ARJAY ENGINEERING GasAlert II User manual

MODEL:
GasAlert II
SINGLE ZONE GAS MONITOR
USER MANUAL
(
REV: 0.1
)
ARJAY ENGINEERING
2851 Brighton Road
Oakville (Toronto), Canada
L6H 6C9
TEL: ++1 [phone]
FAX: ++1 [phone]
NORTH AMERICA: 1-800-387-
9487
WEBSITE: ArjayGasDetection.com
EMAIL: [e-mail]

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TABLE OF CONTENT
NOTICE Please read the Installation Notes (4.0) prior to locating and mounting
the instrument.
1.0 SPECIFICATION .................................................................................................... 4
2.0 USE HAZARD INFORMATION............................................................................... 6
3.0 INSTRUMENT OVERVIEW..................................................................................... 7
3.1 Features ............................................................................................................................... 7
3.2 Model Number Table ............................................................................................................ 7
4.0 INSTALLATION...................................................................................................... 9
4.1 Controller Installation ............................................................................................................ 9
4.2 Sensor Installation .............................................................................................................. 10
5.0 CONTROLLER OVERVIEW ................................................................................. 11
5.1 Input / Output Terminal Specification ................................................................................. 12
5.2 AC Power Supply (if ordered with equipment) .................................................................... 13
5.3 Glossary Of Symbols .......................................................................................................... 13
6.0 STARTUP ............................................................................................................. 14
6.1 Startup ................................................................................................................................ 14
6.2 Menu Flow Chart Background Information ......................................................................... 15
6.2.1 Menu Description ................................................................................................................ 15
6.2.2 Data Entry ........................................................................................................................... 15
6.3 GasAlert Controller Setup ................................................................................................... 15
6.3.1 Setup and Network ............................................................................................................. 15
7.0 CONTROLLER NETWORK .................................................................................. 17
7.1 MODBUS Configuration ..................................................................................................... 17
7.2 GasAlert II MODBUS Register Mapping ............................................................................. 17
8.0 MAINTENANCE.................................................................................................... 18
9.0 TROUBLESHOOTING.......................................................................................... 19
10.0 FLOW CHARTS.................................................................................................... 20
10.1 Normal Operation Menu Flow Chart ................................................................................... 20
TABLE OF FIGURES
FIGURE 1 – INSTRUMENT OVERVIEW – P/N: E90854..................................................... 8
FIGURE 2 – INSTRUMENT OVERVIEW -– P/N: E90855 ................................................... 8
FIGURE 3 – TYPICAL INSTALLATION OVERVIEW ........................................................ 10
FIGURE 4 – CONTROLLER OVERVIEW.......................................................................... 11
FIGURE 5 – USER INTERFACE OVERVIEW ................................................................... 14

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1.0 SPECIFICATION
Specifications are subject to change without notice
Specification Details
Power Input:
Controller
Optional 24VDC 3.2A Power
Supply (Part# E90680)
(mounted separate form
controller)
24VDC, 200mA maximum
Required extra current for external EC-Gold transmiters.
100VAC – 240VAC +/- 10%, 50/60 Hz, 2A maximum
Note: DC input models must be supplied by Limited Energy power source.
Limited Energy means compliance with one of the following requirements:
- Class 2 circuit according to Canadian Electrical Code, Part, I, C22.1;
- Class 2 circuit according to National Electrical Code, NFPA-70;
- Limited Power Supply (LPS) according to IEC 60950-1;
- Limited-energy circuit according to IEC 61010-1.
User Interface:
Display & Keypad
Push-Test
Two line LCD display, Alarm status LEDs and Keypad for select
menu or enter values
Pushbutton and Keypad
Network Modbus (RS485) protocol
Outputs
Relay Outputs 3 SPDT relays for High, High and Low alarms, Dry Contacts are
3A @ 250 VAC (Resistive), selectable failsafe or non-failsafe
Alarm Indication High (Red), Low (Yellow) and a 2 color LED for Sensor Fault
(Red) & No Alarm (Green).
Time Delay Adjustable /Independent 7200 seconds time delay to On and
Delay to Off for High and Low alarms and on board buzzer
Inputs
RLU DVO Input (TB3) When EC-Gold sensor configured for Discrete Voltage output
mode:
0V = No Alarm; 1.8V = Low Alarm; 2.8V = High Alarm

