Information Servicing Information Servicing - INVENTOR AR2MVI32-12WiFi/AR2MVO32-12 Instruction Manual

INFORMATION SERVICING
INFORMATION SERVICING
1. C hecks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are
necessary to ensure that the risk of i gniti on is minimised. For repair to the refrigerating
system, the following precautions shall be complied with prior to conducting work on the
system.
2. Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk of a
flammable gas or vapour being present while the work is being performed.
3. General work area
All maintenance staff and others working in the local area shall be instructed on the nature
of w ork being carried out. Work in confined spaces shall be avoided. The area around the
work space shall be sectioned off. Ensure that the conditions within the area have been
made safe by control of flammable material.
4. C hecking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work,
to ensure the technician is aware of potentially flammable atmospheres. Ensure that the
leak detection equipment being used is suitable for use with flammabl e refrigerants, i.e. no
sparking, adequately sealed or intrinsically safe.
5. Presence of fire extinguisher
If 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 fir e extinguisher adjacent to the charging area.
6. N o ignition sources
No person carrying out work in relati on to a refrigeration system w hich involves exposing
any pipe work that contains or has contained flammable refrigerant shall use any sources of
ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition
sources, including cigarette smoking, should be kept sufficiently far away from the site of
installation, repairing, r emoving and disposal, during which flammable refrigerant can
possibly be released to the surrounding space. Prior to w ork taking place, the area around
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the equipment is to be surveyed to make sure that there are no flammable hazards or ignition
risks. NO SMOKIN G signs shall be displayed.
7. 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 shoul d safely disperse any released refrigerant
and preferably expel it externally into the atmosphere.
8. C hecks 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. If in doubt consult the manufacturer's technical department for assistance.
The following checks shall be applied to installations using flamm able refrigerants:
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the charge size is in accordance with the room size within which the refrigerant containing
parts are installed;
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the ventilation m achinery and outlets are operating adequately and ar e not obstructed;
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if an indirect refrigerating circuit is being used, the secondary circuit shall be checked
for the presence of refrigerant; marki ng to the equipment continues to be visible and
legi ble.
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markings and signs that are illegible shall be corrected;
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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.
9. C hecks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and
component inspection procedures. If a fault exists that could compromise safety, then no
electrical supply shall be connected to the circuit until it is satisfactori ly dealt w ith. If the fault
cannot be corrected immediatel y 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.
Initial safety checks shall include:
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that capacitors are discharged: this shall be done in a safe manner to avoid possibility of
sparking;
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that there no live electrical components and wiring are exposed while charging,
recovering or purging the system;
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that there is continuity of ear th bonding.
10. Repairs to sealed components
10.1 D uring 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
absol utely 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 shal l include damage to cables, excessive number of connections,
terminals not made to original specification, damage to seals, incorrect fitting 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 flamm abl e atmospheres. Replacement
parts shall be in accordance with the manufacturer's specifications.
NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak
detection equipment.Intrinsically safe components do not have to be isolated pri or to
working on them.
11. Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit w ithout ensuring
that this wil l 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 flammabl e atmosphere. The test apparatus shall be at 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.
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