Handleiding Argo X3i Eco Plus (pagina 56 van 60) (Engels)

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Warnings for the refrigeration system specialist

Here are warnings and safety instructions for the maintenance of systems containing flammable refrigerant (repairs

should only be carried out by specialists).

a) Any person involved in the work or in the interruption of a refrigeration circuit must be equipped with PEF

(European Refrigerators License) as required by the D.P.R. n. 146/2018 implementing Regulation (EU) no.

517/2014.

b) Maintenance should only be performed as recommended by the equipment manufacturer. Maintenance and

repairs that require the assistance of other qualified personnel must be performed under the supervision of the person

competent in the use of flammable refrigerants.

Before starting work on systems containing flammable refrigerants, safety checks are required to ensure that the risk

of ignition is minimized.

c) Checks to be carried out on systems that use flammable refrigerants:

- the charge must be proportionate to the size of the room in which the units containing refrigerant are installed;

- units and ventilation openings must function properly and are not obstructed;

- if an indirect refrigerant circuit is used, the secondary circuit must be checked for the presence of refrigerant;

- the marking on the equipment must be visible and indelible. Illegible markings and signs must be corrected;

- refrigerant piping or components must be installed in a location where they are unlikely to be exposed to any

substance that can corrode the component-containing refrigerant, unless the components are constructed from

materials that are inherently resistant to corrosion or are adequately protected against corrosion.

d) Checks on electrical devices

Repair and maintenance of electrical components must include initial safety checks and component inspection

procedures. If there is a fault that could compromise safety, do not connect the power supply to the circuit until it is

satisfactorily resolved. If the fault cannot be remedied immediately, but operation must continue, a suitable interim

solution must be used. This must be reported to the owner of the equipment so that all parties are informed.

Initial security checks include:

--- Check that the capacitors are discharged: this must be done safely to avoid the risk of sparks;

--- Verify that no electrical components and wiring are exposed while charging, restoring or draining the system;

--- Check that there is ground continuity.

e) Check for refrigerant leaks

The area should be checked with an appropriate refrigerant detector before and during work, to ensure that the

technician is aware of potentially toxic or flammable atmospheres. Make sure that the leak detection equipment in

use is suitable for use with all applicable refrigerants, i.e. non-sparking, properly sealed or intrinsically safe.

Check for R32 refrigerant leaks

Note: Check for refrigerant leakage in an environment where there are no potential sources of ignition. No halogen

probe (or any other detector that uses an open flame) should be used.

Leak Detection Method:

For systems with R32 refrigerant, an electronic leak detection tool is available to detect and leak detection should

not be conducted in a refrigerant environment. Make sure the leak detector does not become a potential source of

ignition and is applicable to the measured refrigerant. The leak detector must be set for the minimum flammable fuel

concentration (percentage) of the refrigerant. Calibrate and adjust to the correct gas concentration (no more than

25%) with the refrigerant used.

The fluid used in leak detection is applicable to most refrigerants. But do not use chloride based solvents to prevent

the reaction between chlorine and refrigerants and corrosion of copper piping.

If you suspect a leak, remove all fire from the scene or put out the fire.

If the location of the leak is to be welded, then all refrigerants must be recovered or isolate all refrigerants away

from the leak site (using the shut-off valve). Before and during soldering, use OFN to purify the entire system.

f) Presence of fire extinguisher

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