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Specification Details
Environmental:
Operating conditions Continuous, indoor use
Ambient Temperature -20 °C to +55 °C controller
Relative humidity 90% max. with non-condensation
Altitude ≤2000 m
Installation Category II
Pollution Degree 2
Equipment mobility Fixed
Mechanical Specification: Refer to Dimensional Drawing
Protection Degree of
Controller Enclosure
Type 1 Wall Mount
Type 4x / IP66 Polycarbonate (Gray)
Audio Buzzer Board level audible alarm (86db @ 30cm) with keypad silence
Optional door mounted buzzer (97db @ 61cm) on type 4x
enclosure

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2.0 USE HAZARD INFORMATION
CAUTION Indicates a potentially hazardous situation that may result in minor or
moderate in
j
ur
y.
WARNING Indicates a potentially or imminently hazardous situation which, if not
avoided, could result in death or serious in
j
ur
y.
DANGER Indicates a potentially or imminently hazardous situation which, if not
avoided, will result in death or serious in
j
ur
y.
NOTICE Indicates a situation which, if not avoided, may cause damage to the
instrument. Information that requires special emphasis
.

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3.0 INSTRUMENT OVERVIEW
The GasAlert II gas detector control panel monitors a field of EC-Gold sensors for common alarms
and relays.
This system is ideal for single zone areas where one or more sensors or gas types are required to
control a set of ventilation fans or interlocks to a Building Automation System (BAS).
The unique Discrete Voltage Output (DVO) signal from the EC-Gold sensors allow for one common
3-conductor wire from the controller to serve all sensors. This simplifies wiring by not requiring
dedicated ‘home’ runs or communication cabling and addressing.
The control panel will typically mount near the fan motor starters or in a mechanical room and has
one Low alarm relay and two High alarm relays. One of these high relays is typically used for a
remote audio or visual alarm.
There are 3 on board relays and outputs available to communicate with remote devices such as
alarms, fans and building automation systems.
The GasAlert II provides 3 relays, and an RS-485 interface. An LCD display of Alarm level, buzzer
with silence, and keypad interface.
The relays are common to all sensors and are set to ppm or % LEL values specific and proper for
each sensor type.
The LCD display will provide an indication of normal, low or high alarm condition.
3.1 Features
x Microprocessor based controller
x Three Alarm relays (SPDT, 3A @ 250VAC), one for low alarm, two for high alarm
x Modbus protocol via RS-485 to communication to a BAS system
x On-board Audio alarm with keypad silence
x Optional Door mounted Audio alarm with cover-to-mute (only offered with Type 4x enclosure)
x Gas Monitor for variety of gas EC-Gold sensors
x Can Monitor up to 32 EC-Gold sensors on one zone.
x Carbon Monoxide sensor has expected life of 5 years min. (3 year guarantee)
x Other sensors have expected life of 2 years (1 year guarantee)
x Input requires Arjay’s Discrete Voltage Output (DVO) of EC-Gold sensors
x Convenient keypad test of alarm levels
x Push-test feature: On demand using the push to test pushbutton
x High and Low alarm and second High Alarm for buzzer
x High and Low alarm levels based on each EC-Gold sensor’s alarm level
x Use specified custom features might be added by contacting Arjay Engineering
3.2 Model Number Table
Part # DESCRIPTION
E90854 wall mount standard Type 1 metal housing, 24 vdc power input
E90855 wall mount standard Type 4 polycarbonate housing, 24 vdc power input
E90680 80-240vac to 24vdc power supply, serves controller and up to 32 EC-Gold sensors

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Figure 1 – INSTRUMENT OVERVIEW – P/N: E90854
Figure 2 – INSTRUMENT OVERVIEW -– P/N: E90855

