UH50 Ultrasonic Heat Meter
Installation and Service Instructions
UH 206-101c
Page 5 / 8
Slot for module #2 is equipped
with...
Pulse
module
AM = Analog module
MB = M-bus module
CL = CL module
RM = Radio module
AM
“standard“
“fast” *)
MB CL RM
AM
yes
yes
yes
yes (4)
yes
yes
“standard”
yes
yes (3)
yes (2)
yes (4)
yes
yes
Pulse mdodule
“fas
t”
no
no
no
no
no
no
MB
yes
yes
yes
yes (4)
yes (1)
yes
CL
yes
yes
yes
yes (1)
no
yes
Slot for module #1 can be equipped with ...
RM
no
no
no
no
no
no
*) only 1 module with fast pulses is possible, only
permissible on slot 2; min. pulse duration = 2 ms, if
pulse module 1 not fitted
(1) For M-bus with controller coupling, the CL read-
out can take up to 40 s
(2) Pulse length of the fast pulses min. 5 ms
(3) The first and second channel can be
parameterized individually
(4) The secondary address for both modules can
only be changed via module No. 1
Installing a communication module
The communication modules are connected via a 6-
way reaction-free connector so that installation or
replacement is possible at any time.
Put the communication module in the correct
position, carefully insert it into the two guide slots,
and push it in.
For connection with the external cable, strip the
sleeve to ensure the correct cross-section of the
connecting cable. Feed the cable through the sleeve
from outside, strip it back and connect it. A cable
shield must not be connected to the heat meter.
Unsure you use the correct slot for the modules and
comply with the permissible combinations.
Factory-installed sensors
Do not disconnect, shorten, or extend the cables of
factory-installed sensors.
Sensors installed by the customer
In the case of sensors provided by the customer
(max. cable length 5
m – an extension is
impermissible!), the 2
nd
and 3
rd
sleeve from the left
must be cut to ensure the correct cable cross-
sections.
Unlatch the housing cover by pressing in the side
tabs and remove it. Route the cable of the flow
sensor from outside through the 2
nd
sleeve, the
cable of the return sensor through the 3
rd
sleeve.
Strip back both cables as shown in the diagram.
Wire-end ferrules
Connect the conductors as shown on the circuit
diagram printed on the unit. The 2-wire connection is
made at terminals 5/6 and 7/8. No cable shield must
be connected to the heat meter. Then inset the
sensors in the pockets, ball valves, or T-elements
and seal against tampering.
If an error message “F8” is shown, it can be reset
via the parameter setting menu (see following).
Replace the housing cover and press it in gently
until you hear all the tabs latch.
Parameter setting
Note: The housing cover has to be removed
temporarily in order to operate the service button.
Setting the date / time
Units with a power supply unit or new battery
connected in situ may start directly in the setting
menu for the date and time.
Enter the date
Enter the time
Return to normal mode (manual)
Press LCD button 1 repeatedly until the required
value is shown. Then press LCD button 2. Change
the value for the date or time as described under
Performing parameter setting
.
Service button
LCD button 1
LCD button 2
LCD display
Cover tabs
Cover tabs
Adhesive
label
