Product Overview

Table Of Contents
F-15479-10 © Copyright 2010 Schneider Electric All Rights Reserved. 15
Typical Actuators: MP-367, MP-377, and MP-387.
Typical Schneider Electric Microtherm Controllers: PP-22x Series, TP-2xx
Series, TP-3xx Series, TP-4xx Series, and TP-101x Series.
C =Common of switch to R and B.
1 =Feedback from actuators (24 Vac with both actuators full CCW to 12 Vac both full CW).
R =Closes on temperature (pressure) drop and drives the actuator CCW (opens valve).
B =Closes on temperature (pressure) rise and drives the actuator CW (closes valve).
Sequence of Operation
On a temperature rise, the controller completes a circuit through B to terminal 2 of actuator
number one, causing CW rotation. When actuator number one reaches the CW end of
travel, it transfers the control circuit to actuator number two, causing it to rotate CW.
Conversely, on a temperature drop, first actuator number two, then actuator number one
rotates to CCW end of travel.
Figure-11 External Wiring for Schneider Electric Microtherm Controller with 24 Vac Sequencing Actuators.
4 5
6 7
3
8
2
H
1
G
x
Green Wires
To 24 Vac
Power Supply
Case
Ground Screw
C
2
R
1
B
4 5
6 7
3
8
2
H
1
G
X
Green Wires
Case
Ground Screw
Add
Jumper
Add Resistor
(Supplied With Actuator)
Splice
100
Add
Jumper
Actuator Number 1
Typical Actuators: MP-367,
MP-377, and MP-387
Remove
Jumper
Actuator Number 2
Typical Actuators: MP-367,
MP-377, and MP-387