Pilot Communications Twin Channel Gas Alarm User manual
Gas Detection Specialists
TWIN-CHANNEL GAS
ALARM
USER MANUAL
2
Contents
1. Introduction ............................................................3
2. Your Device.............................................................4
2.1 Front Panel & LED Indicators ............................5
2.2 Liquid Petroleum Gas Sensor............................7
2.3 Technical Specification......................................8
3. Installation ..............................................................9
3.1 Wiring..............................................................10
3.2 Pin Definitions.................................................11
4. Initialisation & Testing ..........................................12
4.1 Initialisation ....................................................12
4.2 Testing ............................................................13
5. Alarm.....................................................................14
6. Troubleshooting....................................................15
7. Sensor Replacement .............................................16
8. Warnings...............................................................17
9. Contact Details......................................................18
3
1. Introduction
Welcome to the user manual for your new Pilot
Twin-Channel Gas Alarm! This document is
designed to guide you through the installation,
operation and initial testing of the device, as well
provide information on any operational queries
or troubleshooting issues you may have.
The Twin Channel Gas Alarm is ideal for small and
medium sized vessels as it supports two LPG
sensors.
This product range provides critical safety
features against extremely dangerous or deadly
gases. This responsibility requires maximum
reliability which is why all our products endure an
extensive testing procedure before leaving Envin
Scientific.
4
2. Your Device
Your device is a Twin
Channel Gas Alarm.
The device supports 2x
Liquid Petroleum Gas (LPG)
Sensors and will work with
12V or 24V systems.
In the box you will have:
•1 Twin Channel Gas Alarm
Main Unit
•2 LPG sensors with 3.5m
cable
•1 User manual
•1 Sensor awareness slip
LPG Sensor
Alarm Main Unit
5
2.1 Front Panel & LED Indicators
The first LED on the front panel
of your Twin Channel Gas Alarm
is the Power Indicator. This LED
illuminates green when the unit
is powered on.
State
Power
The unit is power on correctly.
(off)
There is no power to the unit. Check wiring
and that the device is switched on.
6
Next, you will see two LED’s and a button for
each channel. The first is the ALARM LED and will
illuminate red when gas is detected. The second
is the FAULT LED and will illuminate yellow when
a fault is detected.
The test button can be used to see if the unit
alarm is operating correctly. For more in-depth
testing see section 4.
7
2.2 Liquid Petroleum Gas Sensor
The LPG sensors detect
butane/propane and
alarms at 25% LEL
(lower explosive limit).
LPG gases are heavier
than air, therefore the
LPG sensor must be
located near to the floor.
State
Channel LED’s
An OFF LED shows that the channel is
operating correctly.
SOLID yellow FAULT LED indicates a
FAULT. Check all sensor wiring
connections.
SOLID red ALARM LED indicates the unit
is ALARMING
8
2.3 Technical Specification
Specification
Value
Description
Supply Voltage
12/24V
Supply from your
system battery
Current Draw
(Standby)
140mA
When alarm not
sounding
Current Draw
(Alarming)
140mA
When alarm is
sounding
Number of
sensors
2
Supports 2 LPG
sensors
Dimensions
70 x 40
x115
(W) x (D) x (H)
9
3. Installation
You will need a small flat head screwdriver and
some cable to install your alarm.
Power Supply
•The power supplied must come from the vessel’s
Master Switch in order to activate the Gas Alarm
whenever the power is on.
•The Twin Channel Gas Alarm will work on a 12V
or 24V supply.
Suitable Installation Locations
•The main unit should be in a location where the
alarm is audible and the LEDs can be seen. It must
be protected from the elements and the
ventilation holes should not be covered up.
•The LPG sensors should be mounted as low as
possible in a position where they will remain dry –
near gas appliances at floor level or just
underneath floorboards is ideal.
•There are cable routing and mounting holes on the
rear and bottom of the unit casing.
10
3.1 Wiring
•Using the wiring diagram on page 11, start from
pin 1 and work your way along the terminal
block inserting the wires into the block.
