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Safety Information (continued)
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 ammable atmospheres. Ensure that the leak detection equipment being used is suitable
for use with ammable refrigerants, i.e. non-sparking, 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 powder or CO 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 ammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of re
or explosion. All possible ignition sources, including cigarette smoking, should be kept suf ciently far away from the site of installation,
repairing, removing and disposal, during which ammable refrigerant can possibly be released to the surrounding space. Prior to work
taking place, the area around the equipment is to be surveyed to make sure that there are no ammable hazards or ignition risks. No
Smoking signs shall be displayed.
7. 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.
8.
Checks to the refrigeration equipment: Where electrical components are being changed, they shall be t for the purpose and to
the correct speci cation. 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 ammable
refrigerants: 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.
9. 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.
10. 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 no live electrical
components and wiring are exposed while charging, recovering or purging the system. That there is continuity of earth bonding.
REPAIRS TO SEALED COMPONENTS
1. 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.
2. 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.
3. Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such
a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not
made to original speci cation, damage to seals, incorrect tting of glands, etc. Ensure that apparatus is mounted securely. Ensure
that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of ammable
atmospheres. Replacement parts shall be in accordance with the manufacturer's speci cations. NOTE: The use of silicone sealant may
inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to
working on them.
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. Intrinsically safe components are the only types that can be worked on while live in the
presence of a ammable atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts speci ed by
the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
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Please contact 1-877-527-0313 for further assistance.
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