DriSteem HUMIDI-TECH DI Installation Guide download pdf (Page 77)

DRI-STEEM Vapor-logic

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SDU operation

If your humidifier is equipped with a Space Distribution Unit

(SDU) or an Area-type fan, it is enabled after the Vapor-logic

receives a call for humidity and the tank temperature rises above

150 °F (66 °C).

When the humidifier no longer receives a call for humidity, it stops

heating and the SDU or Area-type fan continues to run for the SDU

Duration to ensure that steam gets dispersed. The SDU Duration

is adjustable in one-minute intervals (default is 5 minutes) through

the Set Up screen.

Sensor offsets

All external transmitters shipped with Vapor-logic

can be field

calibrated using the keypad/display through the Set Up screen. For

example, if the system is equipped with an RH transmitter, there is

an RH offset setting.

The factory default for all transmitter offset settings is zero. If an

adjustment is necessary, use the keypad to adjust the transmitter

reading up or down through this setting. The sensors that have this

adjustment capability are the humidity, VAV high limit, temp comp,

and dew point transmitters.

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DriSteem HUMIDI-TECH DI Installation Guide Page 77