CLIMAVENETA ACCURATE, Руководство пользователя и по обслуживанию

Страница: 18 / 28

16
English 01/07
ACCURATE AX* - AW*
Checking and cleaning the condenser coils
Authorised personnel: maintenance mechanic
Checks:
In the hotter period, when the unit operates at maximum capaci-
ty, the condensing coils must be able to offer the maximum heat
exchange.
Normally installed outside or communicating with the outside,
these may pick up dirt such as paper, dry leaves and dust, thus
reducing the heat exchange.
Make sure that this situation does not arise.
Failure to perform maintenance will cause the activation of the
high pressure switch and the unit to shutdown.
Frequently check the condition of the heat exchanger during the
poplar pollination period or the autumn (falling leaves).
Remove any objects accumulated on the coil and wash with a jet
of water.
These operations must be carried out with the unit off and after
having made sure that the appliance is disconnected from the
power supply.
Checking the water-cooled condensers for fouling
Authorised personnel: maintenance mechanic
Checks:
To check the water-cooled condensers for fouling, simply check
the water inlet and outlet temperature and compare it against
the condensing temperature.
Normally, for good heat exchange, the difference between the
water outlet temperature and the condensing temperature must
be 5.8°C.
Increases in these values, over time, indicate a reduction in effi-
ciency and consequently the fouling of the condenser.
The condenser is cleaned by chemical washing and must be per-
formed by specialist personnel.
This operation must be carried out with the unit off and after
having made sure that the appliance is disconnected from the
power supply).
Checking and cleaning the drains
Authorised personnel: maintenance mechanic
Checks:
All the water drains (humidifier and condensate) must ensure
perfect drainage, to avoid flooding in the room.
When the humidifiers drain the water, they discharge a quantity
of lime scale that depends on the hardness of the supply water.
This lime scale may accumulate in the bottom of the drain hose
and block the flow of water.
If cleaning is required, add ordinary descaler to the section of cir-
cuit involved.
This operation must be carried out with the unit off and after
having made sure that the appliance is disconnected from the
power supply.
Checking the drive belt
Authorised personnel: maintenance mechanic
Checks:
On the units with fans coupled to the electric motor by pulleys
and drive belts, after a certain number of operating hours the belt
may become loose, sliding on the pulleys and causing excessive
wear.
This situation, if it persists, causes overheating and consequently
the breakage of the belt.
Loosening can be resolved using the special belt tightener fitted
on the appliance (this operation must be carried out with the
unit off and after having made sure that the appliance is discon-
nected from the power supply).
Check the tension of the drive belts once a month.
Avoid excessively tightening the belts, as this may cause damage
to the bearings.
General examination of operation
Authorised personnel: system supervisor
Checks:
This is a general examination aimed at comparing the operation
of the appliance with the last check performed.
Consequently, any differences in the operating characteristics
over time can be highlighted.
A detailed and periodical visual check of the appliance and gener-
al cleaning are always important to ensure correct operation.
The above-mentioned operations can in general be performed
once a month.
Naturally, in special situations and specific installations the fre-
quency may change.
A well maintained system is unlikely to cause disruptions and
stoppages to the production cycles.
Visual check of the condition of the pressurised contain-
ers
Authorised personnel: system supervisor
Checks:
Check the condition of the pressurised containers at least once a
year (if these are fitted).
It is very important to check that rust does not form on the sur-
face, that there is no corrosion and that there are no visible
deformations.
If not controlled and stopped, surface oxidation and corrosion
will over time cause a decrease in the thickness of the container
and a consequent reduction in its mechanical strength.
Protect with paint and/or corrosion proofing products.
In the event of visible deformations, stop the unit and contact the
nearest service centre.