TB20 MAINTENANCE MANUAL 21 AIR CONDITIONING TB20飞机维护手册 21 空调(7)

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The fan is secured to a support secured to the firewall, on cabin side.
An S129 thermostatic contact starts the fan as soon as the temperature reaches 113°F (45°C).
The fan is electrically supplied by "BUS 3" bar and protected by a circuit breaker located in PL1 circuit breaker panel.
E. B17 cabin blower (option) (Figures 1, 3 and 3A)
A blower, secured to the rear face of frame C6 and tapping outside air at the root of the vertical stabilizer, accelerates the cool air flow to the rear passengers. The blower ON/OFF switch is located on the overhead panel, forward of the air outlets.
The blower is electrically supplied by "BUS 2" bar and protected by "CB111" circuit breaker located in PL1 circuit breaker panel.
 
1 - Radio ventilation
2 - L.H. front air outlet
3 - L.H. NACA air intake
4 - Front air intake
5 - B13 radio fan (option)
6 - R.H. NACA air intake
7 - R.H. front air outlet
8 - Rear air outlets
9 - B17 cabin blower (option)
10 - Rear air intake
 

 
 
Distribution - Description and operation
Figure 1
AEAA
Validity : S / N 1 - 584 21 20-00Page 3
(EA) AUG 01
 

  1 - Radio ventilation
2 - R.H. NACA air intake
3 - Front air outlets
4 - L.H. NACA air intake
 

  1 - Radio ventilation
2 - R.H. NACA air intake
3 - Front air outlets
4 - L.H. NACA air intake
5 - NACA air intake control

2
 
Distribution - Air intakes, front air outlets and radio ventilation
Figure 2A - S / N 379. 391. 406 - 584
 
Distribution - B17 cabin blower (option)
Figure 3 - S / N 1 - 399 480 - 584
 
Distribution - B17 cabin blower (option)
Figure 3A - S / N 400 - 479
AEAA
Validity : S / N 1 - 584 21 20 00 (EA) Page 7
AUG 01
 
PAGE INTENTIONALLY LEFT BLANK
 
DISTRIBUTION
DESCRIPTION AND OPERATION
1. GENERAL
The distribution system allows intake and distribution of the air tapped from the atmosphere. The system consists of :
- the air intakes,
- the distribution hoses and air outlets,
- the radio ventilation,
Option pre-MOD. 151. Standard post-MOD. 151
- the B13 radio fan,
All
- the B17 cabin blower (option).
It also uses the control box - refer to 21-40-00.
2. LOCATION
COMPONENT QTY AREA ACCESS DOOR REFERENCE
Air intakes 5 13 0/ 210/
310 / 21-20-00
Distribution hoses and air outlets / 100 / 200 131 / 211L/ 211R 21-20-00
Radio ventilation 1 250 211L 21-20-00
B13 radio fan 1 250 211L/251L 21-20-00
B17 cabin blower (option) 1 220 242 21-20-00
　
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