Riello NXHP Series Installation, Operation And Maintenance Instructions page 13

1 - INTRODUCTION
The accidental releases of the refrigerant, due
to small leaks or significant discharges
following the rupture of a pipe or an unexpected
release from a relief valve, can cause frostbites
and burns to personnel exposed. Do not
ignore such injuries. Installers, owners and
especially service technicians for these units
must:
■ Seek medical attention before treating such
injuries.
■ Have access to a first-aid kit, especially for
treating eye injuries.
Make sure that all the heat or cold generator
on the water loop are turned off before any
intervention on the water loop.
Never apply an open flame or live steam to a
refrigerant circuit. Dangerous overpressure
can result.
During refrigerant removal and storage
operations follow applicable regulations.
These regulations, permitting conditioning
and recovery of halogenated hydrocarbons
under optimum quality conditions for the
products and optimum safety conditions for
people, property and the environment are
described in every applicable standard. The
units must never be modified to add refrigerant
and oil charging, removal and purging
devices. All these devices are provided with
the units.
Refer to the certified dimensional drawings
for the units.
It is dangerous and illegal to re-use disposable
(non-returnable) cylinders or attempt to refill
them. When cylinders are empty, evacuate the
remaining gas pressure, and move them to a
designated place for recovery. Do not
incinerate.
Do not attempt to remove refrigerant circuit
components or fittings, while the machine is
under pressure or while it is running. Be sure
pressure is at 0 kPa and that the unit has been
shut-down and de-energised before removing
components or opening a circuit.
Do not attempt to repair or recondition any
safety devices when corrosion or build-up of
foreign material (rust, dirt, scale, etc.) is found
within the valve body or mechanism. If
necessary, replace the device. Do not install
safety valves in series or backwards.
CAUTION:
No part of the unit must be used as a walkway,
rack or support. Periodically check and repair
or if necessary replace any component or
piping that shows signs of damage.
Do not step on refrigerant lines. The lines can
break under the weight and release refrigerant,
causing personal injury.
Do not climb on a machine. Use a platform,
or staging to work at higher levels.
Use mechanical lifting equipment (crane,
hoist, winch, etc.) to lift or move heavy
components. For lighter components, use
lifting equipment when there is a risk of
slipping or losing your balance.
Use only original replacement parts for any
repair or component replacement. Consult the
list of replacement parts that corresponds to
the specification of the original equipment.
Do not drain water circuits containing
industrial brines, without informing the
technical service department at the installation
site or a competent body first.
Close the entering and leaving water shut-off
valves and purge the unit hydraulic circuit,
before working on the components installed
on the circuit (screen filter, pump, water flow
switch, etc.).
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