DriSteem Vapor-logic3 Operations Instructions download pdf (Page 52)

Operation:

Fill timer, over-temp fault

Safety features.

Operation

Fill timer

The VAPOR-LOGIC

controller keeps track of

approximately how much water, in the form of steam,

has left the tank. If this total amount exceeds a preset

limit without the fill valve being energized, a low water

condition is assumed and the humidifier is shut down.

Each time the fill valve is energized, the total is reset

to zero. Note that this system is not used on a DI/RO

humidifier because the fill valve is not an electric-

solenoid type. On a DI/RO tank, a mechanical fill

valve maintains the proper water level. This fill valve

operates independently of the VAPOR-LOGIC

controller. Therefore, on a DI/RO system, there is no

way to reset the steam total to zero as the tank fills.

Over-temp fault

The tank temperature is constantly monitored by the

VAPOR-LOGIC

controller. If the temperature ever

rises above a preset limit, the humidifier is shut down

and a thermal trip fault is given on the Alarms screen

of the keypad/display. This fault must be cleared or

acknowledged on the Alarms screen by the user

before humidifier operation will resume.

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DriSteem Vapor-logic3 Operations Instructions Page 52