DriSteem Vapor-Logic Guide de dépannage télécharger pdf (Page 20)

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Airflow proving switch

Connect wiring for a duct, Space Distribution Unit (SDU) airflow

proving switch by inserting wires into the terminal block plug at

P13 (labeled AFsw and 24) per the wiring diagram on the next

page. Tighten screws; maximum torque is 3 in-lb (0.34 N-m).

(An SDU is a cabinet fan dispersion assembly.)

See also “Sensor placement” on Page 26.

Duct high limit switch or transmitter

Connect wiring for a duct high limit switch or transmitter by

inserting wires into the terminal block plug at P13 (labeled DHL

and 24) per the wiring diagram on the previous page. Tighten

screws; maximum torque is 3 in-lb (0.34 N-m).

Note: The duct high limit sensor connected at this location can

be an on-off high limit switch, or it can be a duct high limit

transmitter with an adjustable high limit set point (4-20 mA input).

See also “Sensor placement” on Page 26.

Terminal P13

Figure 16-1:

Terminal P13

Terminal P13:

24VDC = Power to duct high limit switch or transmitter

DHL = Duct high limit switch/transm. (4-20 mA input)

VAC = Power to airflow proving switch

AFsw = Airflow proving switch (24 VAC Input)

Installation

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DriSteem Vapor-Logic Guide de dépannage Page 20