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T7200, T7300 and Q7300
Programmable Commercial
Thermostats and Subbases
The T7200, T7300 Thermostats and Q7300 Subbases control commerical single zone heating, ventilating and air conditioning (HVAC) equipment.
■
One model can be used for single-stage and multistage applications.
■
7-day programming—two occupied/unoccupied periods per day.
■
Individual temperature setpoints for:
—Occupied heat and cool.
—Unoccupied heat and cool.
■
Proportional plus integral control—eliminates temperature fluctuations and thermostat tampering.
■
Intelligent Recovery™—automatically optimizes start time depending on building load.
■
Intelligent Fan™—energizes fan on call for heating or cooling only. Fan can be configured to run continuously in occupied mode.
■
Automatic heat/cool changeover.
■
Universal Versaguard™ Thermostat Guard available for T7200 and T7300/Q7300.
■
Locking setpoints and schedules eliminate tampering (use keyboard security).
■
One thermostat can be used for heat pump or conventional control.
■
Optional remote sensors.
■
Configurable to vary fan and reversing valve operation.
■
Use with Q7300 to interface with C7400/W7459
Economizer System for total integration of rooftop control.
■
Convenient overrides allow temporary changes.
■
Battery backup saves program and maintains clock time during power failure.
■
Auxiliary contacts available for use with economizer.
CONTENTS
Specifications ................................................ 2
Ordering Information .................................... 2
Recycling Notice ............................................ 4
Installation .................................................... 4
Temperature Averaging Networks
(See Fig. 5-9) ........................................ 5
Set Q7300 Subbase DIP Switches ............. 6
Set Thermostat DIP Switches .................... 9
Set Thermostat Mini-Jumper .................. 11
Program the Thermostat ............................. 12
Checkout ...................................................... 13
Test Mode ................................................ 13
Operation .................................................... 15
Cross Reference .......................................... 18
Wiring Diagrams ......................................... 22
Troubleshooting .......................................... 45
J. A. • Rev. 12-95 • • ©Honeywell Inc. 1995
M3375
1
T7200/T7300/Q7300
SPECIFICATIONS • ORDERING INFORMATION
Specifications
IMPORTANT: The specifications given in this publication
do not include normal manufacturing tolerances.
Therefore, this unit may not exactly match the listed specifications. This product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.
• T7300A is a fully configurable programmable commercial thermostat to be used with a Q7300 Subbase.
• T7300B is a fully configurable programmable commercial thermostat with the 3-HOUR OVERRIDE key in the cover, to be used with a Q7300 Subbase. (See Fig. 2).
• T7300C is a fully configurable programmable commercial thermostat with limited access cover for easy programming. Cover includes Set Heat, Set Cool, Warmer,
Cooler and Occupied/Unoccupied keys. Use with Q7300
Subbase. (See Fig. 3).
T7200 AND T7300 THERMOSTATS
• T7200A is an autochangeover programmable commercial thermostat to be used with a single stage conventional heat/cool system.
• T7200B is an autochangeover programmable commercial thermostat to be used with a single stage heat pump system.
Q7300 SUBBASE
Q7300 Subbases provide features listed in Table 1.
TABLE 1—Q7300 SUBBASE FEATURES.
Model
Q7300A a,b
Q7300B
Q7300C
Q7300D
Q7300E
Q7300F
Q7300G
Q7300L
System Switch
None
Fan
Switch
None
Heat-Off-Cool-Auto Auto-On
Em. Ht.-Heat-Off-
Cool-Auto
None
Heat-Off-Cool-Auto
None
LEDs
None
Application
Conventional
Em. Ht.,
Aux. Ht.
1 stage heat pump compressor with auxiliary heat
2 stage heat pump compressor with auxiliary heat
None 1 stage heat pump compressor with auxiliary heat
2 stage heat pump compressor with auxiliary heat c
Conventional
None Aux. Ht. 1 stage heat pump compressor with auxiliary heat
2 stage heat pump compressor with auxiliary heat
None Conventional 1 stage heat with
3-stage cool
Auto-On Heat Cool 2 stage heat (ML984 actuator/
V5013 Valve) 1 stage cool
Selectable Output
1 heat-1 cool; 1 heat-2 cool
2 heat-1 cool; 2 heat-2 cool
1 heat-1 cool; 2 heat-1 cool
1 heat-1 cool; 2 heat-1 cool;
3 heat-1 cool
1 heat-1 cool; 2 heat-1 cool
1 heat-1 cool; 2 heat-1 cool;
3 heat-1 cool
1 heat-1 cool; 2 heat-2 cool
1 heat-1 cool; 2 heat-1 cool
1 heat-1 cool; 2 heat-1 cool;
3 heat-1 cool
1 heat-3 cool (fixed)
1 heat-1 cool; 2 heat-1 cool a c b
Select models do not have auxiliary relay output. The auxiliary relay output is used with an ecomonomizer for minimum position control based on programmed time schedule. Can also be used for switching other external equipment.
