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15 INFORMATION SERVICING
1) C
hecks to the area
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For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system.
2) Work procedure
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is being performed.
3) General work area
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4) 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
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adequately sealed or intrinsically safe.
5) Presence of re extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate re extinguishing equipment shall be
available to hand. Have a dry power or CO
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re extinguisher adjacent to the charging area.
6) No ignition sources
No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained
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7) Ventilated area
Ensure that the area is in the open or that it adequately ventilated before breaking into the system or conducting any 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.
8) Checks to the refrigeration equipment
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turer s maintenance and service guidelines shall be followed. If in doubt consult the manufacturer's technical department for assistance. The
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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 circuits shall be checked for the presence of refrigerant; marking to the
equipment continues to be visible and legible.
Marking 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.
9)
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, and 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 earth bonding.
10) 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.
b) Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a
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Ensure that apparatus is mounted securely.
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NOTE
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to be isolated prior to working on them.
11) Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and
current permitted for the equipment in use. Intrinscially safe components are the only types that can be worked on while live in the presence of
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Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
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