Controls - OMAC B Series Operation And Maintenance Manual

4.2 Controls

The LDPU can be equipped, upon request of the Customer and as an additional optional feature, with an electric control panel, where the "control ac-
tuators" are positioned for its operation.
All control, signalling and adjustment devices are marked with symbols and codes that enable to quickly understand their functions, as described below.
The same devices are marked with different colours: each colour has a specifi c meaning.
COLOURS FOR LUMINOUS INDICATORS
RED
YELLOW
GREEN
WHITE
BLUE
Below there is the illustration of the basic composition of an electric panel:
A
When main switch A is in position "1" or in position "2", one cannot open the electric panel because in this position opening is inhibited by an interblock.
One can open the control panel only by putting the switch in "0" position.
The indicator light, marked with letter B, when on indicated that the electric panel is "under voltage". this condition occurs only if button A is in position
"1" or in position "2".
The emergency stop button, marked with letter E, has the function to block the operation of the LDPU with immediate effect, in emergency
conditions. .
However it can be used to stop operation of the LDPU even in case of normal functioning, when switch A is not present.
NOTE
The particular "mushroom" shape of the button enables easy and quick intervention of the operator, in addition a mechanical retention blocks it in pressed
position.
Only after having released the button can one restore the normal operation conditions of the LDPU. One can rearm the button by slightly rotating the
knob anti-clockwise.
The on button, marked with letter D, is for starting the LDPU in normal and continuous operation mode. The
on and off conditions are signalled by the green light incorporated in the button: when the warning light is on it indicates that the LDPU is on, when it is
switched off it indicates that it is off.
The indicator light, marked with letter C, which indicates "CIRCUIT BREAKER TRIPPED", lights up for an operation anomaly
of the LDPU, the electric motor is in overload. To reset normal operation conditions one must restore the "circuit breaker" as specifi ed in the use and
maintenance instructions of the electrical supply.
The electric control panel can be equipped with an inverter, as an additional optional feature: it can be identifi ed, in the fi gure below, with
letter G, which indicates the operation warning light, and with letter F, which indicates speed adjustment potentiometer, which is needed to
set the electric power supply voltage manually.
2
Chap.4 - pag.
MEANING
DANGER / ALARM
ATTENTION
SICUREZZA
NEUTRAL
ACCORDING TO NEEDS
B C
E
D
G
Via Giovanni Falcone, 8 42048 Rubiera (RE) - Italy
E-mail:info@omacpompe.com SitoWeb:www.omacpompe.com
CONTROLS
RED
YELLOW
GREEN
In the fi gure to the side one can identify:
A MAIN SWITCH
B LINE WARNING LIGHT
C CIRCUIT BREAKER TRIPPED WARNING LIGHT
D ON BUTTON + ON WARNING LIGHT
E EMERGENCY STOP BUTTON
The main switch, marked with letter A, is for powering or insulating the
machine electric unit, position "0" indicates the absence of voltage, position
"1" indicates the presence of voltage with the pump that operates with a cer-
tain rotation direction, position "2" indicates the presence of voltage with the
pump that operates with the rotation direction opposite to that of position "1".
An inverter is in fact an electronic device able to vary the rotation
F
speed of electric motors, which is directly associated with the supply
voltage frequency.
Section 4.2.1.1 shows a simple mathematical formula for calcu-
lating the power supply frequency, knowing the number of output
revolutions of the control unit.
O.M.A.C. s.r.l.
Tel.0522/629371 - 629923 Fax 0522/628980
Rev.4 del 01/2011 O.M.A.C. s.r.l.
MEANING
EMERGENCY ACTION (STOP / DISABLING)
INTERVAL
START / ENABLING