11
CONTROL ADJUSTMENTS
To enable the Economy Mode, locate
terminals TB1-75 and TB1-76
(See Fig. 9)
on the I/O Board, located at the middle
left in the control box. The board sends
voltage out on TB1-75, so no external or
field-supplied power should be applied to
the circuit or else damage to the board
could result.
To engage Economy Mode, close a
circuit between TB1-75 and TB1-76.
When that circuit is closed, the Main
CPU Board logic will automatically apply
a modifier to the temperature set point
data in memory. When the circuit is
open, no modifier will be applied.
Most often, a relay with dry contacts
that is controlled by the BMS is used to
control Economy Mode. However, a
timer, light sensor, or a simple toggle
switch could also be used to make or
break this circuit.
Fig. 9
– I/O Board