•Wires are secured using a flat head screwdriver.
•To avoid confusion, use wire colours that match
the colours in the wiring diagram.
•Be sure to wire the cables through the cable
routing holes on the bottom of the case before
attaching them to the terminal block.
WARNING
Disconnect the power supply before proceeding
11
3.2 Pin Definitions
1. Positive power supply
2. Negative power supply (Common Ground)
3. Sensor 1 Positive
4. Sensor 1 Negative
5. Sensor 1 Signal
6. Sensor 2 Positive
7. Sensor 2 Negative
8. Sensor 2 Signal
9. Not Used
10. Not Used
11. Not Used
Wiring Diagram
12
4. Initialisation & Testing
This section will explain how the unit functions,
what the initialization procedure is and how to
test your device.
4.1 Initialisation
The initialisation process will occur every time
your Twin Channel Gas Alarm is powered on. The
green LED will illuminate, and the red LED will
flash every second alongside a beeping sound.
During this time the unit will check for attached
sensors and start the initialisation process. The
initialisation process can take up to 8 minutes,
however the beeping will be silenced after 30
seconds.
When a channel (sensor) has stabilised, there will
be one long beep and the red LED will stop
flashing. There will be one long beep for each
channel when that channel’s sensor has stabilised.
13
4.2 Testing
The alarm may be tested at any time in two ways:
1. By pressing the “Test” button on the front of
your unit. This simulates the presence of
harmful gases and should immediately sound
the alarm and illuminate the red LED.
2. By allowing a small amount of lighter fluid
vapour to pass by the LPG sensors. This will
test the sensor itself.
All Twin Channel Gas Alarms and sensors are fully
tested and calibrated before leaving Envin
Scientific. It would good practice to regularly test
your gas detection system using test method 2 for
maximum safety.
14
5. Alarm
•Constant, high pitch alarm noise.
•“ALARM” LED will illuminate RED.
ACTION
In the event of an alarm ensure that nothing is
used which could ignite gas (matches, engine
ignition etc.).
Ventilate the area by opening doors and
hatches.
Vacate any interior cabins and remain outside
until the alarm stops.
If the alarm continues to sound consult the
troubleshooting section.
15
6. Troubleshooting
Symptom
Possible Cause
Action
Intermittent
Alarm
Sensor may have
become
disconnected
Switch off supply,
check connections,
restart. Otherwise
replace the sensor
Frequent
false alarms
Contaminated
Sensor or other
gases present.
Sensor over 2
years old
Replace the sensor
Regular
beeping
(while not
initialising)
or Fault
light is lit
Low supply
voltage
Check boat power
supply
Alarm after
initialisation
or failure to
initialise
Sensor has
become
disconnected or
has reached end
of life
Check connections
or replace sensor
16
If your issue is not listed here, please use the
contact details on the back of this manual to
contact the manufacturer/supplier.
7. Sensor Replacement
We recommend that you replace your sensors
every 2 years as their sensitivity can change over
time.
To replace the LPG sensors:
1. Switch off the power supply
2. Remove the top cap from the sensor housing
3. Remove the sensor from the housing
4. Gently insert the new sensor into the housing
and replace the sensor cap.
5. Switch the power on
Replacement sensors are available on the Envin
Scientific website –www.envinsci.co.uk/envin-
shop/ ,Or through a Pilot supplier.
17
8. Warnings
DO NOT:
Expose sensors to silicone vapours, alkaline
metals or a highly corrosive environment
Use cleaning products around the sensors
Allow the sensors to become damp or wet
Expose the sensors to extreme temperatures
(below 0°C or above 60°C)
Handle sensors or unit internals while
powered up
Connect more than the max. number of
sensors to the unit
DO:
✓Replace the sensors after the recommended 2
year period
✓Test the alarm regularly
✓Place the sensors into a clean sealable bag if
the boat is to be out of use for long periods of
time or if it is to undergo any maintenance
work
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