DriSteem Vapor-Logic Guía para resolver problemas descargar pdf (Pagina 16)

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Connect control input signal wiring by inserting wires into

Terminal P11 (labeled 24, RH, and ground) per the wiring

diagram on the next page. Tighten screws; maximum torque is

3 in-lb (0.34 N-m).

Allowed inputs at Terminal P11 include:

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Transmitters provide a signal proportional to the RH or dew

point being measured. All transmitters provided by

DRI-STEEM are two-wire devices using a 4 to 20 mA signal.

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Demand signals are sent to the Vapor-logic4 board from another

control system such as a building automation system. These

systems have their own RH or dew point transmitters, calculate

required humidifier output, and send a demand signal to the

humidifier to create steam at a percentage of that humidifier’s

capacity. Demand signals are typically 0-10 VDC or 4-20 mA,

but may also come from a DDC signal via Modbus, BACnet, or

LonTalk.

A humidistat also delivers a demand signal to the humidifier,

but it is not typically used with Vapor-logic4.

Humidistats provide either on-off control or modulating control.

DRI-STEEM humidistats are powered by a 24 VDC supply

provided by the Vapor-logic4 control board.

When using modulating control, the signal from a humidistat

directly controls the amount of output from the humidifier.

Notes:

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operation, see “Control input signals” on Page 14.

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for more information about input signals.

Figure 12-1:

Terminal P11

Terminal P11:

24VDC = Power to space RH sensor

RH = Space RH input (RH transmitter, dew point

transmitter, humidistat, or demand signal by

others) (4-20 mA or 0-16 (typ. 0-10) VDC input

= Ground for demand signal by others

Terminal P11

Note:

If you do not know which control

components were ordered with your system,

contact DRI-STEEM or connect your keypad/

display to the Vapor-logic4 board per the

instructions on Page 19. Go to the Setup

menu per the instructions on Page 28 to

view system parameters that were factory

configured as ordered.

Installation

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DriSteem Vapor-Logic Guía para resolver problemas Pagina 16

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