Orion System Lead Controller - Manual (Page 22)

Section 6: Confi guring Relays
Lead/Lag Controller Technical Guide 22
Control Method and Control Source
Control Method
The Control Method Drop Down Menu (Figure 28) is located on
the top left of the Relay Confi guration Screens (Figure 26 & 27,
page 20 & 21). As you select items, the corresponding fi elds that
you need to fi ll out will become available. Fields that do not pertain
to the confi guration at hand will be greyed out.
Figure 28: Control Method Drop Down Menu
For Lead/Lag confi guration, one relay will be the Lead and up to
seven can be the Lag, and they are confi gured from their own Relay
Confi guration Screens. For 2 Lead / 1 Lag, two relays are Lead and
one is Lag and all three relays are confi gured from Relay #1 screen.
The choices are one of the following methods of control listed below:
● Not Confi gured
● Lead Relay
● Lag Relay
Lead Relay – If this option is selected, you can also select a Control
Source input in the next fi eld to be used as a Proof of Operation to
allow switching to the Lag Relay upon a failure. This proof can
either be a binary contact activation or an analog input level. If
your Proof is an analog input level, you can then confi gure either
an Increasing or Decreasing Proof Setpoint (Figure 30, page 23).
If your Proof is a Binary Input, the Proof Failure is initiated when
the selected Binary Input is “Active” (See Binary Input Activation
Window, Figure 35, page 24.)
In the Timers Window (Figure 36, page 24) found at bottom left of
the Lead/Lag Relay Confi guration Screen (Figure 26, page 20), you
can confi gure a Lead/Lag Changeover Interval and a Proof Failure
Timeout Delay.
Lag Relay – This Lag Relay will follow the same confi gurations
as the Lead Relay.
Figure 29: Control Source Field
Control Source
The Control Source Options in the Control Source Drop Down Menu
(Figure 29) are shown below:
● Not Confi gured
● Analog Input #1
●
Analog Input #2
● Analog Input #3
● Analog Input #4
● Analog Input #5
● Analog Input #6
● Analog Input #7
● Analog Input #8
●
Proof Input #1
● Proof Input #2
● Proof Input #3
● Proof Input #4
● Outdoor Air