Oasis I Series, Руководство по установке и эксплуатации

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CHECKS TO ELECTRICAL DEVICES
Repair and maintenance to electrical components shall include ini
ti
al safety checks and component inspec
ti
on
procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit
un
ti
l it is sa
ti
sfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to con
ti
nue
opera
ti
on, an adequate temporary solu
ti
on shall be used. This shall be reported to the owner of the equipment, so
all par
ti
es are advised.
Ini
ti
al 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 con
ti
nuity of earth bonding.
CABLING
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibra
ti
on, sharp edges or any other
adverse environmental e
ff
ects. The check shall also consider the e
ff
ects of aging or con
ti
nual vibra
ti
on from sources
such as compressors or fans.
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 necessary to have an electrical supply to
equipment during servicing, then a permanently opera
ti
ng form of leak detec
ti
on shall be located at the most
cri
ti
cal point to warn of a poten
ti
ally hazardous situa
ti
on.
2) Par
ti
cular a
tt
en
ti
on 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 protec
ti
on is a
ff
ected. This shall include damage to cables, excessive
number of connec
ti
ons, terminals not made to original spec
ifi
ca
ti
on, damage to seals, incorrect
fitti
ng 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 preven
ti
ng
the ingress of
fla
mmable atmospheres. Replacement parts shall be in accordance with the manufacturer's
spec
ifi
ca
ti
ons.
NOTE: The use of silicon sealant may inhibit the e
ff
ec
ti
veness of some types of leak detec
ti
on equipment.
Intrinsically safe components do not have to be isolated prior to
REPAIR TO INTRINSICALLY SAFE COMPONENTS
Do not apply any permanent induc
ti
ve or capacitance loads to the circuit without ensuring that this will not exceed
the permissible voltage and current permi
tte
d for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the presence of a
fla
mmable
atmosphere. The test apparatus shall be at the correct ra
ti
ng. Replace components only with parts spec
ifi
ed by the
manufacturer. Other parts may result in the igni
ti
on of refrigerant in the atmosphere from a leak.
DETECTION OF FLAMMABLE REFRIGERANTS
Under no circumstances shall poten
tia
l sources of igni
ti
on be used in the searching for or detec
ti
on of refrigerant
leaks. A halide torch (or any other detector using a naked
fl
ame) shall not be used.
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