Q7300A1000 model configures for 1 heat-1 cool only (fixed).
Uses conventional terminal designations. Compressor changeover is controlled by the heat pump equipment.
Ordering Information
When purchasing replacement and modernization products from your TRADELINE
®
wholesaler or distributor, refer to the Tradeline
Catalog or price sheets for complete ordering number, or specify—
1. Order number.
2. Accessories, if desired.
3. Order additional system components and system accessories separately.
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:
1. Your local Home and Building Control Sales Office (please check the white pages of your phone directory).
2. Home and Building Control Customer Relations
Honeywell, 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and
Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico,
Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
63-4038—7 2
T7200/T7300/Q7300
SPECIFICATIONS
THERMOSTAT
ELECTRICAL RATING: 24 to 30 Vac, 50/60 Hz.
SYSTEM CURRENT DRAW: 6 VA maximum at 30 Vac,
50 or 60 Hz.
OUTPUT RELAY DRAW: See Table 2.
TABLE 2—MAXIMUM AMPS AT 30 VAC.
Relay
Fan
Heat
Cool
Auxillary (Economizer)
Running (A) Inrush (A)
1.6
1.6
1.6
1.6
3.5
3.5
7.5
3.5
TEMPERATURE:
Ratings:
Ambient: 40
°
F to 110
°
F (4
°
C to 43
°
C).
Shipping: -30
°
F to +150
°
F (-34
°
C to +65
°
C).
Display Accuracy:
±
1
°
F (
±
1
°
C).
Setpoint:
Range: 45
°
F to 95
°
F (7
°
C to 35
°
C).
Differential: 2
°
F (1
°
C).
Default Settings: See Table 3.
Control
Heating
Cooling
TABLE 3—DEFAULT SETPOINTS.
Occupied
68
°
F (20
°
C)
78
°
F (26
°
C)
Unoccupied
55
°
F (13
°
C)
90
°
F (32
°
C)
REMOTE SENSOR WIRING TEMPERATURE OFFSET:
Temperature offset occurs with 500 ft (157m) to 1000 ft
(305m) of 2-wire cable. See Table 4.
TABLE 4—TEMPERATURE OFFSET.
Temperature
Range
50-90
°
F
10-32
°
C
18 AWG
-0.4
°
F
-0.3
°
C
20 AWG
-0.7
-0.4
°
°
F
C
22 AWG
-1.0
-0.6
°
°
F
C
MINIMUM STAGE OPERATION TIME:
Conventional Heat: Two minutes On or Off.
Compressor: Two minutes On and four minutes Off.
HUMIDITY RATINGS: 5% to 90% RH, noncondensing.
CLOCK ACCURACY:
±
1 minute per month.
BATTERY BACKUP: Up to 60 hours with fresh 9-volt alkaline battery. Mallory MN11604™ or equivalent.
FINISH: Beige thermostats with brown subbases or Premier
White™ thermostats with light gray subbases.
DIMENSIONS: See Fig. 1.
T7300 Doors: See Fig. 2.
MOUNTING MEANS: T7200 Thermostat mounts on a wallplate. The T7300 mounts on the Q7300 Subbase. The
Q7300 and wallplate mount horizontally on a wall or outlet box with two no. 6 x 32 screws (included).
Fig. 1—Thermostat and subbase dimensions in in. (mm).
8 (204)
1-3/4
(41)
4
(102)
FAN
AUTO ON
EM. HEAT AUX. HEAT
EM. HEAT HEAT OFF COOL
1 T7300/Q7300 ONLY.
Fig. 2—T7300B door.
OCCUPIED •
UNOCCUPIED •
CONT UNOC •
3 HR OCCUPIED •
Fig. 3—T7300C door.
