DriSteem HUMIDI-TECH DI Guide d'installation télécharger pdf (Page 12)

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Installation and Operation Manual

Probe system

Standard or softened water systems use conductivity probes to

measure and control water levels for optimum operating efficiency.

Water conductivity must be at least 100 μS/cm for the probe

system to operate. The three-probe system is monitored by the

Vapor-logic

board, which performs all the necessary logic and

timing functions to provide total water level control and safety

shutdown.

Vapor-logic

automatically maintains the water level between

the upper two probes A and B (see Figures 8-1 and 8-2).

When the water level falls below probe B, the fill valve opens until

the water level reaches the upper probe A. Water must remain in

contact with the probe surface for three seconds for Vapor-logic

determine that the water is at the probe’s level.

Conversely, water must stay out of contact with the probe surface

for three seconds for Vapor-logic

to determine that the water

is below the probe’s level. This three-second delay ensures that

turbulence does not cause an incorrect level reading.

Each time the fill valve energizes, the Vapor-logic

system tests

the probe system. If the signal from the probe assembly begins to

deteriorate, the message “Clean Probes and Tank” appears on the

keypad/display. Once the probe system reaches its maximum usable

life, the humidifier shuts down and the “Probe Assembly fault”

message appears.

An adjustable skim time allows for an extended skim period

(0 to 120 seconds) to reduce surface mineral accumulation. When

skimming, the fill valve remains energized after the water level

reaches the upper probe A for the amount of time specified by the

Skim Duration. The Skim Duration is adjustable in one-second

intervals through the Set Up screen.

Probe C provides low water protection for the heating outputs. If

the water level falls below probe C, the heating outputs are disabled.

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Systems using tap or softened water control

water levels electronically using a three-

rod probe. The controller responds with the

above actions when the water level reaches

each rod.

Fill valve closes

Fill valve opens

Low-water cutoff

Figure 8-1:

Water level control for standard

water systems

VLC-OM-030

Systems using tap or softened water

control water levels electronically using a

three-rod probe. The controller responds

with the above actions when the water

level reaches each rod.

Figure 8-2:

Water level control for standard water

systems (on some older models)

VLC-OM-030

Fill valve closes

Fill valve opens

Low-water cutoff

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DriSteem HUMIDI-TECH DI Guide d'installation Page 12

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