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Important Safety Information
READ AND FOLLOW ALL SAFETY INSTRUCTIONS
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, 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. 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.
2. To ensure that by working on electrical components the casing is not altered in such a way that the level
of protection is affected, particular attention shall be paid to the following:
• Damage to cables, excessive number of connections, terminals not made to original specification,
damage to seals, incorrect fitting of glands, etc.
• Ensure the 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 flammable atmospheres. Replacement parts shall be in accordance with the
manufacturer's specifications.
Note: The use of silicon 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 flammable
atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts specified
by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any
other adverse environmental effects. The check shall also take into account the effects of aging or continual
vibration from sources such as compressors or fans.
SAVE THESE INSTRUCTIONS!
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