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. T775M2006 T775M2014 T775M2022 T775M2030 T775M2048 T775R2001 T775R2019 T775R2027 T775R2035 T775R2043 T775U2006 T775A2009 T775B2016 T775B2024 T775B2032 T775B2040 T775P2003 T775S2008 T775L2007
Feature User Interface 2x4 inch LCD display with English language display Keypad lockout 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 Number of floating (each floating output eliminates 2 relays) Runtime displayed on relays 1-4 (optional) Configurable minimum off time Expandable to 12 relays using T775S expansion modules (4 relays per expansion module) Warm weather shutdown Modulating Outputs Number of outputs Independently selectable for 0-10 Vdc, 2-10 Vdc, 4-20 mA, or Series 90 Modulating high/low limit control Digital Output Number of outputs High, low, and differential alarm Pump Output (configurable for last relay) Number of outputs Prepurge/Postpurge Pump Exercise

n/a n/a

n/a n/a

n/a 0 0

Table 1. T775 controller features by model number. (Continued) T775M2006 T775M2014 T775M2022 T775M2030 T775M2048 T775A2009 T775B2016 T775B2024 T775B2032 T775B2040 T775R2001 T775R2019 T775R2027 T775R2035 T775R2043 T775U2006 T775P2003 T775S2008 T775L2007
Feature Sensor Inputs Number of sensor inputs Number of sensors included 1097 Ohms PTC at 77 F (25 C) 0-10 Vdc or 4-20 mA input for temperature, humidity, pressure, etc. Calibration capability 10 F (6 C) or for T775U, 10% of sensor range 1 sensed temperature accuracy Sensed temperature range from -60 to 270 F (-51 to 132 C) Digital Input Number of inputs Setpoints Maximum number of setpoints Range -40 to 248 F (-40 to 120 C) Maximum high setpoint option (irreversible) Integral and Derivative Options Integral time selectable from 0 to 3,600 seconds Derivative time selectable from 0 to 3,600 seconds Staging Standard staging First on, first off Equalized runtime On delay and Off delay between stages Time Clock Scheduler DST option 2 events per day Selectable for setback, disable, or ignore to control all outputs Enclosures NEMA 1 NEMA 4X

L1 (HOT) L2 HI TEMP ALARM ADD HEAT

RELAY 3

NC C NO
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)
RELAY 1 LO TEMP ALARM SUBTRACT HEAT

NO C NC

RELAY 2
1 POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK. VAC POWER TERMINAL BLOCK.

M24863

Fig. 3. T775B wiring loop water controller.

120 COM 240

Programming Example

RELAY 4

120 VAC

Chiller T775B

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.
IMPORTANT After the desired value is selected, be sure to press the or or HOME button in order to save that value in the controllers memory.
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. 4.
SENSOR A (SUMP WATER) T T
This device application only requires one sensor. Sensor A is sensing sump water temperature.
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.
L1 (HOT) L2 SUMP DUMP VALVE SPRAY PUMP VALVE
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) Relay 4: Controlling dumping of sump at freeze condition Program for: Heat Setpoint = 50 F (10 C) Differential = 10 F (-12 C)

RELAY 1 FAN #1 FAN #2

M24864
Fig. 4. T775B wiring chiller.

SPRING RETURN WIRING STRIP VALVE ACTUATOR F

T2 L1 (HOT) L2

SENSOR A C S V T T

T1 O1 O2 TS

B R W+

M28042

Fig. 9. T775M wiring valve modulation (2-10 Vdc shown).

Hot Water Reset T775R

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.
PROGRAM RELAY 2 MENU PROGRAM RELAY 2 OFFSET DIFFRNTL HEAT/COOL SETBACK EXIT
MENU PROGRAM RELAY 2 OFFSET
This device application requires two sensors. Sensor A is sensing hot water discharge temperature of the boiler. Sensor B is sensing outside air temperature
ENTER SETPOINT OFFSET FOR RELAY 2
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.

M24321

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 controllers 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).
BOILER DISCHARGE TEMPERATURE
RELAY 2 SETPOINT OFFSET -10F

M24871

Fig. 10. Hot water reset curve.
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 Reset = YES-BOILER # Relays = 2 Relay 1 Reset = YES-BOILER Relay 2 Reset = YES-BOILER 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
RELAY 1 DIFFERENTIAL RANGE

RELAY 1 OFF

This device application requires two sensors. Sensor A is sensing the water temperature of the chiller. Sensor B is sensing outside air temperature.
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 65 SP MAX A1

SENSOR B (OUTSIDE AIR) SENSOR A (CHILLED WATER) T T T T

SENSOR A (CHILLER)

SP MIN A2
RESET B1 (OUTSD MIN) 80 85

SENSOR B (OUTSIDE AIR)

F RESET B2 (OUTSD MAX)

M24874

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 Reset = YES-OTHER # Relays = 1 Relay 1 Reset = YES-OTHER

CHILLER

M24875
Fig. 16. T775R wiring chilled water reset.
Fig. 15. Chiller reset curve.
Chilled Water Reset (continued)
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. 2. From the Home screen, use the button to verify the setpoint temperature for each output. Then, press the HOME button to view the actual outside air temperature (Sensor B).

OUTSIDE AIR TEMPERATURE

Multi-Stage Boiler Control (No Reset) T775P
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.
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.
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.
CHILLED WATER SETPOINT TEMPERATURE

60 56.25 52.5 48.75 45

M24876
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 On Delay and Off Delay: Seconds = 0 to 3,600 (default is 0) Options WWSD = YES or NO 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 energize before the first stage energizes. A negative time causes the pump to energize after the first stage energizes. The Postpurge time causes the pump to run for the set number of seconds after the last stage de-energizes.

