ENVIROMENTAL SYSTEM Flashcards
1
Q
Janitorial combustion heater
A
- in nose compartment
- controlled using three-position switch
- fuel from left fuel tank 1/2 gallon per hour
- fuel pump, pumps fuel from left tank
2
Q
How does the janitorial combustion heater operate?
A
- draws in outside air
- uses a spark plug and fuel to create “high velocity whirling flame”
- heat from flame will heat air moving around the shroud
- heat should be felt right away
- like a house heater maintains the proper temperature setting
3
Q
How to operate heater properly?
A
- AIR INTAKE partially or fully open
- HEATER ON
- three position switch set to CABIN HEAT
- DEFROST OPEN position
4
Q
Overhead vents
A
- ram air through vents on outside
- air blower
- moves air into overhead vents
5
Q
Heat on ground
A
- no ram air
- blower will blow air from outside into heater while on ground
- blower shuts off when up-limit switch is depressed on nose wheel (gear up)
- FAN switch for fresh air on ground
6
Q
Safety switches
A
- prevents both fan & heater operations when air intake lever is CLOSED
- LDG gear retracted micro switch turns off blower
7
Q
Overheat switch
A
- acts as a safety feature to shut off heater during a malfunction
- HTR OVRHEAT CAS
- HTR OVER TEMP illuminates, can only be reset on the ground by maintenance
8
Q
Turning off the heater in the air
A
- heat switch off
- air intake open 15 seconds
9
Q
Turning off heater on the ground
A
- heater switch to fan position for 2 minutes
- allows heater to cool down
10
Q
Fresh air (unheated)
A
- air intake open & heater off
