Air Conditioning (Direct Systems Vrf/Vrv) - Danfoss DGS-SC Installation And Operation Manual

Installation and Operation Guide | DGS Modbus

2.4 Air Conditioning (Direct Systems VRF/VRV)

For compliance with EN378, at least one detector shall be installed
in each occupied space being considered and the location of de-
tectors shall be chosen in relation to the refrigerant and they shall
be located where the refrigerant from the leak will collect. In this
case refrigerants are heavier than air and detectors should have
their 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 sealed are part of the occupied space.
CAUTION: Monitoring ceiling voids in a hotel room would not
strictly comply with EN378.
Best practice installation includes installing the gas detector at a
height below the room occupants. E.g. in a hotel room this is less
than bed height (between 200 and 500 mm [8 and 20 inches] off
the floor).
Ensure the sensor is mounted away from drafts and heat sources
like radiators etc. and avoid sources of steam.
Avoid mounting it under mirrors, at vanity units and in or near
bed bathrooms.
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