DC Inverter U-Match Series Cassette Type Unit
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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.
5.4.1.9 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:
(1) That capacitors are discharged: this shall be done in a safe manner to avoid
possibility of sparking.
(2) That no live electrical components and wiring are exposed while charging,
recovering or purging the system.
(3) That there is continuity of earth bonding.
5.4.2 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) 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 specification, damage
to seals, incorrect fitting 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 flammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specifications.
Содержание GUD100T/B-S
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