Unit booklet
Foresee a unit schedule to keep trace of the interventions
made on the unit.
In this way, it will be easier to adequately schedule the
various interventions and facilitate any troubleshooting.
On the schedule note:
•
date
•
intervention description
•
carried out measures etc.
Standby mode
If foreseen a long period of inactivity:
•
turn off the power
•
Prevent the risk of freezing (use glycol or empty the
system)
disconnect voltage to avoid electric risks or damages fol
-
lowing lightning.
With lower temperatures keep heaters turned on in of the
electrical panel (option).
It is recommended to have a qualified technician start the
system after a period of inactivity, especially after sea
-
sonal stops or for seasonal switch-overs.
Proceed as described in the “Startup” section for startup (7).
Plan the technician’s deployment in advance to avoid
breakdowns and to be able to use the system again when
needed.
System drain
The system must be drained only if necessary.
Avoid draining the system periodically; corrosive phe
-
nomena can be generated.
1. empty the system
2. Drain heat exchanger, use all existing valves and
threaded pins
3. blow the exchanger with compressed air
4. dry the exchanger with hot air; for greater safety, fill
the exchanger with glycol solution
5. Protect heat exchanger from air inlet
6. Remove drain plugs from the pumps
Any anti-freeze liquid contained in the system should not
be discharged freely as it is a pollutant. It must be collect
-
ed and reused.
Before start-up, wash the system.
It is recommended to have a qualified technician start the
system after a period of inactivity, especially after sea
-
sonal stops or for seasonal switch-overs.
Proceed as described in the “Startup” section for startup.
Plan the technician’s deployment in advance to avoid
breakdowns and to be able to use the system again when
needed.
Water side heat exchanger
The heat exchanger must allow maximum heat transfer,
so the internal surfaces must be clean and free of scale
deposits.
Periodically check the difference between the tempera
-
ture of the supply water and the condensation temper
-
ature: 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 % wa
-
ter + 5 % phosphoric acid)
•
after cleaning, rinse with water to prevent cleaning
agent residues from remaining.
Water filter
Check that no impurities prevent the correct passage of
water.
Flow switch
•
controls the operations
•
remove incrustations from the palette
Circulation pumps
Check:
•
no leaks
•
Bearing status (anomalies are highlighted by abnormal
noise and vibration)
•
The closing of terminal covers and the correct position
-
ing of the cable glands.
Insulations
Check the condition of the insulations: if necessary, apply
glue and renew the seals.
Safety valve
The pressure relief valve must be replaced:
•
if it has intervened
•
if there is oxidation
•
based on the date of manufacture, in compliance with
local regulations.
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4 221 546 / 00
MaInTEnanCE
Содержание Belaria fit 53
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