Analogue Air-On-Demand

Automatic Fan Speed Controllers

Our Air-On-Demand system comes with two distinct options for the control system; the basic Analogue Control System (ACS) or the Red Lion Digital Control System (RLDCS). This page relates to our Analogue system. You can find more info on the Digital Red Lion system if that suits you better.

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

Our Air-On-Demand systems are fully bench tested and pre-programmed ready for installation. They come complete with a control switch panel which includes a fault light & also include a full wiring diagram to aid in installation. AC and DC versions are available.

These controllers are designed to be used either manually or via automation. You have the ability to control the fan speed to allow for more air flow when you need it and less when noise may be a challenge.

While both systems will allow you to switch between manual or automatic control mode and manually adjust the fan speed, the RLDCS includes additional features which allow you to optimise the systems operation. As such, it is recommended that the RLDCS is used. However, if you want a system that is cheaper and still allows for manual/auto control of your engine room fan, the Analogue Control System is the most suitable for you.

Feature	Analogue System	Red Lion system
Switch between man/auto/off	Yes	Yes
Change manual speed	Yes	Yes
Change direction of flow	Yes	Yes
Displays live data	No	Yes
Can be programmed into auto ship management system	No	Yes
Shows system status	No	Yes
Allows performance diagnostics to be viewed	No	Yes
Has real time data logging	No	Yes
Illuminates in low light situations	No	Yes
Available in DC	Yes	No

This Pulse Width Modulation (PWM) DC motor controller can provide up to a maximum continuous current of 76A to your DC motor or other DC load.

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 preset 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 40%. The idle speed is easily adjusted onsite via the single potentiometer knob inside the control box. The fans will run at pre-set 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 a maximum of 4 x 12/24v DC Compact Fans per 1 controller.

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

The manual setting can be adjusted form 0-100%. The manual setting 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.

We stock these common sizes:

2.2Kw VSD 240v (variable speed drive)
2.2Kw VSD 3Phase (variable speed drive)

Custom size of 0.75Kw - 30Kw are available on request.

These are fully programmed and bench tested with installation schematics.