Macurco™ GD-6
Combustible Gas Detector, Controller and Transducer
User Instructions
Important: Keep these User Instructions for reference
TABLE OF CONTENTS
GENERAL SAFETY INFORMATION 3
List of Warnings and Cautions 3
USE INSTRUCTIONS AND LIMITATIONS 4
Use For 4
Do Not Use For 4
General Description 4
INSTALLATION AND OPERATING INST RUCTIONS 5
MAINTENANCE 12
End-of-Life Signal 14
Testing 15
MACURCO GAS DETECTION PRODUCTS WARRANT Y 21
Intended Use 3
Features 5
Specifications 5
Location 6
Installation 6
Power Up 10
Operation 10
Default - Factory Settings 10
On Board Diagnostics 13
Sensor Poisons 14
Sensor Life Reset 14
Cleaning 14
Field Calibration Procedure 20
Garage diagram 7
4-20 mA Output diagram 7
Multiple Device diagram 8
Alarm Control Panel diagram 8
DVP-120 Control Panel diagram 9
Alternate Alarm Panel 10
Display setting 11
Buzzer setting 12
Alarm Relay setting 12
Alarm Relay Configuration 12
Fan Relay setting 12
Fan Relay Delay setting 12
Fan Minimum Runtime setting 13
Fan Relay Latching setting 13
Trouble Fan Setting 13
4-20mA Output setting 13
Operation Test 16
Gas Test 17
Quick Gas Test 17
2
GENERAL SAFETY INFORMATION
Intended Use
The Macurco GD-6 is a low voltage, dual relay Combustible Gas detector, controller and transducer. The GD-6 has selectable 4-20 mA
output, buzzer and digital display options. It is an electronic detection system used to measure the concentration of Combustible Gas
and provide feedback and automatic exhaust fan, louver or valve control to help reduce gas concentrations in parking garages, battery
rooms or other commercial applications. The GD-6 is a versatile, easy-to-use device that allows you to select between methane,
propane or hydrogen gas detection. It provides low-level detection of combustible gas in an easy-to-maintain monitor that is factory
calibrated for simple installation. The GD-6 is capable of displaying from 0-50% LEL (Lower Explosive Limit) of Combustible Gas. The
GD-6 is factory calibrated and 100% tested for proper operation, but can also be calibrated in the field.
List of Warnings and Cautions within these User Instructions
Each person using this equipment must read and understand the information in these User Instructions before use. Use of this
equipment by untrained or unqualified persons, or use that is not in accordance with these User Instructions, may adversely affect
product performance and result in sickness or death.
Use only for monitoring the gas which the sensor and instrument are designed to monitor. Failure to do so may result in exposures
to gases not detectable and cause sickness or death. For proper use, see supervisor or User Instructions, or call Technical
Service at 1-877-367-7891.
This equipment may not function effectively below 0F or above 125F (-18C or above 52C). Using the detector outside of this
temperature range may adversely affect product performance and result in sickness or death.
This detector helps monitor for the presence and concentration level of a certain specified airborne gas. Misuse may produce an
inaccurate reading, which means that higher levels of the gas being monitored may be present and could result in overexposure
and cause sickness or death. For proper use, see supervisor or User Instructions, or call Technical Service at 1-877-367-7891.
High voltage relay terminals (120/240 VAC) are located within this detector, presenting a hazard to service technicians. Only
qualified technicians should open the detector case and service the internal circuits. Ensure power is removed from the detector
relays prior to servicing the unit. Failure to do so may result in sickness or death.
Do not disassemble unit or attempt to repair or modify any component of this instrument. This instrument contains no user
serviceable parts, and substitution of components may impair product performance and result in sickness or death.
Using a certified gas with a concentration other than the one listed for this detector when conducting a calibration or calibration
verification test (bump test) will produce inaccurate readings. This means that higher levels of the gas being monitored may be
present and could result in overexposure and cause sickness or death. For proper use, see supervisor or User Instructions, or
call Technical Service at 1-877-367-7891
The following steps must be performed when conducting a calibration or calibration verification test (bump test) to ensure proper
performance of the monitor. Failure to do so may adversely affect product performance and result in sickness or death.
When performing a calibration or calibration verification test (bump test) only use certified calibration gas at the required
concentration level. Do not calibrate with expired calibration gas.
If the instrument cannot be calibrated, do not use until the reason can be determined and corrected.
Do not cover or obstruct display or visual alarm cover.
Ensure sensor inlets are unobstructed and is free of debris
! WARNING
3
USE INSTRUCTIONS AND LIMITATIONS
Each person using this equipment must read and understand the information in these User Instructions before use. Use of this
equipment by untrained or unqualified persons, or use that is not in accordance with these User Instructions, may adversely affect
product performance and result in sickness or death.
NOTE: Combustible gas detectors will respond to a wide range of hydrocarbons, including aerosol sprays, cleaning solvents, paint
thinner and other common household items. Be alert to other hydrocarbons near the detector before assuming that the unit is false
alarming or is defective.
