DriSteem HUMIDI-TECH DI Installation Guide download pdf (Page 78)

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Installation and Operation Manual

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Automatic drain sequence for potable water (not softened)

When configured to run a potable water humidifier with an

automatic drain valve, Vapor-logic

uses an automatic drain

sequence (ADS) to help reduce mineral accumulation in the tank

and drain line to decrease tank maintenance.

The ADS sequence starts by opening the drain valve to empty the

tank. The default drain time (ADS duration) is product specific for

potable water (see Table 74-1). Once the drain time expires, the

fill and drain valves remain open to flush the tank. The default flush

time (AFS duration) is one minute. Once the flush timer expires,

the ADS is complete and the humidifier resumes normal operation.

Automatic draining and flushing can be adjusted using the Set Up

screen on the keypad/display. The user can set the drain and flush

duration, and can also set when the draining and flushing occurs.

There are three options (modes) for defining when draining and

flushing occurs:

1. After a user-defined amount of water has been converted to

steam (“Use” mode)

2. At a defined time (“Interval” mode)

3. After a user-defined amount of water has been converted to

steam and at a defined time “Use + Interval” mode)

These three modes are defined in more detail below. Please note

that these options are available only with a standard water system

with an automatic drain valve. If the humidifier is configured for

DI/RO water or if the unit has a manual drain valve, these drain and

flush options are not available.

ADS modes

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Draining and flushing based on usage is the default ADS mode.

When the ADS mode is set to “Use,” the humidifier enters a

drain and flush sequence after a user-defined amount of water

has converted to steam. For example, if the “Lbs of H2O until

ADS” setup parameter is set to 10,000 lbs (4536 kg) in the Set

Up menu, the humidifier enters a drain and flush sequence the

moment 10,000 lbs (4536 kg) of water convert to steam. This

allows the unit to drain and flush the moment it is needed.

Table 74-1:

System-dependent defaults for

automatic drain sequence (ADS)

Humidiﬁer

ADS duration

(drain time

in minutes)

AFS duration

(ﬂush time

in minutes)

Vapormist 8 1

Humidi-tech 8 1

CRUV 8 1

Vaporstream 12 1

STS 14 1

LTS 14 1

GTS 18 1

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