Honeywell T775B2040, T775A2009, T775B2032, T775M2006, T775M2014 Installation Instructions Manual

INSTALLATION INSTRUCTIONS

62-0254-13

T775A/B/M Series 2000
Electronic Stand-Alone
Controllers

PRODUCT DESCRIPTION

The T775 electronic stand-alone controllers are the next
generation of commercial and agricultural controls
capable of remote sensing of temperature and providing
switched and/or proportional outputs to various types of
loads.

Five models have analog (modulating) outputs for
actuator and motor control, and NEMA-4 weatherproof
enclosures are available for wet environments.

IMPORTANT

Each T775A/B/M controller is an operating
control, not a limit or safety control. If used in
applications requiring safety or limit controls, a
separate safety or limit control device is
required.

Table 1. T775A/B/M Controller Configurations.

Controller

Model

a

a

All models include a digital input for use with the disable or setback option.

Description Replaces

SPDT
Relay

Outputs

Analog

(Mod)

Outputs

b

b

The modulating (analog) outputs are 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable.

Floating

Outputs

c

c

Each floating output eliminates two SPDT relays.

Sensor

Inputs

Nbr of

Sensors

Included Enclosure

T775A2009 Standard T775A1001 1 None None 1 1 NEMA 1

T775B2016 Standard N/A 2 None 1 2 1 NEMA 4X

T775B2024 Standard T775C1009 T775D1008 4 None 2 2 1 NEMA 4X

T775B2032 Standard T775A1019 T775B1000 2 None 1 2 1 NEMA 1

T775B2040 Standard T775A1027 T775A1035

T775B1018 T775B1026
T775B1042

4None2 21 NEMA 1

T775M2006 Modulating N/A None 2 N/A 2 1 NEMA 1

T775M2014 Modulating T775G1005 T775G1013

T775G1021 T775G1039

42 N/A

2

d

d

These models can support a high/low modulating limit at Sensor B for temperature control at Sensor A.

1 NEMA 4X

T775M2022 Modulating N/A 2 2 N/A

2

d

1 NEMA 4X

T775M2030 Modulating T775E1114 T775F1022

T775F1055 T775F1089

42 N/A

2

d

1 NEMA 1

T775M2048 Modulating T775E1015 T775E1023

T775E1056 T775E1064
T775E1098

22 N/A

2

d

1 NEMA 1

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

62-0254—13 2

Temperature Sensors

a

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

• 50021579-001 – Standard sensor (included with all
models except 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

Accessories

• 107324A – Bulb Holder, duct insertion

• 107408 – Heat Conductive Compound, 4 ounce

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

Product Changes

Below are the changes to T775A/B/M models starting with
Series 3 (March 2009). Series 3 can be identified by the
sideways 3 after the part number on the device label.

1. Modulating high and low limit now both function in
either the heat or the cool mode.

2. MIN ON added.

3. SYNC added.

4. Differential and throttling range increased to 300°F.

5. Setpoint and Enable options added to the DI

options.

6. HIDE option added to MOD1 and MOD2 (to hide
them on the home screen).

Controller Dimensions

Fig. 1. T775A/B/M Dimensions in inches (mm).

a

See form 62-0265 - Temperature Sensors for the T775

Series 2000 Stand-alone Controller

4 13/32 (112.1)

1/2 (12.4)

3 31/32 (101)

7 23/32

(196)

8 5/32
(207.1)

2 15/16 (74)

7/8 (22.5)

1 (25.5)

4 1/16 (103.4)

4 1/16 (103.4)

1/64 (3.8)

2 11/16 (68.1)

7/8 (22.5)

2 13/16 (71.8)

7/8 (22.5)

1 (25.5)

7/8 (22.5)

M24279

TOP

BOTTOM

LEFT RIGHT

FRONT VIEW

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

3 62-0254—13

BEFORE INSTALLATION

Review the “SPECIFICATIONS” on page 35 before
installing the controller.

When Installing This Product

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a
hazardous condition.

