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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 (labels on
the chassis and a label with all unit handling instructions
are attached to the unit).
Use slings with the correct capacity, and always follow
the lifting instructions on the certified drawings supplied
for 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 safety 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 safety 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.
All factory-installed safety valves are lead-sealed to
prevent any calibration change.
Safety
Damage limitation accessory**
accessory*
in case of an external fire
x
x
x
x
x
x
The external safety valves must always be connected to
drain pipes for units installed in a closed room (30RQSY).
Refer to the installation regulations, for example those of
European standard EN 378 and EN 13136.
These pipes must be installed in a way that ensures that
people and property are not exposed to refrigerant leaks.
As the fluids can be diffused in the air, ensure that the outlet
is far away from any building air intake, or that they are
discharged in a quantity that is appropriate for a suitably
absorbing environment.
Safety valves must be checked periodically. See paragraph
"Repair safety considerations".
If the safety valves are installed on a reversing valve
(changeover), this is equipped with a safety valve on each
of the two outlets. Only one of the two safety 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 safety
valve is removed for checking or replacement please ensure
that there is always an active safety valve on each of the
reversing valves installed in the unit.
Provide a drain in the discharge circuit, close to each safety
valve, to avoid an accumulation of condensate or rain water.
All precautions concerning handling of refrigerant must
be observed in accordance with local regulations.
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 can be hazardous.
1.4 - 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 compo-
nents 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.
5
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