4-5/8
(118)
1
ENVIRONMENTAL
CONTROL
3 HOUR
OCCUPIED
M4404
M4421
OCCUPIED •
UNOCCUPIED •
ENVIRONMENTAL
CONTROL
TO ADJUST HEAT
PRESS SET HEAT THEN
PRESS WARMER OR COOLER
TO ADJUST COOLING
PRESS SET COOL THEN
PRESS WARMER OR COOLER
FOR AFTER HOURS
PRESS OCCUPIED UNOCCUPIED
FOR BUSINESS HOURS
PRESS OCCUPIED UNOCCUPIED AGAIN
SET
HEAT
SET
COOL
WARMER
OCCUPIED
COOLER
UNOCCUPIED
TO ACCESS FULLY PROGRAMMABLE TIME AND TEMPERATURE FEATURES LIFT COVER
M4422
ACCESSORIES:
— 229997BU T7300B Conversion Kit. (See Fig. 2).
— 229997BY T7300A Conversion Kit. (See cover photo).
— 229997CE T7300C Conversion Kit. (See Fig. 3).
— 231054AA White Door Assembly for T7300C. (See
Fig. 3.
— 231055AA White Door Assembly for T7300B. (See
Fig. 2).
— 231056AA White Door Assembly for T7300A. (See cover photo).
— 4074EEP Hardware for door and hinge pin assembly.
3 63-4038—7
T7200/T7300/Q7300
SPECIFICATIONS • RECYCLING • INSTALLATION
— 4074EFS Bag Assembly (two sheet metal screws and two machine screws).
— 4074EKA Bag Assembly (Allen wrench and four
Allen head screws).
— 4074ENE Hinge Pin Assembly.
— C7400 Enthalpy Sensor.
— M7415 Damper Actuator.
— T675A Temperature Control.
— T7022A1010 Remote Temperature Sensor.
— T7047C1025 Remote Temperature Sensor.
— T7047G1000 Remote Temperature Sensor.
— T7147A1002 Remote Temperature Sensor and Override Module.
— T7147A1010 Remote Temperature Sensor and Override Module.
— T7147A1028 Remote Temperature Sensor and Override Module.
— R8222 Switching Relay.
— W950A System Supervisor.
— W859D Packaged Economizer.
— W7459 Economizer Logic Module.
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
M3375
Recycling Notice
this control, or of an old control containing mercury in a sealed tube.
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
2. Check the ratings given on the product to make sure the product is suitable for your application.
3. Installer must be a trained, experienced service technician.
4. Allow thermostat to warm to room temperature before operating.
5. After installation is complete, check out product operation as provided in these instructions.
CAUTION
Disconnect power supply before beginning installation to prevent electrical shock or equipment damage.
LOCATION
Thermostat Without Remote-Mounted
Temperature Sensor
Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature.
See Fig. 4.
Do not mount the thermostat where it can be affected by:
— drafts or dead spots behind doors, in corners or under cabinets.
— hot or cold air from ducts.
— radiant heat from the sun, fireplace, or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall behind the thermostat.
Installation
Thermostat With Remote-Mounted
Temperature Sensor(s)
Install the thermostat in an area that is accessible for setting and adjusting the temperature and settings.
Install the remote-mounted sensor(s) about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 4.
Do not mount the sensor(s) where it can be affected by:
— drafts or dead spots behind doors, in corners or under cabinets.
— hot or cold air from ducts.
— radiant heat from the sun, fireplace, or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall behind the thermostat.
If more than one remote sensor is required, they must be arranged in a temperature averaging network consisting of two, three, four, five, or nine sensors. Instal as shown in
Fig. 5-9.
REPLACE AN EXISTING THERMOSTAT OR
NEW INSTALLATION
Replace An Existing Thermostat
Turn off all sources of power for the thermostat. Remove any existing wallplate or subbase from the wall. To avoid miswiring later, label or write down each wire color with the letter or number on the wiring terminal as the wire is removed.
63-4038—7 4
T7200/T7300/Q7300
INSTALLATION
Fig. 4—Location for installing thermostat or remote-mounted sensor.
NO
YES
NO
5 FEET
[1.5 METERS]
NO
Fig. 5—Two T7047G1000 Sensors providing a temperature averaging network for a T7300/
Q7300 Thermostat/Subbase.
