Macurco GD-6 User Manual
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
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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
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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
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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.
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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
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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
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