• DRI-STEEM Corporation

Microprocessor Controller

Vapor-logic, DRI-STEEM's humidification system controller, has been setting the standard for exceptional functionality and accurate RH control since 1992. The fourth generation controller, Vapor-logic4, retains the qualities that established the Vapor-logic reputation and offers several new capabilities, including:

Web interface, a standard feature, enables remote, simultaneous, secure access from anywhere, at any time.

Modbus, BACnet, and LonTalk allow interoperability with multiple building automation systems (BAS).

Up-time optimizer keeps humidifiers operating through system faults, as long as safety conditions are met, minimizing production down-time.

USB port on Vapor-logic4 allows easy software updates, and data backup and restore capability.

PID control provides accurate, responsive, and adjustable relative humidity control.

Real-time clock allows time-stamped alarm and message tracking, and accurate drain and flush scheduling.

Tank temperature sensor, mounted on the evaporating chamber, allows over-temperature protection, freeze protection, and tank preheating, allowing rapid response to a call for humidity.

Auxiliary temperature sensor/transmitter allows temperature compensation control to prevent window condensation, or air temperature monitoring, such as in a duct.

Programmable outputs allow remote signaling or device activation, and are easily configured during the setup process.

Multiple-humidifier control allows staged control of up to 16 humidifiers with one controller.

Enhanced diagnostics include:

• Test outputs function, using the keypad or Web interface to verify component operation
• Test humidifier function, by simulating demand to validate performance
• Data collection of RH, air temperature, water use, energy use, alarms, and service messages for viewing from the keypad or Web interface  

Factory commissioning of humidifier and control board guarantees a reliable, fast installation, minimizing field installation requirements. All units are operated and tested — heating water in each tank — before shipping.

Preconfigured but easily changed — Just go into the Setup menu to change a factory setting if, for example, a transmitter changes.