Honeywell T775R Application Manual And Cross Reference

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Page 1

T775 Series 2000 Electronic Stand-Alone Controllers

APPLICATION GUIDE AND CROSS REFERENCE

63-7147—3

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T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

IMPORTANT

The T775R 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.

T775 Application Tips .....................................................3

Compatible Components ...............................................3

Temperature Sensors....................................................3

Humidity Sensors (T775U only) ...................................3

Low Differential Pressure Sensors (T775U only) .........3

Universal Sensors (T775U only) ..................................3

Accessories .................................................................. 3

Features ...........................................................................4

T775 Operations ..............................................................6

Integral Action .............................................................. 6

Derivative Action ..........................................................6

Differential vs. Throttling Range ...................................6

Setpoint High Limit ....................................................... 6

Reset Programming (T775L, T775P, T775R, and

T775U models only) .....................................................7

T775 Applications ........................................................... 8

Water Source Heat Pump Loop Water Controller –

T775B .......................................................................... 8

Chiller – T775B ............................................................ 9

Chiller, Rotary Compressor – T775B ......................... 10

Cooling Tower Control – T775B2040 ..........................11

Time-based Control of Fan, Pump, etc. – T775

(all models) ................................................................. 12

Damper or Valve Modulation – T775M or T775R ...... 13

Hot Water Reset – T775R ......................................... 14

Chilled Water Reset – T775R .................................... 16

Multi-Stage Boiler Control (No Reset) – T775P ......... 18

Multi-Stage Boiler Control (Reset) – T775P .............. 19

Multi-Stage Chiller Control (No Reset) – T775P ........ 21

4 Stage with Pump Output and Reset – T775P using

a T775S Expansion Module ...................................... 22

3 Stage Reciprocating Chiller – T775L ...................... 24

4 Stage Heat and 6 Stage Cool – T775L ................... 25

Pressure with a Variable Frequency Drive (VFD) –

T775U ........................................................................ 27

Carbon Dioxide (CO2) Sensing – T775U .................. 28

T775 Application Replacement Examples ................. 29

T775M2030 Replacement for W973A Logic Panel ... 29 T775R Replacement for W964F Aquatrol Panel with

Floating Actuator ....................................................... 32

T775L Replacement for S984 Step Controller ........... 35

T775L Replacement for W7100C Discharge Air

Controller ................................................................... 37

T775 Cross Reference .................................................. 40

Notes ............................................................................. 51

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T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775 APPLICATION TIPS

Q Does the T775 save programmed values if the power is

lost?

A Yes. The T775 has an EEPROM that saves all values

entered and restores them once power is reapplied. The date and time settings are retained for 24 hours after a power outage. After a power loss of more than 24 hours, the date and time settings may need to be reentered. All other settings are stored permanently.

Q What is the time constant for the T775?

A The T775 standard sensor (50021579-001) has a time

constant of approximately 8 seconds. The T775 samples sensor input every 100 milliseconds and updates the control and display every 1 second.

Q Can sensors be shared by several T775s to simplify

installation or provide more stages?

A Each T775 must be wired to its own sensor(s), However, a

benefit of the T775 controller's high accuracy is that there is no more than a 2° differential between any two T775 controllers.

COMPATIBLE COMPONENTS

Temperature Sensors

The controller accepts 1,097 Ohms PTC at 77° F (25° C):

• 50021579-001 – Standard sensor (included with all models except T775U2006 and NEMA 4X models)

• T775-SENS-STRAP – Strap on sensor with wiring box

• T775-SENS-WR – Water resistant with 5 foot leads (included with NEMA 4X models)

• T775-SENS-WT – Watertight with 6 foot lead

• T775-SENS-OAT – Outdoor air temperature sensor

• C7031B2005 – 6 inch duct mount with wiring box.

• C7031D2003 – 5 inch immersion sensor with wiring box (use immersion well; P/N 50001774-001)

• C7031J2009 – 12 foot duct averaging sensor with wiring box

• C7046D1008 – 8 inch duct probe with mounting flange

• C7100D1001 – 12 inch fast response, duct averaging sensor with flange

• C7130B1009 – Room mount sensor

Humidity Sensors (T775U only)

The controller accepts 0-10 Vdc or 4-20 mA input with a range of 0-100%

H7625, H7635, and H7655 models (available in 2, 3, and 5% RH accuracy) can be used.

Q Can a T775 be powered with dc voltage?

A No. The T775 controllers may be powered with 24 Vac,

120 Vac, or 240 Vac only, and a separate earth ground is required.

Q Is a separate earth ground required?

A Yes. Each T775 controller must have its own earth ground,

regardless of the power source (24, 120, or 240 Vac). The earth ground must be connected to the earth ground terminal on the 24 Vac terminal block.

Q Can sensors be series-parallel wired to the T775 to provide

an average temperature?

A Yes. Sensors can be series-parallel wired to the T775. In

order to maintain control accuracy, the number of sensors wired must be of the n

Q How do I know that my selection or value has been

entered?

A Once you have selected an item from a list or entered a

value using the ! and " buttons, pressing the # or $ or HOME button accepts your selection or value and stores it in the controller’s memory.

Q What are the T775 Series 2000 Controller specifications?

A Refer to the T775 Series 2000 Electronic Stand-Alone

Controllers - Specification Data (form 63-1318-01).

power (i.e. 4, 9, 16, etc.).

Low Differential Pressure Sensors (T775U only)

P7640A pressure transducer models with selectable pressure ranges can be used.

The controller accepts pressure sensors with a signal output of 0-10 Vdc or 4-20 mA for any output range within the following ranges (the minimum and maximum for the sensor output range can be adjusted within the following limits):

-500 to 500 PSI

-30.0 to 30.0 inches w.c.

-3,000 to 3,000 Pa

-3,000 to 3,000 kPa

Universal Sensors (T775U only)

The controller accepts 0-10 Vdc or 4-20 mA input for temperature, pressure, humidity, etc. C7232 and C7632 CO sensors are also compatible but output is displayed in % instead of ppm. (Refer to Table 2 on page 29 and the T775U installation Instructions, form 62-0255-01.)

Actuators

For more information on compatible actuators or other Honeywell products, such as dampers and valves, go to www.customer.honeywell.com Product Selection Tool under Products.

• Spring return models: ML6425, ML7425, MS4105, MS4110, MS4120, MS7505, MS7510, MS7520, MS8105, MS8110, MS8120

• Non-spring return models: ML4161, ML6174, ML7161, ML7164, MN1010, MN6105, MN7505, MN8810

. From the home page select

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T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

See form 62-0265 - Temperature Sensor for the T775 Series

2000 Stand-alone Controller

Accessories

• 107324A – Bulb Holder, duct insertion

• 107408 – Heat Conductive Compound, 4 ounce

• 50001774-001 – Immersion Well, stainless steel 304, 1/2 in. threading

FEATURES

In Table 1, a check mark (!) indicates that the controller model has this feature. A number indicates the quantity (e.g., the T775M2030 has 4 standard SPDT relay outputs), and “n/a” indicates the feature is not applicable to that controller model.

Table 1. T775 Controller Features by Model Number.

Feature

User Interface

2x4 inch LCD display with English language display !!!! !!!!!!!!!!!!!!n/a

Keypad lockout !!!!!!!!!!!!!!!!!!n/a

Applications

Standard heating/cooling !!!!!!!!!!!!!!!!!!!

Modulating !!!!! !! !!

Boiler/Chiller !!!!!!!!!!!!!!!!!!!

Reset ! !!!!!!!!

Stage (Loop) control of up to 12 relays !! !

Temperature, humidity, pressure, or other application requiring 0-10 Vdc or 4-20 mA input

Expansion module (4-relays per module; 2 modules max.)

Power

24 or 120/240 Vac with separate earth ground !!!!!!!!!!!!!!!!!!!

Relay Outputs

SPDT !!!!!!!!!!!!!!!!!!!

Number of standard 1242440424244422024

Number of floating (each floating output eliminates 2 relays)

Runtime displayed on relays 1-4 (optional) !!!!!!!!!!!!!!!!!!n/a

Configurable minimum off time !!!!!!!!!!!!!!!!!!!

Expandable to 12 relays using T775S expansion modules (4 relays per expansion module)

Warm weather shutdown ! n/a

Modulating Outputs

Number of outputs 0000002222200220220

Independently selectable for 0-10 Vdc, 2-10 Vdc, 4-20 mA, or Series 90

Modulating high/low limit control !!!! ! n/a

Digital Output

Number of outputs 0000000000010000000

High, low, and differential alarm !

T775A2009

T775B2016

T775B2024

T775B2032

T775B2040

0121200000002001000

T775M2006

T775M2014

T775M2022

T775M2030

T775L2007

!! !

!!!!! !! !!

T775M2048

T775R2001

T775P2003

T775R2019

T775R2027

T775R2035

T775R2043

T775U2006

T775S2008

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T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Table 1. T775 Controller Features by Model Number. (Continued)

T775M2006

T775M2014

T775M2022

T775M2030

T775A2009

T775B2016

T775B2024

T775B2032

T775B2040

T775L2007

T775M2048

T775R2001

T775R2019

T775R2027

T775R2035

T775R2043

T775P2003

T775U2006

T775S2008

Feature

Pump Output (configurable for last relay)

Number of outputs 0000000000010000001

Prepurge/Postpurge !!

Pump Exercise !!

Sensor Inputs

Number of sensor inputs 1222222222232222220

Number of sensors included 111111111113222220n/a

1097 Ohms PTC at 77° F (25° C) !!!!!!!!!!!!!!!!!!n/a

0-10 Vdc or 4-20 mA input for temperature, humidity,

! n/a

pressure, etc.

Calibration capability ±10° F (±6° C) or

!!!!!!!!!!!!!!!!!!n/a

for T775U, ±10% of sensor range

1° sensed temperature accuracy !!!!!!!!!!!!!!!!!!n/a

Sensed temperature range from -60° to 270° F

!!!!!!!!!!!!!!!!!!n/a

(-51° to 132° C)

Digital Input

Number of inputs 1111111111111111111

Setpoints

Maximum number of setpoints 124244264641464224n/a

Range -40° to 248° F (-40° to 120° C) !!!!!!!!!!!!!!!!!!!

Maximum high setpoint option (irreversible) !!!!!!!!!!!!!!!!!!n/a

Integral and Derivative Options

Integral time selectable from 0 to 3,600 seconds ! !!!!!!!!!!!!!!!!!n/a

Derivative time selectable from 0 to 3,600 seconds !!!!!!!!!!!!!!!!!!n/a

Stag ing

Standard staging !! !

First on, first off !!

Equalized runtime !!

On delay and Off delay between stages !! !

Time Clock Scheduler

DST option !!!!!!!!!!!!!!!!!!n/a

2 events per day !!!!!!!!!!!!!!!!!!n/a

Selectable for setback, disable, or ignore to control

!!!!!!!!!!!!!!!!!!n/a

all outputs

Enclosures

NEMA 1 ! !!!! !!!!!!!!! !

NEMA 4X !! !!

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T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775 OPERATIONS

Integral Action

“Droop” and equipment hunting can be minimized by summing (integrating) the offset errors over time and adding this correction to the output voltage.

A non-zero value for the integral time will allow the controlled temperature to try and reach the setpoint value.

The integral time is factory set for 400 seconds and is similar to the response time to the T775 Series 1000 models. This is a good middle range and should satisfy many applications. The integral time can be increased for applications where sensed response is slow, and can be decreased for applications where sensed response is fast (e.g. discharge air control).

As a starting point, an optimal integral time for discharge air typically ranges from 12 to 200 seconds. An optimal integral time for room control typically ranges from 60 to 2,500 seconds. The purpose of integral action is to reduce or eliminate the offset from setpoint during steady state control that is often seen in proportional-only control.

Keep in mind that the controller is most sensitive to throttling range. Adjust the throttling range first before making any adjustment to integral time. Adjust throttling range to be as wide as possible to start, because this will provide the most stable control. Remember that the integral will eliminate the steady state error so you do not need to have a small throttling range to have accurate control. (Integral action allows for controlling to setpoint even with a wide throttling range.)

Derivative Action

Proportional-integral-derivative (PID) control adds the derivative function to PI control. The derivative function opposes any change and is proportional to the rate of change. The more quickly the control point (actual sensed temperature) changes, the more corrective action the PID system provides.

Differential vs. Throttling Range

Differential is used for relay outputs, and throttling range is used for modulating outputs.

Setpoint and Differential

The following describes the relationship between setpoint and differential for heating and cooling. These settings are programmed for each output relay.

HEATING MODE SETPOINT AND DIFFERENTIAL

In heating mode, the differential is below the setpoint. The relay de-energizes when the temperature rises to the setpoint. As the temperature drops to the setpoint minus the differential, the relay energizes.

COOLING MODE SETPOINT AND DIFFERENTIAL

In cooling mode, the differential is above the setpoint. The relay de-energizes when the temperature falls to the setpoint. As the temperature rises to the setpoint plus the differential, the relay energizes.

Throttling Range

The throttling range brackets the setpoint setting, e.g., if the setpoint is 72° F (22° C) and the throttling range is 10° F (-12° C), then the effective throttling temperature range is 67° to 77° F (19° to 25° C) . This applies to both modulating outputs and floating outputs.

Throttling Range for Modulating High or Low Limit

On models that support this feature, the throttling range for the modulating high or low limit positions the setpoint at the end of the throttling range. For example, with a high (Heat) limit at sensor B of 200° F (93° C) and a throttling range of 10° F (-12° C), the modulating output controlling sensor A begins to throttle back at 190° F (88° C), and fully closes at 200° F (93° C). Conversely, the throttling range for the low limit begins above the Cooling setpoint in the same manner.

If the control point moves away from the setpoint, the derivative function outputs a corrective action to bring the control point back more quickly than through integral action alone. If the control point moves toward the setpoint, the derivative function reduces the corrective action to slow down the approach to the setpoint, which reduces the possibility of overshoot. The rate time setting determines the effect of the derivative action. The rate time is the time interval by which the derivative function advances the effect of the proportional action. In T775 controllers, the derivative rate time can range from 0 to 3,600 seconds. The higher the derivative setting, the greater the effect.

