1. Initial Pilot Ground School
EC 130 B4
Initial Pilot Ground School
Chapter 13
Heating, Demisting and
Air Conditioning

2. Chapter 13 - Heating, Demisting, and Air Conditioning
Heating System …………………………………………………………...… 13.3
Heating and Demisting Outlets ……….…………………………......…… 13.4
Heating and Demisting Control Knobs …………………………………
Air Conditioning System …………………………………..………………. 13.7
Review Questions …………………………………………………………
13.2

3. Venturi Throat on Heating Injector
Heating System
Heating Controls
P2 / Ambient Air Mixer
Venturi Throat on Heating Injector
13.3

4. Heat and Demisting Outlets
Heat outlets are under the front seats
Demisting outlets are across the front windshields
13.4

5. Convergent Injectors Hot Air Outlets Windshield Demisting Diffusers
Hot air tapped at the engine centrifugal compressor outlet (P2), is mixed with ambient air drawn
in by 2 convergent injectors.
Hot air is diffused into the cabin through 3 hot air outlets and the windshield demisting diffusers.
Hot Air
Outlets
Windshield
Demisting
Diffusers
Use of P2 air bleeds is forbidden above the engine maximum continuous rating (Ng or T4).
13.5

6. Heating and Demisting Control Knobs
These are located on the floor between the pilot and co-pilot seat. Caution should be exercised when turning these knobs “OFF”. They should be turned
off ‘loosely’, otherwise they will be very difficult to open the next time you want heating or demisting.
13.6

7. Overhead Air Conditioning Controls
Pre - Mod Post - Mod
13.7

8. Condenser and Fan
Core
Fan
Dryer
13.8

9. Exhaust Ducting
13.9

10. Condenser Air Inlet Filtration System
Air Flow
13.10

11. Air Conditioning Components
13.11

12. Evaporator
13.12

13. Compressor
13.13

14. Front Evaporator Removed
13.14

15. Review Questions
13.15

16. 110. What are the heating and demisting functions controlled by?
C. Rotary knobs on the floor.

17. 111. Where, on the floor, are the heating and demisting rotary control knobs located?
B. Between the pilot and co-pilot seats.

18. 112. What important consideration should be remembered when turning off the heat or demisting rotary knob?
C. Turn them off loosely. If turned off
tightly they will be very hard to turn
back on.

19. Initial Pilot Ground School
EC 130 B4
Initial Pilot Ground School
End of Chapter 13
Heating, Demisting and
Air Conditioning