23/75
G.83.0170 - Release 8.1.0 CH 2014
ista International GmbH - Grugaplatz 2 - 45131 Essen
http://www.ista.com
2.
Check the heating system for impermeability and ven-
tilate it thoroughly.
3.
Message F0 disappears after 10 s at the latest. Then
check the measured "Temperatures" and "Flow" val-
ues for plausibility.
4.
Remove air from the system until the flow indication is
stable.
5.
Attach the seals to the screw fittings and the sensors.
Exchange
1.
Note the direction of flow and compare with the arrow
on the meter.
2.
Close the shut-off devices in front and behind the in-
stallation site.
3.
Remove the seals.
4.
Detach the calculator from the wall, if applicable.
5.
Remove the temperature sensor from the tee, ball
valve or immersion sleeve.
6.
Dismount meter.
7.
Remove seals.
8.
For more see installation from point 4 onward.
Reading
On every monthly reporting date, the calculator stores the
following values for 24 months:
▪
Thermal energy (meter reading)
▪
Volume (meter reading)
▪
Off-hours meter (meter reading)
▪
Max. flow with date and time
▪
Max. performance with date and time
▪
Max. flow and return temperature with date and time
One can read the meter in two ways:
1.Via the optical interface
2.Manually via the display loops
Error codes and IDs
The heat meter carries out self-diagnostics continuously
and can therefore indicate various installation and device
errors:
Technical data
▪
Ambient class:
A (according to EN 1434) for indoor in-
stallation
▪
Mechanical class:
M1 acc. to 2004/22/EG (Measure-
ment Instruments Directive)
▪
Electromagnetic class:
E1 acc. to 2004/22/EG (Mea-
surement Instruments Directive)
▪
Storage temperature:
-20 °C to 60 °C
▪
Max. altitude:
2000 m above sea level
▪
Ambient humidity:
< 93 % RH at 25 °C, non-condensing
Technical data of the calculator
▪
Ambient temperature:
+5 °C - +55 °C
▪
Temperature range:
0 °C - 95 °C
▪
Temperature difference:
3 K - 80 K
NOTICE
►
If the measured val-
ue is below the re-
sponse threshold, a
‘u’ is displayed as the
leading digit in the flow, output and tem-
perature display.
Error
code
Error
Action
FL nEG
Wrong flow direction Check / correct the
flow or installation
direction
DIFF nEG Negative tempera-
ture difference
Check / replace the
place in which the
sensors are installed
F0
no measurable flow
Air in measuring sec-
tion/pipe, vent the
pipe (as-delivered
condition)
F1-F3, F5
- F6
Temperature mea-
surement error
Replace the meter
F4
Battery empty
Replace the meter
F7
Fault in the internal
memory operation
Notify service depart-
ment
F8
Tampering detected,
no more measure-
ments are taken
Replace the meter
F9
Faults in the elec-
tronics
Notify service depart-
ment