Use For
The GD-6 provides combustible gas detection and automatic exhaust fan, louver or valve control for automotive maintenance facilities,
enclosed parking garages, utility rooms, battery rooms, warehouses with forklifts and other commercial applications. The GD-6 can be
used stand alone, with the Macurco DVP-120 Detection and Ventilation Control Panel, other 12 VAC or 24 VDC fire/security panels or
building automation systems.
Use only for monitoring the gas which the sensor and instrument are designed to monitor. Failure to do so may result in exposures to
gases not detectable and cause sickness or death. For proper use, see supervisor or User Instructions, or call Macurco Technical
Service at 1-877-367-7891.
Do Not Use For
The GD-6 is not intended for use in hazardous locations or industrial applications such as refineries, chemical plants, etc. Do not mount
the GD-6 where the normal ambient temperature is below 0°F or exceeds 125°F (-18C or above 52C). The GD-6 mounts on a type
4S electrical box supplied by the contractor. Do not install the GD-6 inside another box unless it has good air flow through it.
This equipment may not function effectively below 0F or above 125F (-18C or above 52C). Using the detector outside of this
temperature range may adversely affect product performance and result in sickness or death.
General Description
The GD-6 is a low voltage, dual relay combustible gas detector and automatic ventilation controller. The GD-6 uses a microcomputer
controlled, electronic system to measure the concentration of combustible gas, actuate relays and provide a 4-20 mA output. The GD-6
has a low maintenance long life (5+ years) pellistor sensor and optional gas test and calibration kits. The GD-6 is a low level meter
capable of displaying from 0-50% LEL of combustible gas.
! WARNING
! WARNING
! WARNING
4
Features
ETL Listed to UL 61010-1 and CAN/CSA C22.2 No 61010-1
Low level meter capable of displaying from 0-50% LEL
Selectable target gas – Methane(NG), Propane(LP) or Hydrogen(H2)
Selectable fan and alarm relay activation
5 A SPDT fan relay controls starters of exhaust fans
0.5 A N.O. or N.C. alarm relay connects to warning devices or control panels
4-20 mA current loop
GD-6 mounts on a standard 4x4 electrical box and becomes cover for the box
Supervised system: any internal detector problem will cause the fan & alarm relay to activate
Calibration kit is available. One screw allows access for calibration or gas test
Specifications
Power: 3 W (max) from 12 to 24 VAC or 12 to 48 VDC
Current @ 24VDC: 75 mA in alarm (two relays), 50 mA (fan relay only) and 23 mA stand by
Shipping Weight: 1 pound (0.45 kg)
Size: 4 1/2 x 4 x 2 1/8 in. (11.4 X 11.4 X 5.3 cm)
Color: Dark gray
Connections: plugs/terminals
Mounting box: (not included) 4x4 electric
Fan relay: 5 A, 240 VAC, pilot duty, SPDT, latching or non-latching
Fan relay actuation: selectable at diS (disable) 3, 4, 5, 6, 7, 8, 9, 10 (default), 11, 12, 13, 14, 15, 16, 17, 18, 19, 20%
LEL
Fan Delay Settings of 0, 1, 3 (default), 5 and 10 minutes
Fan Minimum Run Time settings are 0 (default), 3, 5, 10 or 15 minutes
Fan relay latching or not latching (default) selectable
Alarm relay: 0.5A 120 V, 60 VA
Alarm relay actuation: selectable N.O. default or N.C.
Alarm relay settings: diS, 5, 10, 15, 20 (default), 25% LEL
Current loop, 4-20 mA for 0-50% LEL, selectable to off or on (default)
Buzzer: 85 dBA at 10cm settable to off (default) or on
Digital display: 3 digit LED selectable to off (default) or on.
Operating environ: 0°F to 125°F (-18C to 52C).10 to 90% RH
INSTALLATION AND OPERATING INSTRUCTIONS
The following instructions are intended to serve as a guideline for the use of the Macurco GD-6 Combustible Gas Detector. It is not to
be considered all-inclusive, nor is it intended to replace the policy and procedures for each facility. If you have any doubts about the
applicability of the equipment to your situation, consult an industrial hygienist or call Technical Service at 1-877-367-7891.
5
This detector helps monitor for the presence and concentration level of a certain specified airborne gas. Misuse may produce an
inaccurate reading, which means that higher levels of the gas being monitored may be present and could result in overexposure and
cause sickness or death. For proper use, see supervisor or User Instructions, or call Technical Service at 1-877-367-7891.
Location
A GD-6 mounting height is dependent upon the target gas.
If the target gas is lighter than air; methane (NG) or Hydrogen (H2), mount the GD-6 high on a wall or column (about one foot
down from the ceiling) in a central area where air movement is generally good.
If the target gas is heavier than air; propane (LP), mount the GD-6 low on a wall or column (about one foot above the floor) in a
central area where air movement is generally good.
The unit, on average, can cover about 900 sq. ft. (84 sq. meters). The coverage depends on air movement within the room or facility.
Extra detectors may be needed near any areas where people work or where the air is stagnant. Do NOT mount the GD-6 where the
normal ambient temperature is below below 0°F or exceeds 125°F (below -18C or above 52C).
