Mitsubishi Electric CLIMAVENETA Series General Manual For Installation page 20

C0210101-07-16-EN
3.3 Access to the unit
The unit must be placed in an area where only the OPERATORS, MAINTENANCE PEOPLE and TECHNICIANS can gain access to it; otherwise it
must be surrounded by a fence that is at least 2 metres from the external surface of the machine.
The staff of the INSTALLER or any other visitors must always be accompanied by an OPERATOR. For no reason whatsoever must non-authorised
persons be left on their own with the unit.
The MAINTENANCE MAN must limit him/herself to the controls of the unit only; the only panel that can be opened by him/her is the one that
accesses the control module - no other must be touched. The INSTALLER must limit him/herself to connecting the plant to the unit.
Access the unit using the relative personal protective equipment and only after having read and understood the documents and instructions, which
must always be kept close at hand.
3.4 Precautions against residual risks
Prevention of residual mechanical risks

install the unit according to the instructions set out in this manual

regularly carry out all the maintenance operations foreseen in this manual

wear protective equipment (gloves, eye protection, hard hat, etc.) suited to the work in hand; do not wear clothes or accessories that can get
caught or sucked in by flows of air; tie back long hair before entering the unit

before opening the machine panelling make sure that it is firmly hinged to the machine

the fins on heat exchangers and the edges of metal components and panels can cause cuts

do not remove the guards from mobile components while the unit is operating

make sure that mobile component guards are fitted correctly before restarting the unit

fans, motors and belts drives might be running: before entering, always wait for these to stop and take appropriate measures to prevent them
from starting up

the surfaces of the machine and pipes can get very hot or cold and cause the risk of scalding

never exceed the maximum pressure limit (PS) of the water circuit of the unit indicated on the rating plate

before removing parts on the pressurised water circuits, close the section of the piping concerned and drain the fluid gradually to stabilise the
pressure at the atmospheric level

do not use your hands to check possible refrigerant leaks.
Prevention of residual electrical risks

disable the unit from the mains using the main switch before opening the control panel

check that the unit has been grounded correctly before starting it

install the machine in a suitable area; in particular, do not install it outdoors if it is intended for use indoors

do not use cables with inadequate sections nor extension cord connections, even for very short periods or emergencies

for units with power correction capacitors, wait 3 minutes after removing the electric power supply before accessing the inside of the switch
board

if the unit is equipped with centrifugal compressors with integrated inverter, disconnect it from the mains and wait a minimum of 15 minutes
before accessing it to carry out maintenance: residual energy in the components, which takes at least this length of time to dissipate, poses
the risk of electrocution
Prevention of other residual risks

the unit contains pressurised refrigerant gas: the pressurised equipment must not be touched except during maintenance, which must be
entrusted to qualified and authorised personnel

connect up the utilities to the unit following the indications set out in this manual and on the panelling of the unit itself

the water circuit contains harmful substances. Do not drink from the hydraulic circuit and make sure the material contained in it does not touch
your skin, eyes or clothing.

In order to avoid an environmental risk, make sure that any leaking fluid is collected in suitable devices in accordance with local regulations.

if a part needs to be dismantled, make sure it is correctly re-assembled before starting the unit

when the rules in force require the installation of fire-fighting systems near the machine, check that these are suitable for extinguishing fires on
electrical equipment and on the lubricating oil of the compressor and the refrigerant, as specified on the safety data sheets of these fluids (for
example, a CO2 extinguisher)

when the unit is equipped with devices for venting overpressure (safety valves): when these valves are triggered, the refrigerant gas is
released at a high temperature and speed; prevent the release of gas from harming people or objects and, if necessary, discharge the gas
according to the provisions of EN 378-3 and the local regulations in force, making sure in particular to discharge fluids that belong to a safety
class other than A1 into safe, open areas (see Tab.3)

keep all the safety devices in good working order and check them periodically according to the regulations in force

keep all lubricants in suitably marked containers

do not store inflammable liquids near the unit

solder or braze only empty pipes after removing all traces of lubricant oil; do not use flames or other heat sources in the vicinity of pipes
containing refrigerant fluid

do not use naked flames near the unit

the machinery must be installed in structures protected against atmospheric discharge according to the applicable laws and technical
standards

do not bend or hit pipes containing pressurised fluids

it is not permitted to walk or rest other objects on the machines

the user is responsible for overall evaluation of the risk of fire in the place of installation (for example, calculation of the fire load)

during transport, always secure the unit to the bed of the vehicle to prevent it from moving about and overturning

the machine must be transported according to the regulations in force taking into account the characteristics of the fluids in the machine and
the description of these on the safety data sheet

inappropriate transport can cause damage to the machine and even leaking of the refrigerant fluid. Before start-up, the machine must be
checked for leaks and repaired accordingly.

the accidental discharge of refrigerant in a closed area can cause a lack of oxygen and, therefore, the risk of asphyxiation: install the
machinery in a well ventilated environment according to EN 378-3 and the local regulations in force.

the installation must comply with the requirements of EN 378-3 and the local regulations in force; in the case of installations indoors, good
ventilation must be guaranteed and refrigerant detectors must be fitted when necessary.

unless arranged otherwise with Climaveneta, the machine be installed in environments where there is no risk of explosion (SAFE AREA)
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