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1 - SAFETY CONSIDERATONS
The units are intended to cool water for building air conditioning
or for industrial processes.
They are designed to provide a very high level of safety and
reliability, making installation, start-up, operation and maintenance
easier and safer.
They will provide safe and reliable service if used within their
application ranges.
They are designed for a theoretical operating life of 15 years based
on load profiles defined within the applicable Ecodesign regulations
Beyond this period, the manufacturer recommends to proceed to
a fatigue prevention survey on the refrigerating circuit conducted
by an operator qualified for the control of pressure equipments. It
is recommended to repeat this check every 5 years. This control
does not replace the requirements of applicable national
regulations.
Prior to the initial start-up of the units, everyone involved in the
works should be thoroughly familiar with these instructions and
with the characteristics of the installation site, and ensure these
are respected.
The procedures in this manual are arranged in the sequence
required for installation, start-up, operation and maintenance of
the units. Ensure that you follow them and that you take the
required safety precautions, including those listed in this guide,
which include wearing personal protective equipment (gloves,
safety glasses, safety shoes), having the appropriate tools, and
employing qualified, skilled technicians (electricians, refrigeration
system specialists).
To find out if these products comply with European directives
(machine safety, low voltage, electromagnetic compatibility,
pressure equipment, etc.) check the declarations of conformity for
these products.
1.1 - Protection devices safety considerations
Check that the protective devices are well installed before
operating the unit.
An internal fault with the compressor variable frequency drive can
cause serious injury if the variable frequency drive has not been
closed correctly: it is essential to ensure that all covers are in place
and correctly secured before switching on the power supply to the
unit.
Do not obstruct any protective devices:
This applies to any fusible plugs, rupture disks and valves
fitted on the refrigerant or energy transfer fluid circuits. Check
if the original protection plugs are still present at the valve
outlets. These plugs are generally made of plastic and should
not be used. If they are still present, please remove them.
Fit devices at the valve or discharge pipe outlets to prevent
the penetration of foreign bodies (dust, building debris, etc.)
and atmospheric agents (water can form rust or ice). These
devices, as well as the discharge piping, must not impair
operation and not lead to a pressure drop that is higher than
10% of the set pressure.
Classification and control:
In accordance with the Pressure Equipment Directive and
national usage monitoring regulations in the European Union,
the protective devices fitted to these machines are classified
as follows:
Refrigerant side
High pressure safety loop
(3)
External relief valve
(4)
Rupture disk
Heat transfer fluid side
External relief valve
(1) Classified for protection in normal service situations.
(2) Classified for protection in abnormal service situations. These devices are sized
for fires with a thermal flow of 10kW/m². No combustible matter should be placed
within 6.5m of the unit.
(3) High Pressure safety loop = SRMCR as described in section 6.2 and on the
wiring diagram.
(4) The instantaneous overpressure limitation of 10% of the operating pressure
does not apply to this abnormal service situation.
The set pressure can be higher than the operating pressure. In this case, either
the design temperature or the high pressure switch ensures that the operating
pressure is not exceeded in normal service situations.
(5) The selection of these relief valves must be made by the personnel responsible
for completing the hydraulic installation.
In compliance with the European Pressure Equipment
Directive (PED) and national regulations relating to design:
■ These valves are not safety devices but accessories which
limit damage in the event of a fire,
■ The safety device is the high pressure safety loop
described in section 6.2.
Device for limitation of
Safety
damage in the event of
device
(1)
an external fire
X
X
X
(5)
(5)
(2)
5
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