High voltage relay terminals (120/240 VAC) are located within this detector, presenting a hazard to service technicians. Only qualified
technicians should open the detector case and service the internal circuits. Ensure power is removed from the detector relays prior to
servicing the unit. Failure to do so may result in sickness or death.
Installation
1. The GD-6 mounts on a 4” square (or 4x4) electrical box supplied by the contractor. Do not mount the GD-6 inside another box,
unless it has good air flow through it.
2. Connect the GD-6 to Class 2 power supply only. It is suggested to use a separate transformer for powering the unit or units
because of possible interference’s from other devices on the same power supply.
3. Connect the GD-6 to the control cables with terminal plugs. When making connections, make sure the power is off.
4. There are two terminals for Power: 12 to 24 VAC or 12 to 48 VDC, with no polarity preference.
5. There are two terminals for the dry alarm relay contacts, again with no polarity preference. The alarm relay can switch up to 0.5
A 120 V, or 60 VA. The alarm relay is activated if gas reaches or exceeds the alarm settings. See OPERATION section of
these User Instructions for details on relay settings.
6. The alarm relay can be configured to normally open (default) (N.O.) or normally closed (N.C.) and will activate if the gas
concentration exceeds alarm set point. It will deactivate once the gas concentration drops below the alarm set point. Note that
the “disable” setting will cause the alarm relay not to engage at all.
7. The dry contact, SPDT fan relay has three terminals. The common (COM.), normally open (N.O.) and the normally closed
(N.C.) contact. The fan relay can switch up to 5.0 A up to 240 VAC. See OPERATION section of these User Instructions for
details on relay settings.
! WARNING
! WARNING
6
8. The Fan Relay can be configured for latching or non-latching (default) when activated (when the gas concentration exceeds fan
relay set point). Once latched in, power will need to be interrupted or the “TEST” button pressed to un-latch the relay condition.
9. The Fan Relay will engage if the fan setting Combustible Gas concentration is exceeded for longer than the Fan Relay Delay
time. Unless it is configured for latching, the fan relay will disengage once both of these conditions have been met:
Combustible Gas concentration has dropped below fan setting
Fan Relay Run time has been exceeded
Note that the “disable” fan setting will cause the fan relay to not engage. The fan relay will engage in trouble fault condition (if
the Trouble Fan Setting Option is set to “ON”) and will disengage once trouble fault condition is cleared.
10. The Current Loop is 4 mA in clean air and 4-20 mA for 0-50% LEL
7
8
9
Power Up
The GD-6 cycles through an internal self-test cycle for the first minute that it is powered. The unit will execute the test cyc le any time
power is dropped and reapplied (i.e. power failure). During the self-test cycle the unit will display the firmware version number, then
count down from 60 to 0 (if the display setting is “On”) and finally go into normal operation. The alarm relay will be activated for 10
seconds and the fan relay for 60 seconds during the power-up cycle unless the “Power Up Test” (PUt) option is OFF. The indicator light
(LED) will flash green during the self-test cycle. At the end of the 1 minute cycle, the unit will take its first sample of the air and the
indicator light will turn solid green.
Operation
1. With the display function turned “On”, the GD-6 will show the current concentration of gas % LEL or “0” (zero) in clean air.
When the gas concentration reaches the Fan Relay setting (10% LEL, for example) the display will flash back and forth
between “FAn” and “10”. With the display function turned ”Off”, the display does not show the gas concentration, but will show
“FAn” as long as the fan relay is activated.
2. With the display function turned “On” and the gas concentration reaching the alarm relay setting, (20% LEL, for example) the
display will flash back and forth between “ALr” and “20”. The buzzer will sound indicating “Alarm” if the buzzer is turned “On”.
With the display function turned off the display does not show the gas concentration, but will show “ALr” when the Alarm relay
is activated.
3. With the 4-20 mA function turned “On”, the 4-20 mA output will correspond to the concentration (0-50% LEL). The display will
show “FAn” and “ALr” and sound as outlined above.
Default Configuration – Factory Settings
The default Gas setting is ME (methane)
The default Power Up Test setting is On
The default Display setting is Off
The default Buzzer setting is Off
The default Alarm Relay Setting is activation at 20% LEL
The default Alarm Relay Configuration is Normally Open
The default Fan Relay Setting is activation at 10% LEL
The default Fan Relay Delay setting is 3 minutes
The default Fan Relay Runtime setting is 0
The default Fan Relay Latching condition is OFF
The default Trouble Fan Setting condition is OFF
The default 4-20 mA Output setting is On
To change settings, remove the Philips screw on the front of the GD-6. Pull off the front cover of the unit.
10
Gas Selection
To select the Gas Option, in normal mode, press the Next button once to display the current gas selection (mE is Methane, Pro is
Propane and Hy is Hydrogen). Then press the Enter button twice to enter the selection menu. The currently selected gas will be
shown on the display. Press Next to scroll through the available gases selections. The selected gas will be flashing, press Enter to
select the gas and Enter again to confirm the selection. To return back to normal mode press Next until “End” is displayed and press
Enter.