-25% 205F

25% 195F

50% 190F

75% 185F
THROTTLING RANGE (20F) STAGE ENERGIZES STAGE DE-ENERGIZES

M28010

Fig. 25. Staging behavior (when the effective setpoint = 200 F (93 C)
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 Reset = YES-BOILER STG8/Pump: (Relay 8 controls the pump output)1 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

180 170

30 RESET B1 (OUTSD MIN) 80 F RESET B2 (OUTSD MAX)

M24878

Fig. 26. Reset curve. NOTE: The 4 stage with pump output and reset application continues below.
4 Stage with Pump Output and Reset (continued)
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. 27.
SENSOR B SENSOR A SENSOR C T T T T T T T T
L1 (HOT) L2 STAGE 4 STAGE 1 COM NO NO COM

RELAY 7

120 VAC 120 COM 240 COM NO

RELAY 8

120 VAC 120 COM 240

RELAY 1 STAGE 2 STAGE 3

RELAY 2 COM NO COM NO

RELAY 5

RELAY 6
1 T775 BUS TERMINALS PROVIDE WIRING CONNECTIONS TO/FROM T775P/L AND T775S. 2 POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK. VAC POWER TERMINAL BLOCK.

M24556

Fig. 27. T775P wiring 4 stage with pump output and reset.
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. It shows the temperature only at the moment the button is pressed. 1. 2. From the Home screen, use the button to verify the setpoint temperature for each output. Then, press the HOME button to view the actual outside air temperature (Sensor B).

BOILER DISCHARGE SETPOINT TEMPERATURE

170 160

M24880
Fig. 28. Boiler discharge temperature vs. outside temperature.
3 Stage Reciprocating Chiller T775L
The T775L is controlling the return water in a reciprocating chiller with fast-dump freeze protection, low temperature cutoff, and optional low pressure cutoff.
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. 29.
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.
SENSOR A (RETURN WATER) SENSOR B (DISCHARGE WATER)
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 fastdumping all cooling stages upon close-to-freezing conditions.
DIGITAL INPUT (LOW PRESSURE CUTOFF) 2 C RELAY 4 NC C NO COOL #1 NO C NC RELAY 1 RELAY 3 NC C NO VAC COM
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 DI Options = Disable (acts as low pressure cutoff) Loop 1 # Relays = 3 Loop 1 Reset = NO 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 IMPORTANT After the desired value is selected, be sure to press the or or HOME button in order to save that value in the controllers memory.

COOL #2 COOL #2

NO C NC RELAY 2
POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK. 24 VAC POWER TERMINAL BLOCK.

M25514

Fig. 29. T775L wiring reciprocating chiller.

-33% 58F

0% 62F

33% 66F

67% 70F

M13895

Fig. 30. Chiller control staging behavior (when the effective setpoint = 62 F (17 C)).
4 Stage Heat and 6 Stage Cool T775L
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.

RELAY 1 HEAT 2 HEAT 3

NO COM
NO RELAY 10 COOL 6 COM COOL 5

25 63-714705

RELAY 9

COOL 3 COOL 4

1 T775 BUS TERMINALS PROVIDE WIRING CONNECTIONS TO/FROM T775L AND T775S. 2 USE PIGTAIL CONNECTIONS TO WIRE THE T775 BUS TERMINALS ON THE FIRST T775S 3 SECOND T775S MUST HAVE A JUMPER INSTALLED AS SHOWN AT THE JUMPER TERMINAL. 4 POWER WITH 24 VAC OR 120/240 VAC AT THE APPROPRIATE TERMINAL BLOCK. VAC POWER TERMINAL BLOCK.

M27239

Fig. 31. T775L wiring 4 stage heat and 6 stage cool using 2 loops.
Pressure with a Variable Frequency Drive (VFD) T775U
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.
IMPORTANT After the desired value is selected, be sure to press the or or HOME button in order to save that value in the controllers 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
This device application requires one sensor. Sensor A is sensing pressure at the duct (reference is at the room).
See Fig. 32 for wiring connections for the T775U, the pressure sensor, and the Variable Frequency Drive.
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.

VFD BOARD A 5 4

SHIELDED CABLE MOD 1 B R W+ C S V T T NOTES: SENSOR A 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.
Program in Setup: Press and hold the MENU button for 5 seconds to enter Setup mode, and then select: Sensors Sensor A: Type = 0-10V Units = IN WC Minimum Value = 0.0 Maximum Value = 5.0 Outputs MOD 1 (Modulating Output): Type = 4-20 mA Program MOD 1 for: Setpoint = 2.5 Throttling Range = 2 inches w.c. Action = REV ACT
P7640A PRESSURE SENSOR; 0-10 VDC CONNECTION

M28006

Fig. 32. T775U wiring pressure with a VFD (loop powered wiring).
Carbon Dioxide (CO2) Sensing T775U
In this application, the T775U is controlling an outside air damper based on CO2 sensing input, to maintain reasonable CO2 levels.
See Fig. 33 for wiring connections for the T775U and the CO2 sensor.

SHIELDED CABLE

This device application requires one sensor. Sensor A is sensing CO2 in parts per million
In this example, as the CO2 level increases a damper is opened to allow fresh air to enter the facility. Many CO2 sensors are used with a 0-2,000 ppm output range. Parts per million (ppm) units not available on the T775U. Set the units for Ppm 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.
NOTES: SENSOR A 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.

24 V ANALOG OUT

BLACK L2
Program in Setup: Press and hold the MENU button for 5 seconds to enter Setup mode, and then select: Sensors Sensor A: Type = 0-10V Units = PPM Minimum Value = 0.0 Maximum Value = 2000 NOTE: Sensor A is a 0-10 Vdc CO2 sensor (C7232) with a range of 0 to 2,000 PPM
USE SEPARATE 24 V TRANFORMER TO POWER THE C7232 CO2 SENSOR. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

M24882

Fig. 33. T775U wiring carbon dioxide sensing control.
C7232 CO2 SENSOR (0-10 VDC CONNECTION)
Resetting Zone Air Temp Based on Outside Air Temp (2 stage cooling)
In this example, the T775L provides two stage DX cooling based on zone temperature. The T775L calculates the zone air temperature setpoint based on the actual outside air temperature using a reset curve.

