Brochure
Table Of Contents
- TABLE OF CONTENTS
- T775 APPLICATION TIPS
- COMPATIBLE COMPONENTS
- FEATURES
- T775 OPERATIONS
- T775 APPLICATIONS
- Water Source Heat Pump Loop Water Controller - T775B
- Chiller - T775B
- Chiller, Rotary Compressor - T775B
- Cooling Tower Control - T775B2040
- Time-based Control of Fan, Pump, etc. - T775 (all models)
- Damper or Valve Modulation - T775M or T775R
- Hot Water Reset - T775R
- Chilled Water Reset - T775R
- Multi-Stage Boiler Control (No Reset) - T775P
- Multi-Stage Boiler Control (Reset) - T775P
- Multi-Stage Boiler Control (Reset) (continued)
- Multi-Stage Chiller Control (No Reset) - T775P
- 4 Stage with Pump Output and Reset - T775P using a T775S Expansion Module
- 4 Stage with Pump Output and Reset (continued)
- 3 Stage Reciprocating Chiller - T775L
- 4 Stage Heat and 6 Stage Cool - T775L
- 4 Stage Heat and 6 Stage Cool (continued)
- Pressure with a Variable Frequency Drive (VFD) - T775U
- Carbon Dioxide (CO2) Sensing - T775U
- T775 APPLICATION REPLACEMENT EXAMPLES
- T775M2030 Replacement for W973A Logic Panel
- T775M2030 Replacement for W973A Logic Panel (continued)
- T775M2030 Replacement for W973A Logic Panel (continued)
- T775R Replacement for W964F Aquatrol Panel with Floating Actuator
- T775R Replacement for W964F Aquatrol Panel with Floating Actuator (continued)
- T775R Replacement for W964F Aquatrol Panel with Floating Actuator (continued)
- T775L Replacement for S984 Step Controller
- T775L Replacement for S984 Step Controller (continued)
- T775L Replacement for W7100C Discharge Air Controller
- T775L Replacement for W7100C Discharge Air Controller (continued)
- T775L Replacement for W7100C Discharge Air Controller (continued)
- T775 CROSS REFERENCE
- NOTES
T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
13 63-7147—3
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 Figures 8-9 for wiring connections for the T775M with
examples of an MS75xx actuator and an ML7425 valve
actuator.
Fig. 8. T775M Wiring - Damper Modulation
(2-10 Vdc shown).
Fig. 9. T775M Wiring - Valve Modulation (2-10 Vdc shown).
M24881A
MS75xx
SPRING RETURN
DIRECT COUPLED ACTUATOR (DCA)
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
1
1
SENSOR A
T
T
C
S
V
B
R
W
+
–
MOD 1
1
2
3
5
4
T775M
WIRING
STRIP
M28042
ML7425
SPRING RETURN
VALVE
ACTUATOR
WIRING
STRIP
F
+
T2
T1
O1
O2
TS
–
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
1
1
SENSOR A
T
T
C
S
V
B
R
W
+
–
MOD 1
T775M