CTP21 (29.05.2019)
Manual de ususario
/ User’s Manual / Manuel d’utilisation
Pag.4/9
GECA S.r.l. - Via Enrico Fermi, 98 25064 GUSSAGO (BS) ITALY Tel. +39 030 3730218 - Fax +39 030 3730228
VERIFICA FUNZIONAMENTO
Verificaciones periódicas
: Recomendamos realizar la verificación funcional cada 6-12 meses según el uso. Para
la verificación de detectores remotos consulte las instrucciones específicas.
IMPORTANTE
: La prueba debe realizarse con extremo cuidado y por personal autorizado y capacitado, ya que las
salidas (relés) se activan, lo que hace que los dispositivos de alarma conectados se activen. El botón
TEST
se
desactiva en caso de alarma.
Verifica el funcionamiento eléctrico de la unidad de control
: mantenga presionado el botón de
TEST
durante 5
segundos, se iniciará el procedimiento de
TEST
, se enciendan los 3 LEDs y se activan los relés de
FALLA
y
ALARMA
1
; el LED rojo de
ALARMA
se enciende y el relé de
ALARMA 2
se activará. Luego, después de 5 segundos, la unidad
vuelve automáticamente al funcionamiento normal.
NOTAS
: la función de
TEST
se activa en todos los canales, incluso si está deshabilitada o con los LEDs de falla y
/ o 1º y / o 2º ON. Pero no se puede usar si una o más entradas tienen más del 10% de LEL (3° y / o 4º LED ON).
EN
DESCRIPTION
The
CTP21
is a control unit for heating plants or environments to be protected from possible gas leaks,
which can be
connected up to 3 remote catalytic detectors for flammable gases. It can be connected to the following detectors:
•
The ST441M and SE193KM
or SE182KM
should be used in plants using Methane.
•
The ST441G and Se193KG
or SE182KG
should be used in plants using LPG.
The
CTP21
is for wall mounting and the protection code is IP65. It is mains powered at 110÷240VAC / 50÷60Hz but
can also be connected either to an external 24VDC power supply (e.g. p
ower supply unit with two 12V-7A/h buffer
batteries, our mod. PS180/24VDC
).
On the front plate, there are three vertical Led bars that indicate the operating status and gas concentration detect-
ed by each remote detector and two
function keys (
TEST e RESET
).
The control unit has two alarm levels with sealed relay outputs (
ALARM1 e ALARM2
), with tension free changeover
contacts. Furthermore, it is also present another output relay (
FAULT
) in positive safety for fault situations, and an
auxiliary input (
AUX
), configurable as an input to connect NO contact devices such as a
manual Button
or as a con-
trol input for our
Manual NC Resetting Valve with positioning sensor
.
In Fig.1
a connection example with 3 remote gas detectors, siren, manual reset solenoid valve and manual button.
OPERATIONAL DESCRIPTION
Preheating
: when
the control unit is powered, the 60 seconds preheating phase begins. This is only for the enabled
inputs (remote detector installed), on the corresponding Led Bar, the yellow LED flashes and at the end of the pre-
heating, the green LED "
ON
" lights up.
Normal operating
:
the control unit reads the gas concentration through the remote gas detectors of the enabled
inputs and displays the status on the corresponding Led Bar.
The
Green LED
lights up
to indicate the normal operation and the presence of power
1
st
Red LED:
lights up
if the gas concentration exceeds 4% LEL.
2
nd
Red LED:
lights up
if the gas concentration exceeds 8% LIE.
3
nd
Red LED (
ALARM 1
):
lights up
if the gas concentration exceeds
the 1
st
alarm threshold (configurable to 10 or
15% LEL)
and
within 5 secondsthe
ALARM 1
relay will activate. This relay is normally used as a prealarm using a si-
ren (
Our model SE301A when powered by 230VAC or the model SE301B when powered by 24V
DC
).
4
st
Red LED (
ALARM 2
):
lights up
if the gas concentration exceeds
the 2
nd
alarm threshold
(20% LEL); if the gas
persists, after 30 seconds, the red LED
ALARM 2
lights up
and the
ALARM 2
relay will activate. It
is configurable in
positive (normally excited) or negative logic.
It is normally used to stop the gas through the manual reset solenoid
valve and/or the interruption of the electrical power at the plant only,
the control unit must remain powered.
If the manual button is connected to the AUX input, when pressed, the
ALARM 2
relay will be activated.
If it has been installed a manual reset solenoid valve N.C. with magnetic sensor (mod. VR420÷VR480) connected to “
AUX
” input, in the
case that the gas is still open, the yellow LED and the
FAULT
Relay will activate (see
FAULTS
section).
“RESET” Key
:
this key has two functions:
SILENCING
:
when the key is pressed, the 3
rd
Red LED on the alarm channel flashes and the
ALARM 1
relay con-
nected to the Siren is silenced, but after 120 seconds, it will automatically reactivate.
RESET:
if the 2
nd
alarm threshold is exceeded, the
ALARM 2
relay and the channel LED bar in alarm
remains
acti-
vated (
latched
), even if the gas concentration decreases (
because the mounted valve is closed
, if installed).
After
having eliminated the cause of the alarm, to restore the normal working conditions press the
RESET
key. For
safe-
ty
, the key cannot operate when the remote detector is detecting gas.
Faults
:
The control unit indicates a fault condition of a remote gas detector
, with
the yellow LED on the correspond-
ing channel and the
FAULT
relay
will activate. This relay
is
normally energized with voltage-free changeover con-
tacts
, if necessary, it can be used both to signal remotely an occurred damage and to signal the absence of power
to the instrument.
Fault signals must not be connected to the alarm signals.
Manual reset solenoid valve NC with magnetic sensor failure:
this situation appears
ONLY
when is installed an electro
valve with magnetic sensor; if it not close the gas, (with the
ALARM 2
relay in alarm), the magnetic sensor signals to the control unit the mal-
function. In this case all LED will be lighted and relays will be activated. The failure condition (yellow led lighted and
FAULT
relay activated)
will be cancelled if pressing the
RESET
key, the solution of the problem will be visualized.
