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1 - INTRODUCTION
30XW-V/30XWHV units are designed to cool or heat water
for the air conditioning and heating of buildings and
industrial procsses.
Prior to the initial start-up of the 30XW-V/30XWHV 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.
30XW-V/30XWHV units are designed for a very high level of
safety during installation, start-up, operation and maintenance.
They are designed for an operating life of 15 years by
assuming a 75% utilisation factor; that is approximately
100,000 operating hours.
They will provide safe and long-lasting service when operated
within their application range.
This manual provides the necessary information to fami-
liarize 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 protec-
tive 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 and 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.
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*
Damage limitation accessory**
in case of an external fire
Refrigerant side
High-pressure switch
x
External relief valve***
x
Rupture disk
x
Fuse plug
x
Heat transfer fluid side
External relief valve****
x
* Classified for protection in normal service situations.
** Classified for protection in abnormal service situations.
*** 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.
**** The classification of these relief valves must be made by the personnel that
completes the whole hydronic installation.
If the relief valves are installed on a change-over manifold,
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 (locate the control element in the stop position). 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.
