ARCTIC WIND 3AWH8000A handleiding

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10

IMPORTANT SAFETY INSTRUCTION

damage to cables, excessive number of

connections, terminals not made to original

specication, damage to seals, incorrect

tting 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 ammable atmospheres. Replacement

parts should be in accordance with the

manufacturer’s specications.

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.

INTRINSICALLY SAFE COMPONENTS

MUST BE REPLACED

• 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 ammable atmosphere. The test apparatus

shall be at the correct rating.

• Replace components only with parts specied

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

eects. The check shall also take into account

the eects of aging or continual vibration from

sources such as compressors or fans.

DETECTION OF FLAMMABLE

REFRIGERANTS

•

Under no circumstances, should potential sources

of ignition be used in the searching for or detection

of refrigerant leaks. A halide torch (or any other

detector using a naked ame) should not be used.

• The following leak detection methods are

deemed acceptable for systems containing

ammable refrigerants. Electronic leak detectors

shall be used to detect ammable refrigerants,

but the sensitivity may not be adequate, or

may need re-calibration. (Detection equipment

should be calibrated in a refrigerant-free area.)

Ensure that the detector is not a potential source

of ignition and is suitable for the refrigerant

used. Leak detection equipment should be set

at a percentage of the LFL of the refrigerant and

shall be calibrated to the refrigerant employed

and the appropriate percentage of gas (25 %

maximum) is conrmed.

• Leak detection uids are suitable for use with

most refrigerants but the use of detergents

containing chlorine shall be avoided as the

chlorine may react with the refrigerant and

corrode the copper pipework.

• If a leak is suspected, all naked ames should be

removed/ extinguished. If a leakage of refrigerant is

found which requires brazing, all of the refrigerant

should be recovered from the system, or isolated

(by means of shut o valves) in a part of the system

remote from the leak. Removal of refrigerant shall

be according to Removal and evacuation..

REMOVAL AND EVACUATION

• When breaking into the refrigerant circuit to make

repairs—or for any other purpose - conventional

procedures shall be used. However, for ammable

refrigerants it is important that best practice is

followed since ammability is a consideration.

• The following procedure shall be adhered to:

• Remove refrigerant

• Safely remove refrigerant following local

and national regulations;

• Evacuate;

• Purge the circuit with inert gas

(optional for A2L);

• Evacuate (optional for A2L);

• continuously ush or purge with inert gas

when using ame to open circuit; and

• open the circuit.

• The refrigerant charge should be recovered

into the correct recovery cylinders. if venting

is not allowed by local and national codes. For

WARNING

For using R32 refrigerant

(Continued)

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