8
f) No ignition sources: No person carrying out work in relation to a refrigeration system which
All
possibly be released to the surrounding space. Prior to work taking place, the area around the
No Smoking signs shall be displayed.
g) 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.
h) Checks to the refrigeration equipment: Where electrical components are being changed, they
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
•
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 equipment continues to be visible and legible. Markings and signs that are
illegible shall be corrected;
•
Refrigeration pipe or 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.
i) Checks to electrical devices: 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 equipment 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 there no live electrical components and wiring are exposed while charging,
recovering or purging the system;
•
That there is continuity of grounding.
7. Repairs to sealed components
a) During repairs to sealed components, all electrical supplies shall be disconnected from the
equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely
necessary to have an electrical supply to equipment during servicing, then a permanently
operating form of leak detection shall be located at the most critical point to warn of a
potentially hazardous situation.
Summary of Contents for NPRAC10KEWMZ1
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