FMA5L, FMA5X: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Where electrical components are being changed, they shall be fit
according to their 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 flammable refrigerants:
– The actual refrigerant charge is in accordance with the room size
within which the refrigerant containing parts are installed.
– The ventilation machinery and outlets are operating adequately and
are not obstructed.
– If an indirect refrigerating circuit is being used, the secondary
circuit shall be checked for the presence of refrigerant.
– Equipment marking must remain visible and legible. Markings and
signs that are illegible shall be corrected.
Refrigerating pipe or components are installed in a position where they
are unlikely to be exposed to any substances which may corrode
refrigerant containing components, unless the components are
constructed of materials that are inherently resistant to corrosion or are
suitably protected against corrosion.
Repair and maintenance of 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 the fault has been dealt with satisfactorily.
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 that all parties are
advised. Initial safety checks shall include:
– That capacitors are discharged: this shall be done in a safe manner
to avoid the possibility of sparking.
– That no live electrical components and wiring are exposed while
charging, recovering or purging the system.
– That there is continuity of grounding.
PERSONAL INJURY / PROPERTY DAMAGE HAZARD
This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or persons who
lack experience and knowledge, unless they are supervised or have
been given instructions concerning the use of the appliance by a person
responsible for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
Any person who is involved with working on or opening a refrigerant
circuit should hold a current valid certificate from an industry
accredited assessment authority, which authorizes their competence to
handle refrigerants safely in accordance with an industry recognized
assessment credential.
Servicing shall only be performed as recommended by the equipment
manufacturer.
Maintenance and repair requiring the assistance of other skilled
personnel shall be carried out under the supervision of a person
competent in the use of flammable refrigerants.
Prior to beginning work on systems containing flammable refrigerants,
safety checks are necessary to minimize the risk of ignition.
PERSONAL INJURY / PROPERTY DAMAGE HAZARD
When repairing the refrigerating system, comply with the following
precautions prior to conducting work on the system:
- shall be undertaken according to controlled procedures so as to
minimize the risk of the presence of flammable gases or vapors
while the work is being performed.
- All maintenance staff and others working in the local area shall
be instructed on the nature of work being carried out. Work in
confined spaces shall be avoided.
- The area shall be checked with an appropriate refrigerant
detector prior to and during work, to ensure the technician is
aware of potentially toxic or flammable environment.
- If any hot work is to be conducted on the refrigerating
equipment or any associated parts, appropriate fire
extinguishing equipment shall be available and easily
accessible. Have a dry powder or CO fire extinguisher adjacent
to the charging area.
- When carrying out work in relation to a refrigerating system
that involves exposing any pipe work, no sources of ignition
shall be used 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, repair, or removal and disposal of the unit, during
which refrigerant can possibly be released into the surrounding
space. Prior to beginning work, the area around the equipment
is to be surveyed to make sure that there are no flammable
hazards or ignition risks. "No Smoking" signs shall be clearly
displayed.
Ensure that the area is in the open or that it is adequately ventilated
before opening he 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 surroundings
PERSONAL INJURY / PROPERTY DAMAGE HAZARD
Sealed electrical components shall be replaced. Intrinsically safe
components must be replaced. Check that cabling will not be subject to
wear, corrosion, excessive pressure, vibration, sharp edges or any other
adverse environmental effects. The check shall also take into account
the effects of aging or continual vibration from sources such as
compressors or fans. Under no circumstances shall potential sources of
ignition be used while searching for or detection of refrigerant leaks. A
halide torch (or any other detector using a naked flame) shall not be
used. Electronic leak detectors may be used to detect refrigerant leaks
but, in the case of flammable refrigerants, the sensitivity may not be
adequate, or may need re-calibration. (Detection equipment shall be
calibrated in a refrigerant-free area.) Ensure that the detector is not a
potential source of ignition and is suitable for the refrigerant used. Leak
detection equipment shall be set at a percentage of the LFL of the
refrigerant and shall be calibrated for the refrigerant employed, and the
appropriate percent age of gas (25% maximum) is confirmed. If a leak
is suspected, all naked flames shall be removed/extinguished. If a
leakage of refrigerant which requires brazing is found, all of the
refrigerant shall be recovered from the system, or isolated (by means of
shut off valves) in a part of the system remote from the leak. Leak
detection fluids are also suitable for use with most refrigerants but the
use of detergents containing chlorine shall be avoided as the chlorine
may react with the refrigerant and corrode the copper pipe-work.
NOTE: Examples of leak detection fluids are:
– bubble method.
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