Swegon BlueBox Tau SKY Hi HP Instructions For Installation, Use And Maintenance Manual page 15

(Annex DD.4) Information on servicing
(Annex DD.4.1) General
(Annex DD.4.2) Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks in the area are necessary to ensure
that the risk of ignition is minimised. For repair to the refrigerating system, DD.4.3 to DD.4.7 shall be completed prior to
conducting work on the system.
(Annex DD.4.3) Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being pre-
sent while the work is being performed.
(Annex DD.4.4) General work area
All maintenance staff and others working in the local area shall be instructed on the nature of the work being carried out.
Work in confined spaces shall be avoided.
(Annex DD.4.5) Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is
aware of potentially toxic and flammable atmospheres.
Ensure that the refrigerant or leak detection equipment being used is suitable for use with the refrigerant applicable to the
unit, i.e. non-sparking, adequately sealed or intrinsically safe.
(Annex DD.4.6) Presence of fire extinguisher
If any hot work is to be conducted on the unit requiring an increase in the temperature of parts of the unit (e.g. brazing),
appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent
to the refrigerant charging area.
(Annex DD.4.7) No ignition sources
No person carrying out work in relation to a unit shall use any sources of ignition in such a manner that it may lead to the risk
of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the
site of installation, repairing, removing and disposal of the unit, during which flammable refrigerant can possibly be released
to the surrounding space. Prior to work taking place, the area around the unit is to be surveyed to make sure that there are
no flammable hazards or ignition risks. "No Smoking" signs shall be displayed.
We reserve the right to make changes without any prior notice. Translation from original instructions
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