EN-9 POWERCIAT LX ST/HE/XE
2.2.2 - Positioning 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 3 “Dimensions, clearances” to conrm
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
certied dimensional drawing supplied with the unit.
The support points under the chassis must have at least the size
of the chassis opening at the lifting point (minimum 220 x 180 mm)
in order to prevent a deformation of the chassis.
These units are typically used in refrigeration systems,
and therefore do not need to be able to withstand earthquakes
or high winds. Earthquake resistance has not been veried.
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 strengthening measures have been taken.
- 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 ow and to
ensure access to the components.
- The number of support points is adequate and that they are
in the right places.
- The location is not subject to ooding.
- 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.
- Bafes may be necessary to deect strong winds. They
must not restrict air ow into the unit.
Before lifting the unit, check that all casing panels
are securely xed in place. Lift and set down the
unit with great care. Tilting and jarring can damage
the unit and impair unit operation.
If units are hoisted with rigging, it is advisable to protect the coils
against accidental impacts. Use struts or spreader bar 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.
If a unit contains a hydraulic module, the hydraulic module
and pump piping must be installed in a way that does not
submit it to any strain. The hydraulic module pipes must be
tted so that the pump does not support the weight of the
pipes.
2.2.3 - Checks before system start-up
Before the start-up of the refrigeration system, the complete
installation, including the refrigeration system must be veried
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 as follows:
External visual installation checks:
- Ensure that the machine is charged with refrigerant. Verify
on the unit nameplate that the ‘fluid transported’ is R134A
and is not nitrogen.
- 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,
certificates, 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.
- Check that ventilation in the plant room is adequate.
- Check that refrigerant detectors are present.
- Verify the instructions and directives to prevent the
deliberate removal of refrigerant gases that are harmful to
the environment.
- 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.
2 - PRELIMINARY CHECKS