Daikin EWAH TZ D Series, Инструкция по установке, эксплуатации и обслуживанию, Страница: 44 / 53

D
–EIMAC01905-23_00EN - 44/53
•
Costal environment
•
Highly polluted urban environment
•
Rural environment close to of animal excrement and fertilizers, and high concentration of exhaust gas from
diesel generators
•
Desert areas with risk of sandstorms
•
Combinations of the above
Unit exposed to a highly aggressive environment can face corrosion in a shorter time than ones installed on a standard
environment. Corrosion causes a rapid rusting of the frame core, consequently, decreases unit structure life time. To avoid
that, it is necessary to wash periodically the frame surfaces with water and suitable detergents.
In case of part of unit frame paint came off, it is important to stop its progressive deterioration by repainting the exposed
parts using proper products. Please contact factory to get the required products specifications.
In case of just salt deposits are present, it is enough to rinse the parts with fresh water.
Table 19 lists all Maintenance activities for standard applications and standard environment.
Table 20 lists all Maintenance activities for critical applications or highly aggressive environment
.
Following below instructions is mandatory for cases listed above, but also advised for units installed in standard
environments.
Table 18
– Standard Routine Maintenance Plan
List of activities
Weekly Monthly
(Note 1)
Yearly/Seasonal
(Note 2)
General:
Reading operating data (Note 3) X
Visual inspection of unit for any damage and/or loosening X
Verification of thermal insulation integrity X
Clean and paint where necessary X
Water analysis (Note 6) X
Check of flow switch operation X
Electrical:
Verification of control sequence X
Verify contactor wear
–
Replace if necessary
X
Verify that all electrical terminals are tight
–
Tighten if necessary X
Clean inside the electrical control board X
Visual inspection of components for any signs of overheating X
Verify operation of compressor and oil heater X
Measure compressor motor insulation using the Megger X
Clean air intake filters of the electrical panel X
Verify operation of all ventilation fans in the electrical panel X
Verify operation of inverter cooling valve and heater X
Verify status of capacitors in the inverter (signs of damage, leaks, etc) X
Refrigeration circuit:
Check for any refrigerant leakage X
Verify refrigerant flow using the liquid sight glass
–
Sight glass full X
Verify filter dryer pressure drop X
Verify oil filter pressure drop (Note 5) X
Analyse compressor vibrations X
Analyse compressor oil acidity (7) X
Check security valves (Note 8) X
Condenser section/ Hydronic Freecooling section:
Clean water rinse condenser coils / hydronic freecooling coils (Note 4 and 9) X
Verify that fans are well tightened X
Verify condenser coil fins condenser coil fins / hydronic freecooling coils fins
- Remove / Comb if necessary X
Evaporator/Heat Recovey:
Check the cleaning of the Evaporator/BPHE (Note 9) X
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 coils more often.
5. Replace the oil filter when the pressure drop across it reaches 2.0 bar.
6. Check for any dissolved metals.
7. TAN (Total Acid Number) :

0,10 : No action
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.