R **ON A/C 151-199, 301-399, 401-499,
 (Ref. Fig. 002A)
 -------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
 -------------------------------------------------------------------------------11DV NIPPLE-FILL AND DRAIN 171 171AL 30-72-52 12DV THERMOSTAT-FILL AND DRAIN NIPPLE 171 30-72-11 13DV NIPPLE-OVERFLOW 171 171AL 30-72-52 14DV THERMOSTAT-OVERFLOW NIPPLE 171 30-72-11
 **ON A/C ALL
 3. System Description
__________________
 **ON A/C 001-049, 051-099, 101-149, 201-299,
 A. Potable Water Service Panel The potable water service-panel is located at the aft left hand side of the lower fuselage shell. The fill/drain nipple (referred to as the nipples) are electrically heated with a foil heating element. The foil heating element is part of the nipple. A temperature thermostat is installed adjacent to the nipple and permamently measures the nipple temperature. The temperature thermostat is connected to the nipple foil heating
R element. When icing conditions occur the thermostat will turn on the foil R heating element. An overtemperature switch prevents damage to the foil heating element.

 Component Location - Heater/Thermostat
 Figure 002

R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 30-72-00Page 5 1 1 May 01/05 1 1 1CES 1

 Component Location - Heater/Thermostat
 Figure 002A

R 1EFF : 151-199, 301-399, 401-499, 1 30-72-00Page 6 1 1 Aug 01/05 1 1 1CES 1 The cut off temperature is 110 + 5 -5 deg. C (230. 00 + 9. 00 - 9. 00 deg. F).

R **ON A/C 151-199, 301-399, 401-499,
 A. Potable Water Service Panel The potable water service-panel is located at the aft left hand side of the lower fuselage shell. The fill/drain nipple and overflow nipple (referred to as the nipples) are electrically heated with a foil heating element. The foil heating element is part of the nipple. A temperature thermostat is installed adjacent to the nipple and permamently measures the nipple temperature. The temperature thermostat is connected to the nipple foil heating element. When icing conditions occurs the thermostat will turn on the foil heating element. An overtemperature switch prevents damage to the foil heating element. The cut off temperature is 110 + 5 -5 deg. C (230. 00 + 9. 00 - 9. 00 deg. F).
 **ON A/C ALL
 4. Power Supply
____________
 A. Potable Water Service Panel The potable water service panel is supplied with 115VAC from the busbar 210XP through the circuit breaker 15DV.
 5. Operation/Control and Indicating
________________________________
 **ON A/C 001-049, 051-099, 101-149, 201-299,
 (Ref. Fig. 003)
 A. Potable Water Service Panel
 When the busbar 210XP 115VAC is energized and the circuit breaker 15DV is R closed, the potable water service panel is energized through the R thermostat 12DV to the fill/drain foil heater 11DV.
 The thermostat permamently measures the nipple temperature, when icing conditions occur, the thermostat will turn on the foil heaters of the nipples at approx. 6 DEG.C (42.80 DEG.F) and switch off at approx. 13 DEG.C (55.40 DEG.F). Each heating circuit is protected by a micro fuse for overheat protection, the cut off temperature is 110 DEG.C (230.00 DEG.F).

 Water Service Panels - Electrical Schematic
 Figure 003

R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 30-72-00Page 8 1 1 May 01/05 1 1 1CES 1

R  **ON A/C 151-199, 301-399, 401-499, 
R  **ON A/C 151-199, 401-499,
 (Ref. Fig. 003A)
 **ON A/C 301-399,
 (Ref. Fig. 003B) 
R  **ON A/C 151-199, 301-399, 401-499,
 A. Potable Water Service Panel When the busbar 210XP 115VAC is energized and the circuit breaker 15DV is closed, the potable water service panel is energized through the thermostats 12DV and 14DV to the fill/drain foil heater 11DV and overflow foil heater 13DV. The thermostat permamently measures the nipple temperature, when icing conditions occur, the thermostat will turn on the foil heaters of the nipples at approx. 6.0 DEG.C (42.80 DEG.F) and switch off at approx. 13.0 DEG.C (55.40 DEG.F). Each heating circuit is protected by a micro fuse for overheat protection, the cut off temperature is 110 DEG.C (230.00 DEG.F). 

R 1EFF : 151-199, 301-399, 401-499, 1 30-72-00Page 9 1 1 Aug 01/05 1 1 1CES 1

 Water Service Panels - Electrical Schematic
 Figure 003A

R 1EFF : 151-199, 401-499, 1 30-72-00Page 10 1 1 Aug 01/05 1 1 1CES 1R Water Service Panels - Electrical Schematic R Figure 003B

 1EFF : 301-399, 1 30-72-00Page 11 1 1 Aug 01/04 1 1 1CES 1

 THERMOSTAT - FILL/DRAIN/OVERFLOW NIPPLE (12DV,14DV) - REMOVAL/INSTALLATION
　
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