Selecting Default Configuration – “dEF”
To select the Default Configuration, in normal mode, press the Next button twice to get to “Con” or the Configuration menu. Then press
the Enter button to enter the Con menu. The first selection is the “dEF” or Default setting. Press Enter. If it is already in Default
configuration, there will be no action. If it is not already in Default configuration, “nO” will be displayed. Press Next to change it to “YES”
(flashing) then press Enter to confirm the change (solid) and press Enter again to return to “dEF” in the Con menu. Press Next until
“End” is displayed then press Enter to return to normal operation.
Selecting Power Up Test Option – “PUt”
To select the Power Up Test Configuration, in normal mode, press the Next button twice to get to “Con” or the Configuration menu.
Then press the Enter button to enter the Con menu. Then press the Next button to get to the second selection “PUt” or Power Up
Test setting. Press Enter. If the test is “On” press Next to turn it “OFF” (flashing) then press Enter to confirm the change (solid) and
press Enter again to return to “PUt” in the Con menu. Press Next until “End” is displayed then press Enter to return to normal
operation.
Selecting Display Option – “dSP”
To select the Display Configuration, in normal mode, press the Next button twice to get to “Con” or the Configuration menu. Then press
the Enter button to enter the Con menu. Then press the Next button twice to get to the third selection “dSP” or Display setting. Press
Enter. If the display is “On” press Next to turn it “OFF” (flashing) then press Enter to confirm the change (solid) and press Enter again
to return to “dSP” in the Con menu. Press Next until “End” is displayed then press Enter to return to normal operation.
11
Selecting Buzzer Option – “bUZ”
To select the Buzzer Configuration, in normal mode, press the Next button twice to get to “Con” or the Configuration menu. Then press
the Enter button to enter the Con menu. The fourth selection is the “bUZ” or Buzzer setting. Press Next three times to get to “bUZ”
then press Enter. If the display is “On” press Next to turn it “OFF” (flashing) then press Enter to confirm the change (solid) and press
Enter again to return to “bUZ” in the Con menu. Press Next until “End” is displayed then press Enter to return to normal operation.
Selecting Alarm Relay Setting – “ArS”
To select the Alarm Relay Setting, in normal mode, press the Next button twice to get to “Con” or the Configuration menu. Then press
the Enter button to enter the Con menu. The fifth selection is the “ArS” or Alarm Relay Setting. Press Next four times to get to “ArS”
then press Enter. If the display is “OFF” (disabled) press Next to change it to 5, 10, 15, 20 or 25% LEL (flashing) then press Enter to
confirm the change (solid) and press Enter again to return to “ArS” in the Con menu. Press Next until “End” is displayed then press
Enter to return to normal operation.
Selecting Alarm Relay Configuration – “Arc”
To select the Alarm Relay Configuration, in normal mode, press the Next button twice to get to “Con” or the Configuration menu.
Then press the Enter button to enter the Con menu. The sixth selection is the “Arc” or Alarm Relay Configuration. Press Next five
times to get to “Arc” then press Enter. If the relay is “nO” (normally open) press Next to turn it to “nC” (flashing) then press Enter to
confirm the change (solid) and press Enter again to return to “Arc” in the Con menu. Press Next until “End” is displayed then press
Enter to return to normal operation.
Selecting Fan Relay Settings – “FrS”
To select the Fan Relay setting, in normal mode, press the Next button twice to get to “Con” or the Configuration menu. Then press the
Enter button to enter the Con menu. The seventh selection is the “FrS” or Fan Relay setting. Press Next six times to get to “FrS” then
press Enter. If the fan relay is “OFF” (disabled) press Next to change it to 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or
20% LEL (flashing) then press Enter to confirm the change (solid) and press Enter again to return to “run” in the Con menu. Press
Next until “End” is displayed then press Enter to return to normal operation.
Selecting Fan Relay Delay – “FrD”
To select the Fan Relay Delay setting, in normal mode, press the Next button twice to get to “Con” or the Configuration menu. Then
press the Enter button to enter the Con menu. The eighth selection is the “FrD” or Fan Relay Delay. Press Next seven times to get to
“FrD” then press Enter. If the delay is “OFF” (disabled) press Next to change it to 1, 3, 5, or 10 minutes (flashing) then press Enter to
confirm the change (solid) and press Enter again to return to “FrD” in the Con menu. Press Next until “End” is displayed then press
Enter to return to normal operation.
Selecting Fan Relay Run Time – “Frr”
To select the Fan Minimum Runtime setting, in normal mode, press the Next button twice to get to “Con” or the Configuration menu.
Then press the Enter button to enter the Con menu. The ninth selection is the “Frr” or Fan Minimum Run Time. Press Next eight
times to get to “Frr” then press Enter. If the runtime is “OFF” (disabled) press Next to change it to 3, 5, 10 or 15 minutes (flashing) then
press Enter to confirm the change (solid) and press Enter again to return to “run” in the Con menu. Press Next until “End” is displayed
then press Enter to return to normal operation.
