The recently released IMO Jaguar VXH energy saving inverter drive includes special functions incorporated specifically to support HVAC applications.  The Jaguar VXH torque vector controlled drive was designed in consultation with industry experts worldwide and satisfies the specific requirements of HVAC applications.

Linearization function

This function estimates the target pressure using the flow rate, which allows the estimated terminal pressure to be controlled.

For an air-conditioning heat source system, the quantity of the cooling or heating water required fluctuates due to outside temperature or day/night requirements. Therefore, maintaining a constant water pressure may lead to unnecessarily high pressures on terminals at a low operating state and wasted energy at the pump.

By controlling the pump using a correlation of required pressure and the estimated terminal pressure using the detected load flow rate through the PID controller it is possible to reduce the wasted pump power to achieve a greater energy-saving effect.

Filter clogging prevention function

This function detects clogging of the fan filter by monitoring output current and pressure sensor value. When clogging is detected, the fan is rotated in reverse to eject dust before continuing it’s normal operation. An alarm output can signal maintenance is necessary.

Wet-bulb temperature estimation control

This function is used for controlling cooling tower and fans. The wet-bulb temperature could be higher than the set temperature if the external air temperature is too high. In this case the water temperature would not be able to reach the set temperature so the fan keeps rotating at high speed and fails to deliver energy-savings.

Jaguar-VXH automatically estimates the wet-bulb temperature and controls the fan so that the cooling water is interlocked with the air temperature so as not to use unnecessary energy.

Fire mode (forced operation)

In this mode the inverter will continue operating the fan or pump for as long as possible in case of an emergency. All of the inverter protection functions are ignored and operation continues until failure.

Pick-up operation function

The pick-up function enables the inverter to match the output frequency to a rotating motor regardless of the direction of rotation and pick up the motion smoothly. This function is particularly useful when switching the motor directly from mains operation to inverter operation.

Other HVAC specific functions include

– Air Handling Unit (AHU) Supply fan / Return fan

– Chilled water pump

– Cooling water pump

– Cooling tower fan

IMO Jaguar VXH for HVAC applications (0.75kW – 710kW)

The Jaguar VXH energy saving drive is designed to meet the demands of the building services industry. To simplify installation it is available in IP21 or IP55 forms for use with air handling units, cooling fans and circulating pumps.

All models incorporate multi-language keypads, built-in RFI filtering as standard, and drives up to 90kW also include built-in DC line reactors.  Other features include a real-time clock, built-in PLC functionality, PID controllers, automatic energy saving, and a cumulative kWh data logger.

Suitable for BMS integration or stand-alone applications, the drive supports a wide range of analogue and digital input options and with BACnet MS/TP, Modbus RTU and Metasys N2 communications built in as standard and Lonworks, Ethernet, Profibus, DeviceNet, CANopen and CC-Link as plug in option cards.

Applications within the building services industry require 24/7 operation and all IMO Jaguar Drives have a 10 year design life and are covered by IMO’s unique 5 year warranty.  With many energy saving applications offering payback periods of between 12 – 18 months IMO’s 5 year warranty means that they are the only drives company to underwrite energy savings.

Go here for IMO XVH brochure
Go here for IMO Jaguar drives at discounted prices at 999 Inverters