SP MIN A1 60

SENSOR B (RETURN AIR TEMP) SENSOR A (DISCHARGE AIR TEMP MOD 1 B R W+ C S V T T

T2 L1 HOT) L2

SENSOR A DISCHARGE AIR TEMP
RESET B1 (RETURN MIN) 75 RESET B2 (RETURN MAX)

M31191

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 24 VAC POWER TERMINAL BLOCK.

M31192

Fig. 37. T775 wiring valve modulation

SENSOR B RETURN AIR TEMP

Fig. 36. Discharge air reset curve
Using the T775R as a Differential Temperature Controller for Solar Water Heating
The T775 can be used as a differential temperature controller for solar water heating applications. The controller regulates the circulation of water between the solar energy collector and the water storage tank. The circulation pump turns on/off based on the desired (predetermined) temperature differential between the collector and the tank.
Program in Setup: Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: Setting up the Sensor label names (Optional). SETUPSENSORSSENSOR A Select Label then highlight DISCHRG A. Press the once to get back to the SENSORS menu. Select SENSOR B. Select Label then highlight RETURN B. Choose other names if desired. Setting up RELAY 1 and RELAY 2 for reset. SETUP OUTPUTS RELAY 1 RESET = YES-OTHER (used only to set the differential curve, do not wire Relay 1) RELAY 2 RESET = YES RELAY 3 RESET = YES Press Home to exit Setup, and press Menu to enter programming. RELAY 1: The below settings for RELAY 1 are to establish the offset curve only. There will not be any electrical connections to RELAY 1. (Refer to reset curve in Fig. 38). SP MAX A1 = 248F RESET B1 = 248F SP MIN A2 = -40F RESET B2 = -40F DIFFRENTL = N/A HEAT/COOL = HEAT RELAY 2: Enter the temperature differential at which you want the pump to turn on. In our example this value is 25F. - OFFSET = 25F Next you must determine the value at which you want the pump to shut off. The differential will determine the number of degrees below the setpoint (25F differential) at which the pump will turn off. In our example this value is 20F (i.e., 5F above the storage tank temperature). - DIFFRNTL = 20F - HEAT RELAY 3: Enter the high limit temperature. The pump will shut off if the return water temperature from the storage tank reaches this temperature. In our example this value is 190F. - SETPOINT = 190F - DIFFRTL = 5F - SENSOR: SENSOR B - HEAT RELAY 4: Enter the low limit temperature. An alarm will turn on or valve will close when the return water from the storage tank reaches this temperature. In our example this value is 40F. - SETPOINT = 40F - DIFFRTL = 2F - SENSOR: SENSOR B - HEAT

SENSOR B (OUTDOOR AIR TEMP.) SENSOR A (ROOM TEMP.) T T T T
This device application requires two sensors. Sensor A is sensing room temperature. Sensor B is sensing outside air temperature.
In this example, the T775 program energizes dampers to open for free cooling or free heating. One relay energizes for cooling whenever the outside temperature (Sensor B) is at least 3F above the room temperature (Sensor A), and deenergizes when the temperature drops to 1F above the room temperature. A second relay energizes for heating when temperature is at least 3F below the room temperature and turns off when temp rises to 1F below the room temperature.
SENSOR B (OUTSIDE) F HEATING ON COOLING ON COOLING OFF ROOM TEMP

HEATING OFF

SENSOR A (ROOM) F EXAMPLE: ROOM TEMPERATURE IS 63F. COOLING TURNS ON WHEN TEMP RISES TO 66F AND TURNS OFF WHEN TEMP FALLS TO 64F. HEATING TURNS ON WHEN TEMP FALLS TO 60F AND TURNS OFF WHEN TEMP RISES TO 62F. 1 RELAY 3

M32048

Program in Setup: Press and hold the MENU button for 5 seconds to enter Setup mode. Select the Outputs menu, and then select: Setting up the Sensor label names (Optional). SETUP SENSORS SENSOR A

Fig. 40. Reset curve.

120V COM
FOR 240 VAC LOAD, CONNECT TO 240 VAC TERMINAL.

M32045

Fig. 41. T775R wiring diagram for maintaining differential temperature for both heating and cooling.
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.
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. 42 illustrates the wiring connections for the W973A Logic Panel. Fig. 43 and Table 2 on page 35 illustrate the wiring and configuration of the T775M2030 controller.

L1 (HOT) L2

T675A COMPRESSOR LOCKOUT T675A HIGH LIMIT

HEAT 1

HEAT 2

COOL COOL 1

COOL 1 MOD-HEAT

W1 B1 R1

MOD-COOL RC BC WC
M954 MOTOR (COOLING) R1 B1 W1 T1 T2

1 L1 (HOT)

L2 M955 MOTOR (ECONOMIZER) R1 T1 T2

M954 MOTOR (HEATING)

SENSOR

NOTE: Fig. 49 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.
Fig. 49. T775L wiring connections for replacing a W7100C Discharge Air Controller. NOTE: The T775L Replacement for W7100C Discharge Air Controller continues on the next page.
W7100C Discharge Air Controller C7100
In this replacement application, the T775L provides the following, as described in Table 5:
Table 5. T775L Replacement for W7100C. Component/Function Sensor T775L Replacement Sensor A - C7100D1001
T7047C1025 and S963B1037 Sensor B - Standard 1097 Ohm temperature sensor; space or outdoor See Temperature Sensors on page 3. Economizer M955, Q209A, and H705 The T775L can not provide a direct economizer function. However, an output relay can be used to enable a separate economizer module (e.g., W7212) to provide economization. Connect the Digital Input terminal to an outdoor temperature control, 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. Reset programming in the T775L provides the reset curve. NOTES: 1. Reset can be used for Heating or Cooling, but not both. 2. Remote adjustment of the reset curve is not possible. Set the programmable Throttling Range parameter to match the application. By adding up to two T775S Expansion modules, you have up to 12 relays available.
Heat/Cool switch changeover