For all T775 Series 2000 controllers, the derivative default value is factory set to zero (no derivative control). It is strongly recommended that the derivative remain at zero (0) unless you have a very good reason to adjust it. Derivative control is not needed in the vast majority of HVAC applications.

63-7147—3 6

Setpoint High Limit

You can set an irreversible setpoint high limit maximum value for any single setpoint temperature value. This prevents the user from setting any setpoint above the chosen high setpoint limit, which is useful for meeting some local codes.

Adjust the setpoint (at any output) to the desired maximum setpoint. Then, simultaneously press the HOME, #, and $ buttons, and continue to press all three buttons for five seconds to set the setpoint high limit maximum to this value.

NOTE: You must press all three buttons at exactly the same

time for this action to occur.

IMPORTANT

1. This action sets the maximum setpoint value of all outputs to the setpoint high limit maximum.

2. Setting the high limit setpoint maximum is irreversible. If you perform the action inadvertently and this setpoint adversely affects the control of your system, you must replace the controller.

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T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Reset Programming (T775L, T775P, T775R, and T775U models only)

To program an output for reset, refer to the values as shown in the example below and in Fig. 1. Choose your own appropriate values for Sensor A maximum and minimum and Sensor B maximum and minimum.

Reset Example:

• Sensor A is the boiler sensor and sensor B is the outdoor sensor.

• Maximum boiler temperature desired is 210° F (99° C) when the outdoor temperature is 20° F (-7° C).

• Minimum boiler temperature desired is 160° F (71° C) when the outdoor temperature is 70° F (21° C).

With the above settings example, when the outdoor temperature is 50° F (10° C), the effective setpoint is 180° F (82° C).

Setpoint Offset

NOTE: The Setpoint Offset is used for subsequent outputs

only.

This value is the number of degrees plus (+) or minus (-) that you want the temperature to be offset from the first output’s setpoint. See Fig. 1. For example, If you want the second output setpoint to be 10° F (-12° C) less than the first output setpoint, enter -10° F (-23° C).

°F

SP MAX A1

(BOILER MAX)

SP MIN A2

(BOILER MIN)

Fig. 1. Reset Curve with Offset for Subsequent Outputs.

The reset curve established when programming the first output (Fig. 1) is then used for all subsequent outputs that are configured for Reset = YES, and each of those outputs will be offset from this curve.

220

210

200

E N

190

S O

180

170

160

150

140

RELAY 2

SETPOINT

OFFSET

-10°F

RESET B1

(OUTSD MIN)

30 40 50 60

SENSOR B

RELAY 1 SETPOINT

RESET B2

(OUTSD MAX)

°F80

M24862

Choose Reset = NO for any outputs you do not wish to reset, then press the HOME button to record your selection.

NOTES:

1. A single reset curve is programmed for the first output and is used by all outputs setup for Reset.

2. For subsequent outputs, a setpoint offset is used if that output is also being Reset.

When Reset is programmed, the home screen conveniently displays the calculated Heat/Cool setpoint(s) for the outputs based on the reset curve.

Setback (Optional) Description

The Setback temperature option is available only if scheduling is enabled or the Digital Input Option is set to Setback.

This value is the number of degrees plus (+) or minus (-) that you want the temperature to be setback (offset) from the setpoint at a predetermined time.

For example, if you want the temperature to be 10° F (-12° C) less than the setpoint during setback mode, enter -10° F (-23° C). See Fig. 2

In normal operations for heating, the offset will be a negative value; for cooling, the offset will be a positive value.

Setback (optional) Example:

• Setback of -10° F (-23° C) is used to drop the temperature at night by 10° F (-12° C).

With the above settings example, when the outdoor temperature is 50° F (10° C), the effective setback setpoint is 170° F (77° C) 180° F (82° C) setpoint minus the 10° F (-12° C) setback).

°F

220

SP MAX A1

(BOILER MAX)

SP MIN A2

(BOILER MIN)

Fig. 2. Reset Curve for First Output with Setback Offset.

210

200

E N

190

S O

180

R A

170

160

150

140

(OUTSD MIN)

RESET B1

SETBACK

OFFSET

-10°F

30 40 50 60

SENSOR B

(OUTSD MAX)

RESET B2

°F80

M24861

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T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775 APPLICATIONS

Water Source Heat Pump Loop Water Controller – T775B

Application Description

Water is circulated in a loop to remove waste heat and to provide cooling from a multiple heat pump system. In this example, the T775B controls heating and cooling systems to maintain the loop water temperature between preset upper and lower limits. Alarms are sounded to annunciate abnormally high or low water temperatures.

NOTE: T775R reset models can also be used in this

application.

Sensor Designation

This device application only requires one sensor. Sensor A is mounted in a well, located in the main loop water line before the water source heat pump take-offs.

Operation

In this example, if the loop water temperature drops to 55° F (13° C), heat is added to the system by the boiler (Relay 1) until it reaches the setpoint. If the temperature drops further, Relay 2 sounds the low temperature alarm at 54° F (12° C).

If the loop water temperature rises to 95° F (35° C), Relay 3 brings on cooling. If the temperature rises to 96° F (36° C), Relay 4 powers the high temperature alarm.

NOTE: If no alarms are present, Relay 2 and 4 may be used as additional heating and cooling relays.

Programming Example

Relay 1: Enables boiler circuit Program for:

—Heat — Setpoint = 65° F (18° C) — Differential = 10° F (-12° C)

Relay 2: Low temperature alarm circuit Program for:

—Heat — Setpoint = 55° F (13° C) — Differential = 1° F (-17° C)

Relay 3: Enables cooling circuit (heat extraction) Program for:

—Cool — Setpoint = 85° F (29° C) — Differential = 10° F (-12° C)

Relay 4: High temperature alarm circuit Program for:

—Cool — Setpoint = 95° F (35° C) — Differential = 1° F (-17° C)

Setpoints may differ according to equipment manufacturers. See their recommendations.

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

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

SENSOR A

(LOOP WATER)

T T

T775B

(HOT)

HI TEMP

ALARM

ADD

HEAT

LO TEMP

ALARM

SUBTRACT

HEAT

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

RELAY

120

COM

120 VAC

240

M24863

63-7147—3 8

Fig. 3. T775B Wiring - Loop Water Controller.

Page 9

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Chiller – T775B

Application Description

As the water temperature in the sump rises, the T775B sequentially cycles on the spray pump valve and two relays of fans. If the water temperature in the sump drops below 40° F (4° C), the T775B energizes a sump dump drain valve to prevent system freeze up.

NOTE: T775R reset models can also be used in this

application.

Sensor Designation

This device application only requires one sensor. Sensor A is sensing sump water temperature.

Operation

In this example, the sump water temperature rises above the Cooling relay 1 setpoint plus differential 65° F (18° C) to bring on the spray pump valve. If the temperature continues to rise, Cooling relays 2; 70° F (21° C) and 3; 75° F (24° C) energize the evaporation fans as needed.

If the sump water temperature drops below 40° F (4° C) (setpoint minus differential), the sump water freeze up protection is provided by energizing Heating relay 4.

Relay 4: Controlling dumping of sump at freeze condition Program for:

— Heat — Setpoint = 50° F (10° C) — Differential = 10° F (-12° C)

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

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

SENSOR A

(SUMP WATER)

T T

T775B

Programming Example

Relay 1: Controlling spray water pump and/or valve Program for:

— Cool — Setpoint = 60° F (16° C) — Differential = 5° F (12° C)

Relay 2: Controlling fan # 1 Program for:

— Cool — Setpoint = 65° F (18° C) — Differential = 5° F (12° C)

Relay 3: Controlling fan # 2 Program for:

— Cool — Setpoint = 70° F (21° C) — Differential = 5° F (12° C)

(HOT)

SUMP DUMP VALV E

SPRAY

PUMP

VALV E

FAN

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE

TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

RELAY

Fig. 4. T775B Wiring - Chiller.

120

COM

120 VAC

240

M24864

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Page 10

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Chiller, Rotary Compressor – T775B

Application Description

The T775B is controlling the discharge water temperature of a rotary compressor. The T775B provides an optional low temperature or low pressure cut-out circuit.

NOTE: T775R reset models can also be used in this

application.

Sensor Designation

This device application only requires one sensor. Sensor A is sensing discharge water and controls 1 or 2 compressors.

Operation

In this example, the cooling capacity of a Rotary Compressor is controlled by a slide valve, which when moved towards open or closed, allows more or less refrigerant into the compressor. Open and Closed solenoid valves position this slide valve. The T775B is configured such that two relays are used to position a single slide valve in a floating mode by controlling the respective solenoid valves. Capacity of rotary compressors may also be controlled by variable speed drives, not covered here.

Programming Example

Relay 1: Compressor #1 controlling the Close solenoid valve Program for:

—Cool — Setpoint = 52° F (11° C) — Differential = 2° F (-17° C)

Relay 2: Compressor #1 controlling the Open solenoid valve Program for:

—Cool — Setpoint = 56° F (13° C) — Differential = 2° F (-17° C)

Relay 3: Compressor #2 controlling the Close solenoid valve Program for:

—Cool — Setpoint = 56° F (13° C) — Differential = 2° F (-17° C)

Relay 4: Compressor #2 controlling the Open solenoid valve Program for:

—Cool — Setpoint = 60° F (16° C) — Differential = 2° F (-17° C)

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

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

(DISCHARGE WATER)

SENSOR A

T T

T775B

RELAY

COOL MODE COMPRESSOR #1

OPEN SOLENOID

ENERGIZED

NULL

CLOSE SOLENOID

ENERGIZED

COOL MODE COMPRESSOR #2

OPEN SOLENOID

ENERGIZED

NULL

CLOSE SOLENOID

ENERGIZED

RELAY

(HOT)

COMPRESSOR

OPEN

SOLENOID

COMPRESSOR

SOLENOID

COMPRESSOR

OPEN

SOLENOID

COMPRESSOR

SOLENOID

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

T E

P E R A

T E

P E R A

2°

56°

2°

52°

2°

60°

2°

56°

Fig. 5. T775B Wiring - Chiller, Rotary Compressor.

120

T E M P E R A T U R E

120 VAC

COM

I S E

240

M24865

63-7147—3 10

Page 11

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Cooling Tower Control – T775B2040

Application Description

The T775B2040 is controlling a cooling tower fan, based on two sensor inputs, to control the low and high fan speeds and provide cold weather shutdown.

NOTE: T775R2001 reset model can also be used in this

application.

Sensor Designation

This device application requires two sensors:

• Sensor A is sensing the sump temperature.

• Sensor B is sensing the outside air temperature.

Operation

As the sump temperature increases, the low fan speed is energized by relay 1. On further increase in temperature, relay 2 closes, which energizes the high fan speed and shuts off the low fan speed. Relay 3 provides cold weather shutdown of the fan. Relay 3 is wired in series with the common wire of relays 1 and 2, so when relay 3 breaks at 55° F (13° C), power to the fan is interrupted.

Programming Example

Optional: In Setup, label sensors A and B as desired.

Relay 1: Control to the fan low speed based on the sump

temperature.

Program for:

— Setpoint = 65° F (18° C) — Differential =5° F (12° C) — Cool — Sensor A

Wiring

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring

SENSO R B - OUTSID E AIR TEM PERATUR E

SENSO R A - SUMP TE MPERATURE

T T

T775B2040

120

COM

240

120 VAC

COM

FAN

COM

RELAY

Relay 2: Control to the fan high speed based on the sump

temperature

Program for:

— Setpoint = 70° F (21° C) — Differential = 5° F (12° C) — Cool — Sensor A

Relay 3: Control to the fan cutoff based on the outside air

temperature

Program for:

— Setpoint = 55° F (13° C) — Differential = 1° F (12° C) — Cool — Sensor B

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.

IMPORTANT

By programming the relay 3 setpoint at 55° F (13° C), the T775 is wired to cutoff power to the cooling fan. Once the outside air temperature rises above 55° F (13° C), relays 1 and 2 control the fan speed based on their setpoints for Sensor A Sump.

MOTOR COMMON

LOW SPEED WINDING

HIGH SPEED WINDING

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

M25513

Fig. 6. T775B2040 Wiring for Cooling Tower Control.

Device Checkout

The T775B performance can be checked out to determine if proper operation exists.

For example, when the outside air temperature is at 55° F (13° C) or less, the fan should be off. Use the alternate Home screens to verify that the fan is on or off, based on the outside air temperature (sensor B).

NOTE: The alternate Home screens do not show live

updates of the sensor temperature. They show the temperature only at the moment the button is pressed.

1. From the Home screen, use the $ button to verify

the setpoint temperature for relay 3.

2. Then, press the HOME button to view the actual outside air temperature (sensor B).

11 63-7147—3

Page 12

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

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

Application Description

In this example, the T775B is able to energize a fan, pump, lights, economizer, or other device based on a daily time schedule rather than based on temperature.

Operation

In this example, one relay will energize at 6:00 a.m. and deenergize at 6:00 p.m. daily to operate a fan, pump, or anything at all.

Configuration Example

Place a 1,000 Ohm resistor at Sensor B (to simulate a constant 32° F (0° C) temperature reading).

Wire the device to the normally open contacts on a relay. Relay 1 is used in this example. See Fig. 7

Programming Example

Program in Setup for:

— Outputs

Options Use Scheduler = YES

NOTE: Keep in mind that if the scheduler is energized, all

relays will follow the time schedule. If you do not want some outputs to go into a setback mode, choose Scheduler = NO for those outputs, or program the setpoint and setback to the same temperature.