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4.0 INSTALLATION
NOTICE If any damage to the instrument is found, please notify an Arjay
Engineering representative as soon as possible prior to installation.
NOTICE Qualified Personnel must undertake all installations.
WARNING If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
4.1 Controller Installation
Choose a mounting location in accordance with good instrument practice. Extremes of ambient
temperature and vibration should be avoided (see specifications and installation drawing). Locate
the GasAlert II on a vertical surface away from drafts, open doors or windows, condensation or
dripping moisture.
Check the polarity of the 24VDC + and - wiring between the controller and the sensors prior to
powering on the unit; + to + and - to - to avoid damage.
NOTICE
Failsafe Mode (Optional – Contact Factory)
This means that the relays are in an energized state during normal operation.
The N.O. relay contact will be held closed and the N.C. relay contact will be
held open during a normal condition. This will allow the relay to return to its
non-energized (shelf) state during an alarm, fault or power failure condition.
Wire accordingly.
Note: the bank of LEDS indicates the status of the relay energized or de-
energized condition. As such, when in FailSafe mode, the relay LEDS will be
ON during a normal condition.
CAUTION
THE UNIT HOUSES SENSITIVE ELECTRONIC COMPONENTS AND
SHOULD BE HANDLED WITH CARE. IF PUNCHING OR DRILLING
THROUGH THE ENCLOSURE WALLS IS NECESSARY MAKE SURE
THAT THE INTERNAL ELECTRONIC MODULES ARE SHIELDED FROM
DEBRIS ESPECIALLY METAL PARTICLES.
PLEASE MAKE SURE THAT THE CONNECTIONS HAVE THE POLARITY
AS INDICATED OR THE CONTROLLER MAY BE DAMAGED.
USE GOOD INSTALLATION PRACTICE! DO NOT RUN HIGH VOLTAGE
CABLE IN THE SAME CONDUIT AS SIGNAL WIRES

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4.2 Sensor Installation
NOTICE Read the following information before installation.
Read the operation manual that accompanies the sensor transmitter being used with this controller.
Be sure to note that this controller requires a DVO (digital voltage output) from the sensor transmitters.
The typical sensor models used with this controller are the Arjay EC-Gold, EC-Gold II and the EC-
Gold Dual.
NOTICE Install the sensors with care. Protect the sensors from water or dust,
especially if installed during a building construction phase.
Figure 3 – TYPICAL INSTALLATION OVERVIEW

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5.0 CONTROLLER OVERVIEW
See specific drawing(s) attached to this manual for more detail
Figure 4 – CONTROLLER OVERVIEW
TB1 – Pin 1 (+) and 2 (-) Power Input
TB2 – Relay Output
3 SPDT relay, Dry Contacts are 3A @ 250 VAC (Resistive), selectable failsafe or non-failsafe,
programmable time delay: 0 – 7200 seconds,
NOTICE The controller relays are factory set in a Failsafe mode.
TB3 - Signal Input
Signal Input - Pin 2
TB1 – Pin 4 and 5 Network Output
Connect RS485 + and – to the network - Pin 4 (D+) and Pin 5 (D-)
TB4 – Not Used

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5.1 Input / Output Terminal Specification
Input Terminals – Power Source
Terminal
ID
Overvoltage
category
Rated Voltage
(V)
Rated
Current/power
(A/W/VA)
___ HZ or
DC
Specified
Mains
fluctuation
TB1
(1 & 2) II 24V 200mA DC
 15%
 10%
Input Terminals – Measuring Circuits
Terminal
ID Function Measurement
Category
Nominal a.c. or
d.c line to
neutral voltage
/ if CAT I, Max.
transient
overvoltage Ut
Nominal
a.c. or d.c
current
Rating of
insulation
required for
external
circuit
TB1
(5 & 6)
RS485
Communication I 5V, 5mA / 0 -- DI * or RI**
TB3 (2) Signal Input -- --
* Double Insulation
**Reinforced Insulation
Output Terminals
Terminal
ID Function Isolation or protection Rated V, A Max. V, A Load type and nominal
TB2 Load Relays 3A Contact
@250VAC -- --

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5.2 AC Power Supply (if ordered with equipment)
1) Connection to the building wiring system shall be in accordance with the Canadian Electrical
Code (CEC), Part 1 in Canada, the National Electrical Code, ANSI/NFPA 70 in the USA, or the
local electrical codes of the country where the equipment is being installed.
2) A disconnecting device is required. The disconnecting means shall disconnect all current-
carrying conductors.
3) 15A circuit breaker or equivalent fuse is required.
4) An external switch or breaker shall be in close proximity to the equipment and within easy reach
of the operator. The switch shall be marked as the disconnecting device for the equipment and
include the symbols to its “ON” and “OFF” positions using the following symbols:
Power
Off
Power
On
5) The wiring for AC power should be minimum 18 AWG / 300V or as required by local / country
codes.
6) After field wiring, the primary wires must be secured to the enclosure by tie-wraps to maintain
the separation from the signal wires.
7) Wiring diagram for permanent connection: See drawings at the back of this manual.
8) Use copper conductors only.
5.3 Glossary Of Symbols
Attention, consult accompanying documents
Attention, veuillez consulter les documents ci-joints.
Primary Protective Earth Ground
Primaire de terre de protection
Fuse
Coupe-circuit; fusible
Secondary Earth Ground
Mise à la terre de secondaire
Normally open relay contacts
Contacts travail
Direct Current (DC)
Courant continu
Power off
ArróÕ (mise hors tension)
Normally closed relay contacts
Contacts Repos LLive Sous tension
Power on
Marche (mise sous tension) GGround Terre
NNeutral
Neutre

