HTW A3 Serie Manual De Usuario E Instalacion página 36

area around the equipment should be inspected to ensure that there are no flammable hazards or
ignition risks. "No Smoking" signs will be posted.
1.7 Ventilated area
Make sure the area is open or adequately ventilated before entering the system or doing any hot
work. A certain degree of ventilation will be maintained during the period of carrying out the work.
Ventilation must safely disperse any released refrigerant and preferably exhaust it externally to the
atmosphere.
1.8 Refrigeration equipment controls
When electrical components are replaced, they must be fit for purpose and to the correct
specifications. The manufacturer's maintenance and service guidelines shall be followed at all
times. If in doubt, consult the technical department of the manufacturer for help. The following
checks will be made for installations that use flammable refrigerants: the size of the charge is
adjusted to the size of the room in which the parts containing refrigerant are installed; the
ventilation machine and the outlets work properly and are not obstructed; if an indirect refrigeration
circuit is used, the presence of refrigerant in the secondary circuit shall be checked; equipment
marking remains visible and legible. It is necessary to correct the marks and signals that are
illegible;
1.9 Controls of electrical devices
Repair and maintenance of electrical components will include initial safety checks and component
inspection procedures. If there is a fault that could compromise safety, no power supply will be
connected to the circuit until it is satisfactorily resolved. If the fault cannot be corrected
immediately, but it is necessary to continue operation, an appropriate temporary solution shall be
used. This will be reported to the equipment owner for all parties to be informed.
Initial safety checks will include: discharging capacitors – this will be done safely to avoid the
possibility of sparks; that there are no live electrical components and wiring exposed during system
charging, recovery, or purging; that there is continuity of the ground connection.
2 SEALED COMPONENT REPAIRS
2.1During repairs to sealed components, all electrical supplies should be disconnected from the
equipment being worked on before removing sealed covers, etc. If it is absolutely necessary to
have a power supply to the equipment during maintenance, then a permanently functioning form
of leak detection will be located at the most critical point to warn of a potentially dangerous
situation.
Maintenance shall be performed only as recommended by the manufacturer.
The appliance shall be stored in a well-ventilated area in which the size of the room corresponds
to the area of the room specified for operation.
2.2 Special attention shall be paid to the following to ensure that when working on electrical
components, the casing is not disturbed in such a way that the level of protection is affected.
This will include damaged cables, an excessive number of connections, terminals not conforming
to original specifications, damaged gaskets, improper cable gland mounting, etc. Make sure the
appliance is securely mounted. Make sure that gaskets or sealing materials have not degraded
to the point that they are no longer effective in preventing the ingress of flammable atmospheres.
Replacement parts must conform to the manufacturer's specifications.
NOTE The use of silicone sealant may inhibit the effectiveness of some types of leak detection
equipment.
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