2. Check ratings given in instructions and on the
product to ensure the product is suitable for your
application.

3. Installer must be a trained, experienced service
technician.

4. After installation is complete, check out product
operation as provided in these instructions.

INSTALLATION AND SETUP

The following installation procedures are typically
performed in the order listed:

1. Mounting — See “MOUNTING” below.

2. Wiring — See “WIRING” on this page.

3. Checkout — See page 11.

4. Programming — See page 14.

5. Scheduling (optional) — See page 30.

Additional topics are:

• Temperature sensor calibration begins on page 11.

• Interface overview begins on page 12.

• Setup (for advanced options) begins on page 17.

• Summary menu begins on page 34.

• Troubleshooting begins on page 34.

MOUNTING

This section describes the mounting procedures for the
controller and temperature sensor(s).

Controller Mounting

IMPORTANT

Avoid mounting in areas where acid fumes or
other deteriorating vapors can attack the metal
parts of the controller circuit board, or in areas
where escaping gas or other explosive vapors
are present.

IMPORTANT

The controller must be mounted in a position that
allows clearance for wiring, servicing, and
removal.

Use a screwdriver to pry out only the knockouts that you
will use.

If mounting on DIN rail, be sure to remove the knockouts
before mounting. See “Controller Wiring” on page 5 and
Fig. 7 on page 6 for recommended knockout usage and
locations. If you do not use an opened knockout be sure
to cover it.

Mount the controller on any convenient interior location
using the four mounting holes provided on the back of the
enclosure using #6 or #8 screws (screws are not provided
and must be obtained separately). Use controller
dimensions in Fig. 1 on page 2 as a guide.

The controller may be mounted in any orientation.
However, mounting in the orientation shown in Fig. 1 on
page 2 permits proper viewing of the LCD display and use
of the keypad.

NEMA 4 Enclosure Mounting

For models with NEMA 4 enclosures, ensure that
waterproof wire/conduit fittings are used at the knockouts
for all wiring attachments. Refer to Fig. 7 on page 6 for
knockout locations.

IMPORTANT

For NEMA 4 enclosures, be sure to cover and
seal all unused open knockouts.

Temperature Sensor(s) Mounting
and Location

Temperature sensors may be located up to 1,000 feet
(304 m) from the T775A/B/M controller. Refer to Table 3
on page 11 for calibration guidelines.

The sensors may be mounted on a wall or panel for
sensing space temperature, strapped to a pipe or inserted
in an immersion well (see Fig. 2) for hot or cold water
sensing, or taped to a standard cap or bulb holder for duct
air sensing. To prevent moisture or condensation entering
the sensor through the lead wire holes, mount the sensor
with the lead wires exiting the bottom of the sensor.

NOTES:

1. The included sensor is not designed for very
wet applications. For immersion applications,
an immersion well is used.

2. Heat conductive compound must be used in
immersion wells.

3. Refer to the list of temperature sensors on
page 2 for this type of installation

.

Fig. 2. Sensor Inserted in Immersion Well.

NOTE: Multiple sensors may be parallel-series wired

to sense average temperatures in large
spaces. Refer to Fig. 3 on page 4.

WIRING

All wiring must comply with applicable electrical codes
and ordinances, or as specified on installation wiring
diagrams. Controller wiring is terminated to the screw
terminal blocks located inside the device.

The remainder of this section describes the temperature
sensor wiring and the T775A/B/M controller wiring.

SENSOR

PLACED
IN WELL

IMMERSION
WELL

1/2 NPT

USE HEAT

CONDUCTIVE

COMPOUND

M24470

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

62-0254—13 4

Wiring Connections Access

To access the wiring connections, remove the two screws
on the left side of the enclosure and gently swing open the
top. Be careful to not stress the ribbon cables that connect
the keypad and LCD display to the controller circuit board.

Temperature Sensor Wiring

CAUTION

Electrical Shock Hazard.
Can short equipment circuitry.

Make sure that metal tube of sensor does not
short against T terminals in wall-mounted case.

IMPORTANT

Poor wiring practices can cause erratic readings
from the sensor. Avoid the following to ensure
proper operation:

• Do not route the temperature sensor wiring with
building power wiring.

• Do not locate the temperature sensor wiring next
to control contactors.

• Do not locate the temperature sensor wiring near
electrical motors.

