Carrier Yileng - Shanghai, China
Compressor earth terminal in the control box
Terminal in the compressor wiring box
Tunnel terminal screw, circuit breaker 3RV6011
Tunnel terminal screw, hydronic pump contactor
10.5 - Tightening torques for the main bolts and screws
10.6 – Air side exchanger
We recommend that finned coils are inspected regularly to check the degree of fouling. This depends on the
environment where the unit is installed, and will be worse in urban and industrial installations and near trees that
shed their leaves.
For coil cleaning, two maintenance levels are used, based on the following two levels：
Level 1
Recommendations for maintenance and cleaning of round tube plate fin (RTPF) condenser coils:
• Regular cleaning of the coil surface is essential for correct unit operation. Eliminating contamination and
removal of harmful residue will increase the operating life of the coils and the unit.
• The maintenance and cleaning procedures below are part of the regular maintenance and will prolong the
life of the coils.
Removal of fibres that obstruct the surfaces:
Fibres and dirt collected on the coil surface must be removed with a vacuum cleaner. If you do not have a vacuum
cleaner, a soft brush with non-metallic bristles can be used instead. In all cases cleaning must be done in the
direction of the fins, as the coil surface is easily damaged. The fins bend easily and damage the protective coating of
the coil, if cleaning is done at right angles to the fins.
NOTE: Using a water jet from a spray hose on a polluted surface will result in fibres and dirt becoming
trapped in the coil, making cleaning more difficult. All fibres and dirt must be removed from the surface,
before using a low-speed rinsing jet.
Periodical cleaning with clean water:
For coils installed in a coastal or industrial environment periodical cleaning by rinsing with water is
beneficial. It is however essential that rinsing is done with a low-speed water jet to avoid damaging the fins.
Monthly cleaning as described below is recommended.
ATTENTION
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