Bedienungsanleitung Argo DRY PURY 11 - 13 - 17 - 21

805015

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The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is

aware of potentially toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable for

use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.

 Presence of fire extinguisher

lf any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing

equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.

 No ignition sources

No person carrying out work in relation to a refrigeration system which involves exposing any pipe work shall use any

sources of ignition in such a manner that it may lead to the risk of fire or explosion. AII possible ignition sources,

including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and

disposal, during which 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.

 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.

 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. lf in doubt, consult the manufacturer's

technical department for assistance.

The following checks shall be applied to installations using flammable refrigerants:

---The actual refrigerant charge 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;

---lf 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.

 Checks to electrical devices

Repair and maintenance to electrical components shall include initial safety checks and component inspection

procedures. lf a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until

it is satisfactorily dealt with. lf 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.

lnitial 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.

 Repairs to sealed components

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. lf 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.

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 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 flammable atmospheres. Replacement parts shall be in accordance with the manufacturer's

specifications.

NOTE: The use of silicon sealant can inhibit the effectiveness of some types of leak detection equipment. lntrinsically

safe components do not have to be isolated prior to working on them.

Repair to intrinsically safe components

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.

lntrinsically safe components are the only types that can be worked on while live in the presence of a flammable

atmosphere. The test apparatus shall beat 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.

Cabling

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 take into account the effects of aging or continual vibration from

sources such as compressors or fans.

Detection of flammable refrigerants

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