• Do not locate the temperature sensor wiring near
welding equipment.

• Make sure good mechanical connections are
made to both the sensor and the controller.

• Do not mount the sensor with the lead wire end
pointing up in an area where condensation can
occur.

If any of the above conditions cannot be avoided,
use shielded cable.

NOTE: Each T775 controller must be wired to its own

sensor(s). However, a benefit of the T775
controller’s accuracy is that there is no more
than a 2° F (-7° C) differential between any
two T775 controllers.

Multiple Parallel Sensors

Multiple sensors can be parallel-series wired to sense
average temperatures in large spaces. To maintain control
accuracy, the number of sensors to be parallel-series
wired must be of the n

2

power (for example, 4, 9, 16, etc.).
Refer to Fig. 3
.

Fig. 3. Parallel-Series Wiring of Sensors.

Temperature Sensor Wire Type and Size

Temperature sensors use standard AWG 18/2 unshielded
wire. For cable runs greater than 25 feet or where
electrical interference may be a problem, shielded cable is
recommended (See Fig. 4).

Refer to “Temperature Sensor Calibration” on page 11 for
wire size selection where cable runs are longer than 25
feet.

Fig. 4. Sensor Wiring — Showing Shielded Cable Connection to Sensor A.

TO T775 CONNECTIONS (SENSOR A) OR (SENSOR B).

SENSORS

M24471

M24472

SHIELDED
CABLE

SHIELDED
CABLE

SENSOR

SENSOR A AND SENSOR B TERMINAL WIRING IS POLARITY INSENSITIVE.

1

NOTE: SHIELDED CABLE MUST BE
CONNECTED TO AN EARTH
GROUND.
HOWEVER, DO NOT GROUND
SHIELDED CABLE AT SENSOR END.

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

T
T

T
T

SENSOR A

SENSOR B

1

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

5 62-0254—13

Controller Wiring

WARNING

Electrical Shock Hazard.
Can cause severe injury, death or property
damage.

Disconnect power supply before beginning wiring,
or making wiring connections, to prevent electrical
shock or equipment damage.

CAUTION

Do not use 24 Vac power to power any external
loads if 120 Vac or 240 Vac is used to power
the T775A/B/M controller.

CAUTION

A separate earth ground is required.

Equipment damage can result if the earth ground
is not connected. See Fig. 5 and Table 2 on
page 6.

CAUTION

Equipment Damage Hazard.
Electrostatic discharge can short equipment
circuitry.

Ensure that you are properly grounded before
handling the unit

.

Fig. 5. Earth Ground.

IMPORTANT

Poor wiring practices can cause erratic readings
from the sensor. To ensure proper operation,
ensure that good mechanical connections are
made to both the sensor and the controller.

IMPORTANT

When wiring the input power, only one source of
power can be applied to the T775A/B/M
controller (24 Vac or 120 Vac or 240 Vac).

See Fig. 7 on page 6 for locating the appropriate power
input, remote sensors input, low voltage, contact closure,
and load output terminals.

Access to the terminals can be gained through standard
conduit knockouts (A through E in Fig. 7 on page 6)
located around the perimeter of the enclosure:

• Knockouts A and B should be used only for sensor and

low-voltage wiring.

• Knockouts C, D, and E can be used to gain access to

the load relay output terminals and 120/240 Vac power
wiring.

Controller Wiring Method

Wire the sensors and outputs, then wire the power
connection.

Each terminal can accommodate the following gauges of
wire:

• Single wire – from 14 AWG to 22 AWG solid or

stranded

• Multiple wires – up to two 22 AWG stranded

For 24, 120, or 240 Vac power connections:

• Single wire – from 14 to 18 AWG solid or stranded

Prepare wiring for the terminal blocks, as follows:

1. Strip 1/2 in. (13 mm) insulation from the conductor.

2. Cut a single wire to 3/16 in. (5 mm). Insert the wire

in the required terminal location and tighten the
screw.

3. If two or more wires are being inserted into one
terminal location, twist the wires together a
minimum of three turns before inserting them to
ensure proper electrical contact.

