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1 - INTRODUCTION
The 30XA Aquaforce units are designed to cool water for
the air conditioning of buildings and industrial processes.
Prior to the initial start-up of the 30XA 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 30XA 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 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, 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.
4
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.
This applies to fuse plugs and 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 switch
External relief valve***
Rupture disk
Fuse plug
Heat transfer fluid side
External relief valve****
*
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.
Do not remove these valves and fuses, even if the fire risk
is under control for a particular installation. There is no
guarantee that the accessories are re-installed if the instal-
lation 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
Safety
Damage limitation accessory**
accessory*
in case of an external fire
x
x
x
x
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