Table of Contents
Advertisement
•
Chemical cleaning agents, water containing bleach, acidic or basic cleaning agents must never be used
to clean the coil exterior or interior. These cleaning agents may be difficult to rinse off and can accelerate
corrosion at the joint between tube and fins, where two different materials come into contact. If dirt on the
coil surface persists, use a Totaline coil cleaner as described above.
•
High-speed water from a high-pressure cleaner, spray hose or compressed air cleaner must never be
used for coil cleaning. The force of the water or air jet will bend the fins and increase the air-side pressure
drop. This can result in reduced performance or nuisance shutdowns of the unit.
Level 2
Clean the coil, using appropriate products. We recommend TOTALINE products for coil cleaning:
Part No. P902 DT 05EE: traditional cleaning method
Part No. P902 CL 05EE: cleaning and degreasing.
These products have a neutral pH value, do not contain phosphates, are not harmful to the human body, and can be
disposed of through the public drainage system.
Depending on the degree of fouling both products can be used diluted or undiluted.
For normal maintenance routines we recommend using 1 kg of the concentrated product, diluted to 10%, to treat a
2
coil surface of 2 m
. This process can either be carried out using a high-pressure spray gun in the low-pressure
position. With pressurized cleaning methods care should be taken not to damage the coil fins. The spraying of the
coil must be done:
• in the direction of the fins
• in the opposite direction of the air flow direction
• with a large diffuser (25-30°)
• at a minimum distance of 300 mm from the coil.
It is not necessary to rinse the coil, as the products used are pH neutral. To ensure that the coil is perfectly clean, we
recommend rinsing with a low water flow rate. The pH value of the water used should be between 7 and 8.
IMPORTANT:
•
Never use pressurized water without a large diffuser. Do not use high-pressure cleaners for coils!
•
Never use a fluid with a temperature above 45
•
Correct and frequent cleaning (approximately every three months) will prevent 2/3 of the corrosion
problems.
•
Protect the control box during cleaning operations.
10.7 - Evaporator maintenance
Check that:
• the insulating foam is intact and securely in place.
• the cooler heaters are operating, secure and correctly positioned.
• the water-side connections are clean and show no sign of leakage.
10.8 - Compressor maintenance
10.8.1 - Oil separator
Check the correct operation of the heaters and check that they are well attached to the oil separator ring.
10.8.2 - Integral oil filter change
As system cleanliness is critical to reliable system operation, there is a filter in the oil line at the oil separator outlet.
The oil filter is specified to provide a high level of filtration (5 μm) required for long bearing life. The filter should be
checked after the first 500 hours of operation, and every subsequent 2000 hours. The filter should be replaced at
any time when the pressure differential across the filter exceeds 2 bar.
year.
The pressure drop across the filter can be determined by measuring the pressure at the filter service port and the oil
44
°
C to clean the air heat exchangers.
Carrier Yileng - Shanghai, China
The filter should be replaced at least once per
Hide quick links:
Advertisement
Table of Contents
