Honeywell T775 Series 2000 - User Manual

APPLICATION GUIDE AND CROSS REFERENCE
63-7147-05
T775 Series 2000 Electronic
Stand-Alone Controllers

Honeywell T775 Series 2000 Specifications

General

Brand	Honeywell
Model	T775 Series 2000
Category	Controller
Language	English

Summary

T775 Application Tips

T775 Operations

Integral Action

Derivative Action

Differential vs. Throttling Range

Setpoint High Limit

Reset Programming (T775 L, T775 P, T775 R, and T775 U models only)

Details programming reset curves for specific T775 models.

Setback (Optional) Description

T775 Applications

Water Source Heat Pump Loop Water Controller - T775 B

Application example for T775B in heat pump loop water control.

Chiller - T775 B

Application example for T775B in chiller control systems.

Chiller, Rotary Compressor - T775 B

Application example for T775B controlling rotary compressors.

Cooling Tower Control - T775 B2040

Application example for T775B2040 in cooling tower fan control.

Time-based Control of Fan, Pump, etc. - T775 (all models)

Application example for time-scheduled operation of devices.

Damper or Valve Modulation - T775 M or T775 R

Application example for modulating dampers or valves.

Hot Water Reset - T775 R

Application example for T775R in hot water reset control.

Chilled Water Reset - T775 R

Application example for T775R in chilled water reset control.

Multi-Stage Boiler Control (No Reset) - T775 P

Application example for T775P in multi-stage boiler control without reset.

Multi-Stage Boiler Control (Reset) - T775 P

Application example for T775P with reset in multi-stage boiler control.

4 Stage with Pump Output and Reset - T775 P using a T775 S Expansion Module

Advanced boiler control example with pump and reset.

3 Stage Reciprocating Chiller - T775 L

4 Stage Heat and 6 Stage Cool - T775 L

Pressure with a Variable Frequency Drive (VFD) - T775 U

Carbon Dioxide (CO2) Sensing - T775 U

Resetting Zone Air Temp Based on Outside Air Temp (2 stage cooling)

Resetting Discharge Air Temp Based on Return Air Temp (Modulating cooling valve)

Using the T775 R as a Differential Temperature Controller for Solar Water Heating

Maintaining Differential Temperature for both Heating and Cooling

T775 Application Replacement Examples

T775 M2030 Replacement for W973 A Logic Panel

T775 R Replacement for W964 F Aquatrol Panel with Floating Actuator

T775 L Replacement for S984 Step Controller

T775 L Replacement for W7100 C Discharge Air Controller