Daikin EWYT021CZI-A1, Руководство по установке и обслуживанию

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List of Activities (Note 8) Weekly
Monthly
(Note 1)
Yearly/
Seasonal
(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
Clean inside the electrical control board X
Visual inspection of components for any signs of overheating X
Verify operation of compressor and electrical resistance X
Measure compressor motor insulation X
Refrigeration circuit:
Check for any refrigerant leakage (leak test) X
Analyze compressor vibrations X
Hydraulic circuit (Indoor Unit):
Check for any water leakage X
Check hydraulic connections X
Check the pressure at the pump inlet X
Clean the water filter X
Check the glycol concentration X
Check the water flow rate X
Check the safety valve X
Coil section (Outdoor Unit):
Checking the cleaning of the air heat exchanger (Note 6) X
Check the cleaning of water heat exchangers (Note 6) X
Verify that fans are well tightened X
Verify coil fins X
BPHE (Indoor Unit):
Check the cleaning of the BPHE X
Table 21
– Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment
Notes :
7. Monthly activities include all the weekly ones.
8. The annual (or early season) activities include all weekly and monthly activities.
9. Daily reading of the operating values of the unit allows maintaining high observational standards.
10. Check for any dissolved metals.
11. Clean condenser banks with clean water and water heat exchangers with appropriate chemicals. Particles and fibers could clog up
the exchangers, especially for water exchangers pay attention if water rich in calcium carbonate is used. An increase in pres sure
drops or a decrease in thermal efficiency means that the heat exchangers are clogged. In environments with a high concentrati on of
airborne particles, it might be necessary to clean the condenser bank more often.
12. Units placed or stored in a Highly Aggressive Environment for long time without operation are still subject to those routine maintenance
steps.
8.2.1. Air Heat Exchanger Maintenance
Routine cleaning of air heat exchanger 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.
Remove surface dirt, leaves, fibres, etc. with a vacuum cleaner (preferably with a brush or other soft attachment rather
than a metal tube), compressed air blown from the inside out, and/or a soft bristle (not wire!) brush. Do not impact or scrape
the coil with the vacuum tube, air nozzle, etc.
Use of a water stream, such as a garden hose, against a surface loaded coil will drive the fibres and dirt into the coil. This
will make cleaning efforts more difficult. Surface loaded fibres must be completely removed prior to using low velocity clean
water rinse.
A monthly clean water rinse is recommended for coils that are applied in coastal or industrial
environments to help to remove chlorides, dirt, and debris. It is very important when rinsing that the
water temperature is below 55 °C.