Orion-system Lead Controller Manual de usuario descargar pdf (Pagina 24)

Section 6: Conﬁ guring Relays

Lead/Lag Controller Technical Guide

Timers

The Changeover Interval is the amount of time the ﬁ rst device will

run before it switches to a backup device. See Figure 36. It can be

set up to a maximum of 1488 hours.

The Proof Failure Timeout Delay establishes the time the controller

will wait to prove that the Lead device is running correctly before

switching to Lag device and generating an alarm. If it is a pump, it

could be proof of water ﬂ ow or pressure, and if it is an air handling

unit, it might be temperature or proof of air ﬂ ow. See Figure 36.

Figure 36: Timers Window

Binary Input Activation (Enable)

Control of the Lead/Lag devices must be initiated based on a Binary

Input Activation (Enable) and/or an Activation Schedule. Binary

Inputs #1 - #4 are used as Activation Binary Inputs. If no Activation

Schedule is conﬁ gured, the Lead/Lag operation will be initiated

solely on the basis of a Binary Input Activation. If both a Binary

Input Activation and an Activation Schedule and are selected, the

Lead/Lag operation will be active when the Binary Input is active

and the Schedule is Occupied.

Figure 35: Binary Input Activation Window

Binary Input Activation and Timers

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 55 56

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Orion-system Lead Controller Manual de usuario Pagina 24