8
2.3 - Checks before system start-up
Before the start-up of the refrigeration system, the complete
installation, including the refrigeration system must be
verified against the installation drawings, dimensional
drawings, system piping and instrumentation diagrams and
the wiring diagrams.
For these checks national regulations must be followed. If
the national regulation does not specify any details, refer
to standard EN 378-2 as follows:
External visual installation checks:
•
Compare the complete installation with the refrigeration
system and power circuit diagrams.
•
Check that all components comply with the design
specifications.
•
Check that all protection documents and equipment
provided by the manufacturer (dimensional drawings,
P&ID, declarations etc.) to comply with the regulations
are present.
•
Verify that the environmental safety and protection and
devices and arrangements provided by the manufacturer
to comply with the regulations are in place.
•
Verify that all documents for pressure containers, certifi-
cates, name plates, files, instruction manuals provided
by the manufacturer to comply with the regulations
are present.
•
Verify the free passage of access and safety routes.
•
Verify the instructions and directives to prevent the
deliberate removal of refrigerant gases.
•
Verify the installation of connections.
•
Verify the supports and fixing elements (materials,
routing and connection).
•
Verify the quality of welds and other joints.
•
Check the protection against mechanical damage.
•
Check the protection against heat.
•
Check the protection of moving parts.
•
Verify the accessibility for maintenance or repair and
to check the piping.
•
Verify the status of the valves.
•
Verify the quality of the thermal insulation and of the
vapour barriers.
•
Ensure that the ventilation in the machine room is
sufficient.
•
Check the refrigerant detectors.
3 - INSTallaTION SpECIfICS fOR 30RQSY UNITS
3.1 - General
Each fan is controlled by a variable-speed controller.
Therefore each circuit operates independently and must
have a separate duct system to avoid any air recycling
between the air heat exchangers of the different refrigerant
circuits.
On the 30RQSY units each fan includes a factory-mounted
connection frame interface for the connection to the duct
network of the specific refrigerant circuit to which the fan
belongs.
For the precise dimensions of this connection interface
please refer to the dimensional drawings for the units.
2 - MOvING aND SITING THE UNIT
2.1 - Moving
See chapter 1.3 - “Installation safety considerations”.
2.2 - Siting the unit
The machine must be installed in a place that is not accessible
to the public or protected against access by non-authorised
persons.
In case of extra-high units the machine environment must
permit easy access for maintenance operations.
Always refer to the chapter “Dimensions and clearances”
to confirm that there is adequate space for all connections
and service operations. for the centre of gravity coordinates,
the position of the unit mounting holes, and the weight
distribution points, refer to the certified dimensional
drawing supplied with the unit.
Typical applications of these units do not require earthquake
resistance. Earthquake resistance has not been verified.
CAuTION: Only use slings at the designated lifting points
which are marked on the unit.
Before siting the unit check that:
•
the permitted loading at the site is adequate or that
appropriate strenghtening measures have been taken.
•
if the unit has to operate as a heat pump in temperatures
below 0°C it must be raised at least 300 mm from the
ground. This is necessary to avoid ice build-up on the
unit chassis and also to permit correct unit operation in
locations where the snow level may reach this height.
•
the unit is installed level on an even surface (maximum
tolerance is 5 mm in both axes).
•
there is adequate space above the unit for air flow and
to ensure access to the components (see dimensional
drawings).
•
the number of support points is adequate and that
they are in the right places.
•
the location is not subject to flooding.
•
for outdoor installations, where heavy snowfall is likely
and long periods of sub-zero temperatures are normal,
provision has to be made to prevent snow accumulating
by raising the unit above the height of drifts normally
experienced. Baffles may be necessary to deflect strong
winds. They must not restrict air flow into the unit.
CAuTION: Before lifting the unit, check that all casing
panels are securely fixed in place. Lift and set down the
unit with great care. Tilting and jarring can damage the
unit and impair unit operation.
If 30RQS/RQSY units are hoisted with rigging, it is advisable
to protect coils against crushing while a unit is being moved.
Use struts or a lifting beam to spread the slings above the
unit. Do not tilt a unit more than 15°.
WArNINg: Never push or lever on any of the enclosure
panels of the unit. Only the base of the unit frame is
designed to withstand such stresses.
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