PRODUCTS » AIR ON DEMAND

Air On Demand

Our Variable Speed Drive "Air-On-Demand" systems has been developed in house specifically for marine engine room applications.

DC Fan "Air-On-Demand" Controller

This Pulse Width Modulation (PWM) DC motor controller can provide up to a maximum continuous current of 50A to your DC motor or other DC load, thanks to a digital microcontroller based (PIC) design and highly efficient High-Power 202A MOSFET for cooler operation.

The controller has one mode of operation. FIXED frequency. The fixed frequency runs the controller at 100Hz. Duty cycle is fully adjustable from 0% to 100%.  

The controller also offers built-in soft-start feature that greatly reduces the mechanical stress on the motor as well as the electro-dynamic stress on the attached cables and battery, therefore extending the life span of the whole system. When power is connected to the circuit, the duty cycle will start from 0% and go up to the present value in about 1 to 1.5 seconds.

These units have a fully adjustable idle speed 0-100%, but are preset at our factory to 50%. The idle speed is easily adjusted onsite via the single potentiometer knob on the control box. The fans will run at preset idle speed to 30 degrees Celsius. When the engine room reaches 30 degrees the fan speed automatically increases incrementally until 40 degrees Celsius. At or above 40 degrees Celsius the fans will run at 100% and remain at 100 % until the engine room temperature is reduced below 40 degrees.

We recommend 1 controller per 2 x 12volt DC fans or per 3 x 24volt DC fans.


AC Fan "Air-On-Demand" Controller

Fully automatic controller designed to regulate speed of you engine room fans. It can be controlled at the bridge through a switching (on/off) temperature probe in the controller that measures the engine room temperature and directly varies the speed in relation to that temperature. Low temperature = low speed fan, high temperature = high speed fan.

You will need an Electrician to install the AC systems. This system offers a fully automated control with a simple selector switch- AUTO/OFF/ FIXED.  

The fixed speed is pre-set at 50%, but is adjustable if required. The fixed speed at 50% is utilised for maintenance periods in order to limit engine room noise. When the system is on AUTO and active, the controllers will directly vary the fan speed in direct relation to the Engine Room Temperature. This allows maximum performance at minimum power and sound levels, creating the ideal low noise work environment and allowing the best possible performance and protection of both crew and equipment. NB: the fixed speed maybe adjusted to a custom level if required.

We stock these common sizes:

  • 2.2Kw VSD (variable speed drive) 240v
  • 2.2Kw VSD (variable speed drive) 3Phase
These are fully programmed and bench tested with installation schematics.

Pricing:

Our   DC   Air-On-Demand fan controllers are priced from   $1400.00    + gst.
Our   AC   Air-On-Demand fan controllers are priced from   $2880.00    + gst.

NB: Please understand these prices are LIST prices. If you are a trade supplier, boat builder or require quantities, please contact us for more competitive trade prices.