Manual Comfee CDDOE-12DEN7-QA3-(EU) Dehumidifier

Manual

05

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.

7.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 aected. 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.

NOTE: The use of silicon sealant may inhibit the eectiveness of some types of leak

detection equipment. Intrinsically safe components do not have to be isolated prior

to working on them.

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 can be

worked on while live in the presence of a flammable atmosphere. The test apparatus

shall be at the correct rating. Replace components only with parts specified by the

manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere

from a leak.

8.Repair to intrinsically safe components

7)Ventilated area

Ensure that the area is in the open or that it is adequately ventilated before breaking

into the system or conducting any hot work. A degree of ventilation shall continue

during the period that the work is carried out. The ventilation should safely disperse

any released refrigerant and preferably expel it externally into the atmosphere.

8)Checks to the refrigeration equipment

Where electrical components are being changed, they shall be fit for the purpose

and to the correct specification. At all times the manufacturer's maintenance and

service guidelines shall be followed. If in doubt consult the manufacturer's technical

department for assistance. The following checks shall be applied to installations

using flammable refrigerants: The charge size is in accordance with the room size

within which 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.

flammable refrigerant can possibly be released to the surrounding space. Prior to work

taking place, the area around the equipment is to be surveyed to make sure that there

are no flammable hazards or ignition risks. No Smoking signs shall be displayed.

Rating

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