Rinnai EHP-WH110, User'S And Installer'S Manual

Page: 18 / 48

18
2.4.5 How to replace the magnesium anode
The Magnesium anode is an anti-corrosion element. It is assembled in the
water tank to avoid the creation of oxide layers inside the tank in order to
protect it with the other components. It can help to extend the life-span of
the tank.
ATTENZIONE
Replace the magnesium anode every 6 months, clean it if it is intact but encrusted by limestone.
• Turn the power of the unit ‘OFF’ and pull out the plug
• Drain all the water out of the tank.
• Remove the bottom flange where the magnesium anode and the electric
heater are installed.
• Unscrew the old anode from the holder.
• Replace it with a new magnesium anode.
• Screw again the flange.
• Recharge the water.
2.4.6 Regulation thermostat of the electric heater
The auxiliary electric heater is equipped with a thermostat for regulation; to access this component, you should remove
the bottom cover.
The factory setting is made at its maximum value 85°C; any modification of such value is not recommended as it could
produce malfunctions on the legionella cycle control (For such purpose it is required to read carefully the paragraph
4.5.2).
2.4.7 Schematic overview of the water and gas circuit
Hot water outlet
Cold water inlet
WATER TANK
Low pressure
switch
Temperature
sensor
4 way valve
High pressure
switch Temperature
sensor
Air outlet Air inlet
EVAPORATOR COMPRESSOR
ELECTRONIC
EXPANSION
VALVE