Specifications

M GD-100 M anual
6109-9000 Rev 3 17
• With air-cooled chillers or air-cooled condensers with non-
enclosed condenser sections it is difficult to effectively monitor
leaks in the coil sections. With some designs it will be possible
using an airflow sensor to monitor airfl ow to the start–up fans in
the front or rear sections.
• If there is a possibility of refrigerant leaks into a duct or air-
handling unit install a sensor to monitor the airflow.
Weatherproof sensors shoul d be used for unprotected outdoor
applications.
2.6. Air Conditioning (Direct Systems VRF/VRV)
For com pliance with EN378, at least one detector shall be installed in
each occupied s pace being considered and t he loc ation of detectors
shall be chosen in relation to the refrigerant and they shall be l ocated
where the refrigerant from the leak will collect. In this case refrigerants
are heavier than air and detectors should have thei r sensors mounted
low, e.g., at less than bed height in the case of an hotel or other similar
Category Class A spaces. Ceilings or other voids if not seal ed are part of
the occupied space.
CAUTION: Monitoring ceiling voids in a hotel room would
not strictly comply with EN378.
Do Mount In-Room Sensors… Don’t Mount Sensors…
…at less than the normal heights of the
occupants. E.g., in a hotel room this is
less than bed height ( between 8 and
20 in [200 and 500 mm] off the floor).
…under mirrors.
…away from drafts and heat sources like
radiators, etc.
…at vanity units.
… to avoid sourc es of steam. …in or near bathrooms.
IMPORTANT: Carefully consider ramifications of using too few
sensors. A few extra sensors could make a significant
differenc e if a gas leak occurs.