Siemens S55561-F112, Manual, Page: 15 / 40

15 / 40
Siemens Ultrasonic heat and cooling energy meters UH50.. CE2N5324en
Building Technologies 2013-01-14
F7 Fault in the internal memory Replace meter
F8 Errors F1, F2, F3, F5, or F6 for
more than 8 hours, detection of
tampering attempts.
No further measurements are
made Action dependent on error code;
error message F8 must be reset
by service department
F9 Error in the electronics Replace meter
The UH50.. comes programmed as follows:
Set day [TT.MM]: 01.01
Mounting
The mounting position is optional, the mounting location (return or flow) must be in
accordance with the type of meter used.
The flow measuring section must always be installed in the return.
Settling paths upstream of and downstream from the meter are not required.
If the meter is installed in the common return of 2 heating circuits (e.g. space
heating and DHW), the mounting position must be in an adequate distance from
the T-piece (min. 10 x DN) to allow the different water temperatures to properly
mix.
Before installing the meter, the system must be thoroughly flushed.
Install the flow measuring section between 2 shutoff valves with the arrow pointing
in the direction of flow. The sensors must be mounted in the same water circuit as
the flow measuring section (observe mixing). The cables must not be segregated,
shortened or extended. Connect the individual wires according to the wiring dia-
gram printed on the meter.
The sensors can be fitted in T-pieces or ball valves, or can be immersed, either
directly or in pockets (national regulations must be observed). In any case, the end
of the sensors’ probe must extend to at least the pipe center. Temperature sensors
and fittings must be sealed to prevent tampering. Overpressure must prevent
cavitation across the entire measuring range, that is, at least 1 bar with q
p
and
approximately 2 bar with q
s
(at 80 °C).
Only authorized persons are allowed to remove and replace calibration seals when
carrying out service work.
Example of mounting with a ball valve (recommended up to DN 25)
Standard parameters
Flow measuring
section
Note
Ball valve