Honeywell T775M2014 User Manual

INSTALLATION INSTRUCTIONS
62-0254-13
T775A/B/M Series 2000
Electronic Stand-Alone
Controllers
PRODUCT DESCRIPTION
The T775 electronic stand-alone controllers are the next
generation of commercial and agricultural controls
capable of remote sensing of temperature and providing
switched and/or proportional outputs to various types of
loads.
Five models have analog (modulating) outputs for
actuator and motor control, and NEMA-4 weatherproof
enclosures are available for wet environments.
IMPORT ANT
Each T775A/B/M controller is an operating
control, not a limit or safety control. If used in
applications requiring safety or limit controls, a
separate safety or limit control device is
required.
Table 1. T775A/B/M Controller Configurations.
Controller
Model
a
a
All models include a digital input for use with the disable or setback option.
Description Replaces
SPDT
Relay
Outputs
Analog
(Mod)
Outputs
b
b
The modulating (analog) outputs are 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable.
Floating
Outputs
c
c
Each floating output eliminates two SPDT relays.
Sensor
Inputs
Nbr of
Sensors
Included Enclosure
T775A2009 Standard T775A1001 1 None None 1 1 NEMA 1
T775B2016 Standard N/A 2 None 1 2 1 NEMA 4X
T775B2024 Standard T775C1009 T775D1008 4 None 2 2 1 NEMA 4X
T775B2032 Standard T775A1019 T775B1000 2 None 1 2 1 NEMA 1
T775B2040 Standard T775A1027 T775A1035
T775B1018 T775B1026
T775B1042
4None2 21 NEMA 1
T775M2006 Modulating N/A None 2 N/A 2 1 NEMA 1
T775M2014 Modulating T775G1005 T775G1013
T775G1021 T775G1039
42 N/A
2
d
d
These models can support a high/low modulating limit at Sensor B for temperature control at Sensor A.
1 NEMA 4X
T775M2022 Modulating N/A 2 2 N/A
2
d
1 NEMA 4X
T775M2030 Modulating T775E1114 T775F1022
T775F1055 T775F1089
42 N/A
2
d
1 NEMA 1
T775M2048 Modulating T775E1015 T775E1023
T775E1056 T775E1064
T775E1098
22 N/A
2
d
1 NEMA 1
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Honeywell T775M2014 Specifications

General

Type	Electronic
Input Voltage	24 VAC
Display	LCD
Control Output	Relay
Mounting	Surface
Input	Thermistor
Output	Relay

Summary

T775 Application Tips

Compatible Components

Temperature Sensors

Lists compatible temperature sensors for T775 controllers.

Humidity Sensors (T775U only)

Details compatible humidity sensors for the T775U model.

Low Differential Pressure Sensors (T775U only)

Lists compatible low differential pressure sensors for T775U.

Universal Sensors (T775U only)

Describes universal sensor compatibility for the T775U model.

Actuators

Lists compatible actuators for T775 controllers.

Features

T775 Operations

Integral Action

Explains integral action for minimizing droop and hunting.

Derivative Action

Describes derivative action for PID control and its effect.

Differential vs. Throttling Range

Differentiates differential for relays and throttling for modulating outputs.

Setpoint and Differential

Explains setpoint and differential relationships for heating/cooling.

Throttling Range

Defines throttling range for modulating and floating outputs.

Throttling Range for Modulating High or Low Limit

Details throttling range for modulating high/low limit functions.

Setpoint High Limit

Describes setting an irreversible maximum setpoint limit.

Reset Programming (T775L, T775P, T775R, and T775U Models Only)

Reset Example

Illustrates programming a reset curve for outputs.

Setpoint Offset

Explains how to offset setpoints for subsequent outputs.

Setback (Optional) Description

Setback (optional) Example

Provides an example of using setback for temperature reduction.

T775 Applications

Water Source Heat Pump Loop Water Controller – T775B

Details T775B application for heat pump loop water control.

Chiller – T775B

Chiller, Rotary Compressor – T775B

Cooling Tower Control – T775B2040

Device Checkout

Procedures to verify the performance of the T775B2040.

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

Damper or Valve Modulation – T775M or T775R

Hot Water Reset - T775R

Hot Water Reset (continued)

Device Checkout

Steps to check the operation of the T775R for hot water reset.

Chilled Water Reset – T775R

Chilled Water Reset (continued)

Device Checkout

Procedures to verify the T775R's performance in chilled water reset.

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)

Device Checkout

Steps to verify the functionality of the 4-stage controller.

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

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 T775R as a Differential Temperature Controller for Solar Water Heating

Maintaining Differential Temperature for both Heating and Cooling

T775 Application Replacement Examples

T775M2030 Replacement for W973A Logic Panel

Guide for replacing W973A logic panel with T775M2030.

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

Johnson System 350

Cross-reference for Johnson System 350 controls to T775 models.

Honeywell

Cross-reference for Honeywell controls to T775 models.

Table 6. Cross Reference. (Continued)

Honeywell

Continues Honeywell cross-reference to T775 models.

Table 6. Cross Reference. (Continued)

Honeywell

Continues Honeywell cross-reference to T775 models.

Table 6. Cross Reference. (Continued)

Honeywell

Continues Honeywell cross-reference to T775 models.

Table 6. Cross Reference. (Continued)

Honeywell

Continues Honeywell cross-reference to T775 models.

Table 6. Cross Reference. (Continued)

Johnson (Mechanical)

Cross-reference for Johnson Mechanical controls to T775 models.

Table 6. Cross Reference. (Continued)

Johnson (Mechanical)

Continues Johnson Mechanical cross-reference to T775 models.

Table 6. Cross Reference. (Continued)

White Rodgers

Cross-reference for White Rodgers controls to T775 models.

Table 6. Cross Reference. (Continued)

White Rodgers

Continues White Rodgers cross-reference to T775 models.

Barber Colman

Cross-reference for Barber Colman controls to T775 models.

Table 6. Cross Reference. (Continued)

Barber Colman

Continues Barber Colman cross-reference to T775 models.

Ranco

Cross-reference for Ranco controls to T775 models.

Table 7. Cross Reference. (Continued)

Tekmar Model & T775 Cross

Cross-reference for Tekmar models with T775.