Charging any refrigerant other than the original type (R410A)
will impair machine operation and can even cause irreparable
damage to the compressors. The compressors operating with
this refrigerant type are lubricated with a synthetic polyolester
oil.
Before any intervention on the refrigerant circuit, the complete
refrigerant charge must be recovered.
RISK OF EXPLOSION:
Never use air or a gas containing oxygen during leak tests to
purge ductwork or to pressurise a unit. Pressurised air
mixtures or gases containing oxygen can be the cause of an
explosion. Oxygen reacts violently with oil and grease.
Only use dry nitrogen for leak tests, with an appropriate tracer
gas if necessary.
If the recommendations above are not observed, this can
have serious or even fatal consequences and damage the
installations.
Never exceed the specified maximum operating pressures.
Check the maximum permissible test pressures on the high
and low pressure sides, consulting the instructions in this
manual and the pressures indicated on the unit's nameplate.
Do not unweld the refrigerant ductwork or any refrigerant
circuit component or cut these with a torch until all refrigerant
(liquid and vapour) as well as the oil have been removed from
the heat pump. Traces of vapour should be displaced with
dry nitrogen. Refrigerant in contact with an open flame
produces toxic gases.
The necessary protective equipment must be available, and
appropriate fire extinguishers for the system and the
refrigerant type used must be within easy reach.
Do not siphon refrigerant.
Avoid spilling liquid refrigerant on skin or splashing it into
the eyes. Use safety goggles and safety gloves. Wash any
fluid spills from the skin with soap and water.
If refrigerant enters the eyes, immediately flush the eyes
thoroughly with water and consult a doctor.
Any accidental release of refrigerant, whether this is caused
by a small leak 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
engineers for these units must:
-
Create a procedure to ensure medical attention is sought
before treating such injuries;
-
Provide first-aid equipment, including equipment for
treating eye injuries.
We recommend that standard EN 378-3 Annex 3 is applied.
Never apply an open flame or live steam to a refrigerant
container. This can result in dangerous overpressure.
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 standard NF E29-795. Any
refrigerant transfer and recovery operations must be carried
out using a suitable transfer unit. 3/8” SAE connectors on the
liquid, suction and discharge lines are available on all units
for connection to the transfer unit. The units must never be
modified to add refrigerant and oil charging, removal and
purging devices. All these devices are factory fitted on the
units. Please 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 components fitted to the refrigerant
circuit or fittings while the machine is under pressure or while
it is running. Check that there is zero pressure in the circuit
and that the unit has been shut down and deenergized before
removing components or opening a circuit. When the
refrigerant circuit is opened to carry out a repair, see the
blanketing recommendations in the paragraph on
“Maintenance safety considerations”.
Do not attempt to repair or recondition a valve if there has
been any corrosion or build-up of foreign material (rust, dirt,
scale, etc.) on the valve body or mechanism. If necessary,
replace the device.
Do not install relief 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.
The ducts can break under the pressure and release
refrigerant, causing injuries.
Do not climb on a machine. Use a platform to work at height.
Use mechanical lifting equipment (crane, hoist, winch, etc.)
to lift or move heavy components.
For lighter components, use lifting equipment if there is any
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 original equipment's specifications.
Do not drain the heat transfer fluid circuit without informing
the installation site technical maintenance department or
other competent body first.
Close the shut-off valves on the water inlet and outlet and
drain the unit's hydraulic circuit before working on the
components installed on the circuit (screen filter, pump, water
flow sensor, etc.).
Periodically inspect all valves, fittings and pipes on the
refrigerant and hydraulic circuits to ensure that they do not
show any signs of corrosion or leaks.
It is recommended that ear defenders are worn when working
near the unit if it is running.
1 - INTRODUCTION
7
Содержание Carrier 30RQM 160
Страница 63: ......
