User manual

Page 46
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
Environmental Controls - Copilot
Environmental Controls - Cheyenne I, IA and II
9
10
11
1
2
3
4
5
6
7
8
1: Windshield Wiper control knob 7: Dehumider Control switch
2: Heater Fuel Flow control switch 8: Oxygen Supply Pressure gauge
3: Environmental Control MODE switch 9: Fuel totalizer
4: Environmental Control MASTER switch 10: Defroster
5: Cabin Temperature control knob 11: Yoke clickspot
6: Manual Mode switch
The cabin comfort control panel contains all the controls needed to operate the
heating, cooling and dehumidication system. The MASTER switch (4) controls
the heater, air conditioner and cabin recirculating air blower. The MODE switch
(3) is normally used in the AUTO position, and the operator only needs to select
the proper temperature level with the knob marked TEMP (5). The MODE switch
(3) MANUAL position is for standby use in case of a malfunction of the automatic
mode only. When the MODE switch (3) is in MANUAL position, the heater may be
turned on or off as desired. For manual operation, the MANUAL switch (6) should
be placed in heater HTR position, and the heater turned on or off by use of the
HEATER FUEL (2) switch.
The DEHUMIDER switch (7) provides means to decrease humidity when the MODE
switch (3) is in the automatic position. The HEATER FUEL toggle switch (2) controls the
ow of fuel to the heater fuel pump. It must be turned on for heater operation.