4. Cut the twisted end of the wires to 3/16 in. (5 mm)
before inserting them into the terminal and
tightening the screw.

5. Pull on each wire in all terminals to check for good
mechanical connection

.

Fig. 6. Attaching Two or More Wires at Terminal

Blocks.

C

+

W

1

2

M24296

NO HIGH VOLTAGE. CLASS 2 WIRING ONLY.

EARTH GROUND TERMINAL MUST BE CONNECTED
TO CONDUIT CLAMP LOCALLY.

1

2

1/2 (13)

1. STRIP 1/2 IN. (13 MM)

FROM WIRES TO
BE ATTACHED AT
ONE TERMINAL.

2. TWIST WIRES

TOGETHER WITH
PLIERS (A MINIMUM
OF THREE TURNS).

3. CUT TWISTED END OF WIRES

TO 3/16 IN. (5 MM) BEFORE INSERTING
INTO TERMINAL AND TIGHTENING SCREW.
THEN PULL ON EACH WIRE IN ALL
TERMINALS TO CHECK FOR
GOOD MECHANICAL CONNECTION.

M24473

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

62-0254—13 6

Controller Wiring Details

The wiring connection terminals are shown in Fig. 7 and
are described in Table 2.

See Fig. 8 – 22 beginning on page 6 for typical T775A/B/
M wiring applications.

Fig. 7. T775A/B/M Terminal and Feature Locations.

NOTE: Refer to Table 1 on page 1 for the specific

configuration of sensors and outputs
supported by the model you are installing.

NOTE: For NEMA 4 enclosures, use waterproof fit-

tings for wiring/conduit connections at
knockouts.

WIRING APPLICATIONS
(EXAMPLES)

Fig. 8 – 22 illustrate typical controller wiring for various
applications.

NOTE: The electronic Series 90 output provided with

modulating T775 models can not drive elec­tro-mechanical slidewire devices like older
Series 3 modulating meters (prior to Series

6), V9055s, and S984s.

Fig. 8. Wiring for Two-Stage Control – 24 Vac Input

and 24 Vac Load.

Table 2. Description of Wiring

Terminal Connections.

Connection Terminal Label Description

Sensors

Sensor A T T Temperature Sensor;

polarity insensitive

Sensor B

Outputs

Relay 1
Relay 2
Relay 3
Relay 4

NO
COM
NC

120-240 Vac Relay
Output

Mod 1 + - (Vdc or mA)

W R B (Series 90)

a

Modulating Output

Mod 2

M24474

C

NO

NC

C

NO

NC

C

NC

NO

C

NC

NO

T
T

T
T

B
R

W

+

–

+

–

B
R
W

+

–

SENSOR A

SENSOR B

MOD 2

MOD 1

KNOCKOUT A

DIGITAL

INPUT

POWER
120/240 VAC

OUTPUT
RELAY 2

KNOCKOUT D

POWER

24 VAC

OUTPUT
RELAY 1

KNOCKOUT C

KNOCKOUT E

SENSORS A AND B USE THE TWO TT CONNECTIONS AND ARE
POLARITY INSENSITIVE.

FOR MOD 1 AND MOD 2 CURRENT (mA) OR VOLTAGE (VDC) OUTPUT,
USE SIGNAL (+) & COMMON (-).
FOR MOD 1 AND MOD 2 SERIES 90 OUTPUT, USE W, R, & B.

A SEPARATE EARTH GROUND IS REQUIRED FOR ANY POWER
SOURCE (24, 120, OR 240 VAC).

1

2

1

2

OUTPUT
RELAY 3

KNOCKOUT B

OUTPUT
RELAY 4

3

3

C

+

120

COM

240

Input

DI + - Digital Input (dry

contact)

24 Vac Power

24V + + 24 Vac Hot

Common C 24 Vac Common

Ground

Earth Ground

b

120 or 240 Vac Power

120 Vac 120 120 Vac Power

Common COM Common

240 Vac 240 240 Vac Power

a

For Series 90 connections, you must insert a 340 Ohm
resistor across terminals R and W. Refer to Fig. 19 on
page 9. The resistor is included with the controller.

b

A separate earth ground is required for all installations
regardless of the power source (24, 120, or 240 Vac).
Refer to Fig. 5 on page 5.

