DriSteem Vapor-Logic Guía de instalación descargar pdf (Pagina 6)

Wiring On-Off Humidistats

DRI-STEEM may provide three types of on-off

controls: wall mounted, duct mounted or pneumatic/

electric relay. The wiring diagram (found on the inside

of the humidifier control cabinet) will show proper

wiring for these controls.

Wiring Modulating Humidistats

The standard modulating humidistat controllers

DRI-STEEM provides either duct or wall mounted

humidistats.

The humidistats are powered by 21 VDC supply

provided by the VAPOR-LOGIC

control board. A

6-9 VDC control signal is returned to provide the

modulating function.

Using a pneumatic modulating signal, DRI-STEEM may

provide a transducer to accept a 20-140 kPa pneumatic

input range.

A two-wire 0-135 ohm humidistat is also adaptable to

the VAPOR-LOGIC control board.

Wiring Modulating Humidity or Temperature

Transmitters

All transmitters provided by DRI-STEEM are two-wire

devices. (See your wiring diagram for proper

connections.) The humidity transmitters have a range

of 0-100% RH with an output of 4-20 mA. The

temperature transmitter has a range of -29° to 71° C

and produces a 4-20 mA signal.

Figure 6-1: Example of Proper Shielding Techniques When Connecting Humidity or Temperature Devices

to VAPOR-LOGIC Control Inputs

OM-295

OM-811

*OPTIONAL

Note: The wiring diagram (found

on the inside of the humidifier

control cabinet) will show the proper

controls wiring.

CONTROL

PANEL

SHIELD GND

* FREEZE PROTECTION

AQUASTAT

AIR FLOW SWITCH

4-20 MA

0-100% RH

* TEMPERATURE

COMPENSATION

TRANSMITTER

(T184) 4-20

MA -29° TO

49° C

* HIGH LIMIT

HUMIDITY

TRANSMITTER

4-20 MA

0-100% RH

CONTROL

HUMIDITY

TRANSMITTER

1.0 mm

SHIELDED CABLE

TERMINAL

BLOCK J8

HIGH LIMIT

HUMIDISTAT

0-135 OHM, 6-9 VDC,

4-20 MA CONTROLLER

(SUPPLIED BY

OTHERS)

VL MASTER BOARD

TERMINAL BLOCK J8

CONTROL

PANEL

SHIELD GND

FREEZE

PROTECTION

AQUASTAT

(OPTIONAL)

1.0 mm

SHIELD

CABLE

BREAK

RISE

WIRING OF SENSING DEVICES

Important: Consult control cabinet wiring diagram. Control changes require wiring and

programming changes.

(T184-H) 4-20

MA -29° TO

71° C

AIR FLOW

SWITCH

1 2 3 4 5 6 7 8 9 10 11 ... 51 52

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DriSteem Vapor-Logic Guía de instalación Pagina 6

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