COLUMBIA VAC OPC1000N Manual Del Usuario página 22

SAFETY WARNINGS FOR SERVICING
Observe all these warnings when performing the following works while servicing the dehumidifier
with R290.
1. Area inspections
Before performing any works on circuits containing flammable refrigerants, it is necessary to perform
safety inspections of the area to make sure that the risk of ignition is minimised. When repairing the
cooling system, the following precautions must be implemented before working on the system.
2. Working procedure
Tasks should be carried out under the controlled procedure so that the risk of the presence of
flammable gas or vapours is minimised when work is being carried out.
3. General workplace
All maintenance personnel and others working in the place should be instructed in the nature of
the work. Avoid working indoors. The area around the workplace must be isolated. Make sure that
conditions in the area have been secured by control flammable materials.
4. Refrigerant-presence inspection
Before and during performing work, check the area with a suitable refrigerant detector to ensure
that the technician is aware of potentially flammable atmospheres. Make sure that the leak-detection
equipment used is suitable for use with flammable refrigerants, i.e., does not cause sparking, is
properly sealed, and is intrinsically safe.
5. Fire-extinguishing accessibility
If any hot operations are to be carried out on the cooling equipment or any associated parts, suitable
fire-extinguishing equipment should be available. Dry powder or CO2 fire extinguisher should be
placed adjacent to the charging area.
6. No ignition sources
No persons performing work on cooling systems, which consists of uncovering pipes containing
flammable refrigerant may use any ignition sources in a manner creating a risk of fire or explosion. All
possible sources of ignition, including cigarette smoking, should be kept at a suitable distance from
the place of installation, repair, removal, and disposal, during which the flammable refrigerant can
be released into the environment. Before starting work, examine the area around the equipment to
ensure that there is no fire or ignition hazard. Place "No smoking" signs.
7. Ventilated area
Make sure that the area is outside or properly ventilated before performing any repair or maintenance
works on the system or hot operations. A certain degree of ventilation should be maintained
during the work-performing period. Ventilation should safely disperse the released refrigerant, and
preferably release it outside into the atmosphere.
8. Cooling equipment inspections
In the event of the replacement of electrical components, they should be appropriate for the purpose,
and compliant with the relevant specifications. The manufacturer's guidelines for maintenance and
servicing must be observed at all times. If any doubts, contact the technical department of the
manufacturer.
The following inspections should be performed concerning the systems using flammable refrigerants:
- The size of the load is compliant with the room size in which components containing refrigerant
are installed;
- Ventilation units and outlets are working properly, and are not clogged up;
- When using an intermediate cooling circuit, check for the refrigerant;
- The marking of the device is still visible and legible. Markings and signs which are illegible must
be corrected;
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