UH50 Ultrasonic Heat Meter
Installation and Service Instructions
UH 206-101c
Page 3 / 8
Mounting as a cold meter
When mounting a
cold meter
or
combined
heat/cold meter
, make sure the black cover on the
measuring tube is oriented to the side and
downward (because of water condensation).
The measuring tube must
always be mounted in
the return
. The electronic unit must be separated
from the flowrate measuring tube and, for example,
mounted on the wall (split mounting). Make sure that
condensed water cannot run along the connected
pipes into the electronic unit (building a loop
downwards).
cover of flow sensors
Allowed position of the cold meter
Electronic unit
The ambient temperature of the electronic unit must
not exceed 55°C. Direct sunlight must be avoided.
For heating water temperatures between 10°C
and 90°C,
the electronic unit can remain on the
volume measuring unit or be mounted on the wall
(split mounting). On the wall or on the volume
measuring unit, the adapter plate can be oriented to
make it easy to read the display. To remove the
electronic unit, push the housing upward and
remove. The adapter plate for wall mounting can
now be unscrewed or the electronic unit simply
rotated and pushed back into the required position
until it latches.
Adapter plate
(top view)
Adapter plate
(cross-section)
For heating water temperatures between 10°C
and 90°C
, the electronic unit must be fixed on the
wall (split mounting). For this purpose, remove the
electronic unit from the adapter plate, unscrew the
adapter plate from the volume measuring unit, and
screw to the wall with plugs. Push the electronic unit
on again.
A heat meter with a
removable control cable
may
be separated during the installation. When
installation is done be sure that only paired parts
(volume part, calculator) are connected together.
The control cable must not be extended!
Power supply
The heat meter can be powered either with a battery
or via power supply modules. The 110 V / 230 V
power supply modules are encapsulated and comply
with safety class II. The modules can be retrofitted
or upgraded at any time.
In the standard version, a battery is inserted in the
factory. This must not be opened. It must not come
into contact with water or be exposed to
temperatures exceeding 80°C. Used batteries must
be disposed of at suitable waste disposal facilities.
In a special version, a power supply module can be
installed. In the 110 V AC and 230 V AC versions, a
cable is brought out in the factory that must be
connected to the line voltage accordingly. The
24 V AC/DC version has terminals instead of a
cable.
The 110 V or 230 V power supply unit must be fuse-
protected with 6 A near to the heat meter and
protected from tampering.
Insert the battery
Press the four side tabs of the housing cover inward
and remove the cover. Then turn the label plate
counterclockwise until you feel it has gone as far as
it will go.
Swing open the red locking hatch to expose the
relevant battery compartment (left compartment for
2x “AA” or “C”, right compartment for “D”).
Insert the battery into the relevant compartment of
the electronic unit with the correct polarity as
marked.
Turn the label plate back clockwise into its original
position.
Note: “AA” and “C” size batteries are snapped into a
holder.
In case of a meter's return via airfright the battery
("C" and "D" cell) has to be generally dismounted
and forwarded separately from the meter.
Locking hatch
Plug connector
