AERMEC ANL 152 Manuale di installazione - Pagina 9

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AERMEC ANL 152 Manuale di installazione
ANL-ANLH 020-202
WARNING
WARNING
We recommend a service log book is
provided for the unit (responsibility
of the user) to keep records of any
works on the unit, which will aid
maintenance and repair works. Note
in the service log book date, type of
works (routine maintenance, inspec-
tion or repair), describing the event
and the measures taken.
WARNING
It is FORBIDDEN to charge with
refrigerant circuit with a refrigerant
type different to that indicated. Us-
ing a different refrigerant can cause
serious damage to the unit.
1608. 6755441_02
10.

ROUTINE MAINTENANCE

It is forbidden to carry out any cleaning operation
before isolating from the power supply
Confirm no voltage is present before commencing
works.
Periodic maintenance is a fundamental requirement to
ensure efficient unit operation both in terms of opera-
tion and energy efficiency.
10.1. HYDRAULIC CIRCUIT
1.
Water circuit is filled.
2.
Water filter is clean.
3.
Operation of the differential pressure or flow
switch.
4.
Absence of air in the system (vent).
5.
Water flow rate is always constant through the
evaporator.
6.
Condition of the hydraulic piping insulation.
7.
required.
10.2. ELECTRIC CIRCUIT
1.
Operation of safeties.
2.
Power supply voltage.
3.
Electrical power input.
4.
Tightness of connections and terminals.
5.
Operation of the compressor crankcase heater.
10.3. REFRIGERANT CIRCUIT
1.
State of compressors.
2.
Efficiency of the plate heat exchanger.
3.
Operating pressures.
4.
Leaks to confirm the correct operating refriger-
ant charge.
5.
Operation of the high and low pressure pres-
sostats
6.
Efficient operation of the filter drier.
10.4. MECHANICAL CHECKS
1.
1
.
cal panel and external panelling of the unit. Poor
fixings cause noise and abnormal vibrations.
2.
The state of the unit structure.
Treat any parts showing signs of corrosion with
the appropriate paints to reduce or eliminate
rust.
11.

SPECIAL MAINTENANCE

The ANL units are factory charged with R410A and
tested. In normal operation they therefore do not
require any intervention from the technical assistance
service in relation to the refrigerant charge. Over time
some small leaks can appear, resulting in refrigerant
discharges of the circuit and causing a malfunction of
the unit. In this case the leaks have to be found and
repaired and the unit recharged in accordance, and as
required, under current legislation and good working
practices.
12.
DISPOSAL
Ensure that the disposal of the unit is carried out in
accordance with the current legal requirements.
EN
of compressors and electri-
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