Setpoint and Reset

Setpoint and Reset dial S963B1037 and T7047C1025
S963B1078 or S963B1086 Remote setpoint adjustment is not possible.
Control Band Satellite (if used)
Control Band dial W7101A (if used)

T775 CROSS REFERENCE

Table 6 lists the manufacturers in the following order: Johnson (System 350) beginning on page page 44. Honeywell beginning on page 45.
Johnson (Mechanical) beginning on page 49. White Rogers beginning on page 51. Barber Colman beginning on page 52. Ranco beginning on page 53. Tekmar beginning on page 54

63-714705 44

Table 6. Cross Reference. Temperature F/ Humidity Switch Manufacturer Range (RH) Action Recommended Honeywell Electromechanical Replacement Honeywell Well # (Order Sep.) Recommended Honeywell Electronic Replacement Honeywell Well # (Order Sep.)

Cap Length 5 ft. 8 ft. 5 ft. 5 ft. 20 ft. 8 ft. 8 ft. 5 ft. 5.5 ft. 5.5 ft. 5.5 ft. 5.5 ft. 5 ft. stainless 7.5 ft. armored 5.5 ft. 5.5 ft. 5.5 ft. 5.5 ft. 5.5 ft. 6 ft. 5.5 ft. 5.5 ft. 20 ft. stainless 20 ft. 20 ft. 5 ft. 20 ft. 20 ft. stainless 5 ft. 5 ft.
T6031A1011 Honeywell T6031A1029 Honeywell T6031A1045 Honeywell T6031A1052 Honeywell T6031A1060 Honeywell T6031A1086 Honeywell T6031A1136 Honeywell T6031A1250 Honeywell T6031C1009 Honeywell T6031C1025 Honeywell T6031C1033 Honeywell T6031C1041 Honeywell T6031C1058 Honeywell T6031D1007 Honeywell T6031D1015 Honeywell T6031D1031 Honeywell T6031D1049 Honeywell T6031E1004 Honeywell T6031F1010 Honeywell T6031G1000 Honeywell T6031J1003 Honeywell T6031K1001 Honeywell T675A1045 T675A1102 T675A1136 T675A1243 T675A1425 T675A1441 T675A1458 T675A1508 Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell
Table 6. Cross Reference. (Continued) Temperature F/ Humidity Switch Range (RH) Action Manufacturer Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell 0 to to to to to to to to to to to 50 -20 to to 220 SPDT SPDT SPDT SPDT SPDT SPDT SPDT SPDT SPDT SPDT SPDT SPDT SPDT Recommended Honeywell Electromechanical Replacement Honeywell Well # (Order Sep.) Recommended Honeywell Electronic Replacement T775A2009 T775A2009 T775A2009 T775A2009 T775A2009 T775A2009 + C7100D1001 T775A2009 + C7100D1001 T775A2009 + C7100D1001 T775A2009 + C7100D1001 T775A2009 T775A2009 T775A2009 T775A2009 + 50021579-001 (x3) or + C7031J2009 or + C7100D1001 T775B2032 T775B2032 T775B2032 T775B2032 T775B2032 T775B2032 T775A2009 T775B2032 T775B2040 T775B2040 T775B2040 T775B2032 5001774-001 5001774-001 5001774-001 5001774-001 5001774-001 5001774-001 5001774-001 5001774-001 5001774-001 5001774-001 Honeywell Well # (Order Sep.) 5001774-001 5001774-001 5001774-001 5001774-001 5001774-001 Fast response; Clip Capacitor Fast response; Clip Capacitor Fast response; Clip Capacitor Fast response; Clip Capacitor Add S445A1010 to convert T775 to manual reset T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Add S445A1010 to convert T775 to manual reset Add S445A1010 to convert T775 to manual reset Averaging
Old Control T675A1516 T675A1524 T675A1532 T675A1540 T675A1565 T675A1706 T675A1722 T675A1771 T675A1854 T675B1002 T675B1010 T675B1028 T675B1032

47 63-714705

Cap Length 5 ft. 20 ft. 5 ft. 5 ft. 20 ft. 5 ft. 5 ft. 5 ft. 5 ft. 10 ft. 20 ft. 10 ft. 10 ft.
T678A1015 T678A1080 T678A1163 T678A1361 T678A1437 T678A1445 T775A1001 T775A1019 T775A1027 T775A1035 T775A1068 T775B1000
Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell Honeywell

use DI

Digital Output for Alarm

Both use DI

Digital OutPut for Alarm

Boiler Demand

Type based

T775R2027 Type based

(T775M2048) (T775B2016)

54 63-714705

Modulating Outputs Nema 4x Models Optional Input Sensor Outdoor Reset Power Supply Voltage Pump Exercising Pump Purging PWM Mode Relay Rating Relay Outputs Sensor Calibration Sensor Inputs Sensor Type Time Clock with Setback Adjustable Interstage Delay Warm Weather Shut Down
1 can be configured with up to two T775S expansion modules for a maximum of 2 if staging 4 relays and a pump output add one T775S2008 expansion module
20 to 28 Vac 24, 120, 240 Vac 20 to 28 Vac 24, 120, 240 Vac 24Vac

120 Vac

24, 120, 240 Vac

115 Vac

24, 120, 240 Vac 24, 120, 240 Vac
24 Vac 1 SPDT 24, 120, 240 Vac 1 SPDT 24 Vac 2 SPST 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 2 SPDT 1 SPST 4 SPDT 2 10k at 77F need external timer (tekmar Timer 031) SPDT 1 SPST 4 SPDT 2 SPDT 2 SPST 4 SPDT 4 SPST 4 SPDT 12 SPDT 3
1 10k at 77F at 77F 2 10k at 77F

at 77F

10k at 77F need external timer (tekmar Timer 031)
at 77F 3 10k at 77F need external timer (tekmar Timer 031)

1097 at 77F 1097 at 77F

12 stages
if staging 9 relays and a pump output add two T775S2008 expansion modules
Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limite 35 Dynamic Drive Toronto, Ontario M1V 4Z9 customer.honeywell.com
U.S. Registered Trademark 2010 Honeywell International Inc. 63-714705 M.S. Rev. 10-10 Printed in U.S.A.

