Stulz Free-Air-3-IN, Руководство по эксплуатации, Страница: 24 / 31

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Free-AIr-3-IN
EN/02.2018 © STULZ SpA – all rights reserved
7. Maintenance
7.1. Safety instructions
Start-up and maintenance of Free-Air-3-IN units might be dangerous if they are not carried out with
the same precautions used for apparels with moving parts and electric components. Installation and
intervention on units must be made in full compliance with specific national regulations for accident
prevention, with particular reference on electric equipment. Failure to comply with these regulations
might be dangerous to people and environment.
Before any intervention on the unit, refer to the instructions on this manual, check data on the name-
plate and take any other precaution in order to guarantee optimal safety.
Maintenance interventions must be performed by authorized and qualified technicians.
Safety procedures
DANGer
Cut off the power supply to the unit before making any maintenance operation. A “DO NOT
SWITCH ON” warning sign must be clearly visible. ON-OFF key on display is only used to put
the unit is stand-by. It must not be considered as a safety device to switch off the unit before
maintenance.
Some verifications must be effected with the unit in operation (measuring current, pressures,
temperatures). In such a case, the unit must only be switched on at the master switch after all
mechanical connections have been carried out. The unit must be switched off immediately after
the measuring procedure.
Moving parts are totally automatic and highly reliable and ordinary maintenance is reduced to a
minimum. This maintenance, however, must be performed at the prescribed intervals. Failure to
perform maintenance compromises FCL operation and durability and invalidates warranty coverage.
7.2. Preventative maintenance schedule
Interval Operation
Every 3 months • FAN: check that fan motors and other components do not show abnormal vibrations or show signs of overheating.
• AIR FILTERS: check that air openings are clean and that dirt does not prevent the passage of air. Check air
pre-filter (if present) and clean it if necessary. Check air filter and clean or replace it if necessary. If filter needs to
be replaced, use a spare filter with the same dimensions and efficiency of the original one. Spare filters can be
ordered to STULZ Service Department.
Every year • ELECTRIC CIRCUIT: check that electric connections are tight, that switches, remote control switches and isolating
switches are operating and in good condition. Also check that the control board operates and perform a test of
alarm signals.
• MECHANICAL PARTS: clean the inner components of the system.
ATTeNTION
More frequent cleaning must be done if the unit works in particularly dirty environments or if
experience requires them.