Trane CGCN Installation Operation & Maintenance page 17

The danger zone must be of a suitable size to avoid any contact, even accidental contact.
In the presence of safety valves without relevant remote controls, the operating area must be of a size which
considers a range of action of the discharge flow of 3 metres.
Trane declines any responsibility for damage to things and unauthorised personnel in case of absence of clear
and static limiting systems of the risk areas and of the relevant warning and danger signs.
General safety precautions
The operator must only intervene on the unit controls; he or she must not open any panels except for the one
which gives access to the command module.
The installer must only intervene on the connections between the plant and the machine; he or she must not open
any machine panels nor carry out any commands.
The following precautions should be made when approaching or working on the unit:
• do not wear jewellery, baggy clothes or any other accessory which can get caught up.
• Use appropriate protection (gloves, glasses etc.) when using an open flame (welding) or compressed air.
• If the unit is located in a closed environment, wear hearing protection.
• before disconnecting, removing tubes, filters, joints or other line parts intercept the connection tubes, empty
them until the pressure reaches that of the atmosphere.
• do not use your hands to check for possible pressure losses.
• always use tools which are in good condition; make sure the instructions have been fully understood before
using them.
• make sure that any tools, electrical cables or other loose objects have been removed before closing the unit
and starting it up again.
Precautions against risks due to the refrigerant
Safety data R410a
Toxicity
Not important
Splashes or sprinkles can cause chill burns. The risk of absorptions through the skin is not relevant.
Those refrigerants could take some lightly irritating effects and in liquid stage they have a strong skinning
effect. In this case it is necessary to rinse with fresh water the contaminated parts of the skin
Risks for skin touching
The refrigerant in liquid stage in contact with wet clothes cause freezing and adherence to the skin. In this
case it is necessary to put off the contaminated clothes to avoid freezing. Please contact a doctor in case of
irritation of the contaminated parts.
Vapours don't take any effect. Splashes or sprinklers can cause chill burns. In those cases it is necessary to
Risks for contact with
rinse the eyes with water or with solution for ocular washings for 10 minutes. The intervention of a doctor is
the eyes
needed.
Should it happen, it causes chill burns. It does not cause vomiting. The person must be kept awake. It is
Risks for ingestion needed to rinse the mouth with fresh water and to drink almost 0,25 litres. The intervention of a doctor is
useful.
High concentration of vapours in air can lead to anaesthetic effects up to a loss of conscience. Long
exposures could give rise to cardiac arrhythmia and sometimes even to death.
High concentrations can create a reduction of oxygen in air, with consequent possibility of suffocation.
Risks for inhalation
Should it happen the person must be taken to the open air and let him to take a rest.
Administer oxygen if needed. In case the breathing has interrupted or become irregular, it is necessary to
apply the artificial breathing. In case of cardiac arrest a heart massage must be applied. Contact a doctor
immediately.
Conditions to avoid
Use in presence of exposed flames, and of elevates levels of humidity.
Dangerous reactions
Possibility of violent reactions with the sodium, the potassium, the barium and with other alkaline
substances, incompatible materials and all the alloys containing more than 2% of magnesium.
Wear protection apparel and self-respirators. Insulate the source of the loss, if this operation can be done
Protection wearing -
in safety conditions. Small quantitative of refrigerant escaped at liquid state can be allowed to evaporate
Behaviour in case of
only if the room is well ventilated. In case of great losses ventilate the room immediately. Plug the loss
losses or escapes with sand, soil or other absorbent material; avoid that the liquid refrigerant can enter in water-drainages or
losing pools.
The best procedure is the recovery and the recycle. In case this is not possible the refrigerant must be
Disassembly
conferred to an accredited system for its destruction in order to neutralize acid and toxic by-products.