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

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

T775B

SENSOR B

Program in Schedule for:

— Options

Set Date = current date

Set Time = current time Set Daylight = YES or NO

— Mon-Fri

E1 Setpoint = Setpoint E1 Time = 06:00 AM E2 Setpoint = Setback E2 Time = 6:00 PM

Relay 1: Control the device (fan, pump, etc.) Program for:

— Setpoint = 0° F (-17° C) — Differential = 1° F (-17° C) — Sensor = Sensor B — Setback =100° F (38° C) — Action = Cool

Now the relay will close at 6:00 a.m. and open at 6:00 p.m., daily.

The Date must be set before the Time is set.

COM

120 VAC

240

M28021

(HOT)

RELAY

FAN,

PUMP,

LIGHTS,

ECONOMIZER,

OTHER DEVICE

INSERT 1000 OHM RESISTOR.

24 VAC POWER TERMINAL BLOCK.

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE

TERMINAL BLOCK.

RELAY

120

Fig. 7. T775B Wiring for time-based fan, pump or other

device.

63-7147—3 12

Page 13

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

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.

MS75xx

SPRING RETURN DIRECT COUPLED ACTUATOR (DCA)

WIRING

STRIP

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

MOD 1

B R W

(HOT)

– +

S V

T T

Fig. 8. T775M Wiring - Damper Modulation

(2-10 Vdc shown).

ML7425

SPRING RETURN

ACTUATOR

(HOT)

VALV E

WIRING

STRIP

–

MOD 1

–

SENSOR A

T775M

C S V

T T

M24881A

SENSOR A

T775M

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

M28042

Fig. 9. T775M Wiring - Valve Modulation (2-10 Vdc shown).

13 63-7147—3

Page 14

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Hot Water Reset – T775R

Application Description

The T775R is controlling the boiler water temperature with two stages (relays), based on outside temperature using a reset curve and an offset for relay 2.

Sensor Designation

This device application requires two sensors.

• Sensor A is sensing hot water discharge temperature of the boiler.

• Sensor B is sensing outside air temperature

Operation

In this example, when the outside temperature reaches 70° F (21° C), the desired water temperature of the boiler is 160° F (71° C). Likewise, when the outside temperature drops to 20° F (-7° C), the hot water temperature needs to be 210° F (99° C). See Fig. 10.

°F

SP MAX A1

(BOILER MAX)

SP MIN A2

(BOILER MIN)

220

210

200

190

180

170

160

150

140

(OUTSD MIN)

OFFSET -10°F

RESET B1

RELAY 2

SETPOINT

30 40 50 60

SENSOR B

Fig. 10. Hot Water Reset Curve.

RELAY 1 SETPOINT

RESET B2

(OUTSD MAX)

°F80

M24871

PROGRAM

RELAY 2 OFFSET

-10

ENTER

SETPOINT

OFFSET

FOR

RELAY 2

M24321

PROGRAM RELAY 2

PROGRAM

RELAY 2

OFFSET

DIFFRNTL HEAT/COOL SETBACK EXIT

Fig. 11. Program Mode - Relay 2 Offset.

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.

IMPORTANT

By programming the boiler setpoint at 210° F (99° C) the T775 has established 210° F (99° C) as the highest operating point that will be allowed when the outside temperature falls below 20° F (-7° C). As the outside temperature increases above 20° F (-7° C), the boiler will be reset downward per the reset ratio until it reaches the minimum setpoint, 160° F.

Assuming an outside temperature of 20° F (-7° C), Fig. 12 describes the actions of relays 1 and 2 to control the boiler temperature. As the boiler temperature falls below 210° F (99° C), relay 1 activates (relay 1 Differential is 20° F (-7° C), so relay closes at 190° F (88° C). If relay 1 cannot raise the boiler temperature and the boiler temperature continues to fall to 180° F °, relay 2 activates (relay 2 Differential is 20° F (-7° C) 180° to 200° F (82° to 93° C) When the boiler is able to reach 200° F (93° C), then relay 2 deactivates and relay 1 remains active until the temperature reaches 210° F (99° C).

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: —MOD 1 —# Relays = 2 — Relay 1 — Relay 2

Relay 1: Control to the discharge water temperature Program for: (Refer to the reset curve in Fig. 10.)

— Boiler Max = 210° F (99° C) — Outside Min = 20° F (-7° C) — Boiler Min = 160° F (71° C) — Outside Max = 70° F (21° C) — Differential = 20° F (-7° C) —Sensor A —Heat

Relay 2: Control to the discharge water temperature Program for:

— Setpoint Offset = -10° F (-12° C) (See Fig. 11) —Sensor A —Heat

63-7147—3 14

→ Reset = YES-BOILER

→ Reset = YES-BOILER → Reset = YES-BOILER

BOILER DISCHARGE

TEMPERATURE

RELAY 1 OFF

210°

RELAY 1

DIFFERENTIAL

RANGE

DIFFERENTIAL

RELAY 2

RANGE

200°

190°

180°

RELAY 2 OFF

RELAY 1 ON

RELAY 2 ON

M24877

Fig. 12. Relay Actions.

NOTE: The Hot Water Reset application continues on the

next page.

Page 15

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Hot Water Reset (continued)

Wiring

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

(HOT WATER DISCHARGE)

(HOT)

SENSOR A

SENSOR B

(OUTSIDE AI R)

HOT

WATER

BOILER #1

HOT

WATER

BOILER #2

RELAY

T T

T775R

120

COM

120 VAC

240

RELAY

Device Checkout

The T775 performance can be checked out to determine if proper operation exists.

For example, when the outside air temperature is at 50° F (10° C), the boiler setpoint temperature should be 180° F (82° C). See Fig. 14. Use the alternate Home screens to check that the effective setpoint is adjusting correctly based on the outside air temperature (sensor B).

NOTE: The alternate Home screens do not show live

updates of the sensor temperature. They show the temperature only at the moment the button is pressed.

1. From the Home screen, use the $ button to verify

the setpoint temperature for each output.

2. Then, press the HOME button to view the actual outside air temperature (sensor B).

BOILER SETPOINT

TEMPERATURE

210°

190°

180°

170°

160

Fig. 14. Boiler Discharge Temperature Setpoint vs.

Outside Temperature.

OUTSIDE AIR

TEMPERATURE

20°

30°200°

40°

50°

60°

70°

M24873

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE

TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

Fig. 13. T775R WirIng - Hot Water Reset.

M24872

15 63-7147—3

Page 16

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Chilled Water Reset – T775R

Application Description

The T775R is controlling the chiller water temperature, based on outside temperature using a reset curve.

Multiple stages can also be controlled by using an offset from the main setpoint for the subsequent relay outputs. When enabling multiple stages for reset, each stage can have its own programmable offset from relay 1 (stage 1).

Sensor Designation

This device application requires two sensors.

• Sensor A is sensing the water temperature of the chiller.

• Sensor B is sensing outside air temperature.

Operation

In this example, when the outside temperature reaches 90° F (32° C), the desired water temperature of the chiller is 45° F (7° C). Likewise, when the outside temperature drops to 70° F (21° C), the chilled water temperature needs to be 60° F (16° C).

°F

SP MAX A1

SENSOR A

(CHILLER)

Relay 1: Control to the chilled water temperature Program for: (Refer to the reset curve in Fig. 15.)

— Setpoint Max A1 (Chiller) = 60° F (16° C) — Reset B1 (Outside Min) = 70° F (21° C) — Setpoint Min A2 (Chiller) = 45° F (7° C) — Reset B2 (Outside Max) = 90° F (32° C) — Differential = 10° F (-12° C) —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.

IMPORTANT

By programming the Chiller setpoint at 45° F (7° C) the T775 has established 45° F (7° C) as the lowest operating control point that will be allowed during reset with the above conditions satisfied.

Wiring

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

SENSOR B

(OUTSIDE AI R)

SENSOR A (CHILLED WATER)

T T

T775R

SP MIN A2

65 95

RESET B1

(OUTSD MIN)

75 80 85

RESET B2

(OUTSD MAX)

SENSOR B (OUTSIDE AIR)

Fig. 15. Chiller Reset Curve.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: —MOD 1 —# Relays = 1 — Relay 1

→ Reset = YES-OTHER

°F

M24874

COM

120 VAC

240

M24875

(HOT)

RELAY

CHILLER

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE

TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

RELAY

120

Fig. 16. T775R Wiring - Chilled Water Reset.

NOTE: The Chilled Water Reset application continues on

the next page.

63-7147—3 16

Page 17

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Chilled Water Reset (continued)

Device Checkout

The T775 performance can be checked out to determine if proper operation exists.

For example, when the outside air temperature is at 80° F (27° C), the chiller water temperature should be 52.5° F (11° C). See Fig. 17. Use the alternate Home screens to check that the effective setpoint is adjusting correctly based on the outside air temperature (sensor B).

NOTE: The alternate Home screens do not show live

updates of the sensor temperature. They show the temperature only at the moment the button is pressed.

1. From the Home screen, use the $ button to verify the setpoint temperature for each output.

2. Then, press the HOME button to view the actual outside air temperature (sensor B).

CHILLED WATER

SETPOINT TEMPERATURE

60°

56.25°

52.5°

48.75°

45°

OUTSIDE AIR

TEMPERATURE

70°

75°

80°

85°

90°

M24876

Fig. 17. Chiller Setpoint vs. Outside Temperature.

17 63-7147—3

Page 18

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Multi-Stage Boiler Control (No Reset) – T775P

Application Description

The T775P is providing multistage boiler control based on the boiler's discharge water temperature. The T775P uses the fourth output relay to energize the primary pump.

Sensor Designation

This device application requires two sensors.

• Sensor A is sensing discharge water and is used to control 3 boiler stages.

• Sensor C is sensing the return water.

NOTE: Control can be to either sensor A or C.

Operation

In this example, as the heating load increases, additional stages of heat will cycle ON as the boiler water temperature decreases. The T775P will stage three boilers to provide sufficient heating. (See Fig. 18.) The primary circulating pump energizes whenever any stage is energized.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: — # Stages = 3 (T775 assigns pump to Relay 4) — Options

Seconds = 0 to 3,600 (default is 0)

— Options

Temperature = 30 to 100° F (-1 to 38° C)

— STG4/Pump: (Relay 4 controls the pump output)

Enable = YES Exercise = YES or NO Prepurge = -300 to 300 seconds (default is 0) Postpurge = 0 to 300 seconds (default is 0)

NOTES:

1. A positive Prepurge time causes the pump to

2. The Postpurge time causes the pump to run for

Return to the Setup menu, and select Alarms: — High Alarm = YES — High Limit = 220° F (93° C)

NOTE: This model has Equal Runtime options, which can be

Stages 1-3: Control to the discharge water temperature Program for:

— Setpoint = 200° F (93° C) — Throttling Range = 18° F (-8° C) —Sensor A —Heat

IMPORTANT

→ On Delay and Off Delay:

→ WWSD = YES or NO

energize before the first stage energizes. A negative time causes the pump to energize after the first stage energizes.

the set number of seconds after the last stage de-energizes.

configured with the Lead Lag output option in Setup.

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.

Refer to the staging diagram in Fig. 18 for individual stage behavior.

STAGES

STAGE 3 ON

HYST.

STAGE 2 ON

STAGE 1 ON

STAGE 1

-33%

206°F 200°F 194°F 188°F

STAGE ENERGIZES STAGE DE-ENERGIZES

DISCHARGE WATER TEMPERATURE

STAGE 2

0% 33% 67%

THROTTLING RANGE (18°F)

STAGE 3

M24867

Fig. 18. Boiler Control Staging Behavior (when the

effective setpoint = 200° F).

Wiring

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

SENSOR A (DISCHARGE WATER)

SENSOR C

(RETURN WATER)

ALARM

RELAY

(HOT)

DIGITAL OUTPUT

PUMP

BOILER #1

BOILER #2

BOILER #3

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE

TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

Fig. 19. T775P Wiring - Multi-Stage Boiler Control

(No Reset).

T775P

T T

120

COM

120 VAC

240

M24866

RELAY

63-7147—3 18

Page 19

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Multi-Stage Boiler Control (Reset) – T775P

Application Description

The T775P is providing multistage boiler control based on the boiler's discharge water temperature. The T775P uses the fourth output relay to energize the primary pump.

Any number of stages from 1 to 12 can be configured (T775P and T775L models). The throttling range is divided equally among the stages.

Sensor Designation

This device application requires three sensors.

• Sensor A is sensing discharge water and is used to control 3 boiler stages.

• Sensor B is sensing outside temperature and is used for reset.

• Sensor C is sensing the return water temperature.

NOTE: Control can be to either sensor A or C.

Operation

In this 3-stage example, as the heating load increases, additional stages of heat will cycle ON as the boiler water temperature decreases. The T775P will stage three boilers to provide sufficient heating. See Fig. 20 for staging behavior.

The primary circulating pump energizes whenever any stage is energized.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: — # Stages = 3 (T775 assigns pump to Relay 4) — Options — Options

Seconds = 0 to 3,600 (default is 0)

— Options

Temperature = 30 to 100° F (-1 to 38° C)

— STG4/Pump: (Relay 4 controls the pump output)

Enable = YES Exercise = YES or NO Prepurge = -300 to 300 seconds (default is 0)

Postpurge = 0 to 300 seconds (default is 0) Return to the Setup menu, and select Alarms: — High Alarm = YES — High Limit = 220° F (104° C)

Stages 1-3: Control to the discharge water temperature Program for: (Refer to the reset curve in Fig. 21.)

— Boiler Max = 210° F (99° C) — Outside Min = 20° F (-7° C) — Boiler Min = 160° F (71° C) — Outside Max = 70° F (21° C) — Throttling Range = 18° F (-8° C) — Sensor A — Heat — Setback = -10° F (-12° C) (Optional)

→ Reset = YES-BOILER → On Delay and Off Delay:

→ WWSD = YES or NO

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.

STAGES

STAGE 3 ON

HYST.

