......
Page 741: ......
Page 742: ......
Page 743: ......
Page 744: ......
Page 745: ......
Page 746: ......
Page 747: ......
Page 748: ......
Page 749: ......
Page 750: ......
Page 751: ......
Page 752: ......
Page 753: ......
Page 754: ......
Page 755: ......
Page 756: ......
Page 757: ......
Page 758: ......
Page 759: ......
Page 760: ......
Page 798: ......
Page 886: ......
Page 900: ......
Page 902: ......
Page 904: ......
Page 910: ......
Page 916: ......
Page 920: ......
Page 924: ......
Page 926: ...PROCEDURE NO SAV00044 REVISION 00 Page 2 of 2 Slide out...
Page 930: ......
Page 932: ......
Page 934: ......
Page 940: ......
Page 944: ......
Page 946: ......
Page 954: ......
Page 976: ......
Page 988: ......
Page 992: ......
Page 996: ......
Page 1032: ......
Page 1038: ......
Page 1044: ......
Page 1064: ......
Page 1086: ...Section 22 HEATING AND AIR CONDITIONING PA1564 18 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP...
Page 1118: ...Section 22 HEATING AND AIR CONDITIONING PA1564 50 FIGURE 54 HEATER LINE SHUTOFF VALVES WE...
Page 1124: ......
Page 1125: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R...
Page 1126: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
Page 1149: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R...
Page 1177: ......
Page 1178: ......
Page 1179: ...1...
Page 1180: ...2...
Page 1181: ...3...
Page 1182: ...4...
Page 1183: ...5...
Page 1184: ...6...
Page 1185: ...7...
Page 1186: ...8...
Page 1187: ...9...
Page 1188: ......
Page 1212: ......
Page 1223: ...Section 26 XLII SLIDE OUT PA1564 11...
Page 1224: ...Section 26 XLII SLIDE OUT PA1564 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION...