Carrier 19PV550, Инструкции по установке, эксплуатации и обслуживанию

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1 - INTRODUCTION
The 19PV units are designed to cool water for the air conditioning
of buildings and industrial processes.
Prior to the initial start-up of the 19PV units, the people involved
in the on-site installation, start-up, operation, and maintenance of
this unit should be thoroughly familiar with these instructions and
the specific project data for the installation site.
The 19PV liquid chillers are designed to provide a very high level
of safety during installation, start-up, operation and maintenance.
They will provide safe and reliable service when operated within
their application range.
They are designed for an operating life of 15 years by assuming a
75% utilisation factor; that is approximately 100,000 operating hours.
This manual provides the necessary information to familiarize
yourself with the control system before performing start-up
procedures. The procedures in this manual are arranged in the
sequence required for machine installation, start-up, operation
and maintenance.
Always ensure that all required safety measures are followed,
including those in this document, such as: wearing protective
clothing (gloves, safety glasses and shoes) using appropriate tools,
employing qualified and skilled technicians (electricians,
refrigeration engineers) and following local regulations.
To find out, if these products comply with European directives
(machine safety, low voltage, electromagnetic compatibility,
equipment under pressure etc.) check the declarations of
conformity for these products.
1.1 - Installation safety considerations
Access to the unit must be reserved to authorised personnel,
qualified and trained in monitoring and maintenance. The access
limitation device must be installed by the customer (e.g. cut-off,
enclosure).
After the unit has been received, when it is ready to be installed
or reinstalled, and before it is started up, it must be inspected for
damage. Check that the refrigerant circuit(s) is (are) intact,
especially that no components or pipes have shifted (e.g. following
a shock). If in doubt, carry out a leak tightness check and verify
with the manufacturer that the circuit integrity has not been
impaired. If damage is detected upon receipt, immediately file a
claim with the shipping company.
The manufacturer strongly recommends employing a
specialised company to unload the machine.
It is compulsory to wear personal protection equipment.
Do not remove the skid or the packaging until the unit is in
its final position. These units can be moved with a fork lift
truck, as long as the forks are positioned in the right place
and direction on the unit.
The units can also be lifted with slings, using only the
designated lifting points marked on the unit.
Use slings or lifting beams with the correct capacity, and always
follow the lifting instructions on the certified drawings supplied
with the unit. Do not tilt the unit more than 15°.
Safety is only guaranteed, if these instructions are carefully
followed. If this is not the case, there is a risk of material
deterioration and injuries to personnel.
Never cover any protection devices.
This applies to the relief valves (if used) in the refrigerant or
heat transfer medium circuits, the fuse plugs and the pressure
switches.
Ensure that the valves are correctly installed, before operating
the unit.
Classification and control
In accordance with the Pressure Equipment Directive and
national usage monitoring regulations in the European Union
the protection devices for these machines are classified as
follows:
Safety
accessory
(1)
Damage limitation
accessory in case of an
external fire
(2)
Refrigerant side
High-pressure switch x
External relief valve
(3)
x
Rupture disk x
Fuse plug x
Heat transfer fluid side
External relief valve
(4) (4)
(1) Classified for protection in normal service situations.
(2) Classified for protection in abnormal service situations. These accessories are
sized for fires with a thermal flow of 10kW/m². No combustible matter should be
placed within 6.5m of the unit.
(3) The instantaneous over-pressure limited to 10% of the operating pressure does
not apply to this abnormal service situation. The control pressure can be higher
than the service pressure. In this case either the design temperature or the
high-pressure switch ensures that the service pressure is not exceeded in normal
service situations.
(4) The selection of these discharge valves must be made by the personnel
responsible for completing the hydraulic installation.
If the relief valves are installed on a change-over valve, this
is equipped with a relief valve on each of the two outlets. Only
one of the two relief valves is in operation, the other one is
isolated. Never leave the change-over valve in the intermediate
position, i.e. with both ways open bring the actuator in
abutment, front or back according to the outlet to isolate. If
a relief valve is removed for checking or replacement please
ensure that there is always an active relief valve on each of
the change-over valves installed in the unit.
All factory-installed relief valves are lead-sealed to prevent any
calibration change.
The external relief valves and the fuses are designed and
installed to ensure damage limitation in case of a fire.
In accordance with the regulations applied for the design, the
European directive on equipment under pressure and in
accordance with the national usage regulations:
• These relief valves and fuses are not safety accessories
but damage limitation accessories in case of a fire,
• The high pressure switches are the safety accessories.
The relief valve must only be removed if the fire risk is fully
controlled and after checking that this is allowed by local
regulations and authorities. This is the responsibility of the
operator.
When the unit is subjected to fire, safety devices prevent
rupture due to over-pressure by releasing refrigerant. The
fluid may then be decomposed into toxic residues when
subjected to the flame:
• Stay away from the unit
• Set up warnings and recommendations for personnel
in charge to stop the fire.
Fire extinguishers appropriate to the system and the
refrigerant type must be easily accessible.
The external relief valves must in principle be connected
to discharge pipes for units installed in a room. Refer to
the installation regulations, for example those of European
standards EN 378 and EN 13136.
They include a sizing method and examples for configuration
and calculation. Under certain conditions these standards
permit connection of several valves to the same discharge
pipe. Note: Like all other standards these EN standards are
available from national standards organisations.