Instruction/ maintenance manual of the product GD-6 3M
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3 Macurco ™ Combustible Gas Detector , Controller and T ransducer User Instructions IMPORT ANT : Keep these User Instructions for reference. GD-6.
1 T ABLE OF CONTENTS GENERAL SAFETY INFORMA TION ................................................................................................................ 2 Intended Use ..........................................................................
2 3 W WARNING GENERAL SAFETY INFORMA TION Intended Use The 3M™ Macurco™ GD-6 Combustible Gas Detector , Controller and T ransducer is a low voltage device with selectable 4-20mA output, buzzer and digital display options.
4 5 Ifyouhaveanydoubtsabouttheapplicabilityoftheequipmenttoyourjobsitua tion, consultanIndustrialHygienistorcall3M Macurco T echnical Ser vice at 1-800-243-4630. In Canada, call 1-800-267-4414.
6 7 Installation 1. The 3M™ Macurco™ GD-6 Combustible Gas Detector mounts on a type 4S electrical box supplied by the contractor . 2. Connect the 3M™ Macurco™ GD-6 Combustible Gas Detector to Class 2 power supply only .
8 9 T ypical Multiple 3M™ Macurco™ GD-6 Combustible Gas Detector Installation INSTALLA TION NOTES 1. One sensor per 900 square feet (approximately). 2. If the gas used is natural gas (methane) or Hydrogen (H2) mount the 3M™ Macurco™ GD-6 Combustible Gas Detector high on a wall about one foot down from the ceiling.
10 11 GD-6 Main Fan Power 120VAC ALARM 120VAC Power Exhaust Fans coil coil power output GD-6 – + power output – + 8 7 6 5 4 4 3 3 2 2 1 1 1 1 3 3 4 5 6 7 8 9 2 24 V RET N.
12 13 T o change settings, remove the Philips screw on the front of the 3M™ Macurco™ GD-6 Combustible Gas Detector . Pull off the front cover of the unit. Gas Selection T o 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) .
14 15 Selecting Fan Minimum Run Time – “Frr” T o select the Fan Minimum Runtime setting, in normal mode, press the Ne xt 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.
16 17 Operation T est 1. Remove the single screw in the middle of the front cover of the 3M™ Macurco™ GD-6 Combustible Gas Detector . 2. Remove the front cover . 3. Observe the LED light on the front of the 3M™ Macurco™ GD-6 Combustible Gas Detector .
18 19 Gas T esting T esting 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 3M™ Macurco™ GD-6 Combustible Gas Detector . Remove the front cover . 2. Connect the 10% LEL cylinder of Combustible Gas to the regulator .
20 21 5. The 4-20mA output should ramp up from 4mA in clean air to 20mA at 50% LEL. See 4-20mA diagram in these User 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.
22 23 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.
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If you already are a holder of 3M GD-6, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 3M GD-6.
However, one of the most important roles played by the user manual is to help in solving problems with 3M GD-6. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3M GD-6 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
