D-EIMHP01601-22_01EN 20/26
1.
the current absorbed by the compressor must be compared to the rated value. Normally the value of the absorbed current
is lower than the rated value that corresponds to the absorption of the full load compressor at the maximum operating
conditions.
2.
at least once every three months all the security checks must be made to verify their functionality. Each appliance, with
aging, can change its point of operation and this must be monitored to adjust it or replace it. The pump interlocks and flow
switches must be checked to make sure that they interrupt the control circuit if they intervene.
13.3
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.
However, the unit requires maintenance even during the warranty period, from the time of installation and not just
from the commissioning date.
We strongly advise stipulating a maintenance contract with a service authorized by the
manufacturer to ensure efficient and problem free service, thanks to the expertise and experience of our personnel.
It must be borne in mind that operating the unit in an inappropriate manner, beyond its operating limits or not performing proper
maintenance according to this manual can void the warranty. Observe the following points, 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 an 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
BPHE
inlet.
6.
The value of the
BPHE
water flow must be included in the declared range for the unit considered, refer to the
CSS
selection
software.
Table 9
– Standard Routine Maintenance Plan
Monthly Yearly/Seasonal
List of Activities
Weekly
(Note 1)
(Note 2)
General:
Reading of operating data (Note 3)
X
Visual inspection of unit for any damage and/or loosening
X
Verification of thermal insulation integrity
X
Cleaning
X
Paint where necessary
X
Analysis of water (4)
X
Check of flow switch operation
X
Electrical Installation:
Verification of control sequence
X
Verify contactor wear
– Replace if necessary
X
Verify that all electrical terminals are tight
– Tighten if necessary
X
(Quarterly)
Clean inside the electrical panel
X
Visual inspection of components for any signs of overheating
X
Verify operation of compressor and electrical resistance
X
Refrigeration circuit:
Check for any refrigerant leakage (leak test)
X
Analyse compressor vibrations
X
Hydraulic circuit:
Check for any water leakage
X
Check hydraulic connections
X
Check the pressure at the exchangers water inlet
X
Clean the water filter
X
Check the glycol concentration
X
Check the water flow rate
X
BPHE
:
Check the cleaning of the
BPHE
X
Notes:
1. Monthly activities include all the weekly ones.
2. The annual (or early season) activities include all weekly and monthly activities.
3. Daily reading of the operating values of the unit allows maintaining high observational standards.
4. Check for any dissolved metals.
5. Clean condenser banks with clean water and water heat exchangers with appropriate chemicals. Particles and fibres could clog up the exchangers,
especially for water exchangers pay attention if water rich in calcium carbonate is used. An increase in pressure drops or a decrease in thermal
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