STAGE 2 ON

STAGE 1 ON

STAGE 1

-33% 0% 33% 67%

206°F 200°F 194°F 188°F

STAGE ENERGIZES STAGE DE-ENERGIZES

DISCHARGE WATER TEMPERATURE

STAGE 2

THROTTLING RANGE (18°F)

STAGE 3

M28043

Fig. 20. Boiler Control Staging Behavior (when effective

setpoint = 200° F).

°F

220

SP MAX A1

(BOILER MAX)

SP MIN A2

(BOILER MIN)

210

200

E N

190

S O

180

R A

170

160

150

140

(OUTSD MIN)

RESET B1

SETBACK

OFFSET

-10°F

(OPTIONAL)

30 40 50 60

SENSOR B

RESET B2

(OUTSD MAX)

°F80

M24869

Fig. 21. Reset Curve with Optional Setback Offset.

Wiring

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring. See Fig. 22 on page 20.

NOTE: The Multi-Stage Boiler Control (Reset) application

continues on the next page.

See Notes in “Programming Example” on page 18 for an

explanation of Prepurge and Postpurge times

19 63-7147—3

Page 20

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Multi-Stage Boiler Control (Reset) (continued)

SENSOR B (OUTSIDE AIR)

SENSOR C

(RETURN WATER)

RELAY

(HOT)

PUMP

BOILER #1

BOILER #2

BOILER #3

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

RELAY

Fig. 22. T775P Wiring - Multi-Stage Boiler Control

with Reset.

SENSOR A (DISCHARGE WATER)

T T

T775P

T T

RELAY

120

COM

120 VAC

240

M24868

Multi-Stage Chiller Control (No Reset) – T775P

Application Description

The T775P is providing multistage cooling control based on the chiller’s discharge water temperature. The T775P uses the fourth output relay to energize the primary pump.

Any number of stages from 1 to 12 can be configured (T775P and T775L models). The throttling range is divided equally among the stages.

Sensor Designation

This device application requires three sensors.

• Sensor A is sensing chiller discharge water and is used to control 3 chiller stages.

• Sensor B is sensing outside temperature and is used to control relay 4, the pump output.

• Sensor C is sensing the chiller return water temperature.

NOTE: Control can be to either sensor A or C.

Operation

In this 3-stage example, as the cooling load increases, additional stages of cooling will cycle ON as the chiller water temperature increases. The T775P will stage three chillers to provide sufficient cooling. See Fig. 23 for staging behavior.

The primary circulating pump energizes whenever any stage is energized.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: — # Stages = 3 (T775 assigns pump to Relay 4) — Options

Seconds = 0 to 3,600 (default is 0)

— STG4/Pump: (Relay 4 controls the pump output)

Enable = YES Exercise = YES or NO Prepurge = -300 to 300 seconds (default is 0)

Postpurge = 0 to 300 seconds (default is 0) Return to the Setup menu, and select Alarms: — Low Alarm = YES — Low Limit = 54° F (12° C)

Stages 1-3: Control to the discharge water temperature Program for:

— Setpoint = 72° F (22° C) — Throttling Range = 12° F (-11° C) —Sensor A —Cool

IMPORTANT

See Notes in “Programming Example” on page 18 for an

explanation of Prepurge and Postpurge times.

STAGE 1 ON

Fig. 23. Chiller Control Staging Behavior (when the

→ On Delay and Off Delay:

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.

STAGES

STAGE 3 ON

HYST.

STAGE 2 ON

STAGE 2

STAGE 1

-33% 68°F 72°F 76°F 80°F

STAGE ENERGIZES STAGE DE-ENERGIZES

CHILLER DISCHARGE WATER TEMPERATURE

0% 33% 67%

THROTTLING RANGE (12°F)

effective setpoint = 72° F).

STAGE 3

M28009

63-7147—3 20

Page 21

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Wiring

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

SENSOR B (OUTSIDE AIR)

SENSOR C

(CHILLER

RETURN WATER)

RELAY

(HOT)

PUMP

CHILLER 1

CHILLER 2

CHILLER 3

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

RELAY

Fig. 24. T775P Wiring - Multi-Stage Chiller Control

(No Reset).

SENSOR A (CHILL ER DISC HARGE WATER)

T T

RELAY

T775P

RELAY

120

COM

120 VAC

240

M28008

4 Stage with Pump Output and Reset – T775P using a T775S Expansion Module

Application Description

The T775P is providing multistage boiler control based on the boiler's discharge water temperature. Four stages and a dedicated pump output are used in this example. The T775P uses the eighth output relay to energize the primary pump.

NOTE: The pump output is always the last relay output. In

this application example, four relays are used for staged boiler control. A T775S expansion module is added to provide the additional relay for the pump. However, the pump must be the last relay, so it is configured as relay 8 on the T775S module.

Any number of stages from 1 to 12 can be configured (T775P and T775L models). The throttling range is divided equally among the stages.

Sensor Designation

This device application requires three sensors.

• Sensor A is sensing discharge water and controls 4 stages.

• Sensor B is sensing outside temperature and is used for reset.

• Sensor C is sensing the return water temperature.

NOTE: Control can be to either sensor A or C.

Operation

As the heating load increases additional stages of heat will cycle ON as the boiler water temperature decreases. In this example, the T775P provides four stage control when the effective setpoint is 200° F (93° C). (See Fig. 25.) The primary circulating pump energizes whenever any stage is energized.

NOTE: The pump output must always be the last relay on

the controller or expansion module (relay 4, 8, or 12).

NOTE: For applications with 3 stages or less with a pump

output, an additional expansion module is not needed.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: — # Stages = 4 (T775 assigns pump to Relay 8) —Options

21 63-7147—3

→ Reset = YES-BOILER

Page 22

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

— STG8/Pump: (Relay 8 controls the pump output)

Enable = YES Exercise = YES or NO Prepurge = -300 to 300 seconds (default is 0) Postpurge = 0 to 300 seconds (default is 0)

Stages 1-4: Control to the discharge water temperature Program for: (Refer to the reset curve in Fig. 26.)

— Boiler Max = 210° F (99° C) — Outside Min = 20° F (-7° C) — Boiler Min = 160° F (71° C) — Outside Max = 70° F (21° C) — Throttling Range= 20° F (-7° C) —Sensor A —Heat

See Notes in “Programming Example” on page 18 for an explanation of Prepurge and Postpurge times.

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.

IMPORTANT

By programming the boiler setpoint at 210° F (-99° C) the T775 has established 210° F (-99° C) as the highest operating point that will be allowed when the temperature falls below 20° F (-7° C). As temperature increases above 20° F (-7° C), the boiler will be reset downward per the reset ratio until it reaches the minimum setpoint of 160° F (-99° C), at 70° F (21° C) and above outdoor temperature.

STAGES

STAGE 4 ON

50%

STAGE 4

75%0% 25%

M28010

STAGE 3 ON

STAGE 2 ON

STAGE 1 ON

HYST.

STAGE 2

STAGE 1

-25%

205°F 185°F200°F 195°F 190°F

THROTTLING RANGE (20°F)

STAGE ENERGIZES STAGE DE-ENERGIZES

DISCHARGE WATER TEMPERATURE

STAGE 3

Fig. 25. Staging Behavior (when the effective setpoint =

200° F (93° C))

°F

220

SP MAX A1

(BOILER MAX)

SP MIN A2

(BOILER MIN)

210

200

190

S O

180

R A

170

160

150

140

(OUTSD MIN)

RESET B1

30 40 50 60

SENSOR B

(OUTSD MAX)

RESET B2

°F80

M24878

Fig. 26. Reset Curve.

NOTE: The 4 Stage with Pump Output and Reset application

continues on the next page.

63-7147—3 22

Page 23

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

4 Stage with Pump Output and Reset (continued)

T T

(HOT)

–

STAGE

COM NO

STAGE

NO COM

RELAY

Wiring

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

SENSOR B

SENSOR A

SENSOR C

T T

T775P T775S

–

RELAY

PUMP

RELAY

(HOT)

RELAY

COM

120

COM

240

120 VAC

COM

RELAY

120

COM

120 VAC

240

T775 BUS TERMINALS PROVIDE WIRING CONNECTIONS TO/FROM T775P/L AND T775S.

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

Fig. 27. T775P Wiring - 4 Stage with Pump Output and Reset.

Device Checkout

The T775 performance can be checked out to determine if proper operation exists.

For example, when the outside air temperature is at 50° F (10° C), the boiler temperature should be 180° F (22° C). See Fig. 28. Use the alternate Home screen to check that the effective setpoint is adjusting correctly based on the outside air temperature (sensor B).

NOTE: The alternate Home screen does not show live

updates of the sensor temperature. They show the temperature only at the moment the button is pressed.

1. From the Home screen, use the $ button to verify

the setpoint temperature for each output.

2. Then, press the HOME button to view the actual outside air temperature (sensor B).

M24556

BOILER DISCHARGE

SETPOINT TEMPERATURE

210°

OUTSIDE AIR

TEMPERATURE

20°

30°200°

190°

180°

170°

160

40°

50°

60°

70°

M24880

Fig. 28. Boiler Discharge Temperature vs. Outside

Temperature.

23 63-7147—3

Page 24

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

3 Stage Reciprocating Chiller – T775L

Application Description

The T775L is controlling the return water in a reciprocating chiller with fast-dump freeze protection, low temperature cutoff, and optional low pressure cutoff.

Sensor Designation

This device application requires two sensors.

• Sensor A is sensing return water and controlling three stages of cooling.

• Sensor B is sensing discharge water and is controlling relay 4 for freeze protection.

Operation

Return water is one indication of the cooling load in the water loop. For example, the higher the return water temperature the higher the apparent load and more stages of refrigeration or cooling would be required. If a large load is quickly dropped from the loop, or for some reason water flow through the chiller is reduced, discharge water temperature may drop rapidly to freezing conditions. In this example, Sensor B in the discharge water will prevent damage to the system by fast- dumping all cooling stages upon close-to-freezing conditions.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: —# Relays = 3 — # Loops = 1 — Options

— Loop 1 — Loop 1

Loop 1: Chiller cooling Program for:

— Setpoint = 62° F (17° C) — Throttling Range = 12° F (-11° C) —Sensor A —Cool

Relay 4: Low temperature cutoff for freeze protection Program for:

— Setpoint = 40° F (4° C) — Differential = 4° F (-16° C) —Sensor B —Heat

→ DI Options = Disable

(acts as low pressure cutoff)

→ # Relays = 3 → Reset = NO

SENSOR A

(RETURN WATER)

SENSOR B

(DISCHARGE

WATER)

DIGITAL INPUT

(LOW PRESSURE

CUTOFF)

L1 (HOT)

COOL #1

COOL #2

COOL #3

12POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

RELAY

T T

T775L

RELAY

120

RELAY

240

COM

Fig. 29. T775L Wiring - Reciprocating Chiller.

STAGES

STAGE 3 ON

STAGE 2 ON

STAGE 1 ON

HYST.

STAGE 2

STAGE 1

-33% 58°F 62°F 66°F 70°F

STAGE ENERGIZES STAGE DE-ENERGIZES

0% 33% 67%

THROTTLING RANGE (12°F)

STAGE 3

120 VAC

COM

M25514

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

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring.

63-7147—3 24

CHILLER DISCHARGE WATER TEMPERATURE

M13895

Fig. 30. Chiller Control Staging Behavior (when the

effective setpoint = 62° F (17° C)).

Page 25

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

4 Stage Heat and 6 Stage Cool – T775L

Application Description

The T775L is providing control for four boilers based on the boiler's discharge water temperature and providing multistage cooling control.

NOTE: The T775L (with up to two expansion modules) can

control any number of heating and cooling stages up to a maximum of 12 stages.

Sensor Designation

This device application requires two sensors.

• Sensor A is sensing boiler discharge water temperature for staged heating control.

• Sensor B is used for cooling control.

Operation

In this example, as the heating load increases, additional stages of heat will cycle ON as the temperature decreases at sensor A. The T775L will use four stages to provide sufficient heating. The six cooling stages are controlled by sensor B.

NOTES:

1. The Interstage ON and OFF delay is an option for both the heating and the cooling loops.

2. Because only 10 of the 12 relays are being used, the remaining two relays can be used as independent controls, each with its own setpoint and throttling range.

Loop 2: Control to sensor B Program for:

— Setpoint = 72° F (22° C) — Throttling Range = 12° F (-11° C) — Sensor B — Cool — Relays = 5-10

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

All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring. See Fig. 31 on page 26.

NOTE: The 4 Stage Heat and 6 Stage Cool application

continues on the next page.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: — # Relays = 10 (4 heat and 6 cool) — # Loops = 2 — Loop 1 — Loop 1 — Loop 2 → # Relays = 6 — Loop 2

NOTES:

1. The Integral setup parameter can be left at the

2. The On Delay and Off Delay setup parameters

Loop 1: Control to sensor A Program for:

— Setpoint = 200° F (93° C) — Throttling Range = 20° F (-7° C) — Sensor A — Heat — Relays = 1-4

Reset can be used for the T775L. However, keep in mind

that only one reset curve can be programmed. This means that you can offset from the curve, but you cannot create a second reset curve. Normally reset curves can be used for Heat or Cool, not both.

→ # Relays = 4 → Reset = NO

→ Reset = NO

factory default setting or adjusted as needed for each loop.

can be adjusted according to the application.

25 63-7147—3

Page 26

63-7147—3 26

4 Stage Heat and 6 Stage Cool (continued)

SENSOR B

SENSOR A

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

(HOT)

24 VAC

HEAT

COM NO

NO COM

T T

T775L FIRST

–

RELAY

COM

120

COM

240

COM NO

NO COM

RELAY

COOL 4

T T

T775S

–

+ –

RELAY

COOL 3

RELAY

120

COM

240

COM

COOL

120 VAC

RELAY

COM

RELAY

T T

SECOND T775S

120 VAC

RELAY

120

COM

240

COM

COOL

COOL 5

T775 BUS TERMINALS PROVIDE WIRING CONNECTIONS TO/FROM T775L AND T775S.