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6.0 STARTUP
6.1 Startup
Check that the power wiring, sensor wiring and interlocks are wired in accordance with the electrical
installation drawing.
The controller menu allows the user to set up certain alarm operating parameters. These are
described below or see section 10.0 Menu Flow Chart.
NOTICE
The GasAlert II controller provides common relay alarms for a field of
sensors. There is no calibration required at the controller. Refer to the
specific sensor manuals for sensor calibration.
Figure 5 – USER INTERFACE OVERVIEW

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6.2 Menu Flow Chart Background Information
The controller setup is accessed using the display and keypad on the controller. The Flow Chart in
Section 10.0 provides an overview to the various menus and features. Keep a copy of the flow
chart at hand when accessing the internal controller features.
Below is a description of the menu functions.
6.2.1 Menu Description
The GasAlert II controller will display Normal in its normal operating condition and LO Alarm or HI
Alarm during a gas alarm condition.
The controller has a password protect feature for changing alarm parameters. The default password
is 2000.
6.2.2 Data Entry
Data Entry
Press < > / < > key to increase / decrease the digital value.
Press <SELECT> key to move the cursor.
Press <MENU> key to abort certain screens.
6.3 GasAlert Controller Setup
Power up the Controller. The status LED should be green. The LCD will scroll to the normal
operating screen after a series of the following screens (each displays for 2 sec.) and a 10 second
countdown..
Arjay
GasAlert
SW X.XXX
HW X.X
NETID: X Warm Up
X
GasAlert
Normal
6.3.1 Setup and Network
Since the GasAlert receives it’s alarm signals from the field of sensors, there is minimal setup at at
the controller.
The user can:
- Test alarm Relays
- set Time Delay ON and OFF on the relays
- set Time Delay ON on the onboard buzzer
- enable or disable the onboard buzzer
To enter the SETUP menus, press and hold the MENU key. The display will request a Password.
The unit is shipped with password “2000”. Use the < > key to display “2”. Then press SELECT
repeatedly to move the cursor until SETUP is displayed.
There are four menus to toggle through using the < > key.
Menu 1: Alarm Test
This menu lets the user Test the relays, Press <Select> key and low alarm relay will energize.
Press <Select> key again and both High alarm relays will energize plus buzzer.
When using the push to test on keypad the time delay is bypassed. If using the push to test on the
circuit board (SW2) then the time is present

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Menu 2: Setup Alarm delay
Alarm Delay
Each relay can be delayed ON and OFF when a gas alarm is indicated.
Typically, Delay ON is prescribed to avoid a spurious activation of a fan or alarm due to a minor puff
of gas.
DELAY OFF is prescribed to keep fans operating after the sensor indicates a normal level. This is
to ensure nooks or other areas of the garage have a chance to clear as well.
To set or change the delay times of the relays, enter the SETUP menu and use the < > arrow key
to display SETUP Alrm Del. Press SELECT. SELECT K1 (Low) or toggle to K2 (HI1) or K3 (HI2) &
buzzer. Follow the prompts to enter Delay ON and Delay OFF (Max 7200 seconds)
Menu 3: Buzzer
The display will now indicate if the onboard buzzer is Enabled or Disabled. Press SELECT to
change and use the < > Use the arrow key to toggle from Enable? or Disable? and then press
SELECT to choose.
Menu 4 Setup NET ID
The ID number is used only for network applications where multiple GasAlert controllers would be
daisy-changed together to communicate to a master controller or Building Automation System.
To communicate on a network, each controller must have a unique ID number. The factory default
ID number is 1. To change the address number, reach the SETUP Alarms display and toggle down
to SETUP NetID. Press SELECT key and use the arrow keys and SELECT keys to enter a new
address.
NOTICE If multiple units on a network have the same address, network errors
will result.
Menu 5 Exit
Press the < > key to scroll through the menu items again or SELECT to exit the menus and return
to the operating screen.
f there is any issue, call Arjay Engineering Ltd.: Toll free: [phone] (North America Only), tel.
[phone].
This completes the setup for the GasALert II Control Panel

