8 · Important Safety Instructions · Dehumidifier 50, 35, 22 Pint
g. Ventilated area
Ensure that the area is an open space or that it is adequately ventilated before
breaking into the system or conducting any hot work. There should be a degree
of continuous ventilation while the work is being carried out. The ventilation
should safely disperse any released refrigerant and preferably expel it
externally into the atmosphere.
h. Checks to the refrigeration equipment
Where electrical components are being changed, they shall be t for the purpose
and to the correct specication. At all times, the manufacturer’s maintenance and
service guidelines shall be followed. When in doubt, consult Customer Service for
assistance. The following checks shall be applied to installations using ammable
refrigerants:
The charge size is in accordance with the room size within which the parts containing
refrigerants are installed.
The ventilation machinery and outlets should operate adequately and should not
obstructed; ifan indirect refrigerating circuit is being used, the secondary circuit shall
be checked for the presence of refrigerants.
Any marking to the equipment should continue to be visible and legible. Markings and
signs that are illegible shall be corrected.
Refrigeration pipes 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 corroded.
i. Checks 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 satisfactorily 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:
Ensuring that capacitors are discharged: this shall be done in a safe manner to avoid
possible sparking;
Ensuring that no live electrical components and wiring are exposed while charging,
recovering, or purging the system;
Ensuring that there is continuity of earth bonding;
6. Repairs To Sealed Components
a. During repairs to sealed components, all electrical supplies shall be disconnected
from the unit being worked on prior to the removal of sealed covers and other parts
(if any). If it is necessary to have an electrical supply connected to the unit 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.
b. Particular attention shall be paid to the following to ensure that when 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 the cables, an excessive number
of connections, terminals not made to the original specication, damage to seals,
incorrect tting of glands, etc.
Ensure that the unit is mounted securely.
Ensure that the seals or sealing materials have not been degraded to a point that they
no longer serve the purpose of preventing the ingress of ammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specications.
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