USE PIGTAIL CONNECTI ONS TO WIR E THE T7 75 BUS TERM INALS O N THE FIRST T 775S

SECOND T775S MUST HAVE A JUM PER INSTALLED AS SHOW N AT THE JUMPER TERMI NAL.

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

Fig. 31. T775L Wiring - 4 Stage Heat and 6 Stage Cool using 2 Loops.

M27239

Page 27

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Pressure with a Variable Frequency Drive (VFD) – T775U

Application Description

In this application the T775U is controlling duct pressure with a fan controlled by an NXS or NXL Variable Frequency Drive. A P7640 pressure sensor, located in the duct, is providing sensor input to the T775U to control the fan speed. The VFD is looking for a 4-20 mA PID control signal from the T775U and will drive the fan with a signal directly proportional to this T775U output.

For additional information about the NXS or NXL variable frequency drives (VFD), refer to the VFD Reference Guide, form 63-9469.

Sensor Designation

This device application requires one sensor.

• Sensor A is sensing pressure at the duct (reference is at the room).

Operation

In this example, as the sensed pressure decreases, the fan speed increases. Assume we have a 0-10 Vdc sensor output for 0-5 inches water column. First, set up a Sensor type of 0-10 Vdc into the T775U sensor A settings, and a minimum (0) and maximum (5) inches water column for the sensor range.

Also set up a 4-20 mA PID modulating output loop (MOD 1) at the T775U with a setpoint of 2.5 inches and a throttling range of 2 inches, and a reverse acting action. At a sensed pressure of 2.5 inches (in other word, at setpoint), MOD 1 will output close to 50% or about 12 mA. At 1.5 inches water column, the output will be 100% or about 20 mA, and at 3.5 inches water column, the output will be 0% or about 4 mA. Keep in mind these values are valid for proportional control and will differ in a PID loop where integral (usually desired) and derivative (less often required) are set to non-zero values.

Integral and derivative time may need to be adjusted, along with the throttling range.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode, and then select: — Sensors

Type = 0-10V Units = IN WC Minimum Value = 0.0 Maximum Value = 5.0

—Outputs

Type = 4-20 mA

Program MOD 1 for:

— Setpoint = 2.5 — Throttling Range = 2 inches w.c. — Action = REV ACT

→ Sensor A:

→ MOD 1 (Modulating Output):

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.

IMPORTANT

After programming the VFD, be sure to check the following:

1. Verify that the VFD value P7.1.1.2 (AI2 mode) is set to 2 (4-20 mA).

2. Verify that the jumper block X2 on the Expansion board A is in Current Input Mode (a jumper is across the A terminals, and a jumper is across the B terminals).

3. Verify that the P7640A pressure sensor is set to: Output = Voltage Range = 0 to 5 inches w.c. Mode = Unidirectional (default) Volt = 10 Vdc

Wiring

See Fig. 32 for wiring connections for the T775U, the pressure sensor, and the Variable Frequency Drive.

VFD BOARD A

SHIELDED CABLE

MOD 1

–

SENSOR A

V T

Fig. 32. T775U Wiring - Pressure with a VFD (loop

powered wiring).

NOTES:

1. SHIELDED CABLE MUST BE CONNECTED TO A SEPARATE EARTH GROUND. HOWEVER, DO NOT GROUND SHIELDED CABLE AT SENSOR END.

2. TO MINIMIZE NOISE PICKUP, MAKE SENSOR CONNECTION FROM SHIELDED CABLE AS CLOSE AS POSSIBLE TO SENSOR BODY.

CSV

OUT

P7640A

COM

PRESSURE SENSOR; 0-10 VDC CONNECTION

M28006

POWER

27 63-7147—3

Page 28

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Carbon Dioxide (CO2) Sensing – T775U

Application Description

In this application, the T775U is controlling an outside air damper based on CO CO

levels.

Sensor Designation

This device application requires one sensor.

• Sensor A is sensing CO

Operation

In this example, as the CO2 level increases a damper is opened to allow fresh air to enter the facility.

Many CO Because ppm units are not available on the T775, there are

sensors are used with a 0-2,000 ppm output range.

two choices.

• You could set up for percent (%), and enter 0 and 100 for the minimum and maximum sensor inputs. Then use Table 2 to convert the percent to ppm levels.

• Alternatively, you can set the units for Pa (Pascals, a unit of pressure not normally used in the United States) and enter 0 for a minimum and 2,000 for a maximum. The controller will simply convert the input signal (0-10 Vdc or 4-20 mA) into the correct ppm value and display it on the screen. Units will still show Pa, but this may be easier than converting using the table.

Programming Example

Program in Setup:

Press and hold the MENU button for 5 seconds to enter Setup mode, and then select: —Sensors

Type = 0-10V Units = % Minimum Value = 0.0 Maximum Value = 100.0

sensing input, to maintain reasonable

in parts per million

→ Sensor A:

Table 2. CO

CO2 PPM

PPM to % conversion.

Percentage Display

00%

200 10%

400 20%

600 30%

800 40%

1,000 50%

1,200 60%

1,400 70%

1,600 80%

1,800 90%

2,000 100%

Alternatively you can choose Pascals (Pa) as the units and enter the minimum and maximum PPM levels for the sensor (0 to 2,000 for example). The controller will show the correct CO

level but displays Pascals (Pa) instead of PPM.

Wiring

See Fig. 33 for wiring connections for the T775U and the CO2 sensor.

SHIELDED CABLE

– +

SENSOR A

NOTES:

1. SHIELDED CABLE MUST BE CONNECTED TO A SEPARATE EARTH GROUND. HOWEVER, DO NOT GROUND SHIELDED CABLE AT SENSOR END.

2. TO MINIMIZE NOISE PICKUP, MAKE SENSOR CONNECTION FROM SHIELDED CABLE AS CLOSE AS POSSIBLE TO SENSOR BODY.

NOTE: Sensor A is a 0-10 Vdc CO

range of 0 to 2,000 PPM

sensor (C7232) with a

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.

The T775U displays the sensor output as a percentage (%). Use Table 2 to convert from % to PPM.

63-7147—3 28

–

ANALOG

OUT

–

M24882

24 V

C7232 CO2 SENSOR

(0-10 VDC CONNECTION)

RED

BLACK

L1 (HOT)

USE SEPARATE 24 V TRANFORMER TO POWER THE C7232 CO2 SENSOR.

PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

Fig. 33. T775U Wiring - Carbon Dioxide sensing control.

Page 29

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775 APPLICATION REPLACEMENT EXAMPLES

This section describes how a T775 Series 2000 Electronic Stand-Alone Controller is wired and programmed to replace various older generation Honeywell devices.

T675A COMPRESSOR LOCKOUT

W973A

COOL 2

T775M2030 Replacement for W973A Logic Panel

This replacement example illustrates how a T775M2030 is configured to replace a two-stage Heat and two-stage Cool W973A Logic Panel.

• Fig. 34 illustrates the wiring connections for the W973A Logic Panel.

• Fig. 35 and Table 3 on page 31 illustrate the wiring and configuration of the T775M2030 controller.

T675A HIGH LIMIT

1HEAT2

1COOL2

(HOT)

HEAT 1

HEAT 2

(HOT)

C7046

DISCHARGE

SENSOR

FAN RELAY

FAN START

RELAY

M954 MOTOR

COOL 1

(HEATING)

(OPTIONAL) PLENUM

FAN CONTROL

MOD-HEAT MOD-COOL

SENSOR STAT 24V ECONO

C +20 NH

T7067 THERMOSTAT

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

W973A SHOWN. W973B HAS 3 HEAT AND 3 COOL STAGES.

USE MODULATING AND/OR OUTPUT RELAYS DEPENDING ON APPLICATION.

USE FAN START RELAY AND/OR PLENUM FAN CONTROL FOR AUTOMATIC FAN OPERATION IN

HEATING MODE.

RHBHWH

15243

WCBCRC

YBWRTT15243T1 R

M954 MOTOR

H205 OUTSIDE

AIR CHANGEOVER

(HOT)

(COOLING)

MIN. POSITION POT ENTIOMETER

M955 MOTOR (ECONOMIZER)

BWR

31 2

(HOT)

Fig. 34. W973A Wiring Connections (Pre-existing Control).

NOTE: The T775M2030 Replacement for W973A Logic Panel continues on the next page.

29 63-7147—3

M24562

Page 30

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775M2030 Replacement for W973A Logic Panel (continued)

HONEYWELL ELECTRONIC SERIES 90 MODUTROL MOTOR

OPTIONAL

SPDT

CHANGEOVER

(H705)

MINIMUM

POSITION

POTENTIOMETER

L1 (HOT)

(Q20 9)

HONEYWELL

ELECTRONIC

SERIES 90

MODUTROL

MOTOR

OTHER MOTORS SUCH AS 4-20 MA, 0-10 VDC, AND 2-10 VDC, MAY BE USED.

TO VERIFY OUTPUT, TEST OPEN CIRCUIT VOLTAGE BETWEEN THE MOD 1 TERMINALS W AND R.

- MINIMUM (DRIVE CLOSED) SIGNAL LESS THAN 0.17 VDC

- MAXIMUM (DRIVE OPEN) SIGNAL IS GREATER THAN 1.7 VDC

USE SEPARATE TRANSFORMER FOR T775M WHEN USING 24 VAC.

A 250 OHM R ESISTOR PROVIDES 40% AU THORITY WHEN U SING A 150 OH M MINIM UM POSI TION POTE NTIOMETER.

INSERT 340 OHM RESISTOR (INCLUDED) ACROSS TERMINALS R AND W.

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

W R B

COOLING

T1 T2 B WR

T675A COMPRESSOR

LOCKOUT

T675A

HIGH LIMIT

COOL 2

HEAT 1

HEAT 2

COOL 1

HEATING

POWER

OUTPUT

MOD 1

MOD 2

COM

NOTE: Fig. 35 is for wiring purposes only. A thorough review

of the existing W973A application is required in order to determine the capability of the T775 controller replacement.

–

RELAY

T T

SENSOR A (ROOM)

SENSOR B (DISCHARGE)

–

T775M2030

RELAY

COM

120

COM

120 VAC

240

M28012

BWRT1 T2

Fig. 35. T775M2030 Wiring Connections for Replacing a W973A Logic Panel.

NOTE: The T775M2030 Replacement for W973A Logic Panel continues on the next page.

63-7147—3 30

Page 31

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775M2030 Replacement for W973A Logic

In this replacement application, the T775M2030 provides the following, as described in Table 3:

Panel (continued)

Table 3. T775M2030 Replacement for W973A

Component/Function W973A Logic Panel T775M2030 Replacement

Thermostat T7067 Sensor A (Room) - C7130B1008.

Discharge Sensor C7046 Sensor B (Discharge) - C7046D1008.

Heating/Cooling Motor M954 Series 90, 4-20 mA, 0-10 Vdc, or 2-12 Vdc motor may be used.

Fan Start Fan Start Relay If a relay is available, it can be used for fan control (e.g., 1 stage Heat and 2

stage Cool using the T775M2030).

Economizer M955 With the T775M2030 there are two modulating outputs. Therefore, two of the

three functions (Heat, Cool, or Economizer) are available to be used. The example in Fig. 35 uses the Heat and Cool functions; no Economizer.

Outside Air Changeover H205 Optional – SPDT Changeover (H705).

31 63-7147—3

Page 32

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775R Replacement for W964F Aquatrol Panel with Floating Actuator

This replacement example illustrates how a T77R is configured to replace a W964F Aquatrol Panel.

• Fig. 36 illustrates the wiring connections for the W964F Aquatrol Panel.

• Fig. 37 and Table 4 on page 34 illustrate the wiring and configuration of the T775R controller.

L 54A4123ABCDN T3T3T2T276

W964F

120 V, 60 HZ POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

JUMPER BETWEEN B AND D.

TERMINALS Y, T, AND G ARE NOT USED.

T123Y BRWG

M944B

T7044A T7043A

T7043B

M28013

Fig. 36. W964F Wiring Connections (Pre-existing Control).

NOTE: The T775R Replacement for W964F Aquatrol Panel with Floating Actuator continues on the next page.

63-7147—3 32

Page 33

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775R Replacement for W964F Aquatrol Panel with Floating Actuator (continued)

OPTIONAL MOTOR CONFIGURATION

MODULATING OUTPUT (MOD 1)

T1 T2 B WR

POWER

OUTPUT

COM

–

RELAY

NOTE: Fig. 37 is for wiring purposes only. A thorough review

of the existing W964F application is required in order to determine the capability of the T775 controller replacement.

HONEYWELL ELECTRONIC SERIES 90 MODUTROL MOTOR

SENSOR A (STANDARD TE MPERATURE SENSO R)

–

C S

T T

SENSOR B (OUTDOOR SENSOR)

T T

T775R

RELAY

120

COM

240

COM

120 VAC

MOTOR

OPEN

COM

120/240 VAC LINE

OTHER MOTORS SUCH AS 4-20 MA, 0-10 VDC, AND 2-10 VDC, MAY BE USED ON THE MOD 1 OUTPUT.

TO VERIFY OUTPUT, TEST OPEN CIRCUIT VOLTAGE BETWEEN THE MOD 1 TERMINALS W AND R.

- MINIMUM (DRIVE CLOSED) SIGNAL LESS THAN 0.17 VDC

- MAXIMUM (DRIVE OPEN) SIGNAL IS GREATER THAN 1.7 VDC

USE SEPARATE TRANSFORMER FOR T775R WHEN USING 24 VAC.

INSERT 340 OHM RESISTOR (INCLUDED) ACROSS TERMINALS R AND W.

24 VAC POWER TERMINAL BLOCK.

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

RELAY 1 CLOSES TO DRIVE DEVICE OPEN. RELAY 2 CLOSES TO DRIVE DEVICE CLOSED.

MOTOR CAN BE AN M944B, M644, M6184, ML6984, ML6420, ETC.

M28014

Fig. 37. T775R Wiring Connections for Replacing a W964F Aquatrol Panel.