Table 2. Description of Wiring

Terminal Connections. (Continued)

Connection Terminal Label Description

L1

(HOT)

L2

24 VAC

COM

NO

COM

NO

M24475A

LOAD 2

LOAD 1

SENSOR A

C

NO

NC

C

NO

NC

T
T

C

+

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

7 62-0254—13

Fig. 9. Wiring for Four-Stage Control – 24 Vac Input

and 24 Vac Load.

Fig. 10. Wiring for Two-Stage Control with 120 Vac

(120 Vac Input and 120 Vac Load Shown).

Fig. 11. Wiring for Two-Stage Control with 240 Vac.

Fig. 12. Wiring for Four-Stage Control with 120 Vac

(120 Vac Input and 120 Vac Load Shown).

L1

(HOT)

L2

24 VAC

M24476

A

SENSOR A

C

NO

NC

C

NO

NC

C

NC

NO

C

NC

NO

T
T

COM

LOAD

4

NO

LOAD

3

LOAD

2

LOAD

1

C

+

COM

NO

COM

NO

COM

NO

SENSOR A

C

NO

NC

C

NO

NC

T
T

COM

LOAD 2

LOAD 1

NO

COM

NO

COM

120V

M33846

C

+

120

COM

240

POWER SUPPLY

L1 ( HOT )

L2

SENSOR A

C

NO

NC

C

NO

NC

T
T

COM

LOAD 2

LOAD 1

NO

COM

NO

COM

240V

M33847

C

+

120

COM

240

POWER SUPPLY

L1 ( HOT )

L2

SENSOR A

C

NO

NC

C

NO

NC

C

NC

NO

C

NC

NO

T
T

COM

120V

M33848

LOAD 1

LOAD

3

LOAD

2

COM

NO

LOAD 4

C

+

120

COM

240

COM

NO

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

62-0254—13 8

Fig. 13. Wiring for Four-Stage Control with 240 Vac.

Fig. 14. Wiring for Floating Output (Relay 1 and Relay

2 Pair Shown)

.

Fig. 15. Wiring for ML7984 Valve Actuator

(Using 4 to 20 mA Signal)

.

Fig. 16. Wiring for Digital Input (Dry Contact).

Fig. 17. Wiring for Mod Motor or Direct Coupled

Actuator with 4 to 20 mA Control Input

SENSOR A

C

NO

NC

C

NO

NC

C

NC

NO

C

NC

NO

T
T

COM

240V

M33849

LOAD 1

LOAD

3

LOAD

2

COM

NO

LOAD 4

C

+

120

COM

240

COM

NO

C

NO

NC

C

NO

NC

M31361

CLOSE RELAY TO DRIVE DEVICE CLOSED. RELAY 1 SHOWN.
(RELAYS 1 AND 3 ARE USED FOR CLOSE).

CLOSE RELAY TO DRIVE DEVICE OPEN. RELAY 2 SHOWN.
(RELAYS 2 AND 4 ARE USED FOR OPEN).

THE RELAYS MUST BE WIRED IN PAIRS WITH RELAYS 1 AND 2
BEING THE FIRST PAIR, AND RELAYS 3 AND 4 BEING THE SECOND PAIR.

1

2

1

2

120/240 VAC LINE

CLOSE

DEVICE

COM

OPEN

NO

COM

NO

COM

RELAY 1

RELAY 2

M27228A

MODULATING OUTPUT
TERMINAL (MOD 1)

B
R

W

+

–

B
R

W

+

–

T1 T2 B WR

C

POWER

ML7984 ACTUATOR

M24482

DIGITAL

INPUT

+

–

USE SEPARATE TRANSFORMER FOR T775R WHEN USING 24 VAC.

1

M24481A

MODULATING OUTPUT
TERMINAL (MOD 1)

B
R

W

+

–

B
R

W

+

–

POWER

1

T1 T2

–

+

HONEYWELL MODUTROL MOTOR WITH
4-20 mA MODULATING INPUT

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

9 62-0254—13

.

