Unit Status Contact / Maintenance Pre-Alert; Production Request Analogue Output; Final Checks; Preparing For Operation - Carel heaterSteam User Manual

4.9 Unit status contact / maintenance pre-
alert
The humidifi er controller is fi tted with a relay contact for remote signalling
of unit status. The contact is normally open. When the unit is producing
steam, the contact is closed. The unit status contact (250 Vac; max capacity:
2 A resistive - 2 A inductive) is connected to terminals M5.1, M5.2.
M12
3 2 1
Fig. 4.ae
M5.1 Unit status contact (NO)
M5.2 Unit status contact common
Contact M5.2 is confi gured by default as the unit status contact. The same
relay can also be confi gured as a maintenance pre-alert, proving a signal
before the actual maintenance alarm is activated, allowing maintenance
to be scheduled. See paragraph "7.2.7 Cylinder operating hours" for
further details on confi guring the warning.
To confi gure digital output M5.2 as a maintenance pre-alert, set:
Screen index Screen description
Eb07 Digital output M5.2
Ea07 Cylinder operating hours

5.1 Preliminary checks

Before starting the humidifi er, check that:
•
the water and electrical connections are made and the steam
distribution system is confi gured according to the instructions
contained herein;
•
the shut-off tap for water into the humidifi er is open;
•
the power fuses are installed and intact;
•
terminals M2.7 and M2.8 are connected by jumper or connected to the
remote ON/OFF contact, and that the latter is closed;
•
the probes or the external control device are correctly connected (and
that the earth of these devices is electrically connected to the earth of
the main control board);
•
the steam outlet pipe is not choked;
M1 M5 M6
1 2 1 2 1 2 3
parameter
Maintenance pre-alert
Set the warning parameter
(hours)
5.

PREPARING FOR OPERATION

4.10 Production request analogue output

The humidifi er controller is fi tted with an analogue output (0-10 V signal)
that refl ects the production request.
The production request output (0-10 V max 10 mA) is connected to
terminals M8.1, M8.2.
M9
1 2 1
M8.1 Production request analogue output
M8.2 GND
IMPORTANT WARNINGS: to avoid unbalanced control, the earth
of the probes or external controllers must be connected to the unit
controller's earth.

4.11 Final checks

The following conditions represent correct electrical connection:
1. mains power to the humidifi er corresponds to the voltage shown on
the rating plate;
2.
the fuses installed are suitable for the line and power voltage;
3. a mains disconnect switch has been installed so as to be able to
disconnect power to the humidifi er;
4.
the humidifi er has been correctly earthed;
5.
the power cable is fastened to the tear-proof cable clamp;
6. terminals M2.7, M2.8 are jumpered or connected to an enabling
contact;
7.
if the humidifi er is controlled by an external controller, the signal
earth is electrically connected to the controller earth.
•
in the event of ducted humidifi cation, the operation of the humidifi er
is slave to the operation of the air fan (replacing or in series with the
remote ON/OFF contact);
•
the distributor condensate return pipe is installed and free;
•
the drain pipe is correctly connected and free.
Important: before starting the humidifi er, check that it is in
perfect condition, that there are no water leaks and that the
electrical parts are dry.
25 "heaterSteam" +0300080EN - rel. 1.0 - 27.04.2016
M2 M8
2 3 4 5 6 7 8 1
0-10V
Fig. 4.af
ENG
2