NOTE: The T775R Replacement for W964F Aquatrol Panel with Floating Actuator continues on the next page.

33 63-7147—3

Page 34

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775R Replacement for W964F Aquatrol Panel with Floating Actuator (continued)

In this replacement application, the T775R provides the following, as described in Table 4.

Table 4. T775R Replacement for W964F

Component/Function W964F Aquatrol T775R Replacement

Sensors T7044A or T7043A

T7043B

Reset ratio and parallel shift n/a Reset programming in the T775R provides the reset curve.

On/Off motor control Jumper terminals 1

and 2 on the W964F

Actuator motor speed n/a Use the Integral Time and Throttling Range to tune the T775R control.

Differential n/a Use the Throttling Range to tune the T775R control.

Program setback n/a The T775R provides Setback and alternate setpoint programming parameters.

Motor M944B Series 90, 4-20 mA, 0-10 Vdc, or 2-12 Vdc motor may be used.

Sensor A - Standard 1097 Ohm temperature sensor. Sensor B - Standard 1097 Ohm temperature sensor. See “Temperature Sensors” on page 3.

If the W964F provided On/Off motor control, then wire motor to a relay output on the T775R to provide On/Off control.

63-7147—3 34

Page 35

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775L Replacement for S984 Step Controller

This replacement example illustrates how a T775L using a T775S Expansion module is configured to replace a S984 Step Controller.

NOTE: This replacement section also applies to the S684

Step Controller.

SERIES 90

CONTROLLER

S400A DELAY TIMER

132

L1 (HOT) L2

WHITE

ORANGE

S984 STEP CONTROLLER

STAGE 1 STAGE 2 STAGE 3 STAGE 4 STAGE 5

Fig. 38 illustrates the wiring connections for the S984 Step Controller.

Fig. 39 and Table 5 on page 36 illustrate the wiring and configuration of the T775L controller.

2 3

1R1

ON-OFF SWITCH

L1 (HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

SWITCHES SHOWN WITH DEVICE ENERGIZED.

REFER TO SPECIFICATIONS FOR NUMBER OF SWITCHES.

AUXILIARY POTENTIOMETER ON S984J ONLY. TERMINAL LABELED “AUX.”

THIS HOOKUP IS FOR A COOLING SYSTEM. FOR A HEATING SYSTEM, REVERSE W AND B.

WHEN SHIPPED, LEADS ARE JOINED WITH A WIRE NUT. TO DELAY STAGES ON, REMOVE WIRE NUT FROM ORANGE AND WHITE LEADS AND CONNECT TO DELAY TIMER. TO DELAY STAGES OFF, REMOVE WIRE NUT FROM BLUE AND WHITE LEADS AND CONNECT TO DELAY TIMER.

REMOVE JUMPER AND CONNECT ON-OFF SWITCH HERE IF S984 MUST RETURN TO START PPOSITION DURING OFF CYCLE.

CLIP OUT JUMPER (TERMINAL 6 TO L1) AND CONNECT SEPARATE POWER SOURCE HERE IF SEPARATION OF SWITCHING STAGES

AND CONTROL OPERATION IS DESIRED.

NOT PART OF STEP CONTROLLER.

Fig. 38. S984 Wiring Connections (Pre-existing Control).

NOTE: The T775L Replacement for S984 Step Controller continues on the next page.

35 63-7147—3

M28015

Page 36

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775L Replacement for S984 Step Controller (continued)

SENSOR A (C7100D1001)

SENSOR B (SPACE OR OUTDOOR TEMPERATURE)

T T

T775L T775S

RELAY

COM

120

COM

240

RELAY

(HEAT/COOL CHANGEOVER)

(HOT)

DIGITAL INPUT

T6031 OR T675A

24 VAC

COOL 2

HEAT

COOL 1

COM NO

NO COM

T T

–

– +

RELAY

T775 BUS TERMINALS PROVIDE WIRING CONNECTIONS TO/FROM T775L AND T775S.

SETUP T HE CONT ROL (T6 031 OR T765) SO THAT IT CLOSES O N A TEMPER ATURE FALL.

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

NOTE: Fig. 39 is for wiring purposes only. A thorough review

of the existing S984 application is required in order to determine the capability of the T775 controller replacement.

–

NO COM

RELAY

120

COM

240

COM

120 VAC

COOL 4

COOL 3

M28018

Fig. 39. T775L Wiring Connections for Replacing a S984 Step Controller.

In this replacement application, the T775L provides the following, as described in Table 5:

Table 5. T775L Replacement for S684 or S984.

Component/Function S684 or S984 T775L Replacement

Sensor Series 60, Series 90,

T915, T991, T921, W902, etc. controller

Sensor A - Standard 1097 Ohm temperature sensor. Sensor B - Standard 1097 Ohm temperature sensor; (required only if reset control is used; i.e. a T991B or W902A controller was used.) See “Temperature Sensors” on page 3.

NOTE: If you are implementing two-sensor reset control, Sensor A must

always be the controlled temperature and Sensor B must always be the controlling temperature. For example, in a reset control based on outside temperature, Sensor A must be the inside sensor and Sensor B must be the outside sensor.

Delay Timer S400A Use the On Delay and Off Delay programmable parameters of the T775L.

Throttling Range n/a Set the programmable Throttling Range parameter to match the application.

Reset T991B or W902A

Reset programming in the T775L provides the reset curve.

(if used)

Loads 1 - 5 n/a Program the 5 relays into a single loop.

Auxiliary Pot. S964J only The T775L Controller with two T775S Expansion modules allows for up to

12 relay outputs.

63-7147—3 36

Page 37

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775L Replacement for W7100C Discharge Air Controller

This replacement example illustrates how a T775L using a T775S Expansion module is configured to replace a two-stage Heat and four-stage Cool W7100C Discharge Air Controller.

L1 (HOT)

M955 MOTOR

(ECONOMIZER)

DISCHARGE

C7100

SENSOR

2K2

7 6

2K2

1K1

MINIMUM POSITION

POTENTIOMETER

2K1

400 OHM (4 COOLING STAGES)

2K1

200 OHM (2 HEATING STAGES)

T7047C1025 SPACE RESET SENSOR OR

C7031G1016 OUTDOOR RESET SENSOR

Q209A

BWR

31 2

H205 OUTDOOR

AIR CHANGEOVER

S963B1037 REMOTE

POTENTIOMETER

S963B1078 OR S963B1086

HEATING REMOTE

SETPOINT POTENTIOMETER

S963B1078 OR S963B1086

COOLING REMOTE

SETPOINT POTENTIOMETER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

USE ONLY WITH SPACE RESET SENSOR. CONNECT IN SERIES AS SHOWN.

WHEN RESET NOT USED, JUMPER TERMINALS 6 AND 7.

SET HEAT AND COOL DISCHARGE SETPOINTS USING REMOTE SETPOINT POTENTIOMETERS. TURN SETPOINT KNOB ON W7100

TO MINIMUM POSITION. USE OF THE S963B1086 WILL CHANGE SETPOINT RANGE TO 40 TO 140°F.

GROUND CASE OF REMOTE SETPOINT POTENTIOMETER TO PREVENT PROBLEMS DUE TO STATIC ELECTRICITY.

WHEN CHANGEOVER TERMINALS 9 AND 10 ARE USED ON HEAT/COOL MODELS, JUMPER TERMINALS 9 AND 10 TO CHANGE OVER TO

HEATING (LOCKS OUT COOLING WHEN JUMPERED).

WHEN ECONOMIZER IS NOT USED, JUMPER TERMINALS Y AND 9 WITH THE 510 OHM, 1/4 WATT, 5 PERCENT RESISTOR CONTAINED

IN THE 4074EFV BAG ASSEMBLY.

REMOVE FACTORY INSTALLED 400 OHM RESISTOR JUMPER AND RECONNECT FOR COOLING-ONLY MODE, 4-STAGE OPERATION (CHANGE VALUE FOR OTHER NUMBER OF STAGES). FOR 2-STAGES IN HEATING MODE, USE 200 OHM, 1/8 WATT RESISTOR FOR BEST OPERATION.

Fig. 40 illustrates the wiring connections for the W7100C Discharge Air Controller.

Fig. 41 and Table 6 on page 39 illustrate the wiring and configuration of the T775L controller.

(MAKE ON TEMP. DROP)R822N RELAY (1K)

T675A HEAT/COOL SWITCH CHANGEOVER

R822N RELAY (2K)

°F

HEAT 1

HEAT 2

COOL 4

COOL 3

COOL 2

COOL 1

GND

24VAC

ECONO

CHANGE OVER

STAGES

RESET

SENSOR

REMOTE SETPOINT

SATELLITE

SETPOINT °F

RESET °F

COOL HEAT

CONTROL BAND

W7100C DISCHARGE AIR CONTROLLER

HEAT 1

HEAT 2

COOL 4

COOL 3

COOL 2

COOL 1

POWER

SUPPLY

M28017

Fig. 40. W7100C Wiring Connections (Pre-existing Control).

NOTE: The T775L Replacement for W7100C Discharge Air Controller continues on the next page.

37 63-7147—3

Page 38

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775L Replacement for W7100C Discharge Air Controller (continued)

SENSOR A (C7100D1001)

SENSOR B (SPACE OR OUTDOOR TEMPERATURE)

T T

T775L T775S

RELAY

COM

120

COM

RELAY

(HEAT/COOL CHANGEOVER)

(HOT)

DIGITAL INPUT

T6031 OR T675A

24 VAC

COOL 2

HEAT

COOL 1

Fig. 41. T775L Wiring Connections for Replacing a W7100C Discharge Air Controller.

COM NO

NO COM

T T

–

– +

RELAY

T775 BUS TERMINALS PROVIDE WIRING CONNECTIONS TO/FROM T775L AND T775S.

SETUP T HE CONT ROL (T6 031 OR T765) SO THAT IT CLOSES O N A TEMPER ATURE FALL.

POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK.

24 VAC POWER TERMINAL BLOCK.

COM

NOTE: Fig. 41 is for wiring purposes only. A thorough review

of the existing W7100C application is required in order to determine the capability of the T775 controller replacement.

–

240

NO COM

RELAY

120

COM

240

COM

120 VAC

COOL 4

COOL 3

M28018

NOTE: The T775L Replacement for W7100C Discharge Air Controller continues on the next page.

63-7147—3 38

Page 39

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

T775L Replacement for W7100C Discharge

In this replacement application, the T775L provides the following, as described in Table 6:

Air Controller (continued)

Table 6. T775L Replacement for W7100C.

W7100C

Component/Function

Sensor C7100

Economizer M955, Q209A, and H705 The T775L can not provide a direct economizer function. However, an

Heat/Cool switch changeover

Setpoint and Reset • Setpoint and Reset dial Reset programming in the T775L provides the reset curve.

Control Band Control Band dial Set the programmable Throttling Range parameter to match the

Satellite (if used) W7101A (if used) By adding up to two T775S Expansion modules, you have up to 12

Discharge Air Controller T775L Replacement

Sensor A - C7100D1001

T7047C1025 and S963B1037

T675A Connect the Digital Input terminal to an outdoor temperature control,

• S963B1078 or S963B1086 Remote setpoint adjustment is not possible.

• S963B1037 and

T7047C1025

Sensor B - Standard 1097 Ohm temperature sensor; space or outdoor

See “Temperature Sensors” on page 3.

output relay can be used to enable a separate economizer module (e.g., W7212) to provide economization.

e.g. T6031 or T675A). Program the Digital Input for Setback using -40° F (-40° C) for the T675A cooling setpoint to lock out the cooling system during cold weather.

NOTES: 1. Reset can be used for Heating or Cooling, but not both.

2. Remote adjustment of the reset curve is not possible.

application.

relays available.

39 63-7147—3

Page 40

63-7147—3 40

T775 CROSS REFERENCE

Table 7. Cross Reference.

Recommended

Temperature ° F

Old

Control Manufacturer

NOTE: For all T775 Series 2000 Controllers, the Setpoint Temperature Range is -40° to 248° F (-40° to 120° C).

A350A/B Johnson T775A2009 Johnson model: 1 SPDT temperature

A350A/B with 1 S350

A350A/B with up to 3 S350s

A350A/B with more than 3 S350s

A350P Johnson T775M2006 Johnson model: 1 mod temperature

A350P with up to 2 S350s

A350P with up to 4 S350s

A350R with up to 3 S350s

A350S with up to 4 S350s

A350P with A350R

A350P with A350R and multiple S350s

Johnson T775B2032 Johnson model: Multiple SPDT temperature

Johnson T775B2040 Johnson model: Multiple SPDT temperature

Johnson T775B2040 plus

Johnson T775M2048 Johnson model: 1 mod temperature with relays

Johnson T775M2030 Johnson model: 1 mod temperature with relays

Johnson T775R2001 or

Johnson T775R2043 Johnson model: 1 mod temperature with reset

Johnson T775R2027 or

/ Humidity

Range (RH)

Switch Action

Cap

Length

Honeywell

Electromechanical

Replacement

Johnson System 350

Table 7 lists the manufacturers in the following order:

• Johnson (System 350) — beginning on page 40

• Honeywell — beginning on page 41

• Johnson (Mechanical) — beginning on page 44

• White Rogers — beginning on page 47

• Barber Colman — beginning on page 48

• Ranco — beginning on page 49

• Tekmar — beginning on page 50

Recommended

Honeywell

Well #

(Order Sep.)

Honeywell

Electronic

Replacement

additional T775Bs as needed.