T
Q7300
T
T7047G1000
T
T7047G1000
T
T
T
M3421
Fig. 6—Two T7047C1025 and one T7047G1000
Sensors providing a temperature averaging network for a T7300/Q7300 Thermostat/Subbase.
T
Q7300
T
T7047C
T T
T7047G1000
T T
T7047C
T T
M3418
M4385
Fig. 7—Four T7047C1025 Sensors providing a temperature averaging network for a T7300/
Q7300 Thermostat /Subbase.
T7047C
T
T
Q7300
T
T
T7047C
T T
T7047C
T T
T7047C
T T
M3420
5 63-4038—7
T7200/T7300/Q7300
INSTALLATION
Fig. 8—Five T7047G1000 Sensors providing a temperature averaging network for a T7300/
Q7300 Thermostat/Subbase.
T7047G
T
Q7300
T
T7047G
T
T T
T T7047G
T7047G
T
T
T7047G
T
T
T
T
M3422
Fig. 9—Nine T7047C1025 Sensors providing a temperature averaging network for a T7300/
Q7300 Thermostat/Subbase.
T7047C
T T
T
Q7300
T
T7047C
T T
T7047C
T T
T7047C
T T
T7047C
T T
T7047C
T T
T7047C
T T
T7047C
T T
T7047C
T T
M3419
New Installation
Run cable to a hole at the selected wall location for the thermostat and pull about 3 in. (76 mm) of wire through the opening. Color-coded, 18-gauge thermostat cable with at least one conductor for each wiring terminal is recommended. Good service practice recommends selecting a cable with one or two extra conductors than the immediate application requires.
If using remote temperature sensor(s) or LAN override switch module, refer to the mounting instructions included with the device for wiring cable requirements. Route cable away from sources of electrical noise.
IMPORTANT: The remote sensor(s) or override switch
wires must be in a shielded cable if bundled or placed in the same conduit with the cooling control wires.
Earth ground the shield at the thermostat.
SET Q7300 SUBBASE DIP SWITCHES
NOTE: Subbase dip switches are not available on the T7200
Wallplate.
The Q7300 Subbase provides the T7300 Thermostat with an interface to the single zone HVAC system. See
Table 5 for DIP switch settings. The subbase DIP switches are located on the front and to the right of the wiring terminals. See Fig. 10. Set the DIP switches for the system being controlled.
TABLE 5—SUBBASE DIP SWITCH SETTINGS.
Switch Setting
1 a
OFF 1 stage heat
ON b
2 stage heat
2 a
OFF
ON b
1 stage cool
2 stage cool
4
3 c
Function
OFF Proportional control (allows droop)
ON b
Proportional plus integral (P+I) control (droopless)
ON b
Energizes fan on cool only
5
OFF Energizes fan on heat and cool
ON b
Use internal sensor
OFF Use remote sensor a c b
No effect on 1 heat/1 cool (Q7300A) or 1 heat/3 cool
(Q7300G) models.
Factory setting.
No effect on heat pump systems.
MOUNT SUBBASE OR WALLPLATE
The subbase or wallplate can be mounted on a horizontal outlet box or directly on the wall. For an outlet box installation, go to step 3.
63-4038—7 6
1. For a wall installation, hold subbase or wallplate in position and mark holes for the anchors. See Fig. 4. Wall anchors must be obtained locally. Be careful that the wires do not fall back into the wall opening. Set aside subbase or wallplate.
Fig. 10—Setting subbase DIP switches.
T7200/T7300/Q7300
INSTALLATION
2. Drill four 3/16 in. (4.8 mm) holes and gently tap anchors into the holes until flush with the wall.
3. Pull wires through the cable opening. See Fig. 11.
1
O
N
1
2 3 4 5
B A3 A2 A1 W2 Y2 T T
Y1 G RC RH CA1 CA2 CA3 CA4 CA5
LED1 LED2 COM
1
CONFIGURATION OF ILLUSTRATED SWITCH IS:
1 – ON
2 – OFF
3 – OFF
4 – ON
5 – ON
Fig. 11—Installing subbase on outlet box or on wall.
