Power Supply; Battery; Power Supply Unit - meibes Rossweiner Heatsonic Instructions D'installation

5. Power supply

5.1 Battery

A 3.6 VDC lithium battery is fitted in the standard version.
• The battery must not be recharged or short-circuited.
• Ambient temperatures below 35 °C have a positive effect on battery lifetime.
Used batteries must be disposed of at suitable waste collection points! Caution: Risk of explosion if
battery is replaced by an incorrect type.

5.2 Power supply unit

• Power supply units of 24V AC or 230V AC can be changed or supplemented at any time.
It is strictly necessary to have the protective safety cover installed at all times. Under no circumstances
connect between the two phases otherwise the power supply unit will be destroyed.
• The cable is to be fused at max. 6A and protected against tampering.
• The power supply unit notifies the meter if mains voltage is present.
• If the power supply fails, the backup battery (CR2032) provides the power supply for up to 1 year. The LCD
readings (on pressing button) and the date and time are still updated, but none of the measuring functions
work, incl. the flow rate measurement. Communication still functions over the optional M-Bus, RS485, RS232
modules or the optical interface, but reduces the life of the backup battery. The wireless function is switched
off in the event of power supply failure.
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