AFRISO EMA AB
• Kilvägen 2, 232 37 Arlöv • Sweden • Phone +46-(0)40-92 20 50 • [email protected] • www.afriso.se
5
WGA 01
Oil- petrol- grease alarm type ema signal WGA 01
Checking
Check the connections are made correctly in
accordance with the connection details. lncor-
rect polarity of the sensor cables will result
in an alarm on the WGA 01 unit. Check the
correct cable type and size has been used.
Check the jumper link on the printed circuit
board is in the correct position for the num-
ber of probes used. Setting 1 is for oil alarm
only with an capacitance type ES4 sensor
and setting 2 is used when the optional R6
thermistor sensor is also fitted for high level
liquid alarm.
Make sure that foil connection is made
correctly to the pin connector on the circuit
board before the lid is closed.
Operating information
Normal :
No senor alarms given. Green
LED’s for ”surface” and ”high” will be illumi-
nated. Relays R1 and R2 will be energized.
Oil Surface Alarm:
VWith an oil or grease
surface alarm the red LED for ”surface” will be
illuminated and the internal buzzer sounds.
Relay R1 will be de-energized.
High level alarm:
When the liquid level in the
separator reaches the R6 thermistor probe
the red LED for ”high” will be illuminated and
the interna! buzzer sounds. Relay R2 will be
de-energized*.
Oil sensor alarm:
With a short circuit on the
surface sensor input the red ”surface” LED
flashes at a rate of 1 Hz (quick flash), with an
open circuit the flash rate is reduced to 1/3 Hz
(slow flash). In either case the interna! buzzer
sounds and relay R1 will be de-energized*.
High level alarm:
With a short circuit on the
high level sensor input the red ”high” LED
flashes at a rate of 1 Hz (quick flash), with an
open circuit the flash rate is reduced to 1/3 Hz
(slow flash). In either case the interna! buzzer
sounds and relay R2 will be de-energized*.
(* = Fail safe operation)
Pressing the RESET pushbutton mutes the
interna! buzzer only, the operation of relay
R1 and R2 is unaffected. The buzzer will
sound aga in after approximately 20 hours if
the alarm condition has not been corrected.
Warning!
The WGA 01 unit will only give an
alarm oil surface alarm if there is
a definite oil or grease surface layer
on the water in the separator chamber. Please
be aware that certain solvents and chemicals
can destroy or degrade the oil or surface layer
which could make it impossible for the unit
to provide a proper surface alarm.
The front cover of the WGA 01 unit must not
be removed when connected to a live power
supply. Please isolate before removing the
cover.
The WGA 01 unit must never be installed
within an EX zone. The sensor outputs are
certifed intrinsically safe and the ES4 and
R6 sensors are suitable for mounting in an
EX zone.
Repair and modification
Repair and modification is not permitted on
site. The unit must be sent to the manufacturer
or supplier for attention.
!