M4401
B A3 A2 A1 W2 Y2 T T
Y1 G RC RH CA1 CA2 CA3 CA4 CA5
LED1 LED2 COM
OR
SHEET METAL
SCREWS
MOUNTING TO WALL BOARD
MACHINE
SCREWS
7
B A3 A2 A1 W2 Y2 T T
Y1 G RC RH CA1 CA2 CA3 CA4 CA5
LED1 LED2 COM
MOUNTING TO HORIZONTAL 2 X 4 JUNCTION BOX
M4410
63-4038—7
T7200/T7300/Q7300
INSTALLATION
4. Secure the subbase or wallplate with the screws provided. Do not fully tighten the screws.
5. Level the subbase or wallplate for appearance only.
Leveling is not required for operation. Securely tighten the screws.
WIRE SUBBASE OR WALLPLATE
IMPORTANT: Most equipment manufacturers size system
transformers for the equipment installed at the factory. Before connection, be sure that the system transformer can supply the T7200 OR T7300 and Q7300 with adequate power (6 VA). If less than 6 VA is available, install a separate 24 Vac transformer.
CAUTION
Disconnect power supply before beginning installation to prevent electrical shock or equipment damage.
All wiring must comply with local electrical codes and ordinances.
IMPORTANT: Use 18 gauge, solid-conductor wire when-
ever possible. If using 18 gauge stranded wire, no more than 10 wires can be used. Do not use larger than 18 gauge wire.
Follow equipment manufacturer’s wiring instructions when available. See Fig. 23-46 for wiring diagrams. To wire subbase, proceed as follows:
1. Connect the correct wires to the terminals as shown in applicable diagram; the terminal barrier allows straight or wraparound wiring connection. See Fig. 12. A letter code is located near each terminal for identification. Typical terminal designation and wiring connections are listed in Table
6. Connect remote temperature sensor or override switch module.
NOTE: If a remote sensor is used, be sure that the Q7300 DIP switch 5 is placed in the OFF position.
CAUTION
Never install more than one wire per terminal unless using factory-supplied jumper with spade terminal.
Fig. 12—Barrier configuration. Keep wiring restricted to recessed area surrounding terminals.
FOR STRAIGHT
INSERTION –
STRIP 5/16 in. [8 mm]
FOR WRAPAROUND –
STRIP 7/16 in. [11 mm]
RESTRICT
WIRING TO
THIS AREA
FRONT VIEW OF
TERMINAL AREA
WIRING TO BE BELOW
THIS SURFACE
TOP SURFACE
OF SUBBASE
CROSS-SECTIONAL VIEW OF
TERMINAL AREA
M3062
2. Firmly tighten each terminal screw. Loose or intermittent wire connections can cause inconsistent system operation.
3. Fit wires as close as possible to the subbase. Push excess wire back into the hole.
4. Plug hole with nonflammable insulation to prevent drafts from affecting the thermostat.
Refer to Fig. 23-46 for typical hookups. When system installation is complete, perform the initial power up procedure in the Checkout section.
63-4038—7 8
T7200/T7300/Q7300
INSTALLATION
TABLE 6—TERMINAL DESIGNATIONS.
RC
RH
W1
W2
W3
Y1
Y2
Y3 a
X
T
Standard
Terminal
Designation
B
E
G
O
R
Alternate
Designations Or
Customer Specials
K
F
R
V
H1, R3
H2, Y, R4
C1, M
C2
X1,X2,C
L, C, H
O
A,A1,A2,Z,C,L
Typical Connection
Heating damper motor; changeover valve/relay
Emergency heat relay
Fan relay coil
Cooling damper motor; changeover valve/relay
Power connection to transformer (internally connected for heating and cooling)
Power connection to cooling transformer
Power connection to heating transformer
Stage 1 heating control
Stage 2 heating control
Stage 3 heating control
Stage 1 cooling control
Stage 2 cooling control
Stage 3 cooling control a
Common connection
Remote sensor b
HSII control panel
Momentary circuit, changeover
LEDs
Function
Output
Output
Output
Output
Input
Input
Input
Output
Output
Output
Output
Output
Output
Input
Input
Terminal Type
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
24 Vac powered contact
LED1,
LED2, COM
Annunciation
Y
A1, A2, A3
CA1-CA5
T
R1, R2
RS
M
External temperature readout, T relay
LO and HI speed fan relays
Cooling contactor
Compressor contactor
Auxiliary relay
Remote override b
Output
Input
Dry contact
Low power a b
Q7300G only.
Shielded cable can be required in some installations where electrical interference (noise) can cause control problems.
