WOODDRYER SYSTEM specification sheet
Wet and Dry bulb control system.
- The wet and dry bulb control system is the standard in the lumber industry for operating kilns. Normally these systems use standard R.T.D. (resistance
temperature detection) probes for sensing kiln chamber temperatures. The relative humidity is determined and controlled by measuring the wet bulb and the
dry bulb temperature. By using a conversion table chart, you can determine the relative humidity and/or the equilibrium moisture content. The majority of
controls operate temperature related valves and actuators only, such as:
- - Valve for heating kiln (steam, hot water, gas, etc.) (Based on dry bulb)
- - Actuator for opening vents or starting dehumidifier (Based on Wet bulb)
- - Valve for opening conditioning spray (steam or water) (Based on Wet bulb)
- Wet/dry bulb controllers come in many varieties:
- - Controllers with programming for entering a multi- stage time based programs.
- - Controllers placed in a computer network help control auxiliary components,
such as frequency drive for main fans, modulated operation of vents,
modulated operation of heat valve, integrated moisture meters, etc.
Most kiln controllers manufactured today are either based on "off the shelf" controllers adapted to use in kilns or strictly design for kilns. Either solution can
provide you with a reliable kiln controller which will work for many years to come. However, they are seldom prepared for future expansion or
changes/improvements in drying methods. As the industry started building more electronics into kiln controllers to optimize kiln output, the cost of kiln
controllers rose steadily. When purchasing a kiln controller, you should expect a controller that meets both today's standard, as well as accommodate future
advances in kiln programming.
The mission of Wooddryer Kiln Controllers is to deliver a highly reliable system that meets all of today's specifications, provide flexibility to accommodate
coming advances, and offer it to the lumber industry at honest pricing. We believe this attitude is one which motivates Wooddryer System to manufacture a
superior product line inspired towards serving the industry more efficiently.
Wooddryer Wet/Dry Bulb controller (WSUS-WDHW-2420)
This kiln controller is based on an industrial PLC. This provide both the
customer and ourselves with greater flexibility in programming features and
hardware configuration. These controllers are prepared for full compliance
with Wooddryer Link System network. Our network can help you operate your kiln(s)
more efficiently, as well as maintain a thorough operation file.
The flexibility designed into our kiln controllers extends to both to the
current features available, as well as future developments in drying methods
and new technology. In short, the all Wooddryer System controls are easily
upgraded. It is even practical to make specialized changes for a certain customer
without compromising full compliance with Wooddryer Link network.
Specifications:
- Processing unit:
- Industrial PLC
- Power:
- 115-240VAC/50-60 Hz
- Display:
- Info. display for viewing kiln conditions and changing set points and other parameters.
- Program adjust.:
- The program has 32 variable parameters.
- Pilot lights:
- Venting, heating, spray, fan forward/reverse, error.
- Push buttons:
- Control current, fans, venting, spray, computer control.
- Sensors:
- 8 x 4-20mA inputs for temperature, RH% or Wet bulb, etc inputs.
- or 4 RTD temperature probe inputs.
- Moisture meter:
- Opt., integrated MC meter with 6 measuring points.
- Only with 4-20mA analog inputs.
- Fan shut down:
- Yes, input for energy savings.
- Error inputs:
- Yes, 3 inputs, normally motors.
- Energy meter:
- Kw and Btu meters can be installed and monitored for energy calculations.
- Output for:
- Main fans forward + reverse (can be started in sequence)
- Heat valve (sequence modulated)
- Venting (sequence modulated)
- Spray (on/off)
- Fatal error (2 for secondary alarm system)
- Network capable:
- Yes, RS-422 linked to Wooddryer Link System. All set points and parameters
can be controlled either on the controller itself or through the network computer.
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- Control cabinet is made with
- industrial components and comes
- complete with fuse section in a
- well organized layout prepared
- for convenient installation of
- new or existing kilns.
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