DriSteem HUMIDI-TECH DI Installation Guide download pdf (Page 47)

DRI-STEEM Vapor-logic

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Priority groups

All humidifier tanks in a multi-tank group are assigned to a priority

group. There are four priority groups: 0, 1, 2, and 3.

The purpose of priority groups is to identify tanks as trim tanks or

redundant tanks, and/or to define fuel or other preferences. The

default configuration assigns all tanks to priority group 1 where all

tanks operate with equal priority.

Trim tanks

A tank functioning as a trim tank is assigned to priority group 0

and always operates before tanks in priority groups 1, 2, or 3.

The function of a trim tank is to be the first tank in a multi-tank

group to respond to system demand changes. Multi-tank groups

requiring a rapid response to changes in system demand typically

have an electric element humidifier with SSR control as the trim

tank .

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The system capacity of a multi-tank group is the combined capacity

of tanks in groups 0, 1, and 2. A tank functioning as a redundant

tank is assigned to priority group 3 and operates only if one or more

of the tanks in groups 0, 1, or 2 is not available and the multi-tank

group cannot meet the demand for steam production. Placing a

tank in priority group 3 ensures that it only runs as a redundant

tank.

Because a redundant tank operates infrequently, assigning master

controller status to the redundant tank in a multi-tank group

reduces system down time while the master controller tank receives

servicing.

Multiple tank configurations:

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Important:

Information on this page applies to

Vapor-logic

firmware versions 5.x.x

and 7.x.x only (systems with multi-tank

capability).

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DriSteem HUMIDI-TECH DI Installation Guide Page 47