
95
GB
DEHUMIDIFIER / AIR PURIFIER
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:
–
Those 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
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 also 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.
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
fi
cation, damage to seals,
incorrect
fi
tting of glands, etc.
• Ensure that the apparatus is mounted securely.
• Ensure that seals or sealing materials have not degraded to the point that
they no longer serve the purpose of preventing the ingress of
fl
ammable
atmospheres.
Replacement parts shall be in accordance with the manufacturer’s
speci
fi
cations.
NOTE :
The use of silicon sealant can 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