T7300F Series 2000 Commercial Microelectronic Conventional or Heat Pump Thermostat
INSTALLATION INSTRUCTIONS

APPLICATION

The T7300F Thermostat provides electronic control of 24 Vac commercial single zone heating, ventilating and air conditioning (HVAC) equipment. When used with a Q7300A,G,L Subbase, the thermostat is automatically configured for conventional heat/cool applications. When used with a Q7300H Subbase, the thermostat is configured for conventional or heat pump applications, depending on subbase model. When used with a Q7300C,D Subbase, the thermostat is automatically configured for heat pump applications. The T7300F is also field configurable for automatic or manual changeover between heating and cooling. The system and fan selections are made by keyboard entry. All T7300F Thermostats require a common wire to supply power.
NOTE: To remove the thermostat from the wall, first pull out at the bottom of the thermostat; then remove the top.
A. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE.
If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat.

RECYCLE NOTICE

B. PRESS LOWER EDGE OF CASE TO LATCH.

INSTALLATION

When Installing this Product
1. 2. 3. 4. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. Installer must be a trained, experienced service technician. After completing installation, use these instructions to check out the product operation.

M4824A

Fig. 1. Mount thermostat on subbase.

SETTINGS

Using Thermostat Keys
The thermostat keys are used to: set current time and day, program times and setpoints for heating and cooling, override the program temperatures, display present setting, set system and fan operation, configure Installer Setup, check Installer System Test See Fig. 2 for key information.
Mount Thermostat on Subbase
The thermostat mounts on the subbase after it is installed. 1. Engage tabs at the top of thermostat and subbase. See Fig. 1. 2. Press lower edge of case to latch.
U.S. Registered Trademark 1998 Honeywell International Inc.

All Rights Reserved

62-012 3
T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT
ENTER UNOCCUPIED PROGRAM MODE ENTER OCCUPIED PROGRAM MODE SET CURRENT DAY OR PROGRAM DAY
SET OCCUPIED TEMPERATURE SETPOINTS
SET UNOCCUPIED TEMPERATURE SETPOINTS AND SCROLLS THROUGH INSTALLER SETUP AND SYSTEM TEST
AM Mon Occupied System Heat

Fan Auto

RETURNS TO NORMAL OPERATIONS

Set Program

Run Program Occupied Start Time Unoccupied Start Time Day

Set Temperature

Occupied Temp Unoccupied Temp

Change Time/Temp

INCREASE TEMPERATURE OR TIME SETTING
SET OVERRIDE TEMPERATURE OFFSET AND ACTIVATE TEMPORARY OVERRIDE

Temporary Occupied

Set Current Day/Time

Clear Start Time

Heat/Cool Settings

Continuous Unoccupied

System
DECREASE TEMPERATURE OR TIME SETTING

ENTER HOLD MODE

SET CURRENT DAY AND TIME CLEAR PROGRAM PERIOD
SELECT SYSTEM OPERATION COPY ONE PROGRAMMED DAY TO ANOTHER DAY

SELECT FAN OPERATION

CHANGE BETWEEN HEATING AND COOLING SETPOINTS AND SCROLLS BACKWARDS THROUGH INSTALLER SETUP NUMBERS AND SYSTEM TEST

M10233A

Fig. 2. Thermostat key locations and descriptions.
Set System and Fan (select models)
The system default setting is Heat. The fan default is set so the fan operates continuously in Occupied and Recovery mode and with the heating or cooling equipment in Unoccupied mode. Use the System and Fan keys to change the settings. The system settings are: Em Heat (Q7300C,D and H heat pump models): Emergency heat relay is on continuously. Thermostat cycles highest stage of heat. Cooling system is off. Compressor is de-energized. Heat: Thermostat controls the heating. Off: Both the heating and cooling are off. Cool: Thermostat controls the cooling. Auto: Thermostat automatically changes between heating and cooling operation depending on the indoor temperature. The fan settings are: On: Fan operates continuously. Auto: Equipment controls the fan in the Unoccupied mode. The Intelligent Fan operation (Installer Setup number 17) offers three choices for the fan operation in Occupied mode: fan turns on only when there is a call for heating or cooling, fan operates continuously in Occupied mode, fan is on continuously in Occupied and recovery modes.
Table 1. Default Temperature Setpoints. Control Heating Cooling Occupied 70F (21C) 78F (25.5C) Unoccupied 55F (13C) 90F (32C)

INSTALLER SETUP

NOTE: For most applications, the thermostat factorysettings do not need to be changed. Review the factory-settings in Table 2 and if no changes are necessary, go to the Installer System Test section. The Installer Setup is used by the installer to customize the thermostat to specific systems. Installer Setup numbers are listed in Table 2. The table includes all the configuration options available. A combination of key presses are required to use the Installer Setup feature. To enter the Installer Setup, press and hold the Heat/ Cool Settings key with both the increase and decrease keys until the first number is displayed. All display segments appear for approximately three seconds before the number is displayed. See Fig. 3 and 4.
Set Program Start Time Set Day/Time Temporary Setting Enrg Sav Em Ht AM Aux Ht Room PM Comm %Humid MonTueWedThuFriSatSun Remote Heat Cool UnOccupied 12 Override In Recovery Auto Only Duct LoMedHi System Fan Wait On Auto Em Heat Off
Refer to Table 1 for the default temperature setpoints. See Owners Guide form number 63-4356 for complete instructions on changing the setpoints.
Fig. 3. LCD display of all segments.

