User manual

Page 47
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
The air conditioning system can be operated either independently or in con-
junction with the heater, depending upon the mode selected on the cabin com-
fort control panel. During normal operation, when the MODE switch (3) is in
the AUTO position, a thermostat, adjustable by the TEMP knob (5), signals an
electronic controller which turns on the air conditioner until the cabin reaches
the selected temperature. When the MODE switch (3) is in MANUAL position,
the air conditioner may be turned on or off, as desired, by use of the MANU-
AL switch (6). The air conditioner is on when the MANUAL switch (6) is in the
A/C position, and off when the switch is in the heater HTR position. For manual
operation of the air conditioner, the HEATER FUEL switch (2) must be off.
9
10
11
1
2
3
4
5
6
7
8
1: ECS Bypass switch 7: Windshield Wiper selector
2: ECS Mode switch 8: Cabin Air Control lever
3: ECS Hi/Low Bleed selector 9: Windshield Defog switch
4: Cabin Temperature Rheostat selector knob 10: Fuel totalizer
5: Manual Temperature control switch 11: Yoke clickspot
6: Cabin Fan switch
Environmental Controls - Copilot
Environmental Control System (ECS) - Cheyenne IIXL
The environmental control system (ECS) in the Cheyenne IIXL is an electronic con-
trol system for automatic temperature control with provision for manual electri-
cal control to offset failures. A ram-air ventilation system is provided for unpres-