Access To The Unit; General Precautions; Precautions Against Residual Risks - Johnson Controls cwp series Installations- Und Wartungshandbuch

Safety
ENGINEER: means a person authorised directly by
Itelco-Clima or, in all EC countries, excluding Italy,
under his full responsibility, by the distributor of Itel-
co-Clima product, to perform any routine and extra-
ordinary maintenance operations, as well as any
regulation, control, servicing operations and the re-
placement of pieces, as may be necessary during the
life of the unit.

2.3 Access to the unit

The unit must be placed in an area which can be ac-
cessed also by OPERATORS and ENGINEERS; oth-
erwise the unit must be surrounded by a fence at not
less than 2 meters from the external surface of the
machine.
OPERATORS and ENGINEERS must enter the fenced
area only after wearing suitable clothing (safety
shoes, gloves, helmet etc.). The INSTALLER personnel
or any other visitor must always be accompanied by
an OPERATOR.
For no reason shall any unauthorised personnel be
left alone in contact with the unit.

2.4 General precautions

The OPERATOR must simply use the controls of the
unit; he must not open any panel, other than the one
providing access to the control module.
The INSTALLER must simply work on the connections
between plant and machine; he must not open any
panels of the machine and he must not enable any
control.
When you approach or work on the unit, follow the
precautions listed below:
do not wear loose clothing or jewellery or any oth-
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er accessory tat may be caught in moving parts
wear suitable personal protective equipment
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(gloves, goggles etc.) when you have to work in
the presence of free flames (welding operations) or
with compressed air
if the unit is placed in a closed room, wear ear pro-
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tection devices
cut off connecting pipes, drain them in order to
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balance the pressure to the atmospheric value be-
fore disconnecting them, disassemble connections,
filters, joints or other line items
do not use your hands to check for any pressure
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drops
use tools in a good state of repair; be sure to have
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understood the instructions before using them
be sure to have removed all tools, electrical cables
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and any other objects before closing and starting
the unit again
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2.5 Precautions against residual risks

Prevention of residual risks caused by the
control system
be sure to have perfectly understood the operating
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instructions before carrying out any operation on
the control panel
when you have to work on the control panel, keep
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always the operating instructions within reach
start the unit only after you have checked its perfect
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connection to the plant
promptly inform the ENGINEER about any alarm
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involving the unit
do not reset manual restoration alarms unless you
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have identified and removed their cause
Prevention of residual mechanical risks
install the unit according to the instructions provid-
h
ed in this manual
carry out all the periodical maintenance opera-
h
tions prescribed by this manual
wear a protective helmet before accessing the inte-
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rior of the unit
before opening any panelling of the machine,
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make sure that it is secured to it by hinges
do not remove the guards from moving elements
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while the unit is running
check the correct position of the moving elements'
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guards before restarting the unit
Prevention of residual electrical risks
connect the unit to the mains according to the in-
h
structions provided in this manual
periodically carry out all the maintenance opera-
h
tions specified by this manual
disconnect the unit from the mains by the external
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disconnecting switch before opening the electrical
board
check the proper grounding of the unit before start-
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up
check all the electrical connections, the connecting
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cables, and in particular the insulation; replace
worn or damaged cables
periodically check the board's internal wiring
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do not use cables having an inadequate section or
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flying connections, even for limited periods of time
or in an emergency