Table of Contents
Advertisement
1 - INTRODUCTION
The AquaForce
TM
30XB, 30XBE and 30XBP units are designed to
cool water for the air conditioning of buildings and industrial processes.
Prior to the initial start-up of the 30XB 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.
They are designed for an operating life of 15 years by assuming a
75% utilisation factor; that is approximately 100,000 operating hours.
The 30XB 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.
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, ear defenders, 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.
Carrier strongly recommends employing a specialised
company to unload the machine.
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.
These units are not designed to be lifted from above. Use
slings with the correct capacity, and always follow the lifting
instructions on the certified drawings supplied with the unit.
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.
DO NOT COVER ANY PROTECTION DEVICES.
Check that the protective devices are well installed and not
covered before operating the unit.
The unit must be placed on hard ground or concrete.
This applies to relief valves (if used) in the refrigerant or heat
transfer medium 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. Install devices at the valve
outlets or drain piping that 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
drain piping, must not impair operation and not lead to a
pressure drop that is higher than 10% of the control pressure.
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:
Refrigerant Side
High pressure safety loop
(3)
External relief valve
(4)
Rupture disk
Heat transfer fuid side
External relief valve
(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) High pressure safety loop = SRMCR as described in component section of this
manual and in electrical diagram.
(4) The instantaneous overpressure limitation of 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.
(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 desing:
- 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 12.3
Do not remove these valves even if the fire risk is under
control for a particular installation. There is no guarantee that
the accessories are re-installed if the installation is changed
or for transport with a gas charge.
When the unit is subjected to fire, safety devices prevent
rupture due to over-pressure by releasing the 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
NOTE : Pressure equipment for the hydraulic module (option)
are delivered as separate items. Their integration in the
complete hydraulic installation remain under the user's
responsibility.
All factory-installed relief valves are lead-sealed to prevent any
calibration change. 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.
The external relief valves must always be connected to drain
Device for damage
Safety
limitation in the event of an
device
(1)
external fire
X
X
X
(5)
(5)
(2)
5
Hide quick links:
Advertisement
Table of Contents
