13 / EN
Local air-conditioner / User Manual
2. Instructions for repairing appliances containing
R290
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; 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.
2.1.9 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: 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 continuity of earth bonding.
2.2 Repairs to sealed components
2.2.1 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.
2.2.2 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.
C
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.
2.3 Repair to intrınsıcally safe
components
Do not apply any permanent inductive or
capacitance loads to the circuit without ensuring
Summary of Contents for BP207C
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