62-01253 2

T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT Installer Setup numbers are listed in Table 2.

CAUTION

INSTALLER SETUP NUMBER DISPLAY (COLUMN 2 OF TABLE 2)
FACTORY SETTING OR OTHER CHOICE DISPLAY (COLUMN 3 OR 5 OF TABLE 2)

M10238B

Possible equipment damage. Fan must be running when system is operating or equipment damage can result. Heat pump and electric heat systems must be configured in Installer Setup 2 to prevent equipment damage caused by the system from running without the fan.
Fig. 4. Installer Setup number and setting display. To advance to the next Installer Setup number, press the Unoccupied Temp key. To return to a previous Installer Setup number, press the Heat/Cool Settings key. To change a setting, use the increase or decrease key. To exit the Installer Setup, press the Run Program key. The Installer Setup is automatically exited if no key presses are made for four minutes.
IMPORTANT Only configurable numbers are shown on the device. Example: If thermostat does not have a system key, Installer Setup Number 12 will not be displayed. Review Table 2 factory-settings and mark any desired changes in the Actual Setting column. When Installer Setup is complete, review the settings to confirm that they match the system.
Table 2. Thermostat Installer Setup Options Installer Setup Number Factory Setting (Press Unoccupied Temp Key to change) Display Description Other Choices (Press or key to change) Actual Setting

Select Not used.

Display
Description Electric heat applications where thermostat controls fan operation in heat mode.

Fan operationa. 2

Conventional 1 applications where equipment controls fan operation in heat mode. 0, 1, 2, or 3
Output stages of heating.
Depends Stages of heat. on subbase. 4 Stage 14 cph.
0No heating. 1One stage of heat. 2Two stages of heat. 3Three stages of heat. 33 cph used for hot water systems or high efficiency furnaces. 66 cph used for conventional systems. 88 cph used for conventional systems. 99 cph used for electric heat systems.

Heating cycle rate.

3, 6, 8 or 9
Stage 24 cph. Stage 34 cph. Emergency heat relay is on continuously. Highest stage of heat cycles at 4 cph (Q7300C,D,H [heat pump models only]). 0, 1, 2 or 3
Output stages of cooling.
Depends Stages of cooling. on subbase. Stage 14 cph. Stage 24 cph. Stage 34 cph.
0No cooling. 1One stage of cool. 2Two stages of cool. 3Three stages of cool. 33 cph. 44 cph.

Cooling cycle rate.

Number 2 must be set to 1 to extend fan operation. Number 22 must be set to 1 and remote sensor(s) must be installed.

62-01253

T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT Table 2. Thermostat Installer Setup Options (Continued) Installer Setup Number Factory Setting (Press Unoccupied Temp Key to change) Display Description Depends System selection. on model. 0 Temperature is displayed in F. Temperature is displayed. 12-hour clock format. Fan operates continuously in Occupied and Recovery mode. Fan operates with call for heating or cooling in Unoccupied mode. Other Choices (Press or key to change) Actual Setting

Select

Display

Description

System setting 12 adjustment (models with System key). Not used. Degree temperature display. Displaying temperature. Clock format. Intelligent Fan operation. 13 14
0, 1 or 2 0System setting key is operational. 1Auto setting is disabled. 2Auto only setting. 1 Temperature is displayed in C. Temperature is not displayed. 24-hour clock format. 0Fan only operates with calls for heating or cooling in Occupied and Unoccupied modes. 1Fan operates continuously in Occupied mode. Fan operates with calls for heating or cooling in Unoccupied mode. 1Economizer contacts.

0 or 1

Auxiliary Contact Operation. Extended fan operation in heatinga. Extended fan operation in cooling.

0Time-of-day contacts.

No extended fan 1 operation after the call for heat ends. No extended fan 1 operation after the call for cool ends. Fan setting key is operational. Remote sensing not activated. 1
Fan operation is extended 90 seconds after the call for heat ends. Fan operation is extended 90 seconds after the call for cool ends. Fan setting key is Auto only. Remote sensing activated. Temperature averaging between local sensor and remote sensor(s) activated. 1Lockout all keys on thermostat except system and fan settings, temporary setpoint, clock and day adjustments. 2Lockout all keys except set Current Day/Time, increase and decrease keys. 3Lockout all keys except temporary occupied, Set Current Day/Time (for clock, day adjustments). 1One hour override. 8Eight hour override. 12Twelve hour override.
Fan key adjust- 21 ment (models with Fan key). Remote sensing. Temperature averaging networkb. Not used. 22 23
Temperature averaging 1 disabled. No lockout. 1 or 2
Keypad lockout 25 level (keypad lockout is enabled and disabled by dip switch 1 on back of thermostat).
Duration of temporary override. Not used.

3Three hour override.

1, 8 or 12

27 thru 29

T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT Table 2. Thermostat Installer Setup Options (Continued) Installer Setup Number Factory Setting (Press Unoccupied Temp Key to change) Display Description Other Choices (Press or key to change) Actual Setting

Select Deadband.

Description Heating and cooling setpoints can be set no closer than the chosen value: 33F (1.7C) 44F (2C) 55F (2.5C) 66F (3C) 77F (3.5C) 88F (4C) 99F (4.5C) 1010F (5C) Temperature has to change more than the chosen value before the system calls for the next stage. (Example: 68F (20C) is the heat setpoint, 2F (1.1C) is the interstage setting, temperature is 65.5F (18.5C), the second stage turns on, brings the temperature to 66F (19C) and turns off. The heat pump continues to run until the setpoint is met.) No minimum on-time or 1-minute minimum on-time for heating and cooling. Minimum number of minutes (0 thru 5) the compressor will be off between calls for the compressor.

