Power Supply; Battery Supply; Mains Modules - Kamstrup MULTICAL 41 Installation Manual

5. Power supply

MULTICAL 41 can be power supplied by a built-in lithium battery,
®
a 24 VAC internal mains module or an internal 230 VAC mains
module.
The two wires from the battery or mains module are to be
mounted in terminals 60 and 61 of the calculator.
The polarity must be correct; connect the red wire to terminal
no. 60 (+) and the black wire to terminal no. 61 (-).

5.1 Battery supply

Connect MULTICAL 41 to a lithium battery, D-cell. The battery
®
is marked with installation year, e.g. 2007, and production date.
Obtain optimal battery life by keeping the battery temperature
below 30°C.
The voltage of a lithium battery is almost constant throughout
the entire lifetime of the battery (approx. 3.65 V). Therefore,
it is not possible to determine the remaining capacity by mea-
suring the voltage.
The battery cannot be and must neither be charged nor short-
circuited. Used batteries must be handed in for approved de-
struction e.g. at Kamstrup A/S.

5.2 Mains modules

The modules are in protection class II and are connected via a two-
wire cable (without earth) through the cable bush of the calculator
placed at the top left corner of the connection unit.
Use connection cable with an outside diameter of 5–10 mm
and secure correct dismantling as well as correct mounting of
the cable relief.
Max. permitted fuse: 6 A
National installation regulations must be obeyed. For installa-
tion in Denmark: See Elråd Message concerning installations
to net supplied heat meters.