12
Selecting Fan Relay Latching Option – “FrL”
To select the Fan Relay Latching Option, in normal mode, push the Next button twice to get to “Con” or the Configuration menu. Then
push the Enter button to enter the Con menu. The tenth selection is the “FrL” or Fan Relay Latching Option. Push Next nine times to
get to “FrL” then Enter. If latching is “OFF” push Next to turn it to “ON” (flashing) then push Enter to confirm the change (solid) and
push Enter again to return to “FrL” in the Con menu. Push Next until “End” is displayed then push Enter to get back to normal
operation.
Selecting Trouble Fan Setting Option – “tFS”
To select the Trouble Fan Setting Option, in normal mode, push the Next button to get to “Con” or the Configuration menu. Then
push the Enter button to enter the Con menu. The eleventh selection is the “tFS” or Trouble Fan Setting Option. Push Next ten times
to get to “tFS” then Enter. If Trouble Fan Setting is “OFF” push Next to turn it to “ON” (flashing) then push Enter to confirm the change
(solid) and push Enter again to return to “tFS” in the Con menu. Push Next until “End” is displayed then push Enter to get back to
normal operation.
Selecting 4-20mA Output Option – “420”
To select the 4-20mA Output Option, in normal mode, push the Next button to get to “Con” or the Configuration menu. Then push the
Enter button to enter the Con menu. The twelfth selection is the “420” or 4-20mA Output Option. Push Next eleven times to get to
“420” then Enter. If the 4-20mA is “On” push Next to turn it to “OFF” (flashing) then push Enter to confirm the change (solid) and push
Enter again to return to “420” in the Con menu. Push Next until “End” is displayed then push Enter to get back to normal operation.
Onboard Diagnostics
The GD-6 monitors all critical functions of the unit through software diagnostics that continuously test and verify unit operations. If a
problem is found, the unit will switch to a fail-safe/error mode or trouble condition. . In this error mode, the Alarm relay will be activated,
the 4-20 mA current loop will go to 24 mA, the unit will display the error code, the green status indicator LED light will flash and the
buzzer will chirp intermittently. The Fan relay will also engage if the Trouble Fan Setting Option is set to “ON”. This is a safety
precaution. To clear this mode, simply turn off power to the unit for a few seconds, or push the TEST switch (inside the unit). This will
cause the unit to restart the 1 minute self-test cycle.
The 4-20 mA signal can be used for troubleshooting:
0 mA is most likely a connection problem
4-20 mA is normal gas reading range (0-50% LEL)
24 mA indicates a Trouble condition
Error Codes
t01 Sensor missing
t04 EEPROM bad checksum
t08 Sensor is shorted
t10 Bad EEPROM
t20 Bad calibration
t40 Factory calibration failure
t80 Read ADC failure
t100 Under range
t200 Sensor expired
13
NOTE: For trouble codes over 080 the display will alternate between t_1 and t00 for t100 and between t_2 and t00 for t200.
If the error mode repeats frequently, check for continuous power and proper voltage. If power is not the problem and a unit has
repeating error conditions, it may need to be returned to Macurco for service, per these User Instructions.
If the error mode indicates “Sensor expired” see the Sensor Life Reset section of these User Instructions.
Sensor Poisons
The gas sensor in the detector is designed with extreme sensitivity to the environment. As a result, the sensing function may be
deteriorated if it is exposed to silicones, such as the common oil and lubricants with silicon compounds used as additives in machinery,
halogen compounds, which are used in fire extinguishers and Freon used in refrigerants, organo-metallic compounds, sulfur
compounds, chlorine compounds, acetylene, olefins or high concentrations of combustible gas.
MAINTENANCE
The GD-6 is low maintenance. The unit uses a long life pellistor sensor that has a 5+ year life expectancy. The detector’s performance
should be tested regularly by using gas as detailed in the Testing and Field Calibration sections. All other maintenance and repair of
products manufactured by Macurco are to be performed at the appropriate Macurco manufacturing facility. Macurco does not sanction
any third-party repair facilities.
End-of-life Signal
The GD-6 has a long life, non-replaceable catalytic bead sensor. Five (5) years after the GD-6 is installed the sensor end-of-life signal
will be activated indicating that the GD-6 has reached the end of its typical usable life. The end-of-life signal will cause an error code
t200 “Sensor expired”. See Error Codes section. The end-of-life signal can be silenced for 48 hours by pressing the "ENTER/TEST"
button or by temporarily dropping power to the unit. The end-of-life signal provides the user an opportunity to test and/or calibrate the
sensor assuring that it is still performing within acceptable parameters though the sensor is nearing the end of its expected life. The
silence function will continue to be available for 29 days after the GD-6 initiates the initial end-of-life signal. After this 29 day period the
GD-6 can no longer be silenced and the sensor must be calibrated and the sensor life reset or the GD-6 detector replaced.
Sensor Life Reset
1. Remove the Philips screw on the front of the GD-6. Pull the front cover of the unit off.
2. To reset the sensor life (rSt), from normal or warm-up mode, press the Next button five times to get to SEn or Sensor Mode.
3. Then press the Enter button to get to “rSt” - Reset Sensor Mode.
4. Press the Enter button again to see the sensor reset status. If the sensor life has already been reset, done “don” will be
displayed. If it has not already been reset, “no” will be displayed. Push Next to change it to “ YES” (flashing) then push Enter to
confirm the change (solid) and push Enter again to return to "rSt” in the SEn menu. Push Next until “End” is displayed then
push Enter to get back to normal operation. The sensor life will be reset for 1 year.
