(2)
Components
The heated floor panel has:
-A heating foil which is protected with an aluminium outer cover plate
-Insulation material to keep the temperature of the heating foil
-Drain holes to drain fluid
-A sensor to measure the temperature of the heating foil
-
One overtemperature thermostat
-
One self-locking overtemperature thermostat.
(3)
Operation If a control unit has a malfunction and supplies constant power to a heated floor panel, the overtemperature thermostat operates. The overtemperature thermostat operates at approximately 35 deg.C
(95.00 deg.F) and 65 deg.C (149.00 deg.F).
If the heated floor panel temperature increases more than 80 deg.C
(176.00 deg.F) the self-locking overtemperature thermostat will stop
the power supply to the heated floor panel.
B. Control Unit
(1)
General The control unit controls and monitors the heated floor panel(s).
(2)
Components
The control unit has:
-Circuit breaker(s) and/or fuse(s) The circuit breaker(s) and/or fuse(s) protect(s) the power supply to the heated floor panel(s).
-Test pushbutton(s) When you push the test pushbutton(s), you start a BITE test of the control unit.
-Indicator(s) The indicator(s) come(s) on when the BITE test is satisfactory.
(3)
Interface
The control unit has a discrete 28 VDC interface with:
-The galley supply (Ref. 24-56-00).
(4)
Operation The control unit supplies electrical power to the heated floor panel(s):
-
When a sensor of a heated floor panel senses a temperature less than 29 deg.C (84.20 deg.F). The control unit removes the power supply from the heated floor panel(s):
-
When a sensor of a heated floor panel senses a temperature more than 32 deg.C (89.60 deg.F).
7. Operation/Control and Indicating
________________________________
A. Heated Floor Panel System
(1)
General The heated floor panel system operates automatically when:
-
The galley supply system operates.
-
The circuit breaker(s) of the heated floor panel system are closed.
(2)
Operation The operation of the system depends on the environmental temperature. The heated floor panels operate automatically when the sensors of the panel sense a temperature which is much colder than the temperature in the cabin.
8. BITE Test
_________
A. Heated Floor Panel System
(1)
General Each control unit has a BITE. The BITE starts and operates when you push and hold the test button on the control unit.
(2)
Tests
The self- test does a check of:
-
The internal logic of the control unit.
-
The connected heated floor panel temperature sensor(s) and heating element(s).
(3)
Indications
If the test is ok:
-The test indicators come on.
If there is a failure:
-One or all test indicators do not come on.
ANCILLARY EQUIPMENT (INCLUDING DOOR AREA HEATING PANELS) - ADJUSTMENT/TEST
__________________________________________________________________________
TASK 25-27-00-740-001
Bite Test of the Heated Floor Panel System.
1. Reason for the Job__________________
Self Explanatory
2. Job Set-up Information______________________
A. Referenced Information
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REFERENCE DESIGNATION
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