Bedienungsanleitung Inventor V6MCRI32-18WiFiR (Seite 34 von 148) (Deutsch, Englisch)

771611

Zoom out

Zoom in

Vorherige Seite

1/148

Nächste Seite

Page 34 

 Page 34 

11. 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. Intrinscially 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.

12. 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.

13. Detection of ammable refrigerants

Under no circumstances shall 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)

shall not be used.

10. Repairs to sealed components

10.1 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.

10.2 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 affected.

This shall include 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 shall

be in accordance with the manufacturer s specications.

NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak detection

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

15. Removal and evacuation

When breaking into the refrigerant circuit to make repairs of for any other purpose

conventional procedures shall be used, However, it is important that best practice is followed

since ammability is a consideration. The following procedure shall be adhered to:

remove refrigerant;

purge the circuit with inert gas;

evacuate;

purge again with inert gas;

open the circuit by cutting or brazing.

The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be

ushed with OFN to render the unit safe. This process may need to be repeated several times.

Compressed air or oxygen shall not be used for this task.

Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to

ll until the working pressure is achieved, then venting to atmosphere, and nally pulling down

to a vacuum. This process shall be repeated until no refrigerant is within the system.

14. Leak detection methods

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 shall be

calibrated in a refrigerant-free area.) Ensure that the detector is not a potential source of ignition

and is suitable for the refrigerant. Leak detection equipment shall 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 pipe-work.

If a leak is suspected ,all naked ames shall be removed or extinguished. If a leakage of refrigernat

is found which requires brazing, all of the refrigerant shall be recovered from the system, or

isolated(by means of shut off valves) in a part of the system remote from the leak . Oxygen free

nitrogen(OFN) shall then be purged through the system both before and during the brazing process.

 Page 35 

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Inventor V6MCRI32-18WiFiR Seite 34

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Andere Handbücher von Inventor V6MCRI32-18WiFiR

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info