York YECFC, Инструкция по установке, эксплуатации и обслуживанию, Страница: 14 / 16

Product Conveyance Installation
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5. Failure Analysis
5.1 Low Air Flow Rate
The actual static pressure needed is greater than the design static pressure and. Thus, the air flow rate is lower than
the design value.
Increase fan speed as required.
5.2 High Air Flow Rate
The actual static pressure needed is lower than the design static pressure, making the air flow rate higher than the
design value. The increased air flow rate increases coil velocity and increased unit noise level.
Increased air flow rate leads to risk of moisture carryover where coil face velocity exceeds 2.5 m/s.
Decrease fan speed as required.
5.3 High Noise and Vibration level
Check for correct unit isolation.
Verify that there are no vibration paths via duct or pipe to the structure.
Verify there are correctly installed flexible connections between unit, the return air, and the supply air ductwork.
Verify flexible connections are correctly installed to connecting water pipes.
Ensure the unit is correctly hung, and any installed vibration isolators are installed and functioning correctly.