R The potable water lines installed in the fwd and aft sections of the
R aircraft in areas where possible icing conditions can occur, are
R electrically heated with heater assemblies. The potable water lines are
R installed on supports and tightened with clamps. The heater assembly is
R attached to the potable water line with bonding tape. Insulation is
R installed to cover the heated potable lines.
R The control units, located in the forward and aft cargo compartments of the
R aircraft control and monitor the heater circuits. Each heating circuit is
R protected by a fuse, installed in its related control unit. The control unit
R controls and monitors the heater assembly. The temperature sensors are
R connected to the control unit, which constantly measures the temperature of
R the potable water lines.
R If icing condition occurs the control unit turns on the heater assembly.
R Potable Water Ice Protection - Component Location/Electrical Schematic of R Control Unit 3DW and associated Heater Circuits R Figure 002C (SHEET 1)
R 1EFF : 301-399, 1 30-73-00Page 8 1 1 May 01/04 1 1 1CES 1R Potable Water Ice Protection - Component Location/Electrical Schematic of R Control Unit 3DW and associated Heater Circuits R Figure 002C (SHEET 2)
R 1EFF : 301-399, 1 30-73-00Page 9 1 1 May 01/04 1 1 1CES 1 4. Power Supply
____________ The GND/FLT busbar 212XP-C supplies 115 V AC to the potable water system heater assemblies. The GND/FLT busbar 602PP supplies 28 V DC to the control unit 3DW control unit. The subsequent circuit breakers installed on CB panel 2000VU:
-1DW
-2DW
5. Operation/Control and Indicating
________________________________
**ON A/C 001-049, 051-099, 101-105,
(Ref. Fig. 003)
**ON A/C 106-149, 211-299,
(Ref. Fig. 003A)
R **ON A/C 151-199, 401-499,
(Ref. Fig. 003B)
**ON A/C 201-210,
(Ref. Fig. 003C)
**ON A/C 301-399,
(Ref. Fig. 003D)
**ON A/C ALL
The potable water ice protection system operates when the busbars 212XP-C
115 V AC and 602PP 28 V DC are energized and circuit breakers 1DW and 2DW
are closed.
You cannot control the system manually.
The system operates automatically on the ground and/or in the flight mode.
The control unit 3DW controls the operation of related sensors and heaters.
Potable Water Ice Protection - Electrical Schematic.
Figure 003
R 1EFF : 001-049, 051-099, 101-105, 1 30-73-00Page 11 1 1 May 01/05 1 1 1CES 1
Potable Water Ice Protection - Electrical Schematic. R Figure 003A
R 1EFF : 106-149, 211-299, 1 30-73-00Page 12 1 1 May 01/05 1 1 1CES 1
Potable Water Ice Protection - Electrical Schematic
Figure 003B
R 1EFF : 151-199, 401-499, 1 30-73-00Page 13 1 1 Aug 01/05 1 1 1CES 1
Potable Water Ice Protection - Electrical Schematic R Figure 003C
R 1EFF : 201-210, 1 30-73-00Page 14 1 1 May 01/05 1 1 1CES 1R Potable Water Ice Protection - Electrical Schematic. R Figure 003D
R 1EFF : 301-399, 1 30-73-00Page 15 1 1 Aug 01/04 1 1 1CES 1
When the sensors detect icing conditions (This depends on stored temperature threshold in the control unit), the control unit will supply electrical R power (115 V AC) to the heater assemblies. The control adjustments for the heaters are:
-
heaters ON < 6.0 +1 -1 deg.C (42.80 +1.80 -1.80 deg.F),
-
heaters OFF > 10.0 +1 -1 deg.C (50.00 +1.80 -1.80 deg. F) The control unit(s) of the potable water ice protection is (are) provided
R with an internal BITE test. The BITE test function monitors the correct function of:
-
the control and monitor circuits,
-
the connected heater circuits (tapes),
-
the connected temperature sensor,
-
the internal solid states relays,
-
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本文链接地址：A320飞机维护手册 AMM ICE AND RAIN PROTECTION 防冰和排雨2(105)
