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Open the switchbox (only trained technicians should
perform this operation)
Open compressor fuses (by pulling the fuse holders)
or compressor circuit breakers
Power on the chiller
Keep the chiller powered on for 1 hour at least (this
allows inverter heaters to warm-up the inverter).
Close fuse holders
Close the switchbox
Service and limited warranty
All units are factory-tested and guaranteed for 12 months as of
the first start-up or 18 months as of delivery.
These units have been developed and constructed according
to high quality standards ensuring years of failure-free
operation. It is important, however, to ensure proper and
periodical maintenance in accordance with all the procedures
listed in this manual and with good practice of machines
maintenance.
We strongly advise stipulating a maintenance contract with a
service authorized by the manufacturer in order to ensure
efficient and problem-free service, thanks to the expertise and
experience of our personnel.
It must also be taken into consideration that the unit requires
maintenance also during the warranty period.
It must be borne in mind that operating the unit in an
inappropriate manner, beyond its operating limits or not
Table 2 - Routine maintenance programme
General:
Reading of operating data (Note 3)
Visual inspection of unit for any damage and/or loosening
Verification of thermal insulation integrity
Clean and paint where necessary
Analysis of water (6)
Check of flow switch operation
Electrical:
Verification of control sequence
Verify contactor wear – Replace if necessary
Verify that all electrical terminals are tight – Tighten if necessary
Clean inside the electrical control board
Visual inspection of components for any signs of overheating
Verify operation of compressor and oil heater
Measure compressor motor insulation using the Megger
Clean air intake filters of the electrical panel
Verify operation of all ventilation fans in the electrical panel
Verify operation of inverter cooling valve and heater
Verify status of capacitors in the inverter (signs of damage, leaks, etc)
Refrigeration circuit:
Check for any refrigerant leakage
Verify refrigerant flow using the liquid sight glass – Sight glass full
Verify filter dryer pressure drop
Verify oil filter pressure drop (Note 5)
Analyse compressor vibrations
Analyse compressor oil acidity (7)
Condenser section:
Clean condenser banks (Note 4)
Verify that fans are well tightened
Verify condenser bank fins – Comb if necessary
Notes:
1.
Monthly activities include all the weekly ones.
2.
The annual (or early season) activities include all weekly and monthly activities.
3.
Unit operating values should be read on a daily basis thus keeping high observation standards.
4.
In environments with a high concentration of air-borne particles, it might be necessary to clean the condenser bank more often.
5.
Replace the oil filter when the pressure drop across it reaches 2.0 bar.
6.
Check for any dissolved metals.
0,10 : No action
7.
TAN (Total Acid Number) :
Between 0.10 and 0.19 : Replace anti-acid filters and re-check after 1000 running hours. Continue to replace filters until the TAN is lower
than 0.10.
0,19 : Replace oil, oil filter and filter dryer. Verify at regular intervals.
All manuals and user guides at all-guides.com
List of Activities
performing proper maintenance according to this manual can
void the warranty.
Observe the following points in particular, in order to conform
to warranty limits:
1.
The unit cannot function beyond the specified limits
2.
The electrical power supply must be within the voltage
limits and without voltage harmonics or sudden changes.
3.
The three-phase power supply must not have un
unbalance between phases exceeding 3%. The unit must
stay turned off until the electrical problem has been
solved.
4.
No safety device, either mechanical, electrical or
electronic must be disabled or overridden.
5.
The water used for filling the water circuit must be clean
and suitably treated. A mechanical filter must be installed
at the point closest to the evaporator inlet.
6.
Unless there is a specific agreement at the time of
ordering, the evaporator water flow rate must never be
above 120% and below 80% of the nominal flow rate.
Periodic obligatory checks and starting up of
appliances under pressure
The units are included in category IV of the classification
established by the European Directive PED 2014/68/EU.
For chillers belonging to this category, some local regulations
require a periodic inspection by an authorized agency. Please
check with your local requirements.
Weekly
X
X
D-EIMAC00908-16EU - 18/250
Monthly
Yearly/Seas
(Note 1)
Onal (Note 2)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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