DriSteem Vapor-logic 4 User Manual

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Table 79-1:
Multitank priority groups application example
Priority
group Assignment Description Application considerations
0Trim
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changes.
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t (FOFSBMMZUIJTUBOLTIPVMECFBO443DPOUSPMMFEFMFDUSJDSFTJTUJWFVOJU
An SSR-controlled electric
resistive unit will provide the best
control.
1 Load
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GTS and STS are the most cost
effective, but any unit can be
used.
2Peak
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t #FDBVTFJUEPFTOPUSVOGSFRVFOUMZNBLJOHGVFMDPTUMFTTPGBOJTTVFUIJTJTBHPPE
assignment for a lower-up-front-cost humidifier.
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Electric resistive are the most cost
effective (any unit can be used).
3 Redundant
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t 5IJTUBOLXJMMPOMZSVOXIFOBUSJNMPBEPSQFBLVOJUJTTIVUEPXOGPSTFSWJDFPSBMBSN
conditions and the remaining trim, load, and peak tanks cannot meet demand.
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See Note 1 below.
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will not need to bring down the master controller to service it.
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most cost-effective up front.
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factor.
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Notes:
1. If protection is required against multiple tanks being offline at the same time, the redundant tank should be at least as large as the sum of the X largest tanks
where X is the number of tanks for which protection is desired.
2. From a fuel cost standpoint, electric should have the lowest priority. It should run last and the least.
3. From an energy standpoint, GTS generally has the lowest operating cost.
4. When calculating energy, consider heat loss from distribution and piping of steam.
5. Humidifiers within a priority group are load leveled.
6. Humidifiers within a group should have the same energy source.
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Operation

DriSteem Vapor-logic 4 Specifications

General

Brand	DriSteem
Model	Vapor-logic 4
Category	Controller
Language	English