Product Overview

Table Of Contents
F-15479-10 © Copyright 2010 Schneider Electric All Rights Reserved. 17
Typical Schneider Electric Microtherm Controllers: TP-2xx Series, TP-3xx
Series, and TP-4xx Series.
C =Common of switch to R and B.
1 =Feedback from actuator (24 Vac with actuator full CCW to 12 Vac at CW end).
R =Closes on temperature drop and drives the actuator CCW (closes damper).
B =Closes on temperature rise and drives the actuator CW (opens damper).
Cycle of Operation
With the fan running:
1. Rotates actuator to CCW end (damper closed).
2. Allows actuator to modulate between 33% from CCW end to CW (damper open).
3. Allows actuator to modulate between 50% from CCW end to CW (damper open).
4. Allows actuator to modulate between 67% from CCW end to CW (damper open).
5. Rotates actuator to CW end (damper open).
When the fan is off, the damper is closed.
Figure-13 External Wiring for Schneider Electric Microtherm Controller with Five-Position Line Voltage Actuator.
4
5
6 7
3
8
2
L1
1
L2
X
Green Wire
To AC
Power Supply
Case
Ground Screw
C
2
R
1
B
Blue
SPDT Relay
To Load of
Fan Motor
Starter. The
Coil Voltage
Same as
Fan Motor.
Typical Actuators:
MP-470, MP-480, and MP-4701
Five-Position Switch
1
Close
3
2
5
Open
4
Red
Actuator
Transformer Leads