WL400 Manual Page 52 – Revision: 10-23-201917. On Back of Cabinet, connect two pieces of tubing to the RO Drain andWater Out line and run to external drain.18. Connect power cord to WL400 Water Treatment System and turn on Red Power Switch.19. Connect power to WL400 Water Treatment System. Turn on Red PowerSwitch I=ON. DO NOT TURN ON THE GREEN HEATER/COMPRESSORSWITCHCAUTION! NEVER TURN ON HEATER BEFORE FILLING HOT TANK.Green Heater/Compressor Switch must be in the O=OFF position whilethe hot tank is empty. Damage could occur within one minute and the overloads (high limit)will require manual reset if heater is turned on with an empty hot tank.20. Connect supply water to Water In Fitting on back of cabinet. Turn on water supply and flush ROsystem to drain for 4 hours. Water should be draining from both Water Out line and the DrainLine.21. After 4 hours of flushing, turn Off Incoming Water. Connect water line from the Base Cabinet toWater In fitting on WL400 Water Treatment System.22. Open Bladder Tank and turn on supply water.23. Allow Bladder Tank to fill for 1 hour.24. Fill Hot Tank for approximately 1 minute. Depress both the “Hot” and “Extra Hot” buttons todispense. Red light should illuminate above the dispensing area after a 2 second delay.25. Fill cold tank for approximately 2 minutes. The Blue Light shouldilluminate above dispensing area.26. Turn on Green Heater/Compressor Switch.Fill the Hot Tank27. Press the Hot Water Select Button, followed by the main dispensing button to fill the hot tank.Water will dispense from the faucet once the hot tank is full. Flush until water is clear.