Heating and cooling 3 thru setpoints can be set no 10 closer than 2F (1.1C).
Interstage control point (Q7300C,D only).

Disabled.

1 thru 12
Minimum ontime. Minimum offtime for the compressor.
2-minute minimum on- 0 or 1 time for heating and cooling. 4-minute minimum off- 0, 1, 2, time for the 3 or 5 compressor.
Temperature range stops in heating. Temperature range stops in cooling. Not used.
Highest setpoint for heating. Lowest setpoint for cooling.
40 to 89 Temperature range (1F [0.6C] increments) for heating setpoint. 46 to 99 Temperature range (1F [0.6C] increments) for cooling setpoint.
Select Temperature display adjustment.
Description 1Display adjusts to 1F (0.6C) higher than actual room temperature. 2Display adjusts to 2F (1.1C) higher than actual room temperature. 3Display adjusts to 3F (1.7C) higher than actual room temperature. 4Display adjusts to 1F (0.6C) lower than actual room temperature. 5Display adjusts to 2F (1.1C) lower than actual room temperature. 6Display adjusts to 3F (1.7C) lower than actual room temperature. Minimum number of minutes (0 thru 5) the heating equipment will be off between calls for heat. 1Installer Setup lockout activated.
No difference in 1 thru 6 displayed temperature and actual room temperature.
Minimum offtimes in heating. Not used
44-minute minimum off-time.

0, 1, 2, 3, or 5

0No Installer Setup lockout.
Installer Setup 40 lockout (keypad lockout is enabled and disabled by dip switch 1 on back of thermostat).
Number 2 must be set to 1 to extend fan operation. Number 22 must be set to 1 and remote sensor(s) must be installed. NOTE: Sun=Sunday, Mon=Monday, Tue=Tuesday, Wed=Wednesday, Thu=Thursday, Fri=Friday, Sat=Saturday.

Set Day/Time

IMPORTANT Review the settings to confirm that they match the system. Press Run Program to exit the Installer Setup. Be sure to set the current day and time immediately.

PM Tue

Set Current Day and Time
1. Press Set Current Day/Time. NOTE: On initial power up or after an extended power loss, 1:00 pm flashes on the LCD until a key is pressed.

Continous Unoccupied

M4952C
Press increase or decrease until the current time is displayed. NOTE: Tapping the Set Current Day/Time will change the time in one hour increments.

PM Mon

Heat/Cool Settings Temporary Occupied Set Current Day/Time Clear Start Time Copy Heat/Cool Settings
Fan Continous Unoccupied System Fan

M4951C

M4953C
Press Day until the current day is displayed.

Press Run Program.

Run Program
Mon Occupied 1 System Heat

M4954B

INSTALLER SYSTEM TEST
Use the Installer System Test to check the thermostat configurations and operation. Refer to Table 3 for a list of the available system tests. Table 3. Installer System Tests. Test Number 10 to to 29 System Test Description Heating equipment can be turned on and off. Emergency heat (Q7300C,D,H [heat pump models only]) equipment can be turned on and off. Cooling equipment can be turned on and off. Fan equipment can be turned on and off. Keyboard keys test. Thermostat information including date code, software versions and subbase identification are displayed. Fig. 5. LCD Display of all segments.

30 to to 0 to 70 to 79

TEST NUMBER

M10257A

To start the system test:
Fig. 6. Test number display. NOTE: If a duct temperature sensor is installed, the duct temperature is also displayed. Refer to Table and Thermostat Information section for directions and results of the specific system tests. NOTE: Press Run Program to exit the system test. The system test times out after four minutes without any key presses.
Possible Equipment Damage. Equipment damage can result if compressor is cycled too quickly. The minimum off time for compressors is bypassed during the Installer System Test.
Press and hold the increase and decrease keys, at the same time, until 10 appears. All segments of the LCD are displayed for three seconds before 10 appears. See Fig. 5 and 6.
Table 4. Installer System Test Options Key to Press Heat/Cool Settings Heat/Cool Settings Test Number Description Enter heating equipment system test. Stage-one heat turns on. The system fan is also energized. Stage-two heat turns on. Stage-one heat and system fan remain on. Stage-three heat turns on. Stage-one and stage-two heat with the system fan are on. Stage-three heat turns off. Stage-two heat turns off. Stage-one heat and system fan turn off. Change from heating to emergency heating equipment system test. Emergency heat and system fan turn on. Highest stage heat turns on. Highest stage heat turns off. Emergency heat turns off.

Heating Equipment System Test
Emergency Heating Equipment System Test (Q7300C,D,H [heat pump models only]).
T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT Table 4. Installer System Test Options (Continued) Key to Press Heat/Cool Settings Heat/Cool Settings Heat/Cool Settings Unoccupied Temp Occupied Temp Clear Start Time Day Copy Unoccupied Start TIme System (select models) Fan (select models) Set Current Day/Time Run Program Temporary Occupied Occupied Start Time Continuous Unoccupied Test Number Description Change from heating or emergency heating to cooling equipment system test. Stage-one cooling and system fan turn on. Stage-two cool turns on. Stage-one cool and system fan remain on. Stage-three cool turns on (Q7300G only). Stage-one and stage-two cool with system fan remain on. Stage-three cool turns off. Stage-two cool turns off. Stage-one cool and system fan turn off. Change from cooling to fan equipment system test. Fan turns on. Fan turns off. Change from fan to key operation system test. Unoccupied Temp test number is displayed. Occupied Temp test number is displayed. Increase test number is displayed. Decrease test number is displayed. Clear Start Time test number is displayed. Day test number is displayed. Copy test number is displayed. Unoccupied Start Time test number is displayed. System test number is displayed. Fan test number is displayed. Set Current Day/Time test number is displayed. Run Program test number is displayed. Temporary Occupied test number is displayed. Occupied Start Time test number is displayed. Continuous Unoccupied test number is displayed.
Cooling Equipment System Test
Fan Equipment System Test
Key Operation System Test

Thermostat Information

1. Press the Heat/Cool Settings key to access the thermostat information.
Press the increase key again to display the software identification code. (Example: 02 = software ID code 2.)
Press the increase key to display the production date code. The first two large digits are the month and the third digit is the last digit of the year. (Example: 036 = March 1996.)
Press the increase key again to display the software revision number. (Example: 001 = revision number 1.)

