Handleiding REMKO RKL 360 Eco S-Line (pagina 9 van 28) (Engels)

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n Leak detection methods

The following leak detection methods are per-

mitted for systems with combustible refriger-

ants. Electronic equipment must be used for

detecting leaks. These must be selected with

the sensitivity matched to the situation and

recalibrated if necessary (calibration must take

place in a refrigerant-free environment). The

leak detection device must be adjusted to the

lowest flammability limit (LFL) of the refrig-

erant. Liquid leakage instruments are permitted

for most refrigerants. Chlorinated substances

are the exception here as the chlorine in com-

bination with the refrigerants can cause corro-

sion on the copper cables. If a leak is detected,

all potential open ignition sources must be

removed immediately

. If a leak has been

detected in the system which requires

reworking of the piping in the form of soldering,

the system must be completely free of refrig-

erant or, if possible, the affected part discon-

nected from the system using stopcocks. The

affected system parts must be flushed with

oxygen-free nitrogen run before and during the

repair work.

n Emptying and evacuating the system

If the refrigerant circuit must be opened for

repairs or other reasons, this must be carried

out in a safe and professional way

. In any

event, proceed with extreme caution since igni-

tion may occur at any time! Stick to the fol-

lowing procedure:

1. Drain the refrigerant

2. Flush the system with insert gas

3. Evacuate

4. Repeat steps 2 to 3 if required

5. Opening the system by cutting or soldering

The system must be flushed with oxygen-free

nitrogen in order to guarantee safety. The

flushing process must be repeated multiple

times if necessary. Do not use compressed air

or oxygen for the flushing process! After evacu-

ating, flushing takes place by filling with dried

nitrogen until the operating pressure is reached

and then the system must be evacuated again.

This flushing process must often be repeated

until there is no more refrigerant in the system.

After the last flushing, the system must be

brought to the ambient pressure in order to

start work. The flushing process is indispen-

sable when soldering work is required on the

piping. Ensure that the vacuum pump outlet is

not near an ignition source and continuous

ventilation is guaranteed.

n Filling process

The following requirements for the general

specifications must also be fulfilled during the

filling process:

- Ensure that no contamination occurs from

other refrigerants (residues in the filling equip-

ment).

- Keep the lines as short as possible to mini-

mise the likelihood of residues forming.

- Filling bottles and cylinders must be stood

upright.

- Ensure that the system is earthed before

filling.

- Label the system with the refrigerant type

designation after filling

- Never exceed the maximum fill level.

The system must be checked for leaks (pres-

sure test!) before filling. The system must be

checked for leaks once more after filling and

before commissioning. Check for leaks again

when leaving the work space.

n Labelling when shutting down

If a unit must be taken out of operation and the

refrigerant must be disposed of, the unit must

be labelled with the date and a signature.

Ensure that the note remains attached to the

combustible refrigerant.

n T

ransportation of units which contain com-

bustible refrigerants

National provisions must be observed.

n Storing of units which contain combustible

refrigerant

National provisions must be observed.

n Transportation without the original pack-

aging

If the units are transported without the original

packaging, they must be packed in such a way

that mechanical damage is prevented. The

units must be transported upright.

1.9 Unauthorised modification

and changes

Modifications or changes to units and components

are not permitted and may cause malfunctions.

Safety devices may not be modified or bypassed.

Original replacement parts and accessories

authorised by the manufactured ensure safety

. The

use of other parts may invalidate liability for

resulting consequences.

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