condensation problem

[yumulbong19]

hi guys!
i have condensation problem on linear diffuser supply by chilled water fcu. thermostat temp setting is 20c, motorized valve is functioning, off coil temp is 12c, airflow for 5 diffuser ave. is 2.5m/s, all flexible ducting is sealed, wet bulb temp is 23 dry bulb is 21, just finished chemical cleaning on coil. what else can be the cause of condensation?

[NoNickName]

dry bulb is generally warmer then wet bulb. Please amend accordingly.

Let alone that, as long as off coil conditions is below dew point, condensation happens. Nothing wrong with that.

[Tesla]

Your off coil temp is too lo, velocity is lo and set point too lo. Increase these to illiminate condensation. Check fan speed,PI control loop and static pressure/filter. Also check location of sensor and calibration. What is the condition of fresh air intake - amount, RH and temp?

[Tesla]

Is there enough LSD's for the load? The RH in Singapore is usually high. I must assume a commercial building, there are usually problems with LSD's and proximity to workstations. Is it perimeter or central zone?