Fig. 18. Wiring for Mod Motor or Direct Coupled

Actuator with 0 to 10 Vdc Control Input

Fig. 19. Wiring for Series 90 Modutrol Motor Control

.

Fig. 20. Wiring for Changeover Relay and

Minimum Position Potentiometer Used

with Series 90 Modutrol Motors.

T1 T2 C R

POWER

USE SEPARATE TRANSFORMER FOR T775R WHEN USING 24 VAC.

1

HONEYWELL MODUTROL MOTOR WITH
VOLTAGE CONTROL INPUT

1

F

M24483A

MODULATING OUTPUT
TERMINAL (MOD 1)

B
R

W

+

–

B
R

W

+

–

M24484

A

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.

1

2

3

MODULATING
OUTPUT
TERMINAL
(MOD 1)

B
R
W

+

–

B
R
W

+

–

T1 T2 B WR

POWER

HONEYWELL ELECTRONIC
SERIES 90 MODUTROL MOTOR

1

2

3

M24485A

USE SEPAR ATE TRA NSFOR MER FOR T 775R WH EN USIN G 24 VAC.

A 250 OHM R ESISTOR PR OVIDES 40% AUTHO RITY W HEN
USING A 150 O HM MIN IMUM P OSITI ON POTEN TIOME TER.

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

1

2

MODULATING OUTPUT
TERMINAL (MOD 1)

B
R
W

+

–

B
R
W

+

–

T1 T2 B WR

POWER

2

HONEYWELL
ELECTRONIC SERIES 90
MODUTROL MOTOR

1

W R B

MINIMUM POSITION
POTENTIOMETER
(Q20 9)

SPDT CHANGEOVER
(H205 OR H705)

3

3

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

62-0254—13 10

Fig. 21. Wiring for Three Series 90 Modutrol Motors

.

Fig. 22. Wiring for Unison Control of M9184 or M9185 Modutrol IV Motor Using One Minimum Position

Potentiometer for All Motors.

POWER SU PPLY. PROVIDE DISCON NECT ME ANS A ND OVERLOA D PROTECTI ON AS REQ UIRED.

USE A 1300 O HM RESI STOR FOR T WO MOTORS , 910 OHM RESISTOR FOR THREE MOTO RS.
THE 407E AU RESIS TOR KIT, WHIC H IS SHIP PED WITH T HE M9184 A ND M9185 M OTORS,
INCLUDES BOTH RESISTORS.

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

1

2

1

2

M9184 OR M9185
MODUTROL MOTOR

W

R

B

TR

TR

W

R

B

TR

TR

W

R

B

TR

TR

M9184 OR M9185
MODUTROL MOTOR

M9184 OR M9185
MODUTROL MOTOR

L1

(HOT)

L2

M24486

MODULATING OUTPUT
TERMINAL (MOD 1)

B
R

W

+

–

B
R

W

+

–

3

3

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

UP TO SIX SIMILAR MOTORS CAN BE CONNECTED IN UNISON.

USE RESISTOR BETWEEN R AND B ON THE MOD 1 TERMINAL: 1300 OHMS FOR TWO MOTORS; 910 OHMS FOR THREE MOTORS (4074EAU KIT).

IF COMMON TRANSFORMER IS USED, ALL MOTORS MUST BE IN PHASE. CONNECT THE SAME TRANSFORMER LEAD TO T1 ON EACH MOTOR,
CONNECT THE OTHER TRANSFORMER LEAD TO T2 ON EACH MOTOR.

USE TEMPERATURE CONTROLLER SUCH AS H205 OR H705, OR T675A FOR CHANGEOVER CONTROL.

AUTHORITY OF MINIMUM POSITION POTENTIOMETER, IF USED, INCREASES WITH THE NUMBER OF MOTORS IN PARALLEL. WITH ONE MOTOR,
50% STROKE; WITH TWO MOTORS, 100% STROKE; WITH THREE MOTORS, 100% STROKE WITH 1/3 OF FULL POTENTIOMETER ROTATION.

