The water treatment module has a:
The Heating and Disinfection Control Unit
The heating and disinfection control unit controls and monitors the functions of the water treatment module. The water treatment function is started automatically when it receives a flight-phase signal from the CIDS.
The Potable Water Heater and the Temperature Sensor
The water heater makes sure that the water in the tanks does not freeze in cold weather. The water heater is part of the potable water treatment module. The temperature sensor is installed in the feed line of the circulation pump and supplies the temperature data.
The Circulation Pump
The circulation pump makes sure that the heated water is continuously circulated through the tanks. The electrically operated pump supplies 18.9 l.min (5.0 USgal.mn) with a pressure increase of 0.7 bar (10.2 psi).
The Lavatory Water-Supply Assembly Control-Device
The Lavatory Water-Supply Assembly Control-Device (referred to as the LWSACD) is installed below the washbasin in the lavatory. The LWSACD controls and monitors the supply of warm water to the water faucet.
The LWSACD receives a signal from the water faucet for the necessary water temperature. The LWSACD changes this signal and transmits it to the thermostat. The thermostat adjusts the position of its related valve and mixes the hot and cold water together to supply the correct water temperature at the faucet.
Operation/Control and Indicating
The Lavatory Water-Supply Assembly Control-Device (referred to as LWSACD)
There is an ON/OFF button at the bottom of the LWSACD to activate/deactivate the component.
Push the Cleaning Mode button on the LWSACD to stop the water flow for 60 seconds. The LWSACD has indication lights to show that:
• The power supply of 28VDC and 115VAC power supplies are available
• The heater is on
• The cleaning mode is on.
The LWSACD is connected to the Multi-Purpose Interface (referred to as MPI) of the toilet assembly in the related lavatory.
Disinfection mode:
• After you start the disinfection mode through the PWIP, you push the flush switch of the toilet assembly to start the disinfection in that lavatory.
• During this special disinfection procedure, the MPI of the toilet assembly sends a signal to the LWSACD.