Operating instructions

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MGS – Murco Gas Sensor EC / SC model

Gas Detector and Transmitter

Installation & Operation*

Content Page

1- Installation Instructions 2

2- Location Instructions 2

3- Typical Settings 2

4- Installation and Wiring Diagrams 2

5- Operating Instructions 2

6- Test/Function Instructions 3

7- Remote sensor head installation 3

8- MGS - Annual test 3

9- Agree Selectable functions with end-users 4

10- Troubleshooting 4

11- Connections to Murco Control Panels 4

12- Mounting Diagrams 4

08 ASH (1)

*Technician use only

This unit must be installed by a suitably qualified technican who will install this unit in accordance with these instructions and the

standards set down in their particular industry/country. Suitably qualified operators of the unit should be aware of the regulations and

standards set down by their industry/country for the operation of this unit. These notes are only intended as a guide and the

manufacturer bears no responsibility for the installation or operation of this unit.

Failure to install and operate the unit in accordance with these instructions and with industry guidelines may cause serious injury

including death and the manufacturer will not be held responsible in this regard.

Murco Ltd.

114a Georges Street Lower, Dun Laoghaire Co Dublin. Ireland,

e-mail: info@murco.ie web: www.murco.ie

Summary of content (6 pages)

PAGE 1
MGS – Murco Gas Sensor EC / SC model Gas Detector and Transmitter Installation & Operation* Content Page 1- Installation Instructions 2 2- Location Instructions 2 3- Typical Settings 2 4- Installation and Wiring Diagrams 2 5- Operating Instructions 2 6- Test/Function Instructions 3 7- Remote sensor head installation 3 8- MGS - Annual test 3 9- 4 Agree Selectable functions with end-users 10- Troubleshooting 4 11- Connections to Murco Control Panels 4 12- Mounting Diagrams 4 *Tech
PAGE 2
1- MGS Installation Instructions • With heavier than air gases such as halocarbon and hydrocarbon refrigerants such as R404A, propane, and butane sensors should be located near ground level • With lighter than air gas e.g. ammonia, the sensor needs to be located above the equipment to be monitored on a bracket or high on a wall within 300 mm of, or on the ceiling provided there is no possibility of a thermal layer trapped under the ceiling preventing gas reaching the sensor. (NB.
PAGE 3
Diagram 1 Electrochemical Sensor SW2 Diagram 2 Semiconductor Sensor SW1 Short to Cancel Warm up Delay Sounder & Relay Set Point Voltage SW1 SW2 0V Sounder & Relay Set Point Voltage Adjust Span Sensor Voltage Short to Cancel Warm up Delay Adjust Span Adjust Zero 0V Adjust Zero Adjust Sounder and Relay set point (P1) Sensor Voltage Adjust Sounder and Relay set point (P1) 6 5 4 3 2 1 Relay and Sounder Delay – JP5 & JP6 off : no delay JP5 on only : 1 minute JP6 on only : 5 minutes JP5 & JP6 o
PAGE 4
Agree Selectable functions with end-users: MGS to MGD Controller wiring diagram You should agree these important functions with the customer so that the system will operate as he/she requires: Time Delay Response: available on the sounder and relay to avoid false alarms. This is set with jumpers. The default delay is 0 minutes. You may wish to set to 15 minutes during start up and construction if you may have VOC (volatile organic compounds) fumes, paint etc in the rooms. They should be reset as required.
PAGE 5
Exd IP66 147 152 122 O3/4'' UNI ISO 7/1 RC 162 160 180 70 122 75 7 14 Mounting Holes 2 x Clearance for M6 O8 O3/4'' UNI ISO 7/1 RC 114 IP 66 Airflow Duct Mount Outdoor Remote Exd Sensor Head 5m Cable Vent Pipe Outdoor 1’’ BSP Head 3m Cable 50mm Hole in Duct for Pitot 20mm 7 50mm 130mm 150mm 162 122 Back view of MB5 Enclosure 60mm Mounting Holes 2 x Clearance for M6 IP 66 enclosure 5m remote IP 65 sensor IP 66 enclosure 5m remote IP 65 EExd sensor 3.
PAGE 6
81.50mm Key Hole Reset Button 13.00mm 16.00mm 4,6 Sensor Controller Enclosure Relay Expander Box 1,2 Sensor Controller Enclosure 260.50mm Screw 5.0 130.25mm 15.5 9.0 Mounting Holes O5.10mm O10.00mm 50.0 240.50mm 224.70mm 10.0 Screw 4.8 242.50mm 260.50mm 12.7 77.2 81.50mm 74.5 12.5 5 plcs PG 7 35.0 25.0 14.0 17.5 12.8 9.0 74.8 15.5 10.0 25.0 10.0 14.0 63.5 15.0 28.7 17.5 12.8 74.8 12.8 9.0 17.5 12.8 15.5 15.0 28.7 6 67.70mm 15.0 15.0 12.7 77.2 O4.