REVERSING THE B AND W TERMINALS ON ONE OR MORE MOTORS WILL NOT AFFECT CONTROL PERFORMANCE ON THE OTHER MOTORS.
THE SYSTEM CAN BE CONFIGURED TO HAVE SOME MOTORS BE REVERSE ACTING AND OTHER MOTORS BE DIRECT ACTING.

USE SEPARATE TRANSFORMER FOR T775 WHEN POWERING FROM 24 VAC.

THE SYSTEM IS SHOWN CONNECTED FOR COOLING. FOR HEATING, REVERSE THE W AND B LEADS OF THE MODULATING OUTPUT ON THE
T775 CONTROLLER.

1

1

2

M9184 OR M9185
MODUTROL MOTOR

W

R

B

TR

TR

W

R

B

TR

TR

W

R

B

TR

TR

M9184 OR M9185
MODUTROL MOTOR

M9184 OR M9185
MODUTROL MOTOR

L1 (HOT) L2

W

R

B

MINIMUM
POSITION
POTENTIOMETER
(Q209/S963)

1

2

3

W

B

R

CHANGEOVER
CONTROLLER

6

4

2

2

2

5

7

3

9

6

4

5

7

3

8

9

M24487

MODULATING OUTPUT TERMINAL (MOD 1)

B
R
W

+

–

+

–

B
R
W

+

–

POWER

24 VAC

8

C

+

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

11 62-0254—13

CHECKOUT

Inspect all wiring connections at the controller terminals,
and verify compliance with the installation wiring
diagrams.

WARNING

Electrical Shock Hazard.
Can cause severe injury, death or property
damage.

Disconnect power supply before beginning wiring
or making wiring connections, to prevent electrical
shock or equipment damage.

If any wiring changes are required, first be sure to remove
power from the controller before starting work. Pay
particular attention to verifying the power connection (24,
120, or 240 Vac).

After the controller is installed and wired, apply power.

Power Loss

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.

Temperature Sensor Calibration

As wire length increases, resistance increases and thus
the temperature reading increases. If necessary, calibrate
the sensor input by reducing the value by the amount
shown in the Table 3. For example, a wire run with 18
gauge wire of 1,000 feet, requires a calibration offset of

-6.0° F (-21° C).

IMPORTANT

If the calibration value in the table exceeds the
controller’s calibration limits of +/-10° F (+/-6° C),
you must use a heavier gauge wire.

For example, with a wire run of 1,000 feet you
must use 20 AWG wire or heavier in order to
calibrate for wire loss within the limits of the
controller.

See “2.2.2.2. CALIBRATE (the sensor)” on page 18 for
the instructions to enter the calibration value.

Fig. 23 shows how sensor resistance varies with
temperature for a sensor having a positive temperature
coefficient (PTC) of 2.1 Ohms per degree F (3.85 Ohms
per degree C)

.

Fig. 23. Sensor Resistance vs. Temperature.

Table 3. Temperature Sensor Calibration for Resis-

tance Loss Due to Wire Length.

AWG

Rating mΩ/ft

Temperature Offset in

°F (Foot)

a

a

This is the distance from the controller to the sensor
(already accounts for round trip distance).

200 ft 500 ft 1,000 ft

14 2.5 0.46 1.14 2.28

16 4.0 0.72 1.82 3.64

18 6.4 1.16 2.90 5.82

20 10.2 1.86 4.64 9.28

22 16.1 2.92 7.32 14.64

AWG

Rating mΩ/m

Temperature Offset in

°C (Meter)

a

100 m 200 m 300 m

14 8.3 0.44 0.86 1.30

16 13.2 0.68 1.38 2.06

18 21.0 1.10 2.18 3.28

20 33.5 1.74 3.48 5.22

22 52.8 2.74 5.48 8.22

M24304

TEMPERATURE (DEGREES)

RESISTANCE (OHMS)

1403

1317

1231

114 5

1059

973

20 40 60 80 100 120 140 160 180 200 220

0 10 20 30 40 50 60 70 80 90 100

°F

°C

0-20-40

120

110

250

-40 -20 -10-30

1489

887

801

1097 ± 0.08 OHMS
AT 77°F (25°C)

POSITIVE TEMPERATURE COEFFICIENT (PTC) OF 2.1 OHMS PER °F

1

1