Installation Guide
FCU Controller
26
FLOATING CONTROL
If the heating control is a modulated valve, then DO4 and DO5 are used to
increment and decrement the actuator and open the valve to increase or
decrease the heated water flow and increase or decrease the heating output.
DO4 must be wired to Heating Increment and DO5 must be wired to Heating
Decrement.
Wiring for the Heating Increment and Heating Decrement is shown in Figure
19. To wire DO4 and DO5 for Heating Increment and Heating Decrement:
1
. Connect the
HOT
terminal to the Common lead of the actuator motor.
2
. Connect the
DO4
terminal to the Increment lead of the actuator motor.
3
. Connect the
DO5
terminal to the Decrement lead of the actuator
motor.
J3
COMMON
INCREMENT
DECREMENT
ACTUATOR
MOTOR
VALVE
DO5 DO4 HOT DO3 DO2 HOT
AGND
AO1
DO1
HOT
Figure 19. DO4 and DO5 - Heating Increment and Decrement Wiring.