SET THERMOSTAT DIP SWITCHES
The thermostat DIP switches provide the thermostat with an interface to the single zone HVAC system. See
Table 7 for DIP switch settings. The thermostat DIP switches are located on the back of the thermostat. See Fig. 13. Set the DIP switches for the desired thermostat features and the system being controlled.
IMPORTANT: The thermostat configuration must match
the application, or the control logic will not function properly.
TABLE 7—THERMOSTAT DIP SWITCH SETTINGS
Switch Setting
1
2
Function
ON a
°
F display
OFF
°
C display
ON a
12 hour clock display
3
OFF 24 hour clock display
ON a,b
Intermittent fan operation in occupied period
OFF Continuous fan operation in occupied period
4
5 ON a
Nonfunctional switch
Keyboard is used for programming
OFF Keyboard disabled, but can be used to review program, perform overrides and make clock changes.
a b
Factory setting.
Q7300B,C,D,E,L: fan switch will override this switch setting.
Q7300A,F,G: no override is available.
9 63-4038—7
T7200/T7300/Q7300
INSTALLATION
Fig. 13—Setting thermostat DIP switches.
T7300 ONLY
HEAT PUMP CONV
ON 45 90
1 2 3 4 5
ON 45
1 2 3 4 5
M4085A
Fig. 14—Setting thermostat mini-jumper for conventional or heat pump system.
T7300 ONLY
1
HEAT PUMP
2
CONV
ON 45 90
1
2 3 4 5
90
1
2
ONLY PUT MINI-JUMPER IN THIS POSITION WHEN USING Q7300C,D, OR F SUBBASES.
ONLY PUT MINI-JUMPER IN THIS POSITION WHEN USING Q7300A,B,E, OR G SUBBASES.
63-4038—7 10
M4086A
SET THERMOSTAT MINI-JUMPER
NOTE: This operation must be done prior to installing the batteries. If batteries are installed prior to this operation, remove battery for 15 minutes and begin.
The T7300 is factory-set for conventional system control using the Q7300A,B,E,G. If using with a heat pump and Q7300C,D,F, locate the mini-jumper on the back of the
T7300. See Fig. 14. Pull the mini-jumper off the two
CONV pins and move to the two HEAT PUMP pins. This changes the thermostat to the heat pump algorithm.
If you wish to change the control of the thermostat because a new subbase has been purchased, remove battery for 15 minutes, change mini-jumper position, and re-install battery.
MOUNT THERMOSTAT
CAUTION
Always disconnect power supply and remove battery from the T7300 before connecting the ribbon cables to prevent electrical shock and equipment damage.
Use the following procedure to connect the T7300 ribbon cables to the Q7300.
1. Check that the 24 Vac power supply is disconnected from the Q7300.
2. Check that the 9 Vdc battery is not installed in the
T7300.
IMPORTANT: First be sure to connect the 12 pin ribbon
cable to the Q7300.
3. Connect the 12 pin (larger) ribbon cable to the Q7300.
See Fig. 15.
4. Connect the 9 pin (smaller) ribbon cable to the Q7300.
5. If using a 9 Vdc battery, go to the Install Battery
Backup section for installation instructions.
Fig. 15—Connecting the pin ribbon cables to the subbase connectors.
9-PIN SUBBASE
CONNECTOR
12-PIN SUBBASE
CONNECTOR
T7200/T7300/Q7300
INSTALLATION
INSTALL BATTERY (OPTIONAL)
The 9 volt battery is not necessary for the operation of the thermostat, but holds the program during power outages. When the power is restored, the system will resume normal operation. Without the battery, the system will follow the default setpoints. See Table 3. Use the following steps to install a battery:
1. Locate the battery holder on the back of the thermostat.
2. Slide the battery up to the connector until it is firmly seated. See Fig. 16.
NOTE: Observe the polarity when snapping a 9 volt alkaline battery into the holder.
NOTE: The plugs must be firmly seated on the connectors for the thermostat to work properly.
6. Hang the top edge of the thermostat on the subbase hooks. See Fig. 17.
7. Swing down and press on the lower edge until the thermostat snaps in place.
8. Insert and tighten three Allen head screws on the bottom of the thermostat. See Fig. 17.
Fig. 16—Installing optional 9 volt battery.
BATTERY
SNAPS
STEP 1: CONNECT THERMOSTAT
CABLES TO THE SUBBASE.
