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− Install the bowden cable lock nut.
6. Install the support block to the top of the
distribution box.
DA20-C1 AMM
Heating and Ventilation
Doc # DA 201-C1
Rev. 0 21-00-00 Page 207
19 Dec 1997
Detail Steps/Work Items Key Items
7. Install the distribution box to the sides of the
center console.
− Install the two screws in the left and right
footwells.
8. Install the outer sheath of the HEAT
DEFROST-FLOOR control bowden cable to
the tab at the control quadrant.
− Install the two nuts.
9. Install the cable wire end of the HEAT
DEFROST-FLOOR control to the lever at the
control quadrant.
− Tighten the screw in the swivel
attachment..
10. Install the outer sheath of HEAT ON-OFF
control bowden cable to the tab at the control
quadrant.
− Install the two nuts.
11. Install the cable wire end of the HEAT ONOFF
control to the lever at the control
quadrant.
− Tighten the screw in the swivel
attachment.
12. Do a test for correct operation of the
DEFROST-FLOOR control valve. If
necessary, adjust the bowden cable.
Refer to the Test/Adjust Ditribution Box
Valve procedure.
13. Install The Heat Control Valve. Refer to the Install The Heat Control Valve
procedure.
14. Install the center console cover to the center
console.
15. Install the TRIM switch to the face plate. Push the TRIM switch into position in the
face plate. Connect the connector below the
face plate.
16. Install the face plate to the center console
cover.
Heating and Ventilation
DA20-C1 AMM
Page 208
29 Apr 2004 21-00-00 Doc # DA 201-C1
Rev. 9
Detail Steps/Work Items Key Items
17. Install the control knobs to these levers at the
center console:
− PARKING BRAKE.
− HEAT control ON OFF.
− HEAT distribution DEFROST FLOOR.
− ALTERNATE AIR.
− FUEL MIXTURE.
18. Do a controls freedom of movement check.
19. Install the ignition harness “B” nuts to the
spark plugs. Tighten the “B” nuts.
Torque to 12.4 Nm (110-120 in lbs)
20. Connect the airplane battery. Refer to Chapter 24-31.
21. Do an operational check of the elevator trim
control system.
22. Do an engine test. Refer to the DA20-C1 Flight Manual.
5. Test/Adjust The Distribution Box Valve
Detail Steps/Work Items Key Items
1. Set the CABIN HEAT control lever in the
cockpit to DEFROST.
There must be ‘bounce’ of about 3mm (0.1in)
between the back of the lever and the cockpit
stop.
WARNING: IF THE ENGINE HAS BEEN RUNNING, TAKE CARE WHEN YOU
TOUCH THE HEAT CONTROL VALVE. THE HEAT CONTROL VALVE
GETS HOT.
2. Remove the heat control valve. Refer to the Remove The Heat Control Valve
procedure.
Note: Only do items 3 thru 7 if you must adjust the distribution valve range of
movement.
DA20-C1 AMM
Heating and Ventilation
Doc # DA 201-C1
Rev. 0 21-00-00 Page 209
19 Dec 1997
Detail Steps/Work Items Key Items
3. Disconnect the airplane battery. Refer to Chapter 24-31.
4. Remove the control knobs from these levers
at the center console:
− PARKING BRAKE.
− HEAT control ON OFF.
− HEAT distribution DEFROST FLOOR.
− ALTERNATE AIR.
− FUEL MIXTURE.
5. Remove the engine controls face plate from
the center console cover.
− Remove the four screws.
6. Disconnect and remove the TRIM switch
from the face plate.
Disconnect the connector below the face
plate. Lever the TRIM switch clear.
7. Remove the center console cover from the
center console:
Remove the six screws from the two sides of
the center console cover.
8. Make sure that:
− The flap fully closes the two openings to
the FLOOR distribution holes.
Look or feel inside the distribution box valve.
9. If necessary, adjust the outer sheath of the
cable that goes through the tab in the control
quadrant to give the correct ‘bounce’.
10. Set the CABIN HEAT control lever in the
cockpit to FLOOR.
There must be ‘bounce’ of about 3mm (0.1in)
between the top of the lever and the cockpit
stop.
11. Make sure that:
− The flap fully closes the two openings to
the DEFROST distribution holes.
Look or feel inside the distribution box valve.
12. If necessary, adjust the outer sheath of the
cable that goes through the tab in the control
quadrant to give the correct ‘bounce’.
13. Install the heat control valve. Refer to the Install The Heat Control Valve
　
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