Mini Merlin Installation, Operation & Maintenance
Rev: 03 05-22
5
Installation
Typical Application & Location
Installation must be in accordance with the recognised standards of the appropriate authority in the country concerned!
Access to the interior of the device, when carrying out any work, must only be conducted by trained personnel!
Before carrying out any work ensure local regulations and site procedures are followed!
Easy access is recommended for both status observation and alarm purposes and must be located out of reach of the public!
Isolate the equipment from all hazardous live power sources before opening the cover!
Avoid conditions of any other environmental factors outside of the specification that could potentially impede the accuracy
and operation of the detector such as condensation; vibration; temperature, pressure, the presence of other gases,
electromagnetic interference, and draft zones!
Your new Mini Merlin is a dual gas detector carefully designed to monitor levels of Methane (CH
4
) and Carbon
Monoxide (CO) in the air. If there is a dangerous build-up of target gas at the sensor, this device can shut off the gas
supply via a gas safety valve and /or gas fired appliance(s). This device has additional features for resetting systems,
as well as audible and visual alarms and can also be integrated with a Building Management System (BMS).
Your detector should be installed in areas at risk of gas leaks e.g., over boilers, valves, or meters. Located in positions
determined by those who have knowledge of gas dispersion, the process plant system and equipment involved, and
in consultation with both safety and electrical engineering personnel.
Take in to account the design of the air flow patterns within the zone area. Detectors should be installed in the correct
orientation, as recommended by the manufacturer, and ease of access should be accounted for to allow for any bump
tests and other forms of maintenance throughout its operating life.
There are no official figures of the area coverage of a gas detector; however, 50-100m
2
per detector is a reasonable
general guide therefore consider multiple detectors may be required to adequately protect property and persons.
The target gas will only be identified when contact is made with the sensing element itself.
Recommended heights may vary based on air flow and temperature conditions in addition to the proposed application
and location. The device should be mounted near the boiler or gas fired appliances such as domestic & commercial
boiler rooms and basements.
As a guide only we recommend the following:
•
6ft from sources of combustion e.g., boiler s/ heaters / gas fired appliances etc.
•
4ft from draft zones and ventilation areas e.g., windows, doorways, and a/c units etc.
•
5ft from ground level.
There are no specific standards governing gas detector location (unlike fire detection systems); there are, however,
general guidance documents. The most relevant being
IEC 600-79-29-2: Explosive Atmospheres
–
Part 29: Gas
detectors
–
Selection, installation, use and maintenance of detectors for flammable gases and oxygen
. Much of what it
covers is also relevant to toxic gas detection.
