Damper Or Valve Modulation - T775M Or T775R - Honeywell T775 Series 2000 Application Manual

Damper or Valve Modulation – T775M
or T775R
Application Description
In this example, a T775M is controlling an actuator, based on
temperature input, to modulate a damper or valve.
Sensor Designation
This device application requires one sensor.
• Sensor A is sensing outside temperature
NOTE: Sensor A or Sensor B can be used in this
application.
Programming Example
Program in Setup for:
— Modulating Output (MOD) 1:
Type = 2-10V (or whatever output signal is preferred)
Minimum Output % = 0% (range is 0-100%)
Modulating Output 1:Enable actuator circuit
Program for:
— Setpoint = 120° F (49° C)
— Throttling Range = 10° F (-12° C)
— Sensor = Sensor A
— Heat or Cool
IMPORTANT
After the desired value is selected, be sure to press
the  or  or HOME button in order to save that
value in the controller's memory.
Wiring
See Fig. 8 and 9 for wiring connections for the T775M with
examples of an MS75xx actuator and an ML7425 valve
actuator.
T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
MS75xx
SPRING RETURN
DIRECT COUPLED ACTUATOR (DCA)
WIRING
STRIP
1
2
3
4
5
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
Fig. 8. T775M wiring — damper modulation
ML7425
WIRING
SPRING RETURN
STRIP
VALVE
ACTUATOR
T2
1
T1
L1
(HOT)
O1
O2
L2
TS
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
Fig. 9. T775M wiring — valve modulation (2-10 Vdc
13
L1
(HOT)
1
L2
C
MOD 1
B S
–
R V
+
W
T
T
(2-10 Vdc shown).
F
+
–
MOD 1
B
–
R
+
W
shown).
SENSOR A
T775M
M24881A
SENSOR A
C
S
V
T775M
T
T
M28042
63-7147—05