NOTE : If the sensor is reset and the detector not replaced it is necessary to test and/or calibrate the sensor to assure that it is still
performing within acceptable specifications though the sensor is nearing the end of its expected life. There will be no other indication of
sensor performance.
14
Do not disassemble unit or attempt to repair or modify any component of this instrument. This instrument contains no user serviceable
parts, and substitution of components may impair intrinsic safety, which may adversely affect product performance and result in
sickness or death.
CAUTION
Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such materials may permanently scratch the surfaces
and damage the display window, labels, sensor or instrument housing.
Cleaning
Cleaning of the external surfaces is best carried out using a damp cloth with a mild detergent or soap. Use a vacuum cleaner with soft
brush to remove dust or contamination under the cover. Do not blow out the sensor with compressed air.
TESTING
Using a certified gas with a concentration other than the one listed for this detector when conducting a calibration or calibration
verification test (bump test) will produce inaccurate readings. This means that higher levels of the gas being monitored may be present
and could result in overexposure and cause sickness or death. For proper use, see supervisor or User Instructions, or call Technical
Service at 1-877-367-7891
General
All GD-6 units are factory calibrated and 100% tested for proper operation. During normal operation the green status indicator LED light
will be on steady, the fan & alarm relay will be in standby mode and the 4-20 mA output will be at 4mA (in clean air).The unit also
performs a regular automatic self-test during normal operation. If the unit detects an improper voltage or inoperable component, it will
default into Error mode. In this error mode, the Alarm relay will be activated, the 4-20 mA current loop will go to 24 mA, the unit will
display the error code, the green status indicator LED light will flash and the buzzer will chirp intermittently. The Fan relay will also
engage if the Trouble Fan Setting Option is set to “ON”.
Operation Test
Check that the green GD-6 status indicator LED light is illuminated continuously. If not, do not proceed with the tests. If the unit is in
error mode contact your local representative or Macurco technical service representative for information on resolving the problem.
1. Remove the single screw in the middle of the front cover of the GD-6.
2. Remove the front cover.
3. Observe the LED light on the front of the GD-6.
4. If the light is solid green proceed to step 6.
5. If the green status indicator LED light is off or flashing, refer to the General section above.
6. Locate the switch labeled ENTER/TEST on the left side of the printed circuit board. Press the Test switch
7. The GD-6 will step through a cycle test:
once.
! WARNING
! WARNING
15
a. The display progresses through the BUZ (Buzzer Test) Art (alarm relay test), Frt (fan relay test) then
42t (4-20 mA output test). Make sure that the settings are “on” or not disabled “diS”.
b. During the first 10 seconds of the test cycle, the display will show BUZ and set off the audible buzzer
c. The alarm relay will be closed, so any devices connected to that relay will be tested.
d. The Fan relay will be activated for the next 1 minute of the test, so if the fan circuits are wired in the
normal manner, the fan should run.
e. The 4-20mA output will then ramp up from 4 to 16 mA over the next 130 seconds of the test, so if the
circuit is wired in the normal manner, the control panel or building automation system should respond.
f. At the end of the test cycle, the light will turn green and be on steady (Normal Operation), the fan &
8. When testing is completed reassemble the unit or units.
Manual Operation Test
This option gives the user the opportunity to manually initiate an individual test for each relay, the analog output and the sensor
response to gas. From normal operation mode press the Next button 3 times to get to the Test Mode (tSt). Press the Enter button once
to get into the Test Menu. Press the Next button to scroll through the four test options and press Enter to initiate the selected test. Note
that if the relay or 4–20 mA output has been disabled, the test selection will not be displayed in the test menu.
Art - Alarm Relay Test, 10 seconds
Frt - Fan Relay Test, 60 seconds
42t - 420 loop test, 25 seconds
gtS - Gas Test, 3 minutes (no output to the panel during the gas test)
The display will flash during the test or in the case of the gas test the level will alternate with the expected gas (mE, Pro or Hy). Once
the test is complete, the display will return to steady display. To exit the test menu, press the Next button until “End” is displayed, then
press Enter to return to normal mode.
Combustible Gas Gas Test
alarm relay will be in standby mode and the 4-20 mA output will return to 4 mA (in clean air).
The following steps must be performed when conducting a calibration or calibration verification test (bump test) to ensure proper
performance of the monitor. Failure to do so may adversely affect product performance and result in sickness or death.
When performing a calibration or calibration verification test (bump test) only use certified calibration gas at the
required concentration level. Do not calibrate with expired calibration gas.
If the instrument cannot be calibrated, do not use until the reason can be determined and corrected.
Do not cover or obstruct display or visual alarm cover.
Ensure sensor inlets are unobstructed and is free of debris
! WARNING
16
General
The GD-6 can be bump-tested or calibrated with the GD-6 Field Calibration Kit using Methane, Propane or Hydrogen gas, regulator and
test hood, available through your local representative or from Macurco.
