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1 - INTRODUCTION
All installation parts must be maintained by the personnel in
charge, in order to avoid material deterioration and injuries to
people. Faults and leaks must be repaired immediately. The
authorized technician must have the responsibility to repair the
fault immediately. Each time repairs have been carried out to the
unit, the operation of the protection devices must be re-checked.
Comply with the regulations and recommendations in unit and HVAC
installation safety standards, such as: EN-378, ISO-5149, etc.
If a leak occurs or if the refrigerant becomes contaminated (e.g.
by a short circuit in a motor) remove the complete charge using
a recovery unit and store the refrigerant in mobile containers.
Repair the leak detected and recharge the circuit with the total
quantity of the original refrigerant (either R1234ze(E) or R515B),
as indicated on the unit name plate. Certain parts of the circuit
can be isolated. Only charge liquid refrigerant at the liquid line.
Ensure that you are using the correct refrigerant type before
recharging the unit.
Charging any refrigerant other than the original charge type stated
on the nameplate will impair machine operation and can even lead
to a destruction of the compressors. The compressors operating
with this refrigerant type are lubricated with a specific synthetic
polyolester oil.
Do not use oxygen to purge lines or to pressurize a machine
for any purpose. Pressurised air mixtures or gases containing
oxygen can be the cause of an explosion. Oxygen reacts
violently with oil and grease. Nitrogen should be used to
purge the system. It should also be used during brazing.
Never exceed the specified maximum operating pressures.
Verify the allowable maximum high- and low-side test
pressures by checking the instructions in this manual and
the pressures given on the unit name plate.
Do not use air for leak testing. Use only refrigerant or dry
nitrogen.
Do not unweld or flamecut the refrigerant lines or any
refrigerant circuit component until all refrigerant (liquid and
vapour) has been removed from chiller and the system has
been purged with nitrogen. Traces of vapour should be
displaced with dry air nitrogen. Refrigerant in contact with
an open flame produces toxic gases.
The necessary protection 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 contact with liquid refrigerant on the skin or splashing
it into the eyes. Use safety goggles. Wash any spills from the
skin with soap and water. If liquid refrigerant enters the eyes,
immediately and abundantly flush the eyes with water and
consult a doctor.
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 engineers for these
units must:
- Seek medical attention before treating such injuries.
- Have access to a first-aid kit, especially for treating eye
injuries.
We recommend to apply standard EN-378.
Never apply an open flame or live steam to a refrigerant
container. 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 standard NF E29-795.
Any refrigerant transfer and recovery operations must be
8
carried out using a transfer unit. An SAE connector
(respectively 1/2" for R1234ze(E) and 3/8" for R515B) on the
manual liquid line valve is supplied with all units for
connection to the transfer station. The units must never be
modified to add refrigerant or oil charging devices, removal
or purging devices. All these features are provided with the
units. Please refer to the certified dimensional drawings for
the units.
Never use the compressor as a vacuum pump. It would
damage the compressor.
Do not re-use disposable (non-returnable) cylinders or
attempt to refill them. It is dangerous and illegal. Proper
refrigerant cylinders designated and marked for the original
refrigerant stated on the nameplate should be used. When
cylinders are empty, evacuate the remaining gas pressure,
and move the cylinders to a place designated for their
recovery. Do not incinerate.
ATTENTION: Only use refrigerant, in accordance with AHRI
700-2014 (Air conditioning, Heating and Refrigeration
Institute). The use of any other refrigerant may expose users
and operators to unexpected risks.
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 has been purged
with nitrogen 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 relief valves in
series or backwards.
ATTENTION: No part of the unit must be used as a walk-way,
rack or support. Periodically check and repair or if necessary
replace any component or piping that shows signs of damage.
The refrigerant 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 shutoff valves and purge
the unit water circuit, before working on the components
installed on the circuit (screen filter, pump, water flow switch,
etc.).
Do not loosen the water box bolts until the water boxes have
been completely drained.
Periodically inspect all valves, fittings and pipes of the
refrigerant and hydraulic circuits to ensure that they do not
show any corrosion or any signs of leaks.
It is recommended to wear ear defenders, when working near
the unit and the unit is in operation.
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