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7.0 CONTROLLER NETWORK
The GasAlert II Controller can be accessed using the RS-485 protocol compatible digital
communication.
Typical features are:
1. Ease of wiring in multiple level point monitoring:
Up to 254 GasAler II t controllers may be connected together in a daisy chain (2 wire
communication plus power wiring) connection to an Arjay Remote Access monitor or customer
control system which allows viewing data and setup of any of the transmitters on the network. The
relay and analog outputs may still be used if necessary.
2. Setup for the GasAlert II network operation:
Each GasAlert II controller must have a unique ID number to connect in a network system. See
section 10.0 Flow Chart for more detail.
7.1 MODBUS Configuration
Parameter settings: 9600 Baud Rate; Even Parity, 8 Data Bits and 1 Stop Bit.
Wiring connection: RS485 (+) connect to D+; RS485 (-) connect to D-.
See section 7.2 for Modbus Register mapping.
7.2 GasAlert II MODBUS Register Mapping
REG DESCRIPTION TYPE
No. of
Reg Read/write
40001 Serial Number 0000 int 1
40002 Hardware Rev / Software Rev 0002 byte 1
40003 Instrument status / Mode byte 0004 1
40004 mA Output Link / Node Address 0006 1
40005 Spare / Alarm failsafe or non-failsafe mode 0008 1
40006 Delay On Relay 1 000A int 1
40007 Delay On Relay 2 000C 1
40008 Delay On Relay 3 000E 1
40009 Delay On Buzzer 0010 1
40010 Delay Off Relay 1 0012 1
40011 Delay Off Relay 2 0014 1
40012 Delay Off Relay 3 0016 1
40013 Output trim slope (Factory use only) 0018 2
40015 Output trim offset (Factory use only) 001C 2
40017 High High Alarm set value 0020 2
40019 High Alarm set value 0024 2
40021 Low Alarm set value 0028 2

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8.0 MAINTENANCE
There is no routine cleaning required for this controller.

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9.0 TROUBLESHOOTING
CONDITION DO THIS
1. No Output and all lights off x Check the power to the unit. The voltage should be
24VDC at the power connector with the positive and
negative connected as shown on the connector
label.
x Make sure JP1 is in place for DC voltage
x If the Power checks out, call Arjay Service.
2. Gas Alert II is in Alarm but ECGold
sensor is normal
x Make sure that the EC-Gold output mode is set to
Discrete Voltage Output mode and not to Analog.
1. False Alarms x Add some time delay in the unit
ARJAY ENGINEERING TECHNICAL SUPPORT
[phone]
[phone]
www.arjayeng.com

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10.0 FLOW CHARTS
10.1 Normal Operation Menu Flow Chart
GasAlert
Normal
SETUP
Buzzer
SETUP
Net ID
SETUP
Exit
SETUP
Alrm Del
SETUP
Alm Test
Lo Alarm
Test
Hi Alarm
Test
Relay:
K1
K1 Delay
On=_ _ _ 0
K1 Delay
Off=_ _ _ 0
Relay:
K2
K2 Delay
On=_ _ _ 0
Relay:
K3
K3 Delay
On=_ _ _ 0
K3 Delay
Off=_ _ _ 0
Relay:
Buzzer
Buzzer
On=_ _ _ 0
Relay:
Exit
Buzzer
Enabled
Buzzer
Disabled
NET ID
_ _ 1
Press <SELECT>
Press <SELECT>
K1 Delay
Off=_ _ _ 0
Press <SELECT>
Press <SELECT>
Press <SELECT>
Press <SELECT>
Press <SELECT>
Press <>
<>
Press
Press <>
<>
Press
Press <>
<>
Press
Press <>
<>
Press
Press <SELECT>
Press <SELECT>
Press
< >
<>
Press
< >
<>
Press
< >
<>
Press
<>
<>
Press
Press < >
<>
Press <SELECT>
Press <SELECT>
Press
< > Press
< >
Press <SELECT>
Press <SELECT>
Press <SELECT>
Press
Press < >
<>
Default Password: 2000
Note:
Press <SELECT> to move cursor;
Press < > / < > to increase / decrease the value.
See
Note
See
Note
See
Note
See
Note
See
Note
See
Note
See
Note
Press <SELECT>
Press <SELECT>
See
Note
Press
<SELECT>
Press <SELECT>
Press <SELECT> Press <SELECT>
Press <SELECT>