Table of Contents
Advertisement
ANL - ANLH 020-202
WARNING
For 230V/1/50Hz units with
softstart, if power is removed
for reasons of fault or mainte-
nance, it is required to wait
5 minutes before re-applying
power to the unit to ensure
proper operation.
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 mainte-
nance and repair works. Note
in the service log book date,
type of works (routine mainte-
nance, inspection 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. Using a different
refrigerant can cause serious
damage to the unit.
30
10. ROUTINE MAINTENANCE / 11. SPECIAL MAINTENANCE / 12. DISPOSAL
10. ROUTINE MAINTENANCE
It is forbidden to carry out any clea-
ning operation before isolating from
the power supply
.
1
Confi rm no voltage is present before
commencing works.
Periodic maintenance is a fundamen-
tal requirement to ensure effi cient unit
operation both in terms of operation
and energy effi ciency.
The fundamental required annual
checks are:
10.1. HYDRAULIC CIRCUIT
CHECK:
1. Water circuit is fi lled.
2. Water fi lter is clean.
3. Operation of the differential pre
sure or fl ow switch.
4. Absence of air in the system (vent).
5. Water fl ow rate is always cons-
tant through the evaporator.
6. Condition of the hydraulic piping
insulation.
7. The percentage of anti-freeze li-
quid, as may be required.
10.2. ELECTRIC CIRCUIT
CHECK:
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
CHECK:
1. State of compressors.
2. Effi ciency of the plate heat exchanger.
3. Operating pressures.
4. Leaks to confi rm the correct ope-
rating refrigerant charge.
5. Operation of the high and low
pressure pressostats
6. Effi cient operation of the fi lter drier.
10.4. MECHANICAL CHECKS
CHECK:
1. Tightness of screws, of compres-
sors and electrical panel and ex-
ternal panelling of the unit.
Poor fi xings cause noise and ab-
normal 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 re-
quire any intervention from the tech-
nical assistance service in relation
to the refrigerant charge. Over time
some small leaks can appear, resul-
ting 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 re-
quired, 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.
Hide quick links:
Advertisement
Table of Contents
