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2018-05-09
5.2.1.2. Customer temperature sensors
Only approved and matching pairs of temperature sensors with 2-wire connection method could be used. Customer temperature sensor
connection procedure:
1.
Before installation check that the temperature sensors are paired with each other (T1 with T2).
2.
By means of pliers remove the protective caps from the two leftmost sealant holes in the bottom part of calculator enclosure (hole 1 and 2).
3.
Insert the wire of supply temperature sensor T1 wire through the hole 1 and the return temperature sensor T2 wire through the hole 2.
4.
Use 2-wire connection method of temperature sensor connection and connect the supply temperature sensor T1 to terminals 5 & 6, and the
return temperature sensor T2 to terminals 7 & 8 (see Fig. 10.1.).
5.2.2. Installation of expansion modules in the calculator
The expansion modules for the heat and cooling meter are supplied in form of PCBA (printed circuit boards) packed in anti-static protective foil.
Handle the devices carefully after taking them out of the protective foil. The circuit boards may only be touched on the edges and should be
mounted in the meter immediately after removing them from the anti-static foil.
Do not recharge or short-circuit additional batteries supplied with the M-Bus and wM-Bus communication modules (to extend operating life of
the meter with communication module to 11 years) and factory-installed in the calculator. Keep the batteries away from contact with water and
do not exposed them to temperatures above 80°C.
5.2.3. Installation of the M-Bus module
Module installation procedure:
1.
Remove the installer's security seals from the calculator enclosure.
2.
Open the calculator's lid by releasing the black latches on the left and right side of the enclosure.
3.
Put the module into designated contact socket (see Fig. 5.3.). The contact pins of module must not be bent.
4.
Fix the board of the module to the calculator body with two fixing screws supplied with the module.
5.
Install the additional battery in the second battery holder and connect the module plug to the second battery connector.
6.
By means of pliers remove the protective cap from the rightmost sealant hole in the bottom part of calculator enclosure.
7.
Insert the data communication cable in sealant hole and route the cable through an available cable fittings and make a strain relief protecting
wire against being pulled out from the outside.
8.
Connect the data communication cable wires to the screw terminals on the M-Bus module (bipolar connection). For full description of screw
terminal assignment used in communication modules see Table 10.2.
9.
Close the lid of the calculator, fasten the latches on the sides of the calculator enclosure and mount again the installer's security seals.
Fig. 5.3. Installation the M-Bus module in the meter’s calculator.
M-Bus module enables reading the heat and cooling meter via its primary address (default: 0) or secondary address (default: meter serial
number) over a wired M-Bus network. Default baud rate: 2400 bps, data format: 8E1 (8 data bits, even parity, 1 stop bit).
5.2.4. Installation of the radio wM-Bus module
Module installation procedure:
1.
Follow steps from 1 to 5 described in "Installation of the M-Bus module" procedure.
2.
Remove the jumper from the pins of the radio wM-Bus module, if jumper is installed (see Fig. 5.4.).
3.
Close the lid of the calculator, fasten the latches on the sides of the calculator enclosure and mount again the
installer's security seals.
The data can be read by the radio module using the radio number (stored in the calculator and by default set to meter serial number) and the
decryption key that could be found on label affixed under the flap of the meter unit packaging (if device was purchased with factory installed
