Marstair A2LCELLARMATCH, Техническое руководство

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3G ALARM INSTALLATION
A method of alarm is required identify a potential loss of gas. This can be a cellar temperature "out of limits" alarm, or
something more specific like a gas leak detector.
In the case of a leak the alarm should as a minimum either: -
• Alarm lamp flashing or lighting
• Alarm horn sounding
• Display warning on equipment controller
If leak detection is installed, it should be either the sensor type or via existing pressure sensing devices. The leak
detection method (sensor type), needs to be calibrated/tested annually and sensitive to < 20% of the lower
flammability level of the refrigerant. If the detector uses a drop in pressure, then it needs to be tested for correct
operation. If a pressure type of detector is used, due to the inaccuracy of this method, the operator should assume
that a flammable mixture could be present within the cellar and appropriate action must be taken
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– SYSTEM SELECTION PROCESS
1. Find minimum room size acceptable based on EN 378 = refrigerant charge (kg) / (lower flammability limit X 0.2) in
the tables below
2. Check whether your cellar size is bigger
– If it is, that’s great you can move on to the next part if not try the
following:-
a. Reducing your pipe run
b. Use 2 smaller systems instead of 1 big system.