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1 - INTRODUCTION
The 30XA Aquaforce units are designed to cool water for
the air conditioning of buildings and industrial procsses.
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.
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, shoes) and safety glasses, using appro-
priate tools, employing qualified and skilled technicians
(electricians, refrigeration engineers) and following local
regulations. These units comply with the requirements of
the European machine safety, electromagnetic compatibility,
pressurised equipment and low voltage directives.
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. follow-ing 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.
4
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 safety devices.
This applies to the relief valve in the water circuit and the
relief valve(s) in the refrigerant circuit(s).
Ensure that the valves are correctly installed, before
operating the unit.
In certain cases the relief valves are installed on isolating
valves. These valves are factory-supplied lead-sealed in the
open position. This system permits isolation and removal
of the relief valves for checking and replacing. The relief
valves are designed and installed to ensure protection
against overpressure caused by fire.
The relief valve must only be removed when the fire risk
is fully controlled and this is the responsibility of the
operator.
All factory-installed relief valves are lead-sealed to prevent
any calibration change. 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.
If the unit is installed in a room, the safety valves must be
connected to discharge pipes. These pipes must be installed
in a way that ensures that people and property are not
exposed to refrigerant leaks. These fluids may be diffused
in the air, but far away from any building air intake, or
they must be discharged in a quantity that is appropriate
for a suitably absorbing environment.
Periodic check of the relief valves: See paragraph
"Maintenance safety considerations".
Provide a drain in the discharge circuit, close to each
relief valve, to avoid an accumulation of condensate or
rain water.
Ensure good ventilation, as accumulation of refrigerant
in an enclosed space can displace oxygen and cause
asphyxiation or explosions.
Inhalation of high concentrations of vapour is harmful
and may cause heart irregularities, unconsciousness, or
death. Vapour is heavier than air and reduces the amount
of oxygen available for breathing. These products cause
eye and skin irritation. Decomposition products are
hazardous.
1.2 - Equipment and components under pressure
See section "10.2 - Pressure vessels".
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