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1 - INTRODUCTION
RISK OF EXPLOSION:
Do not use oxygen to purge lines or to pressurize a machine
for any purpose. Oxygen gas reacts violently with oil, grease,
and other common substances.
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. 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 378-3 Annex 3.
Never apply an open flame or live steam to a refrigerant
container. Dangerous overpressure can result. If it is
necessary to heat refrigerant, use only warm water.
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 transfer unit. A 3/8" SAE connector 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, removal and purging devices. All these devices are
provided with the units. Please refer to the certified dimensional
drawings for the units.Do not re-use disposable (non-returnable)
cylinders or attempt to refill them. It is dangerous and illegal. When
cylinders are empty, evacuate the remaining gas pressure, and
move the cylinders to a place designated for their recovery. Do
not incinerate.
CAUTION:
Only use refrigerant R134a, 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 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.
CAUTION:
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.
7
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