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Figure 1: Three-phase voltage 400 V
Figure 2: Single-phase voltage 230 V
(default setting)
(max. 3 kW)
WARNING: Do not forget to connect ground conductor!
The water heater must be connected with water inlet and outlet pipes. Other metal parts of
the water heater with which the user may come in contact with and which may come in
contact with water, should have permanent and reliable connection to ground conductor.
Connecting the heater to the electrical circuit must take place in accordance with the
standards for electrical appliances. An all-pole disconnect device must be installed
between the heater and the electrical circuit to comply with the national installation
regulations. Automatic fuse may also be used as circuit breaker.
Connection to water supply network
Take into account instructions for installation, connection and use of the water heater.
Make sure the water heater cannot be switched on when empty.
Starting up
Fill the heater with water before connecting to the power supply network. Supervise the
first heating cycle. During the heating cycle, the water expands and with closed-pressure
connecting system the water starts dripping from the relief valve, while with open-non-
pressure connecting system the water starts dripping from the water tap. Monitor the
automatic switching off of the thermal regulator.
Any repairs should be made using original spare parts only!
User's instructions
1. Occasionally remove the lime scale deposits on the electric heating element (the
intervals depend on the hardness of water of your water supply and on the operating
conditions. We recommend installing a device for regulation of water hardness or you can
reduce the temperature for heating the water. Any damages resulting from damaged
electric heating element caused by lime scale depositing, shall not be covered by
guarantee.
2. Taking into account the quantity of hot water required, the temperature in the water
heater is continuously adjustable with thermal regulator. Maximum setting of the
temperature is ca. 75 °C, and minimum temperature setting is ca. 9 °C. When setting to 75
°C, the temperature is reduced to ca. 65 °C before the heater is again switched on. In
order to prevent lime scale depositing on the heating element, we recommend setting the
thermal regulator to temperature setting lower than 60 °C, as evident on the drawing
bellow:
18