T775R2035

T775R2019

Honeywell

Well #

(Order Sep.) Comments

Johnson model: Multiple SPDT temperature

Johnson model: Mod temperature with reset and SPDTs

Johnson model: 1 mod temperature with reset and SPDTs

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 41

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electronic

Replacement

T775P2003

Honeywell

Well #

(Order Sep.) Comments

Johnson model: Sequenced relays

Old

Control Manufacturer

R353 with

Johnson T775L2007 or

S353s

Temperature ° F

/ Humidity

Range (RH)

Switch Action

Cap

Length

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

W351A Johnson T775U2006 Johnson model: 1 SPDT humidity

W351A with 1

Johnson T775U2006 Johnson model: 2 SPDT humidity

S351

W351P Johnson T775U2006 Johnson model: 1 mod humidity

P352 Johnson T775U2006 Johnson model: 1 mod pressure

P352 with up

Johnson T775U2006 Johnson model: 1 mod pressure with 2 SPDT

to 2 S352s

Any system with D350

Any system with Y350

Johnson See comment. All T775 Series 2000 controllers have an LCD

display

Johnson See comment. All T775 Series 2000 controllers can accept 24

Vac, 120/240 Vac

A319 Johnson T775A2009 Johnson model: 1 SPDT with no display

41 63-7147—3

A419 Johnson T775A2009 Johnson model: 1 SPDT with small display

Honeywell

H775A1006 Honeywell 5 to 95% RH 1-SPDT T775U2006 5001774-001

H775A1022 Honeywell 5 to 95% RH 2-SPDT T775U2006 5001774-001

H775A1048 Honeywell 5 to 95% RH 3-SPDT T775U2006 5001774-001 T775U has only 2 relays

H775A1063 Honeywell 5 to 95% RH 4-SPDT T775U2006 5001774-001 T775U has only 2 relays

H775B1005 Honeywell 5 to 95% RH 2-SPDT T775U2006 5001774-001

H775C1004 Honeywell 5 to 95% RH 4-SPDT T775U2006 5001774-001 T775U has only 2 relays

H775D1003 Honeywell 5 to 95% RH 2-SPDT T775U2006 5001774-001

H775E1002 Honeywell 5 to 95% RH 2-SPDT T775U2006 5001774-001

T4031A1008 Honeywell -30 to 50 SPST 5 ft. T775A2009 5001774-001

T4031A1016 Honeywell -30 to 50 SPST 5 ft. T775A2009 5001774-001

T4031A1073 Honeywell -30 to 90 SPST 8 ft. T775A2009 5001774-001

T4031C1004 Honeywell 40 to 180 SPST 7.5 ft. T775A2009 5001774-001

T4031C1012 Honeywell 40 to 180 SPST 5.5 ft. T775A2009 5001774-001

T4031E1009 Honeywell 40 to 180 SPST 5.5 ft. T775A2009 5001774-001

T4031F1007 Honeywell 40 to 180 SPST 5.5 ft. T775A2009 5001774-001

T4031H1003 Honeywell 35 to 45 SPST 5.5 ft. T775A2009 5001774-001

T4031J1016 Honeywell 35 to 45 SPST 5.5 ft. T775A2009 5001774-001

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 42

63-7147—3 42

Temperature ° F

Old

Control Manufacturer

/ Humidity

Range (RH)

Switch Action

Cap

Length

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

Recommended

Honeywell

Electronic

Replacement

Honeywell

Well #

(Order Sep.) Comments

T475A1016 Honeywell 70 to 140 SPST 10/30 ft. T775R2035 5001774-001 The T775R is a Reset controller

T475A1032 Honeywell 70 to 140 SPST 10/30 ft. T775R2035 5001774-001 The T775R is a Reset controller

T475A1057 Honeywell 70 to 140 SPST 10/30 ft. T775R2035 5001774-001 The T775R is a Reset controller

T6031A1011 Honeywell 15 to 90 SPDT 5 ft. T775A2009 5001774-001

T6031A1029 Honeywell -30 to 90 SPDT 8 ft. T775A2009 5001774-001

T6031A1045 Honeywell -30 to 50 SPDT 5 ft. T775A2009 5001774-001

T6031A1052 Honeywell -30 to 50 SPDT 5 ft. T775A2009 5001774-001

T6031A1060 Honeywell -30 to 90 SPDT 20 ft. T775A2009 5001774-001

T6031A1086 Honeywell -31 to 86 SPDT 8 ft. T775A2009 5001774-001

T6031A1136 Honeywell -30 to 90 SPDT 8 ft. T775A2009 5001774-001

T6031A1250 Honeywell -20 to 100 SPDT 5 ft. T775A2009 5001774-001

T6031C1009 Honeywell 40 to 180 SPDT 5.5 ft. T775A2009 5001774-001

T6031C1025 Honeywell 0 to 90 SPDT 5.5 ft. T775A2009 5001774-001

T6031C1033 Honeywell 40 to 80 SPDT 5.5 ft. T775A2009 5001774-001

T6031C1041 Honeywell 41 to 176 SPDT 5.5 ft. T775A2009 5001774-001

T6031C1058 Honeywell 100 to 240 SPDT 5 ft. stainless T775A2009 5001774-001 Use stainless well

T6031D1007 Honeywell 40 to 180 SPDT 7.5 ft. armored T775A2009 5001774-001 Protect sensor wires

T6031D1015 Honeywell 40 to 180 SPDT 5.5 ft. T775A2009 5001774-001

T6031D1031 Honeywell 0 to 70 SPDT 5.5 ft. T775A2009 5001774-001

T6031D1049 Honeywell 30 to 270 SPDT 5.5 ft. T775A2009 5001774-001

T6031E1004 Honeywell 40 to 180 SPDT 5.5 ft. T775A2009 5001774-001

T6031F1010 Honeywell 55 to 90 SPDT 5.5 ft. T775A2009 5001774-001

T6031G1000 Honeywell 0 to 90 SPDT 6 ft. T775A2009 5001774-001

T6031J1003 Honeywell 55 to 85 SPDT 5.5 ft. T775A2009 5001774-001

T6031K1001 Honeywell 15 to 75 SPDT 5.5 ft. T775A2009 5001774-001

T675A1045 Honeywell 0 to 100 SPDT 20 ft. stainless T775A2009 5001774-001 Use stainless well

T675A1102 Honeywell 160 to 260 SPDT 20 ft. T775A2009 5001774-001

T675A1136 Honeywell 0 to 100 SPDT 20 ft. T775A2009 5001774-001

T675A1243 Honeywell 167 to 257 SPDT 5 ft. T775A2009 5001774-001

T675A1425 Honeywell 55 to 175 SPDT 20 ft. T775A2009 5001774-001

T675A1441 Honeywell 55 to 175 SPDT 20 ft. stainless T775A2009 5001774-001 Use stainless well

T675A1458 Honeywell 55 to 175 SPDT 5 ft. T775A2009 5001774-001

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 43

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electronic

Replacement

Honeywell

Well #

(Order Sep.) Comments

Old

Control Manufacturer

Temperature ° F

/ Humidity

Range (RH)

Switch Action

Cap

Length

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

T675A1508 Honeywell 0 to 100 SPDT 5 ft. T775A2009 5001774-001

T675A1516 Honeywell 0 to 100 SPDT 5 ft. T775A2009 5001774-001

T675A1524 Honeywell 55 to 175 SPDT 20 ft. T775A2009 5001774-001

T675A1532 Honeywell 160 to 260 SPDT 5 ft. T775A2009 5001774-001

T675A1540 Honeywell 55 to 175 SPDT 5 ft. T775A2009 5001774-001

T675A1565 Honeywell 0 to 100 SPDT 20 ft. T775A2009 5001774-001

T675A1706 Honeywell 0 to 100 SPDT 5 ft. T775A2009

Fast response; Clip Capacitor

+ C7100D1001

T675A1722 Honeywell 55 to 175 SPDT 5 ft. T775A2009

Fast response; Clip Capacitor

+ C7100D1001

T675A1771 Honeywell 55 to 175 SPDT 5 ft. T775A2009

Fast response; Clip Capacitor

+ C7100D1001

T675A1854 Honeywell 10 to 110 SPDT 5 ft. T775A2009

43 63-7147—3

+ C7100D1001

Fast response; Clip Capacitor

T675B1002 Honeywell 30 to 50 SPDT 10 ft. T775A2009 5001774-001 Add S445A1010 to convert T775 to manual reset

T675B1010 Honeywell 30 to 50 SPDT 20 ft. T775A2009 5001774-001 Add S445A1010 to convert T775 to manual reset

T675B1028 Honeywell -20 to 50 SPDT 10 ft. T775A2009 5001774-001 Add S445A1010 to convert T775 to manual reset

T675B1032 Honeywell 80 to 220 SPDT 10 ft. T775A2009

Averaging + 50021579-001 (x3) or + C7031J2009 or + C7100D1001

T678A1015 Honeywell 0 to 100 2-SPDT 20 ft. T775B2032 5001774-001

T678A1080 Honeywell 160 to 260 2-SPDT 5 ft. T775B2032 5001774-001

T678A1163 Honeywell 5 to 95 2-SPDT 20 ft. T775B2032 5001774-001

T678A1361 Honeywell 55 to 175 2-SPDT 20 ft. T775B2032 5001774-001

T678A1437 Honeywell 0 to 100 2-SPDT 5 ft. T775B2032 5001774-001

T678A1445 Honeywell 55 to 175 2-SPDT 5 ft. T775B2032 5001774-001

T775A1001 Honeywell -20 to 240 1-SPDT T775A2009

T775A1019 Honeywell -20 to 240 2-SPDT T775B2032

T775A1027 Honeywell -20 to 240 3-SPDT T775B2040

T775A1035 Honeywell -20 to 240 4-SPDT T775B2040

T775A1068 Honeywell 55 to 175 2-SPDT T775B2040 5001774-001

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 44

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electronic

Replacement

Old

Control Manufacturer

Temperature ° F

/ Humidity

Range (RH)

Switch Action

Cap

Length

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

T775B1000 Honeywell -20 to 240 2-SPDT T775B2032

T775B1018 Honeywell -20 to 240 3-SPDT T775B2040

T775B1026 Honeywell -20 to 240 4-SPDT T775B2040

T775B1042 Honeywell -20 to 220 4-SPDT T775B2040

T775C1009 Honeywell -20 to 240 4-SPDT T775B2024

T775D1008 Honeywell -20 to 240 4-SPDT T775B2024

T775E1015 Honeywell -20 to 220 1-SPDT T775M2048

T775E1023 Honeywell -20 to 220 2-SPDT T775M2048

T775E1056 Honeywell -20 to 220 1-SPDT T775M2048

T775E1064 Honeywell -20 to 220 2-SPDT T775M2048

T775E1098 Honeywell -20 to 220 1-SPDT T775M2048

T775E1114 Honeywell -20 to 220 3-SPDT T775M2030

T775F1022 Honeywell -20 to 220 3-SPDT T775M2030

44 63-7147—3

T775F1055 Honeywell -20 to 220 3-SPDT T775M2030

T775F1089 Honeywell -20 to 220 3-SPDT T775M2030

T775G1005 Honeywell -20 to 220 3-SPDT T775M2014

T775G1013 Honeywell -20 to 220 3-SPDT T775M2014

T775G1021 Honeywell -20 to 220 3-SPDT T775M2014

T775G1039 Honeywell -20 to 220 4-SPDT T775M2014

T775J1001 Honeywell -20 to 240 1-SPDT T775R2035

T775J1019 Honeywell -20 to 240 None T775R2043

T775J1027 Honeywell -20 to 240 None T775R2043

T775J1035 Honeywell -20 to 240 None T775R2043

T775J1043 Honeywell -20 to 240 1-SPDT T775R2027

T775J1050 Honeywell -20 to 240 1-SPDT T775R2027

T775J1068 Honeywell -20 to 240 1-SPDT T775R2027

T775J1076 Honeywell -20 to 240 2-SPDT T775R2035

Johnson (Mechanical)

A19ABA-40 Johnson -30 to 100 SPST No cap T4031A1073 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19ABC-4 Johnson 50 to 130 SPDT 8 ft. T675A1425 1/2” - 112622AA T775A2009 5001774-001

3/4” - 112630AA

Honeywell

Well #

(Order Sep.) Comments

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 45

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electronic

Replacement

Honeywell

Well #

(Order Sep.) Comments

Old

Control Manufacturer

Temperature ° F

/ Humidity

Range (RH)

Switch Action

Cap

Length

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

A18ABC-24 Johnson -30 to 100 SPDT 8 ft. T6031A1136 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19ABC-36 Johnson -30 to 100 SPDT 20 ft. T6031A1060 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19ABC-37 Johnson -30 to 100 SPDT 10 ft. T6031A1060 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19ACC-4 Johnson 0 to 80 SPDT 6 ft. T6031A1136 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19AAD-5 Johnson 30 to 50 SPST 6 ft. None None T775A2009 5001774-001

A19AAD-12 Johnson -30 to 50 SPST 7 ft. T6031A1136 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19AAF-12 Johnson 25 to 225 SPDT 10 ft. None 1/2” - 123869A T775A2009 5001774-001

45 63-7147—3

3/4” - 123870A

A19AAF-20 Johnson -30 to 100 SPDT 6 ft. T6031A1136 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19AAF-21 Johnson 40 to 90 SPDT 6 ft. T6031A1136 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

A19ACA-14 Johnson -30 to 100 SPST 6 ft. L480G1044

None T775A2009 5001774-001 Add S445A1010 to convert T775 to manual reset

(20 to 60° F)

A19ACA-15 Johnson -30 to 100 SPST 10 ft. L480G1044 None T775A2009 5001774-001 Add S445A1010 to convert T775 to manual reset

A19ADB-1 Johnson 100 to 240 SPST 6 ft. L4008E1156

(110 to 290° F)

A19AAB-4 Johnson 30 to 110 SPST 6 ft. T675A1425

(55 to 175° F)

A19AAC-9 Johnson 100 to 240 SPDT 6 ft. L6008A1192 121371L

121371L

T775A2009 5001774-001 Add S445A1010 to convert T775 to manual reset

(3 in. insulation)

1/2” - 112622AA T775A2009 5001774-001

3/4” - 112630AA

T775A2009 5001774-001

(3 in. insulation)

A28AA-8 Johnson -30 to 50 2-SPDT 6 ft. T678A1437

(0 to 110° F)

