DriSteem Vapor-Logic Guía de instalación descargar pdf (Pagina 27)

VAPOR-LOGIC also has the capability of being the

primary humidity controller when a humidity duct or

room transmitter is furnished. The digital key pad

display module allows you to monitor actual set point

and to change desired set point when necessary.

The time proportioning function operates when actual

% RH is within the throttling range. When the actual %

RH falls below set point and out of throttling range

100% output demand is necessary. If the actual % RH

increases above and out of throttling range, humidifier

turns off completely. See figure 27-1.

DRI-STEEM Offers Five Forms of Time

Proportioning:

• TP Modulation for single electrical output humidifiers

• TP/Sequencer Modulation for multiple electrical

output humidifiers

• SCR/Sequencer Modulation using solid state power

controller with sequence of multiple electrical

humidifier outputs

• 100% SCR Modulation is total modulation of all the

electrical outputs together through a SCR power

control system without sequencing

• Varying 6-9 VDC or 1-10 VDC analog signals to

modulate steam or hot water valves

VAPOR-LOGIC

CONTROL SCHEMES

Figure 27-1: VAPOR-LOGIC Time Proportioned Controller

Throttling Range 5% RH

(symmetrical around Set-

point)

100% Demand

Desired

Set-point

52.5

47.5

Actual % RH

0% Demand

Time

Humidity % RH

Throttling Range

Set Point: 50% RH

Throttling Range: 50%

OM-590

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 51 52

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DriSteem Vapor-Logic Guía de instalación Pagina 27

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