10
11
CONNECTION DIAGRAM
Options
Large calculator:
Remove the user seal on the cover screw. Expose the screw terminals by opening the cover (screw). Connect the cable
according to the diagram and secure strain-free. Break the corresponding cable holes out of the cover. Screw on the cover
and secure the screw with a new user seal.
Small calculator
Large calculator
blue
white
black
re
d
br
own
white
Remote display of
energy / volume
M-BUS
M-Bus 4 water meter
M-BUS
with power supply
2 water meters
SPECIFICATIONS
Specification for pulse output for energy and
volume remote display*
Scanning voltage
max. 30 V, min. 2,5 V
Max. permissible
20 mA
Max. internal
resistance Ron
100 Ω (during remote display pulse)
Pulse width
120 ms
Pulse value
Energy: 1 KWh (or 10 MJ),
Volume: 10 l
Pulse
characteristics
Pull-Down circuit
*) In the factory option “Combi” for use in combined heat and
cold systems, the pulse output labelled “V” is used as a cold
energy pulse (1 kWh).
Input specification for water meter
Pulse value
1 / 2.5 / 10 / 25 / 100 or 250 l / pulse
(programmable via push-button,
same pulse value for all connected
water meters)
Scanning voltage
typically 3 V
Pulse detection
Contact closed R < 500 Ω /
contact open R > 1 MΩ
Pulse length/pause
> 3 s each
Cable length
max. 10 m
Specification of the M-Bus interface:
Standard reference
EN 13757-3
Baud rate /
Protocol
300 baud / 2.400 baud / variable
Protocol, low-byte-first
Default data
Manufacturer number, energy,
volume, power, flow rate, tempe-
ratures (supply, return, difference),
operating time, date and time,
optional volume water meter 1...4,
firmware version, software version
18 key date
data sets
Energy, volume, optional maximum
values of power, flow rate and sup-
ply temperature with time stamp,
volume of water meter 1...4
CONNECTION DIAGRAM
CONNECTION DIAGRAM
COMMISSIONING (FIG. 1)
Open the ball valves / shut-off valves. Switch on the circulation pump. Check for
leaks.
PLAUSIBILITY CHECK (FIG. 1)
Activate the unit display by pressing the push-button. Perform the LCD test.
Check the values for flow rate, supply temperature and return temperature for
plausibility, check the error display (see operating instructions).
Attention:
To document the plausibility check, please fill in the installation
handover report (removable page in inner section).
SEALING MK (FIG. 2)
Secure the head ring with a red plug-in seal (barb to the centre of the housing)
and the supply and return temperature sensors with a sealing sleeve, to prevent
unauthorised deinstallation. Alternatively, the temperature sensors can be
secured with the supplied wire and metal snap-on seal. If necessary in the event
of incorrect installation, break open the seal with a screwdriver, and secure again
with a metal snap-on seal after the installation has been corrected.
SEALING V (FIG. 3)
Secure the screw-in connection of the meter and the supply and return
temperature sensor with wire and metal snap-on seal, to prevent unauthorised
deinstallation.
UNIT INSTALLATION (FIG. 4)
Place the unit on the flow rate sensor/wall mounting bracket and press down until
it locks into place.
Fig. 1
Installation
Fig. 2
Se
al
CLICK
Deinstallation
Fig. 3
Seal
Wall mounting bracket on a pipe
Unit on the wall mounting
bracket on the wall
Unit on wall mounting
bracket with magnet in
cabinet
Cable ties
Length of connecting cable for flow rate sensor/unit: 0.5 m
Fig. 4
COMMISSIONING AND SEALING
