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1 - SAFETY CONSIDERATONS
1.3 - Installation safety considerations
The units are classified as "indirect heat exchange systems" and
are designed to be installed in a special location (class C in
accordance with ISO-5149 and EN-378) which only authorised
personnel are permitted to access; this personnel must be aware
of the general and special safety precautions for the establishment,
and must also be qualified and trained in surveillance and
maintenance. The customer is responsible for installing the access
restriction device.
The chiller must be located at least 6 m from the nearest entrance
to the building and must be installed in a room where air is able
to circulate freely. No charge limitation applies to class "C"
occupancy level for R-1234ze(E). Refer to these standards for
further details. This level must be confirmed by the customer.
After the unit has been received, and before it is started up, it must
be inspected for damage. Check that the refrigerant circuits are
intact, especially that no components or pipes have shifted or been
damaged (e.g. following a shock). If in doubt, carry out a leak
tightness check.
An extinguisher must be accessible and visible close to the
machine installation area
Pressure equipment and components
These products include pressure equipment or components
manufactured by the unit manufacturer or by other manufacturers.
We recommend that you contact your professional body to find
out which regulations affect you as the operator or owner of
pressure equipment or components (declaration, re-qualification,
re-testing). The characteristics of this equipment/these components
are given on the nameplate or in the required documentation,
supplied with the products.
These units comply with the European Pressure Equipment
Directive.
The units are intended to be stored and operated in an environment
where the ambient temperature does not drop below the minimum
allowable temperature indicated on the nameplate.
Do not introduce significant static or dynamic pressure with
regard to the operating pressures used during operation or
for tests in the refrigerant circuit or in the heat exchange
circuits.
NOTE: Monitoring during operation, re-qualification,
re-testing, exemption from retesting:
■ Follow the regulations on monitoring pressure equipment.
■ The user or operator is usually required to create and
maintain a monitoring and maintenance log.
■ In the absence of any regulations, or in addition to the
regulations, follow the guidance in EN 378.
■ Follow the local professional recommendations, whenever
they exist.
■ Regularly inspect the condition of the coating (paint) on
the surface of the components to detect blistering resulting
from corrosion. To do this, check an uninsulated part of
the vessel, or for rust drips at a joint in the insulation.
■ Regularly check for the presence of any impurities
(e.g. sand, grit) in the heat transfer fluids. These impurities
can cause wear and/or pitting corrosion.
■ Filter the heat-transfer fluid and carry out internal
inspections as described in EN 378-2 Appendix C.
■ The reports of the periodical checks by the user or the
operator must be included in the monitoring and
maintenance log.
■ In case of re-testing please refer to the maximum operating
pressure given on the unit nameplate.
Repair:
Any repair or modification, including replacement of
removable parts:
■ Must comply with local regulations and must be performed
by qualified operators in accordance with qualified
processes, including changing a wiring harness conductor,
■ Must be approved by the original manufacturer. Repairs
and modifications which involve a permanent assembly
(welding, soldering, expansion of tubes, etc.) must be
performed by qualified operators following operating
procedures,
■ All modifications and repairs must be listed in the
monitoring and maintenance register,
■ Never attempt to repair or modify a plate heat exchanger.
Recycling:
■ The unit is fully or partially recyclable. After use, it may
contain refrigerant vapors and oil residues. Some parts
are painted.
Corrosion build-up :
Below thickness values are applicable on evaporator shell-and-
tube heat exchanger and on oil separator :
Gazeous refrigerant side: 0 mm
Heat-transfer medium side:
■ 1 mm for tube sheets in lightly alloyed steels,
■ 0 mm for stainless steel plates or plates with copper-nickel or
stainless-steel protection.
Water-box : 1 mm
Parts painted : 0 mm
If any part of the piece (with 0mm of acceptable corrosion) shows
corrosion, change the piece.
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