Chilled Water Fan Coil Unit Troubleshooting

If the pumps have pressure gauges you can compare the working unit with the other.

Chilled water fan coil unit troubleshooting.

Chilled water coil piped incorrectly on the job site. Experience has shown me this fourth issue occurs probably once out of every 25 chilled water coil installations. Troubleshooting problems don t always originate in the design phase and manifest themselves as full blown calamities. If the fan coils have there own strainers they plug up too.

Often the chilled water is delivered at a higher temperature or lower volume. This unit came with shipping damage. One common problem with older fan coil units is unsightly black flakes blowing out of the air vents of the unit. Most fan coil units have either 3 or 4 row chilled water coils and have very little ability to overcome deficiencies based on undersized chilled water loops.

A chilled water system is a cooling system in which chilled water is circulated throughout the building or through cooling coils in an hvac system in order to provide space cooling. 2 3 globally leading daikin fan coil technology daikin china contents 04 unit characteristics 08. This can cause a reduction of 20 30 less btuh exchange. When we refer to the liner we mean the internal blanket which is fixed to the casing of the unit.

For example a partially plugged screen on the water strainer. Provides innovative commercial hvac and industrial hvac products. Ceiling concealed chilled water fan coil unit energy saving type catalogue engineering data ed fww ec eh 201609 fww200 fww800 fww300 fww1000 fww400 fww1200 fww500 fww1400 fww600. You will see the pvc drain pipe.

The powers that be wanted to repair and install the unit and replace the coil later. If there circuit setters on the fan coils that someone shut and forgot to open. Use a snake to force the blockage out. Turn on the pressure vacuum and the blockage should be forced out of the pipe.

If that does not work go back inside and remove the unit cover where the refrigerant and drain lines connect. This is usually caused when the interior liner of the unit breaks down through either damage or age. In this video we take a look into hvac fan coil units to understand how they work.