M4932A

M10229 M4931
T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT 5. Press the increase key again to display the EEPROM identification code. (Example: 314 = EEPROM ID 314.
Set Keypad Lockout Switch
The dip switch 1 on the back of the thermostat activates the lockout features. The switch must be set to the ON position (up) to activate the lockout feature. See Fig. 7. The factory-setting is off (down). Remove the thermostat from the subbase and set the switch to ON if keypad lockout is desired. The level of lockout is determined by the Installer Setup numbers 25 and 40.

Press the increase key again to display the subbase identification code. (Example: HP = heat pump subbase.)

M4933A

M10290
Press Run Program to exit the system test mode. The system test times out after four minutes without any key presses.
1 DIP 1 IS ON BACK OF THERMOSTAT

2 DIP 2 IS NOT USED

M10235
Fig. 7. Set keypad lockout dip switch 1 on back of thermostat. NOTE: If changing Installer setup number 25 or 40, set dip switch 1 to ON prior to entering Installer setup.

TROUBLESHOOTING GUIDE

Symptom Display does not turn on. Possible Cause Thermostat is not powered. Action Check that the X terminal is connected to the system transformer. Check for 24 Vac between X and R or RH terminals. If missing 24 Vac: check if the circuit breaker is tripped; if so, reset the circuit breaker. check if the system fuse is blown; if so, replace the fuse. check if the power switch on the HVAC equipment is in the Off position; if so, set to the On position. check wiring between thermostat and HVAC equipment and replace any broken wires and tighten any loose connections. If 24 Vac is present, proceed with troubleshooting.
Temperature display is Room temperature display has Enter Installer Setup number 37 and reconfigure the display. incorrect. been reconfigured. Thermostat is configured for F or C display. Bad thermostat location. Enter Installer Setup number 14 and reconfigure the display. Relocate the thermostat.
Display shows two dashes and Installer Setup 22 is set for remote sensing and the sensor is a degree sign. missing or the circuit is open or shorted. Temperature settings will not change. (Example: Cannot set heating higher or cooling lower.) Upper or lower temperature limits were reached. The setpoint temperature range stops were configured. Keypad is locked. When a locked key is pressed, LOC flashes on the LCD. Unable to configure Installer Setup Temperature settings change from original setting. Installer Setup is locked out. Check the temperature setpoints: Heating limits are 40 to 90F (7 to 31C) Cooling limits are 45 to 99F (9 to 37C) Check Installer Setup number 34 and 35 and reconfigure the setpoint stops. Reset dip switch 1 on the back of the thermostat to enable the keypad. Enter Installer Setup number 25 or 40 and reconfigure keypad lockout level. Reset the dip switch 1 on the back of the thermostat to enable the keypad.
Heating and cooling setpoints Check that the heating setpoint is lower than the cooling set too close together. There is setpoint. a deadband in automatic Check Installer Setup number 30 to identify the deadband changeover thermostat between heating and cooling setpoints. Reconfigure if models. Example: cool desired. setpoint = 72, deadband = 3, heat setpoint = 68, changing heat setpoint to 70 automatically changes the cool setpoint to 73. Remote temperature sensing is not working. Checkout all remote sensors.

Room temperature is out of control.
T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT Symptom Heating does not turn on. Possible Cause No power to the thermostat. Action Check that the X terminal is connected to the system transformer. Check for 24 Vac between X and R or RH terminals. If missing 24 Vac: check if the circuit breaker is tripped; if so, reset the circuit breaker. check if the system fuse is blown; if so, replace the fuse. check if the system switch at the equipment is in the Off position; if so, set to the On position. check wiring between thermostat and HVAC equipment and replace any broken wires and tighten any loose connections. If 24 Vac is present, proceed with troubleshooting.
Thermostat minimum off-time Wait up to five minutes for the system to respond. is activated and wait indicator Enter Installer Setup number 38. Reconfigure minimum offis displayed. time (if required). System selection is not set to Heat. Cooling does not turn on. No power to the thermostat. Set system selection to Heat. Check that X terminal is connected to the system transformer. Check for 24 Vac between X and R or RC and Y terminals. If missing 24 Vac: check if the circuit breaker is tripped; if so, reset the circuit breaker. check if the system fuse is blown; if so, replace the fuse. check if the system switch at the equipment is in the Off position; if so, set to the On position. check wiring between thermostat and HVAC equipment and replace any broken wires and tighten any loose connections. If 24 Vac is present, proceed with troubleshooting.
Thermostat minimum off-time Wait up to five minutes for the system to respond. is activated and wait indicator Enter Installer Setup number 33. Reconfigure minimum offis displayed. time (if required). System selection is not set to Cool. System on indicator (flame=heat, snowflake=cool) is displayed, but no warm or cool air is coming from the registers. 24 Vac across all terminals. Conventional heating equipment turns on the fan when the furnace has warmed up to a setpoint. Heating or cooling equipment is not operating. Set system selection to Cool. Wait one minute after the on indicator lights and then check the registers.
Verify operation of heating or cooling equipment in self-test.

This is an arc suppression No action. voltage. Placing a load on the terminal drops the voltage to zero.
Automation and Control Solutions
Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limite 35 Dynamic Drive Scarborough, Ontario M1V 4Z9

J.S. Rev. 12-98

www.honeywell.com