9
Maintenance
Safety
The system owner is responsible for operational
reliability.
DANGER!
Danger of death due to electric current!
Danger of electric shock! Do not touch any live
components!
–
Switch off the supply voltage and secure it
against being switched on accidentally
before working on the unit.
–
Ensure that no voltage is present.
–
Work on the electrical system must only be
carried out by skilled qualified electricians.
Operation and maintenance
The electronic components of the controller do not
require maintenance. Special maintenance require-
ments may apply to the VAV terminal unit
depending on where it is installed.
Zero point correction
To ensure continued accuracy of volume flow meas-
urements, zero point correction of the diaphragm
pressure transducer is required in regular intervals
(not required for controllers with expansion module
EM-AUTOZERO). Carry out manual zero point cor-
rection at least once per year as part of a functional
test or maintenance. Zero point correction is auto-
matically carried out in regular intervals for control-
lers with expansion module EM AUTOZERO.
1.
For manual zero point correction remove the
two measuring tubes (blue and white) (1)
from the angled piece (2) on the sensor tube
or from the T pieces (3) on the controller.
2.
Connect the controller to your PC or smart-
phone/tablet (EasyConnect software or
EasyCon App required) see
.
3.
Start zero point correction with the software.
EasyConnect
software
- Dialogue
‘Diagnosis –
I/O ’
EasyCon App
-
‘Zero point’
4.
When the zero point correction is finished,
reconnect the measuring tubes.
Blue
- Connection to – (Minus)
White - Connection to + (Plus)
Maintenance
Control components for VAV terminal units TROX UNIVERSAL
28