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1 - SAFETY CONSIDERATONS
1.2 - Refrigerant safety considerations
Use safety goggles and safety gloves.
All precautions concerning handling of refrigerant must be
observed in accordance with local regulations.
If a leak occurs or if the refrigerant becomes contaminated
(e.g. by a short circuit in a motor), and before any intervention,
remove the complete charge using a recovery unit and store the
refrigerant in mobile containers. The compressors cannot transfer
the whole refrigerant charge and can be damaged if used to
pump-down. The refrigerant charge should not be transferred to
the high-pressure side.
Detect and repair the leak, check the type of refrigerant in the
machine and then recharge the machine/circuit with the total
charge, as indicated on the unit nameplate. Do not top up the
refrigerant charge. Only charge the liquid refrigerant given on the
nameplate at the liquid line.
Charging any refrigerant other than the original type 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, which are
completely incompatible with mineral oils.
Do not unweld the refrigerant pipework or any refrigerant
circuit component or cut these with a torch until all refrigerant
(liquid and vapor) as well as the oil have been removed from
the unit. Traces of vapor should be displaced with dry
nitrogen. Refrigerant in contact with an open flame produces
toxic gases.
Do not siphon refrigerant.
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, may cause any
personnel exposed to experience heart palpitations, faintness,
frostbite and burns. Always take any such event seriously.
Installers, owners and especially service engineers for these units
must:
■ Create a procedure to ensure medical attention is sought before
treating any symptoms;
■ Provide first aid equipment, flush the eyes and skin immediately
if splashed with refrigerant, and seek medical attention.
We recommend that standard EN 378-3 Annex 3 is applied.
Ensure there is sufficient ventilation if the unit is installed in an
enclosed area. In gas form, refrigerant is heavier than air and,
if allowed to accumulate in a confined area, it can reduce the
quantity of oxygen in the air, causing respiratory issues.
The refrigerant used in the units in this range is R1234ze(E).
Special equipment must be used when working on the refrigerant
circuit (pressure gauge, charge transfer equipment, etc.).
Do not clean the unit with hot water or steam. This may cause
the refrigerant pressure to rise.
NOTE: If a liquid line valve is present, never leave refrigerant
in liquid form between this closed valve and the expansion
valve as the change in temperature may cause the liquid to
expand, rupturing this section of the circuit. This valve is
situated on the liquid line before the filter drier.
Never apply an open flame or pressurized steam to a
refrigerant container. Dangerous overpressure can result. If
it is necessary to heat the refrigerant, only use liquid hot
water.
The standard NF E29-795 describes the 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. If any damage
is caused to the equipment, the refrigerant must be changed in
accordance with this standard, or an analysis of the fluid must be
performed by a specialist laboratory.
Any refrigerant transfer and recovery operations must be carried
out using a transfer unit.
Service valves are positioned on the liquid, suction and discharge
lines and 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. These units have the
required openings. Refer to the certified dimensional
drawings.
It is dangerous and illegal to re-use disposable (non-
returnable) cylinders or attempt to refill them. When the
cylinders are empty, evacuate the remaining gas pressure,
fill out the relevant paperwork and hand them over to an
approved recovery agency. Do not incinerate.
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