4
1 - INTRODUCTION
Prior to the initial start-up of the 30RY 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 30RY 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.
Be sure you understand and follow the procedures and safety
precautions contained in the instructions supplied with the
machine, as well as those listed in this guide.
Earthquake resistance has not been verified for standard units.
1.1 - Installation safety considerations
This machine must be installed in a location that is not accessible
to the public and protected against access by non-authorised
people.
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.
Ensure 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.
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 desig-
nated lifting points marked at the four corners at the unit base.
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.
Never cover any safety devices.
This applies to the globe valve in the water circuit and the
globe valve(s) in the refrigerant circuit(s).
Ensure that the valves (if used in the refrigerant circuit) are
correctly installed, before operating the unit.
In certain cases the globe stops are installed on ball valves.
These valves are factory-supplied lead-sealed in the open
position. This system permits isolating and removing the
globe stop for checking and replacing. The globe stops are
designed and installed to ensure protection against fire risk.
Removing the globe stops is only permitted if the fire risk is
fully controlled and the responsibility of the user.
All factory-installed globe valves are lead-sealed to prevent
any calibration change. If the globe valves are installed on a
reversing valve (change-over), this is equipped with a globe
valve on each of the two outlets. Only one of the two glove
valves is in operation, the other one is isolated. Never leave
the reversing valve in the intermediate position, i.e. with both
ways open (locate the control element in the stop position). If
a globe stop is removed for checking or replacement please
ensure that there is always an active globe stop on each of the
reversing valves installed in the unit.
Provide a drain in the discharge circuit, close to each valve,
to avoid an accumulation of condensate or rain water.
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 globe valves: See paragraph
“Maintenance safety considerations”.
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
These products incorporate equipment or components under
pressure, manufactured by Carrier or other manufacturers. We
recommend that you consult your appropriate national trade
association or the owner of the equipment or components under
pressure (declaration, re-qualification, retesting, etc.). The
characteristics of this equipment/these components are given
on the nameplate or in the required documentation, supplied
with the products.
Do not introduce high static and dynamic pressure compared
with the existing operating pressures - either service or test
pressures in the refrigerant circuit or in the heat transfer circuit,
especially:
-
limiting the elevation of the condensers or evaporators
-
taking the circulating pumps into consideration.
