Singer Dry Up SDHM-20L ECO, Instruction Manual

Page: 24 / 64

24
ENGLISH
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.
10. Repairs to sealed components
During repairs to sealed components, all electrical supply shall be discon-
nected 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, uninterrupted leak detection should be performed on the most dan-
gerous parts to prevent potentially dangerous situations from occurring.
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,
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 atmos-
pheres. Replacement parts shall be in accordance with the manufacturer’s
speci
fi cations.
11.Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit with-
out ensuring that this will not exceed the permissible voltage and current per-
mitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while
live in the presence of a
fl ammable atmosphere. The test apparatus shall be
at the correct rating.
Replace components only with parts speci
fi ed by the manufacturer. Other parts
may result in the ignition of refrigerant in the atmosphere from a leak.abling
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 consider the effects of aging or continual vibration from sources such