SystemAir AC-RSR105R32HEC, Installation And Maintenance Manual

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4 SYSAER R32
Safety class (ISO 817) A2L
PED Group 1
Practical limit (kg/m
3
) 0.061
ATEL/ ODL (kg/m
3
) 0.30
LFL (kg/m
3
) @ 60°C 0.307
Vapour density @25°C, 101.3 kPa (kg/m
3
) 2.13
Molecular mass 52.0
Boiling point (°C) -52
GWP (100 yr ITH) 675
GWP (ARS 100 yr ITH) 677
Autoignition temperature (°C) 648
1.3. INSTALLATION INFORMATION
This rooftop has to be installed in open air or machinery room (location classification III).
To ensure location classification III a mechanical vent on the secondary circuit(s) has to be installed.
Local building codes and safety standards shall be followed; in absence of local codes and standards refer
to EN 378-3:2016 as a guide.
1.3.1. GENERAL GUIDELINES FOR SAFE USE OF R32 FOR EQUIPMENT LOCATED IN THE OPEN AIR
Refrigerating systems sited in the open air shall be positioned to avoid leaked refrigerant flowing into a
building or otherwise endangering people and property.
The refrigerant shall not be able to flow into any ventilation fresh air opening, doorway, trap door or similar
opening in the event of a leak. Where a shelter is provided for refrigerating equipment sited in the open air
it shall have natural or forced ventilation.
For refrigeration systems installed outside in a location where a release of refrigerant can stagnate e.g.
below ground, then the installation shall comply with the requirements for gas detection and ventilation of
machinery rooms.
1.3.2. GENERAL GUIDELINES FOR SAFE USE OF R32 FOR EQUIPMENT LOCATED IN A MACHINERY
ROOM
When a machinery room is chosen for the location of the refrigerating equipment it shall be located in
accordance with local and national regulations. The following requirements (according to EN 378-3:2016)
can be used for the assessment.
²
Machinery rooms should not be used as occupied spaces. The building owner or user shall ensure
that access is permitted only by qualified and trained personnel doing the necessary maintenance to
the machinery room or general plant.
²
Machinery rooms shall not be used for storage with the exception of tools, spare parts and
compressor oil for the installed equipment. Any refrigerants, or flammable or toxic materials shall be
stored as required by national regulations.
²
Open (naked) flames shall not be permitted in machinery rooms, except for welding, brazing
or similar activity and then only provided the refrigerant concentration is monitored and adequate
ventilation is ensured. Such open flames shall not be left unattended.
²
A remote switching (emergency type) for stopping the refrigerating system shall be provided
outside the room (near the door). A similar acting switch shall be located at a suitable location inside
the room.
²
All piping and ducting passing through floors, ceiling and walls of machinery room shall be sealed.
²
Hot surfaces shall not exceed a temperature of 80 % of the auto-ignition temperature (in °C) or
100 K less than the auto-ignition temperature of the refrigerant, whichever is lower.
Refrigerant: R32
²
Self-Ignition temperature: 648°C
²
Maximum surface temperature: 548°C