1/2” - 112622AA T775B2032 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

A28AA-9 Johnson 20 to 80 2-SPDT 6 ft. T678A1437 1/2” - 112622AA T775B2032 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 46

63-7147—3 46

Temperature ° F

Old

Control Manufacturer

/ Humidity

Range (RH)

Switch Action

Cap

Length

A28AA-28 Johnson 30 to 110 2-SPDT 6 ft. T678A1478

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

Recommended

Honeywell

Electronic

Replacement

None T775B2032

(fast response)

+ 50021579-001

Honeywell

Well #

(Order Sep.) Comments

5001774-001 T678 has no weatherproof enclosure

(x3) or + C7031J2009 or + C7100D1001

A28AA-29 Johnson -30 to 110 2-SPDT 8 ft. T678A1627

(0 to 100° F)

A28AA-36 Johnson 40 to 90 2-SPDT 6 ft. T678A1437

(0 to 100° F)

A28AA-37 Johnson 60 to 140 2-SPDT 6 ft. T678A1445

(55 to 175° F)

A28AJ-4 Johnson 20 to 80 2-SPDT 6 ft. T678A1437

(0 to 100° F)

A28KA-1 Johnson 0 to 150 2-SPDT 10 ft. T678A143

(0 to 100° F) or

1/2” - 112622AA T775B2032 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

1/2” - 112622AA T775B2032 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

1/2” - 112622AA T775B2032 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

1/2” - 112622AA T775B2032 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

1/2” - 112622AA T775B2024 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

T678A1445 (55 to 175° F)

A28MA-1 Johnson 40 to 120 2-SPDT 6 ft. T678A1437

(0 to 100° F) or

1/2” - 112622AA T775B2024 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

T678A1445 (55 to 175° F)

A28MA-2 Johnson 40 to 120 2-SPDT 6 ft. T678A1437

(0 to 100° F) or

1/2” - 112622AA T775B2024 5001774-001 T678 has no weatherproof enclosure

3/4” - 112630AA

T678A1445 (55 to 175° F)

A36AHA-50 Johnson 55 to 95 4-SPDT 18 in. None 112620BB T775B2040 5001774-001

A36AHA-52 Johnson 55 to 95 4-SPDT 6 ft. None 112620BB T775B2040 5001774-001

A36AHA-58 Johnson 0 to 70 4-SPDT 15 ft. None 112620BB T775B2040 5001774-001

A36AHB-33 Johnson 0 to 70 4-SPDT 15 ft. None 112620BB T775B2040 5001774-001

A80ABA-1 Johnson -20 to 50 135 Ohm 6 ft. T991A2044 121371Q T775M2048 5001774-001 T991 has 5 ft. cap; other models available

A80ABA-2 Johnson 10 to 90 135 Ohm 6 ft. T991A1426 112622AA T775M2048 5001774-001 T991 has 5 ft. cap; other models available

A80ABA-3 Johnson 60 to 140 135 Ohm 6 ft. T991A1244 121371Q T775M2048 5001774-001 T991 has 5 ft. cap; other models available

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 47

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electronic

Replacement

Honeywell

Well #

(Order Sep.) Comments

Old

Control Manufacturer

Temperature ° F

/ Humidity

Range (RH)

Switch Action

Cap

Length

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

A80ABA-4 Johnson 120 to 200 135 Ohm 6 ft. T915C1928 112622AA T775M2048 5001774-001 T915 has 5 ft. cap; other models available

A80ABA-5 Johnson 190 to 260 135 Ohm 6 ft. T991A1061 112622AA T775M2048 5001774-001

A80ABA-22 Johnson 85 to 245 135 Ohm 6 ft. T915D1273 112622AA T775M2048 5001774-001

A80ACA-1 Johnson 60 to 140 135 Ohm 6 ft. None — T775M2048

A80ACA-7 Johnson 10 to 90 135 Ohm 6 ft. None None T775M2048

A80ADA-1 Johnson 10 to 90 135 Ohm 6 ft. None None T775M2048

A80ADA-2 Johnson 60 to 140 135 Ohm 6 ft. None T775M2048

White Rodgers

1609-90 White Rodgers -20 to 50 SPST 8 ft. T4031A1073 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

1609-101 White Rodgers -30 to 90 SPST 5 ft. T4031A1073 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

1609-102 White Rodgers -30 to 90 SPST 8 ft. T4031A1073 1/2” - 123869A T775A2009 5001774-001

47 63-7147—3

3/4” - 123870A

1609-103 White Rodgers -30 to 90 SPST 10 ft. T4031A1073

(8 ft. cap)

1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

1609-104 White Rodgers -30 to 90 SPST 20 ft. T6031A1060 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

1609-105 White Rodgers -30 to 90 SPST 5 ft. T4031A1073 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

1609-106 White Rodgers -30 to 90 SPST 5 ft. T675A1706

None T775A2009 5001774-001 Fast response element

(0 to 100° F° F)

1609-114 White Rodgers 20 to 90 SPST 8 ft. T4031A1073 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

1687-9 White Rodgers -30 to 90 SPST 8 ft. T6031A1136 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

2A38-14 White Rodgers 20 to 120 SPDT 20 ft. T675A1565

(0 to 100° F)

230-22 White Rodgers 20 to 120 SPST 8 ft. T4031A1004

(40 to 180° F)

230-22 White Rodgers 20 to 120 SPST 8 ft. T4031A1004

(40 to 180° F)

1/2” - 112622AA T775A2009 5001774-001

3/4” - 112630AA

1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 48

63-7147—3 48

Temperature ° F

Old

Control Manufacturer

/ Humidity

Range (RH)

Switch Action

Cap

Length

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

Recommended

Honeywell

Electronic

Replacement

Honeywell

Well #

(Order Sep.) Comments

241-2 White Rodgers 20 to 90 SPST 8 ft. T4031A1073 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

241-16 White Rodgers 20 to 90 SPST 8 ft. T4031A1073 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

445-6 White Rodgers 20 to 90 SPDT 5 ft. T6031A1136 1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

16A35-3 White Rodgers N/A SPST 7 ft. None None None None Ice-Trol

1050-1 White Rodgers Select T475

with correct ratio

1/2” - 121371 P T775R2035 The T775R is a Reset controller

3/4” - 121371Q

Barber Colman

TC282 Barber Colman 10 to 90 3-SPDT 6 ft. None 112620BB T775B2040

TC282-20 Barber Colman 10 to 90 3-SPDT 20 ft. None 112620BB T775B2040

TC288 Barber Colman 10 to 90 4-SPDT 6 ft. None 112620BB T775B2040

TC-4111 Barber Colman -40 to 120 SPDT 6 ft. T6031A1136

(-30 to 90° F)

TC-4111-020 Barber Colman -40 to 120 SPDT 20 ft. T6031A1136

(-30 to 90° F)

TC4112 Barber Colman 100 to 260 SPDT 6 ft. L6008A1192

1/2” - 123869A T775A2009

3/4” - 123870A

1/2” - 123869A T775A2009 5001774-001

3/4” - 123870A

121371A T775A2009

(100 to 240° F)

TC4115 Barber Colman -40 to 120 SPDT 6' T6031A1136

(-30 to 90° F)

1/2” - 123869A T775A2009

3/4” - 123870A

TC4151 Barber Colman 70 to 120 SPDT 30 ft. T475A1057 1/2” - 121371P T775R2035 5001774-001 The T775R is a Reset controller

3/4” - 121371Q

TC4152 Barber Colman 70 to 120 SPDT 30 ft. T475A1032 1/2” - 121371P T775R2035 The T775R is a Reset controller

3/4” - 121371Q

TC4211 Barber Colman -40 to 120 SPDT 6 ft. T678A1437

1/2” - 11262AA T775B2032

(0 to 100° F)

3/4” - 112630AA

TC4251 Barber Colman 70 to 120 SPDT 30 ft. None 1/2” - 112622AA T775R2035 5001774-001 The T775R is a Reset controller

3/4” - 112630AA

TC4252 Barber Colman 70 to 120 SPDT 30 ft. T678B1006 1/2” - 112622AA T775R2035 5001774-001 The T775R is a Reset controller

3/4” - 112630AA

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 49

Table 7. Cross Reference. (Continued)

Recommended

Honeywell

Electronic

Replacement

Honeywell

Well #

(Order Sep.) Comments

Old

Control Manufacturer

Temperature ° F

/ Humidity

Range (RH)

Switch Action

Cap

Length

Recommended

Honeywell

Electromechanical

Replacement

Honeywell

Well #

(Order Sep.)

TC4316 Barber Colman -40 to 120 SPDT 6 ft. None — T775B2032 5001774-001

TC4416 Barber Colman -40 to 120 2-SPDT 6 ft. None None T775B2040 5001774-001

TC5131 Barber Colman 34 to 60 SPDT 20 ft. L480B1239 None T775A2009 5001774-001

TC5141 Barber Colman 34 to 60 SPDT 20 ft. L480G1044 None T775A2009 5001774-001 Add S445A1010 to convert T775 to manual reset

Ranco

ETC-111000 Ranco T775A2009

ETC-111100 Ranco T775M2048

ETC-112000 Ranco T775M2048

ETC-112100 Ranco T775M2048

ETC-141000 Ranco T775B2016

ETC-211000 Ranco T775B2932

ETC-211100 Ranco T775M2048

ETC-212000 Ranco T775B2032

49 63-7147—3

ETC-212100 Ranco T775M2048

ETC-24100 Ranco T775B2016

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Page 50

Table 7. Cross Reference. (Continued)

Tekmar Model & T775 Cross

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Features

Adjustable Minimum Off Time

Auto Differential

Boiler Demand

Built-in Display

Combustion Air or Alarm Contact

DHW Control

Digital Input for Setback or Disable

Equal Run Time

External Input 0-10Vdc or 2-10Vdc

First On / First Off Rotation

First On/ Last OFF Rotation

Fixed Last Rotation

Fixed Lead Rotation

150

O n e S t a g e

Setpoint Control

T775A2009

152

T w o S t a g e

Setpoint Control

T775B2032

256

O n e S t a g e

Boiler Control

T7775P2003 T775R2035

260

One Stage Boiler

& DHW Control

T7775P2003 T775R2035

262

Two Stage Boiler &

DHW Control

T7775P2003

264

O u r S t a g e

Boiler & DHW

Control

T775P2003

2 6 8

N i n e S t a g e

Boiler & DHW

Control

T775P2003 & (2)

T775S2008

!! !! !! ! ! !

!! !!!

use DI use DI

use DI

!!!!!!!!!!!!!!!!

Digital Output for

Alarm

Digital OutPut for

Alarm

Digital Output for

Alarm

Both

Digital Output for

Alarm

Both

Digital Output for

Alarm

!!!!

Boiler Demand

! ! !!!!! !

! ! !!!! !

Floating Output

Integral Voltage Options Type based

Irreversible High Set Point Limit

50 63-7147—3

Lo/ Hi or Hi/ Lo staging

Modulating Outputs (T775M2048) T775R2027 T775R2027

Nema 4x Models (T775B2016)

Optional Input Sensor

Outdoor Reset

Power Supply Voltage 20 to 28 Vac 24, 120, 240 Vac 20 to 28 Vac 24, 120, 240 Vac 24Vac 24, 120, 240 Vac 24, 120, 240 Vac 120 Vac 24, 120, 240 Vac 24, 120, 240 Vac 120 Vac 24, 120, 240 Vac 115 Vac 24, 120, 240 Vac 115 Vac 24, 120, 240 Vac

Pump Exercising !

Pump Purging !

PWM Mode

Relay Rating 24 Vac 24, 120, 240 Vac 24 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 240 Vac 24, 120, 230 Vac 24, 120, 240 Vac 24, 120, 230 Vac 24, 120, 240 Vac

Relay Outputs 1 SPDT 1 SPDT 2 SPST 2 SPDT 1 SPST 4 SPDT 2 SPDT 1 SPST 4 SPDT 2 SPDT 2 SPST 4 SPDT 4 SPST

Sensor Calibration

!!!

Type based

!! !! !! ! ! !

! !!! !! !!!!! !

! ! !!!!! !

! !!!!! !

4 SPDT

!!!!!!

12 SPDT

Sensor Inputs 1122 2 323 32 53333 3

Sensor Type

Time Clock with Setback

Adjustable Interstage Delay

Warm Weather Shut Down

can be configured with up to two T775S expansion modules for a maximum of 12 stages

if staging 4 relays and a pump output add one T775S2008 expansion module

if staging 9 relays and a pump output add two T775S2008 expansion modules

10k

Ω at 77°F 1097Ω at 77°F 10kΩ at 77°F 1097Ω at 77°F 10kΩ at 77°F 1097Ω at 77°F 1097Ω at 77°F 10kΩ at 77°F 1097Ω at 77°F 1097Ω at 77°F 10kΩ at 77°F 1097Ω at 77°F 10kΩ at 77°F 1097Ω at 77°F 10kΩ at 77°F 1097Ω at 77°F

! ! ! ! ! !!!!! !

need external timer (tekmar Timer 031)

!! !! !!!!!!

Page 51

NOTES

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

51 63-7147—3

Page 52

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9

customer.honeywell.com

Honeywell T775R Application Manual And Cross Reference

TABLE OF CONTENTS

T775 APPLICATION TIPS

COMPATIBLE COMPONENTS

Humidity Sensors (T775U only)

Low Differential Pressure Sensors (T775U only)

Universal Sensors (T775U only)

Accessories

FEATURES

T775 OPERATIONS

Integral Action

Derivative Action

Differential vs. Throttling Range

Setpoint High Limit

Reset Programming (T775L, T775P, T775R, and T775U models only)

T775 APPLICATIONS

Multi-Stage Boiler Control (Reset) (continued)

4 Stage with Pump Output and Reset (continued)

4 Stage Heat and 6 Stage Cool (continued)

T775 APPLICATION REPLACEMENT EXAMPLES

T775M2030 Replacement for W973A Logic Panel

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)

T775 CROSS REFERENCE

NOTES