PRODUCTS > FILTRATION
AIRFLOW OPTIMIZER BOOSTER FAN AND VARIABLE SPEED DRIVE
Dryer efficiency depends on sufficient airflow. When infrastructure challenges produce ducts that are restricted or excessively long, back pressure in the ducting increases and dryer efficiency decreases. Airflow Optimizer booster fan and variable speed drive packages are tailored for optimum drying efficiency. We can accommodate any combination of airflows in virtually any backpressure situation.
The ability of a commercial dryer to meet its designed efficiency is limited by its capacity to move air out of the exhaust ducting. Undersized ducting or excessive duct length can create pressure problems at the dryer and lead to decreased dry times by 50% or more in natural gas dryers. Energenics Airflow Optimizer systems are designed to restore the efficiency of the commercial dryer and are configured based on dryer specific ducting conditions. Variable speed controls and a pressure monitoring device are used to modulate system fan speed based on real time conditions of duct airflow. It is common to see dry time efficiency increase by 25% immediately after installation of an Airflow Optimizer System, removing the bottleneck in your laundry operations.
Maintains exhaust system air flow to optimize drying.
- Maintains Optimal Airflow
- Fully Automatic Operation After Start-up
- Controls Fan Operation
- Minimize Drying Time
- No User Input Required
- Conserves Energy
- Air Free Flat
- Air Free Round
- Air Free Duct (OPL)
- Inline Series
HOW IT WORKS
The primary component of the Airflow Optimizer (AFO) system is a pressure sensing transducer that in conjunction with a VFD and booster fan, allows dryers to perform at the manufacturers airflow specifications. By measuring back-pressure at the lint filter, the AFO ensures airflow in the exhaust system is always balanced, even when dryers are cycling on and off in different intervals. The AFO will quickly and automatically adjust the booster fan output to match airflow from the dryers. The system is programmed to monitor continuously for optimal exhaust air balance.
OPTIMIZING UNIQUE VENTING CHALLENGES
FREQUENTLY ASKED QUESTIONS
When the ducting is restricted by length of run or number of elbows to create a backpressure in excess of .5” W.C. A typical installation is a multi-story building or an installation with a long horizontal run. In most cases a length of duct in excess of 50 feet will require a booster fan.
Usually a belt driven tubeaxial round duct fan is used. A tubeaxial fan will handle dryer lint and also operate at high temperatures created in the drying process.
It is normally mounted in close proximity to the downstream side of the lint filter. The fan speed will also have a faster response time with a variable frequency drive equipped application.
It is essential that the booster fan and dryers are handling matching airflow volumes. An Airflow Optimizer with variable frequency drive will control the booster fan speed to keep the airflow within proper operating parameters. At the very least, a barometric damper should be installed between the filter and the fan if an Airflow Optimizer is not installed.
If the filter has a lint bag, it will be drawn into the filter. The result will cause the redeposited lint to be pulverized into a powder consistency allowing it to go through the screen.
It is necessary to use a ridged lint container. Never use a lint bag to store lint when using a booster fan.
If the backpressure is below the set point, the fan assist is not required and the fan will stay turned off until the set point is reached.
HITACHI WJ-200 VARIABLE FREQUENCY DRIVE (VFD)
Hitachi inverters can run values in the slight negative, further reducing backpressure and also removing condensate from the dryer cylinders while not in operation. In northern climates this is especially useful when outside temperatures are low and nighttime inactivity can result in the cold air returning down the duct into the dryer baskets. This cooling of air produces water and the potential for a delayed startup the following morning.
Adjust parameter F001 to 55.00; this will change the set point to a slight positive. To access parameter F001 press the ESC key until F001 appears, then press set.
YASKAWA P-7 VARIABLE FREQUENCY DRIVE (VFD)
The upper value should read parameter U1-02, this is the real-time output frequency of the inverter measured 0-60 in Hertz. This should, with multiple dryers running, be fluctuating constantly.
The middle value should read U1-38, this is the set-point in inches water column at which the drive will initialize. Under normal conditions it should ALWAYS be .12”w.c.
The bottom value should read U1-24, this is the real-time backpressure in inches water column the dryers are experiencing. Once the value exceeds .12” w.c., the drive will initialize automatically and fluctuate the output in hertz (speeding and slowing the fan) in an effort to maintain a desired backpressure of .12”w.c. If this value is higher than the value shown in U1-38, and the fan is not running, call Energenics for support at 800-944-1711.
The pressure transducer is the small box connected by 3 wires to the drive. The tubing should be run from the intake of the lint collector (high pressure side pre-screen on the filter) into the high port on the transducer without kinks or restrictions. Plumbing it to the low port will produce an inactive drive.
Make sure the pressure tubing has no kinks, cracks, or lint built up inside it, disconnect both ends of the hose and use compressed air to clean the tubing out. Verify the wiring from the transducer matches the drawing shown on the inside of the panel. Also verify there is a jumper wire installed between terminals S1 and SN on model P-7. For model V-1000 the jumper should be between SC and S1. Using a multi-meter, ensure the proper voltage is supplied to the inverter.
Energenics is widely regarded as a leading player in lint management, having developed over 10,000 commercial dryer lint filters and thousands of indoor air filtration devices. Our product portfolio includes UV light and chemical technologies that are utilized for disinfecting surfaces involved in processing healthcare textiles. Working closely with competent manufacturers and equipment distribution partners, we strive to deliver unparalleled levels of cleanliness while reducing laundry operating costs.
Call Energenics today to learn more about our Air-Flow Optimizers.