Daikin EWAQ-E Series - Condenser Coil Maintenance and Cleaning Recommendations

D-EIMAC00801-17EN-AR - 17/44
Table 3 –Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment
List of Activities (Note 8)
Weekly
Monthly
(Note 1)
Yearly/Seas
Onal (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
Clean
X
Paint where necessary
X
Clean and paint where necessary
X
Analysis of water (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
Condenser section:
Clean water rinse condenser coils (Note 4)
X
Quarterly clean condenser coils (E-coated only)
X
Verify that fans are well tightened
X
Verify condenser coil fins – Comb if necessary
X
Condenser Coil Maintenance and
Cleaning Recommendations
Routine cleaning of coil surfaces is essential to maintain
proper operation of the unit, avoid corrosion and rusting.
Elimination of contamination and removal of harmful residues
will greatly increase the life of the coil and extend the life of the
unit.
The following maintenance and cleaning procedure are
recommended as part of the routine maintenance activities.
REMOVE SURFACE LOADED FIBERS AND DIRT — Surface
loaded fibers and dirt should be removed with a vacuum
cleaner. If a vacuum cleaner is not available, a soft non-
metallic bristle brush may be used. In either case, the tool
should be applied in the direction of the fins. Coil surfaces can
be easily damaged (fin edges bent over and damage to the
coating of a protected coil) if the tool is applied across the fins.
NOTE: Use of a water stream, such as a garden hose, against
a surface loaded coil will drive the fibers and dirt into the coil.
This will make cleaning efforts more difficult. Surface loaded
fibers must be completely removed prior to using low velocity
clean water rinse.
Unit Maintenance and Cleaning
Unit exposed to the highly aggressive environments can face
corrosion in a shorter time than ones installed on standard
environment. The corrosion causes a rapid rusting of the frame
core, consequently decrease the unit structure life time and
decreasing the esthetic of the unit. 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 repaint of the exposed
parts using proper products. Please contact factory to get the
required products specifications.
Note: in case of just salt deposits are present, it is enough to
rinse the parts with fresh water.