A2L refrigerant safety considerations
CAUTION
You must read all of this section before installing this unit.
WARNING
Do not use means to accelerate the defrosting process or to clean, other than those recommended by
the manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources (for example,
open flames, an operating gas appliance, or an operating electric heater.
Do not pierce or burn
Be aware that refrigerants may not contain an odor.
General
Item
number
Safety consideration
1 Any appliance containing more than 4 lb in a refrigerating circuit must be constructed
such that any refrigerant leak cannot stagnate in a way that would create a fire or
explosion hazard.
2 Before beginning work on systems containing flammable refrigerants, safety checks are
necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating
system, item 3 to item 7 below must be adhered to before conducting work on the
system.
3 Work must be undertaken under a controlled procedure so as to minimize the risk of a
flammable gas or vapor being present while the work is being performed.
4 Instruct all maintenance staff and others working in the local area on the nature of work
being carried out. Avoid work in confined spaces.
5 The area must be checked with an appropriate refrigerant detector before and during
work to ensure the technician is aware of potentially toxic or flammable atmospheres.
Ensure that the leak detection equipment being used is suitable for use with all
applicable refrigerants: non-sparking, adequately sealed, or intrinsically safe.
6 If conducting any hot work on the refrigerating equipment or any associated parts, you
must have appropriate fire-extinguishing equipment on hand. Have a dry powder or
CO
2
fire extinguisher adjacent to the charging area.
7 If conducting work in relation to the refrigerating system that involves exposing any
pipework, do not use any sources of ignition in such a manner that may lead to the risk
of fire or explosion. All possible ignition sources, including cigarette smoking, must be
kept sufficiently far away from the site of installation, repair, removal, and disposal,
during which refrigerant might possibly be released to the surrounding space. Before
conducting any work, survey the area around the equipment ito ensure that there are
no flammable hazards or ignition risks. Display “No Smoking” signs.
Installation Manual: R-454B Outdoor Split-System Air Conditioner8
Johnson Controls Ducted Systems
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