General Safety Standards - Keyfrost KBA Manuel

The machine is a machine that is ready for operation when installed and it has been manufactured exclusively for use as follows:
TO MAINTAIN A DETERMINED TEMPERATURE IN A COLD ROOM SUITED FOR THIS USE
This machines are destined for installation in cold rooms.
The cyclic defrosting system is fully automatic.
The machine operates using a refrigerator compressor with reciprocating motion and which operates using the power supply mains
(mono- or three-phase) and refrigerant. The refrigerant flows into the evaporator and cools its surrounding atmosphere (by absorbing
the heat). The "hot" fluid is sucked in/compressed by the compressor and sent to the exchange battery "condenser" to regain its cooling
capacity. The cycle is then repeated.

General safety standards

1.0.3
The machine must only be used by those personnel who are aware of its specific characteristics and of the main safety procedures.
Accident prevention rules and other health and safety requirements must always be respected. Any unauthorised alteration made to the
machine will absolve the Manufacturer from any responsibility regarding possible resulting damages.
WE RECOMMEND, THEREFORE, THE READING OF THE MANUAL AND THE OBSERVATION OF ALL THE INSTRUCTIONS IT CONTAINS.
• Before each operation equip yourself with adequate personal protection gear such as: dielectric gloves, safety glasses, insulating
helmet (dielectric B class), safety shoes. All personal protection gear must be always perfectly undamaged. If not, one must ask for
a replacement at the responsible personnel. All electrician tools must be equipped with insulated handles and must bear the quality
symbol of the national brand or equivalent. The insulation handles must be undamaged and in perfect state, otherwise they must NOT
be used and they should be reported to the representative for their substitution. The portable electric tools (drills, grinders, soldering
iron, etc) must be used only if equipped with the right ground connection or if equipped with double safety insulation (symbol: double
square one inside the other, as reported on the tool itself). The control instruments (testers, etc) used to verify the presence of tension
in the electrical circuit must be periodically verified with other "example instruments" to verify their efficiency. The stairs that the
electrician may use during his work must be in insulation material.
• In case of maintenance action on the cooling circuit it might be necessary to empty the unit bringing it to the atmospheric pressure.
The refrigerant fluid must not be dispersed in the environment but must be recovered with the proper tools by qualified technicians.
The charge of refrigerant must be done respecting the type and quantity written on the label of the unit. No alterations or
modifications on the refrigeration circuit or their components are allowed.
• Before connecting to the power supply mains, make sure that the voltage and frequency correspond to those given on the data plate
fixed to the side of the machine. The permitted tolerances are
- (+/- 10%) of the nominal voltage
- (+/- 1%) of the continuos rated frequency
• Do not approach electrical parts with either wet hands or bare feet.
• Don't ever wet electrical parts of the unit.
• In order to protect the unit from eventual overloads or short-curcuits, the connection to the electrical line must be done through a
magnetothermic switch or a switch with fuses if possible placed near the same unit (the voltage drop on the line must be such to leave
the supply voltage to the terminals of the unit inside the tolerance limits). When not already prescribed by electrical safety norms, it is
requested to adopt, upstream the system, a residual current device with high sensitivity (30mA) with manual reset.
The device for electrical protection must be chosen in such a way to:
- avoid nuisance trippings during the working of the unit (the thermal intervention threshold, accurately derated, must be bigger than
the nominal current "In" reported on the label of the unit; in case of magnetothermic switch use, we suggest to adopt a dispositive
with an intervention curve C);
- protect the electrical ducts from overload (with a proper coordination between switch and supply cable);
- guarantee a suitable protection against short-circuit and electrical faults (adequate short circuit interruption rate at installation point
and proper coordination with the downstream system).
The unit must be installed in a point of the system where the expected short-circuit current does not exceed the short circuit withstand
of the unit itself (Icc value reported on the label). If otherwise, it is necessary to install a protection dispositive that presents the
following characteristics:
- peak value of the limited current "Ip" not over 10kA (in correspondence of the expected short-circuit current at installation point).
- I t (limitation class 3 or equivalent).
2
• Always connect the equipment to an efficient earthing system installed according to the relative standards. Do not use sockets or plugs
that are not earthed.
• Always connect the equipment to the power supply mains following the colours of the supply cable wires
green/yellow =
blue =
When in a cold room there are more than one unit it is advisable that each unit has its own protective device.
• In case of power with generator make sure that the electric power is sufficient to permit a safe starting of the unit or that during the
first moments of the machine start-up are respected tolerances in terms of voltage and frequency.
• In the event that it is necessary to extend the power supply cable and/or auxiliaries, first contact our Technical Department.
• Before carrying out any maintenance operations, disconnect the equipment from the mains power supply :
- Press the ON/OFF key to switch off the display;
- Put the disconnecting device in OFF position (if fitted) / Remove the plug (if fitted);
- Remove voltage using the thermomagnetic circuit breaker.
• Use gloves when carrying out maintenance operations in proximity to "Extreme Temperatures".
• Do not insert tools or other objects into the fan protection grids.
• Do not us the unit if without grills or protections.
• Don't clean the unit with direct or pressurized water jets (that can damage fins and mobile parts) or with aggressive substances.
• To ensure correct operation of the machine, do not block the air vents when it is operating.
• The unit is not made to work in salty environments or in presence of copper and aluminum corrosive substances. If that is the case the
exposed parts must be protected in the most ideal way.
• Installation and special maintenance operations must be carried out by authorised, qualified technical personnel with good knowledge
of refrigerating and electrical systems.
• For every unexpected use, contact the producer for information about the possible contraindications and the related dangers.other
than that permitted shall be considered improper, and in this case the Manufacturer will decline all liability.
Manual
protective earth wire
neutral
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