Swegon BlueBox Tau SKY Hi HP Instructions For Installation, Use And Maintenance Manual page 16

(Annex DD.4.8) Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any
hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely
disperse any released refrigerant and preferably expel it externally into the atmosphere.
(Annex DD.4.9) Checks to the refrigerating equipment
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times
the manufacturer's maintenance and service guidelines shall be followed. If in doubt consult the manufacturer's technical
department for assistance.
The following checks shall be applied to installations using flammable refrigerants (some parts are only applicable to refri-
gerant containing units or components installed inside the building):
• the charge size is in accordance with the room size within which the refrigerant containing parts are installed;
• the ventilation machinery and outlets are operating adequately and are not obstructed;
• if an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant;
• marking to the unit and components continues to be visible and legible. Markings and signs that are illegible shall be
corrected;
• refrigeration pipe or refrigerant containing components are installed in a position where they are unlikely to be exposed
to any substance which may corrode refrigerant containing components, unless the components are constructed of
materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
(Annex DD.4.10) Checks to electrical components
Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.
If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily
dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary
solution shall be used. This shall be reported to the owner of the unit so all parties are advised.
Initial safety checks shall include:
• that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
• that no live electrical components and wiring are exposed while charging, recovering or purging the system;
• that there is continuity of earth bonding.
(Annex DD.5) Repairs to sealed components
(Annex DD.5.1)
During repairs to sealed components, all electrical supplies shall be disconnected from the unit being worked upon prior to
any removal of sealed covers, guards, etc.
If it is absolutely necessary to have an electrical supply to the unit during servicing, then a permanently operating form of
refrigerant leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
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Translation from original instructions We reserve the right to make changes without any prior notice.