Contents of the FCK
GDM-FCK: Two Gas Cylinders, 10% LEL Methane gas in air, 20% LEL Methane in air, Gas regulator with two feet of plastic
tubing, Humidifier and Gas test hood
GDP-FCK: Two Gas Cylinders, 10% LEL Propane gas in air, 20% LEL Propane in air, Gas regulator with two feet of plastic
tubing, Humidifier and Gas test hood
GDH-FCK: Two Gas Cylinders, 10% LEL Hydrogen gas in air, 20% LEL Hydrogen in air, Gas regulator with two feet of plastic
tubing, Humidifier and Gas test hood
FCK Information
Several detectors can be calibrated with one FCK. The only limitation is the amount of gas in the cylinder and the flow of the regulator.
The 34 liter cylinder for example with a 0.2LPM regulator has approximately 170 minutes of continuous calibration run time.
Replacement cylinders are available. The gas cylinder should be replaced when the pressure gauge on the regulator shows 25-psi or
less.
Note: For optimum test results it is suggested that the unit be in clean air (green light on) and be in a low ambient air flow
Gas Testing
Testing the Fan Relay
Note: The gas concentration to activate the fan relay depends on the setting.
1. Remove the Philips screw on the front of the GD-6. Remove the front cover.
2. Connect the 10% LEL cylinder of Combustible Gas to the regulator. Ensure that the gas used for calibration matches the gas
selected in the GD-6 configuration.
3. Assemble regulator, hose and test hood and place the test hood over the gas sensor.
4. Check the pressure gauge on the regulator. If you have 25-psi or less you will need to replace the gas canister.
Note: The time to activate the fan relay depends on the delay setting.
17
5. Turn on the regulator to start the gas flow and wait with the gas applied continuously.
6. With the display function turned “On”, the GD-6 will show the current concentration of gas or “0” (zero) in clean air. When the
gas concentration reaches the fan relay setting (5% LEL, for example) the display will flash back and forth between “FAn” and
“5”. With the display function turned ”Off”, the display does not show the gas concentration, but will show “FAn” as long as the
fan relay is activated.
Note: If the Fan relay does not close within 2 minutes, consider these possibilities:
a. Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25-psi or less.
b. Unit needs to be re-calibrated (go through recalibration and re-test).
c. Detector is in need of servicing (return unit to factory for servicing).
7. Remove the gas from the sensor. Proceed to test the alarm relay or replace the top cover.
Testing the Alarm Relay
Note: The gas concentration to activate the Alarm relay depends on the setting.
Connect the 20% LEL cylinder of Combustible Gas to the regulator. Ensure that the gas used for calibration matches the gas selected
in the GD-6 configuration.
1. Check the pressure gauge. If there is 25-psi or less the cylinder should be replaced.
2. Place the test hood over the gas sensor. Turn on the regulator to start the gas flow.
3. The Fan relay should activate according to the settings.
d. Detector has fan relay set to disable (OFF) or 20% LEL. Set fan relay to 5% LEL and repeat the test.
18
4. With the display function turned “On” and the gas concentration reaching the Alarm Relay setting, (20% LEL, for example) the
display will flash back and forth between “ALr” and “20”. The buzzer will sound indicating “Alarm” if the buzzer is turned “On”.
With the display function turned off the display does not show the gas concentration, but will show “ALr” when the Alarm relay
is activated.
Note: If the Alarm relay fails to operate within 2 minutes, consider these possibilities:
5. Remove the gas from the sensor after test. Proceed to test the 4-20 mA output or replace the top cover.
Testing the 4-20 mA current loop
Connect the 20% LEL cylinder of Combustible Gas to the regulator. Ensure that the gas used for calibration matches the gas selected
in the GD-6 configuration.
1. Check the pressure gauge. If there is 25-psi or less the cylinder should be replaced.
2. Place the test hood from the regulator over the gas sensor. Turn on the regulator to start the gas flow.
3. The fan relay should activate according to the settings.
4. The alarm relay should activate according to the settings.
5. The 4-20 mA output should ramp up from 4mA in clean air to 20 mA at 50% LEL. See 4-20 mA diagram in these User
6. Remove the gas from the sensor. Re-assemble the GD-6 (make sure the LED is aligned with the hole on the front of the case).
Quick Gas Test
A butane cigarette lighter can be used to perform a functionality test of the GD-6. This test allows installers to do a quick functionality
test of the gas sensor.
1. Units to be tested must be powered continuously for a minimum of 3 minutes before proceeding.
2. For optimum test results, the unit should be in clean air and be in a low ambient air flow.
3. Check that the GD-6 status indicator light is illuminated, green continuously. If not, do not proceed with tests. See GD-6
a. Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25-psi or less.
b. Unit needs to be re-calibrated (go through recalibration and re-test).
c. Detector is in need of servicing (return unit to factory for servicing).
d. Detector has Alarm relay set to disable (OFF). Set Alarm relay to 20% LEL and repeat the test.
Instructions.
Note: If the 4-20mA output does not ramp up within 2 minutes, consider these possibilities:
a. Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25-psi or less.
b. Unit needs to be re-calibrated (go through recalibration and re-test).
c. Detector is in need of servicing (return unit to factory for servicing).
d. Detector has 4-20 mA option set to “OFF”. Set 4-20 mA option to “On” and repeat the test.
