1. INFORMATION ON SERVICING
1) Checks to the area: Prior to beginning work on
systems containing flammable refrigerants, safety
checks are necessary to ensure that the risk of
ignition 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) Checking 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
flammable refrigerants, i.e. non-sparking,
adequately sealed or intrinsically safe.
4) Presence of fire extinguisher: If any hot work is
to be conducted on the refrigeration equipment or
any associated parts, appropriate fire extinguish-
ing equipment shall be available to hand. Have a
dry powder or CO2 fire extinguisher adjacent to the
charging area.
5) No ignition sources: No person carrying out work
in relation to a refrigeration system which 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, removing and disposal,
during which flammable refrigerant can possibly
be released to the surrounding space. Prior to work
taking place, the area around the equipment is to
be surveyed to make sure that there are no flamma-
ble hazards or ignition risks. “No Smoking” signs
shall be displayed.
6) 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
should safely disperse any released refrigerant and
preferably expel it externally into the atmosphere.
7) Checks to the refrigeration equipment: Where
electrical components are being changed, they shall
be fit for the purpose and to the correct specifica-
tion. 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 flammable refrigerants:
– The charge size is in accordance with the room
size within which the refrigerant containing parts
are installed;
– The ventilation machinery and outlets are operat-
ing adequately and are not obstructed;
– If an indirect refrigerating circuit is being used, the
secondary circuit shall be checked for the presence
of refrigerant;
– Marking to the equipment continues to be visible
and legible. Markings and signs that are illegible
shall be corrected;
– 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
atgainst being so corroded.
8) Checks to electrical devices: Repair and mainte-
nance 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 ºsatisfactorily dealt with. If
the fault cannot be corrected immediately 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:
• That capacitors are discharged: this shall be done
Troubleshooting
4
EN
Ref. 636134
DEHUMIDIFIER
DESHUMIFICADOR
