Airwell DFO 5 - 9 - 17, Инструкция по установке и эксплуатации

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9 - MAINTENANCE
9.1 GENERAL
Maintenance must be done by authorized centres or by
qualified personnel
The maintenance enables:
•
maintain the unit efficiency
•
reduce the deterioration speed to whom every equipment
is subject over time
•
assemble information and data to understand the state of
the unit efficiency and avoid possible damages
9.6 WATER EXCHANGER
The inspections should be carried out at least:
•
- Every year for only the cooling units
•
- Every six months for the cooling and warming units
The frequency, however, depends on the use.
In the event of frequent use it is recommended to plan
inspections at close intervals:
•
- frequent use (continuous or very intermittent use, near
the operating limits, etc)
•
- critical use (service necessary).
Before checking, please verify the following :
•
the unit should be installed properly and in conformity with
this manual.
•
the electrical power supply line should be sectioned at the
beginning.
•
the line sectioning device is open, locked and equipped
with the suitable warning signs.
•
ensure no voltage is present .
After turning off the power, wait at least 5 minutes before
accessing to the electrical panel or any other electrical
component.
Before accessing check with a multimeter that there are no
residual stresses
9.2 INSPECTIONS FREQUENCY
9.3 MACHINE BLOOKLET
It’s advisable to create a machine booklet to take notes of the
unit interventions.
In this way it will be easier to adequately note the various
interventions and aid any troubleshooting.
Report on the booklet:
•
data
•
type of intervention effected
•
intervention description
•
carried out measures etc..
If a long period of inactivity is foreseen:
•
Turn of the power in order to avoid electrical risks or
damages by lightning strike
•
avoid the risk of frost (empty or add glycol to the parts of
the system exposed to temperatures below zero, maintain
any anti-freeze resistances powered)
It’s recommended that the starter after the period of detention
is made by a qualified technician, especially after seasonal
9.4 STANDBY MODE
Accidental contact with the exchanger fins can cause cuts:
wear protective gloves.
•
It is extremely important that the battery gives the
maximum thermal exchange; therefore, its surface must be
cleaned from dust and deposits.
•
Remove all impurities from the surface.
•
An aspirator can be used to suck impurities from the air
input side.
•
Verify that the aluminium fins are not bent or damaged. In
the event of damages, contact an authorised assistance
centre that can 'iron out' the battery in order to allow an
optimal airflow
It is very important for the exchanger to be able to provide the
maximum thermal exchange. Therefore, it is essential for the
inner surfaces to be clean of dirt and incrustations.
•
Periodically check the difference between the temperature
of the supply water and the condensation temperature. If
the difference is greater than 8 °C – 10 ° C it is advisable
to clean the exchanger.
The clearing must be effected:
•
With circulation opposite to the usual one
•
With a speed at least 1,5 times higher than the nominal
one
•
With an appropriate product moderately acid (95% water +
5% phosphoric acid
•
after cleaning rinse with water to avoid any detergent
residues
9.5 ELECTRIC FANS
9.7 ENERGY EXCHANGER AIR BATTERY
Check:
•
ensure that the fans are well fixed
•
the fan bearings (evident by noise and anomalous
vibrations ).
9.8 CONDENSATE DISCHARGE
Dirt or scale could cause blockages.
Also in the drain pain can proliferate microorganisms and
mold.
To provide for a periodic cleaning with appropriate detergents
and in case a disinfection with sanitizing products. When the
clearing is finished, put some water in the drain pain to check
the regular down flow.
stops or seasonal switch.
When restarting, refer to that indicated in the START-UP
section .
Schedule technical assistance in advance to avoid hitches
and to guarantee that the system can be used when required.