Trouble Indicator section in these User Instructions.
19
4. The display option should be set to “On” and reading 0% LEL in clean air.
5. With the GD-6 cover on, aim the lighter into the sensor grate area (under “DO NOT PAINT”) on the front cover and release the
gas (without igniting the flame) for 1 second or less
6. Wait for a few seconds. The digital display should climb indicating the increased gas concentration at the sensor confirming a
pass of the quick test.
Note: If the Display does not change within 10 seconds, consider these possibilities:
a. Lighter is empty.
b. Unit needs to be re-calibrated (go through the Field Calibration Procedure in these User Instructions
and re-test).
c. Detector is in need of servicing (return unit to factory for servicing).
7. Wait for the display to return to 0% LEL and configure options to desired settings.
FIELD CALIBRATION PROCEDURE
Note: For optimum calibration results the unit should be in clean air and be in a low ambient air flow.
Zero the Sensor
1. Remove the Philips screw on the front of the GD-6. Pull the front cover of the unit off.
2. To select Calibration Zero Mode (000), from normal mode, press the Next button four times to get to CAL or Calibration Mode.
3. Then press the Enter button to get to “000” - Calibration Zero Mode.
4. Press the Enter button and the display will read 0 alternating with 000 (blinking) indicating zero calibration in progress (max
165 sec).
5. If the process is successful, the display will read __0 alternating with PAS (blinking) Zero Calibration complete.
6. If the process was not successful the display will read __1 alternating with Fail (blinking) Zero Failed. If this occurs, repeat
steps 2 through 4. If the sensor fails to zero twice contact Technical Assistance: 1-877-367-7891.
7. To return to Normal Mode press Enter and then press Next until “End” is displayed. Press Enter to return to Normal Mode.
Calibration
1. Remove the Philips screw on the front of the GD-6. Pull the front cover of the unit off.
2. Assemble the 10% LEL gas cylinder and regulator together. Ensure that the gas used for calibration matches the gas that the
GD-6 is configured to (mE, Pro or Hy).
3. Check the pressure gauge on the regulator. If you have 25-psi or less you will need to replace the gas canister.
4. Place the test Hood from the regulator over the gas sensor.
5. To select Calibration Span Mode (SPn), from normal mode, press the Next button four times to get to CAL or Calibration
Mode.
20
6. Then press the Enter button to get to “000” Calibration Zero Mode, then press the Next button to get to “SPn” – Calibration
Span Mode.
7. Press the Enter button and the display will read 10 alternating with the gas, mE, Pro or Hy (blinking), indicating the sensor is
looking for gas.
8. Start applying gas to the gas sensor.
Note: The sensor will look for the gas for 45 seconds. If no gas is applied or detected in that time, the display will return to CAL.
9. When the sensor detects the gas, the display will flash back and forth between the gas concentration and SPn and the
calibration will progress. The display will show this for a maximum of 165 seconds.
10. When the calibration is successful, the display will flash back and forth between 10 and PAS.
11. Remove the gas. The display will return to “SPn”, then normal mode. The calibration is done.
12. If the calibration fails, the display will flash back and forth between the gas concentration and FAL (fail). If this occurs, check
the pressure gauge on the regulator. If the pressure is less than 25-psi the flow of gas may not be adequate to properly
calibrate the unit. If there is proper pressure in the cylinder repeat steps 4 through 11. If the unit fails to calibrate twice contact
Macurco Technical Assistance at 1-877-367-7891.
13. Disassemble the cylinder and regulator.
14. Re-assemble the GD-6 (make sure the LED is aligned with the hole in the front case).
15. See Calibration Flowchart on the inside of the housing.
21
MACURCO FIXED GAS DETECTION PRODUCTS LIMITED WARRANTY
Macurco warrants the GD-6 gas detector will be free from defective materials and workmanship for a period of two (2) years from date
of manufacture (indicated on the inside cover of the GD-6), provided it is maintained and used in accordance with Macurco instructions
and/or recommendations. If any component becomes defective during the warranty period, it will be replaced or repaired free of charge,
if the unit is returned in accordance with the instructions below. This warranty does not apply to units that have been altered or had
repair attempted, or that have been subjected to abuse, accidental or otherwise. The above warranty is in lieu of all other express
warranties, obligations or liabilities. THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR
PURPOSE ARE LIMITED TO A PERIOD OF TWO (2) YEARS FROM THE PURCHASE DATE. Macurco shall not be liable for any
incidental or consequential damages for breach of this or any other warranty, express or implied, arising out of or related to the use of
said gas detector. Manufacturer or its agent’s liability shall be limited to replacement or repair as set forth above. Buyer’s sole and
exclusive remedies are return of the goods and repayment of the price, or repair and replacement of non-conforming goods or parts.
Manufactured by Aerionics, Inc.
Sioux Falls, SD
Email: info@aerionicsinc.com
Phone: 1-877-367-7891
Rev 01-15-2015
© Aerionics 2015. All rights reserved.
Macurco is a trademark of Aerionics, Inc.
22
Loading...