Price FFU series, Инструкция по установке и обслуживанию

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FAN FILTER UNIT
BALANCING
If the FFU is ducted and removing the duct is not possible, follow the below instructions for balancing:
Step 1: Turn off primary air source.
Step 2:
Install an air pressure measurement device (i.e. Pitot tube) in the duct prior to the FFU inlet.
Step 3: Power up FFU and set speed controller to desired airflow. See Airflow Setpoint section to determine initial setpoint.
Step 4: Power up the airflow control device. (Ductwork should have been previously balanced)
Step 5: Read the inlet pressure.
Step 6:
Measure airflow using flow hood.
Step 7: Using the table below, adjust FFU controller, or upstream airflow device as required
Repeat steps 4-6 until desired airflow and inlet pressure (0.0 ± 0.05” w.g.) is achieved..
FFU Airflow FFU Inlet Static (measured) Action
Above Set point Above desired pressure Decrease airflow on airflow control device
Above Set point Below desired pressure Decrease FFU control setting
Above Set point At desired pressure Decrease Both FFU and airflow control device
Below Set point At desired pressure Increase Both FFU and airflow control device
Below Set point Below desired pressure Increase airflow on airflow control device
Below Set point Above desired pressure Increase FFU control setting
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