FIRST CONNECT THE 12 PIN
THEN THE 9 PIN.
STEP 2: SNAP BATTERY INTO PLACE.
STEP 3: SLIDE BATTERY UP TO THE
BATTERY CONNECTOR
UNTIL CONNECTED.
M4408
Fig. 17—Mounting thermostat on subbase.
M4403
11
1
1
DO NOT OVERTIGHTEN SCREWS
M4391
63-4038—7
T7200/T7300/Q7300
PROGRAM THE THERMOSTAT
OVERVIEW
The keyboard is located behind the thermostat flip-up cover. See Fig. 18. There are 16 keys to set, review and modify programmed times and temperatures. The liquid crystal display (LCD) shows day, time or temperature and which programming period is operating.
The thermostat can be set for two occupied and two unoccupied time and temperatures for each day of the week
(28 independent settings). The two override keys provide quick temporary programming changes for increased occupant comfort.
IMPORTANT: To program the thermostat, 24 Vac is re-
quired (turn on system power) and the keyboard lockout switch (see Fig. 27) must be in the ON-KEYBD position.
Fig. 18—Thermostat programming keys and
LCD display.
OCCUPIED •
UNOCCUPIED •
CONT UNOC •
3 HR OCCUPIED •
11:32
AM
HEAT
SET
CLOCK
SET START TIME
SELECT
DAY
OCCUPIED
START TIME
SET TEMPERATURE
OCCUPIED
HEAT
OCCUPIED
COOL
DATA CHANGE
DISPLAY
+
OVERRIDE
3 HOUR
OCCUPIED
DAY COPY
UNOC
START TIME
UNOC
HEAT
UNOC
COOL
CLEAR
START TIME
–
CONT
UNOC
M4384
SET CURRENT TIME/DAY
1. Set the current time by pressing and releasing the
CLOCK key once.
2. Press the + or - key until the current time appears on the
LCD.
3. Set the current day by pressing and releasing the DAY key once.
4. Press the + or - key until the current day appears on the
LCD.
NOTE: Su=Sunday; Mo=Monday; Tu=Tuesday; We=
Wednesday; Th=Thursday; Fr=Friday; Sa=Saturday.
SET PROGRAM TIMES
IMPORTANT: The thermostat will remain in occupied
mode from the point of initial programming until it encounters the first unoccupied start time. To avoid the unnecessary occupied period following initial programming, set a 12:00 AM unoccupied start time on the thermostat when programmed.
Program the Thermostat
NOTE: The programming times are in intervals of ten minutes; i.e., 8:00, 8:10, 8:20.
1. Press the SELECT DAY key. The display shows the abbreviation for a day.
2. Press and hold the + or - key until the desired day appears.
3. Press the OCCUPIED START TIME key. The program indicator will point to OCCUPIED.
4. Press and hold the + or - key until the desired start time appears.
NOTE: Anytime a start time is not required, press the
CLEAR START TIME key.
5. Press the UNOC START TIME key. The program indicator will point to UNOCCUPIED.
6. Press and hold the + or - key until the desired start time appears.
7. To program a second occupied start time for the selected day, repeat Step 3 until four dashes (----) are displayed or the second start time (if previously programmed) is displayed. Then repeat Step 4.
8. To program a second unoccupied start time for the selected day, repeat Step 5 until four dashes (----) are displayed or the second start time (if previously programmed) is displayed. Then repeat Step 6.
9. Repeat Steps 1 through 8 for each remaining day of the week or refer to the following section, COPY A DAY.
COPY A DAY
1. Press the SELECT DAY key. The display shows the abbreviation for a day.
2. Press and hold the + or - key until the day to be copied
from appears.
3. Press the COPY key.
4. Press and hold the + or - key until the day to be copied
to appears.
NOTE: The day to be copied from will remain on the display.
5. Press the COPY key a second time to perform the copy.
6. Repeat Steps 3 to 5 to copy to another day.
SET PROGRAM TEMPERATURE SETPOINTS
NOTE: The setpoint temperature range is 45
°
F (unoccupied heat) to 95
°
F (unoccupied cool). The occupied heat setpoint must be at least 2
°
F less than the occupied cool setpoint.
1. Press the SET TEMPERATURE key (OCCUPIED
HEAT, OCCUPIED COOL, UNOC HEAT, or UNOC
COOL). The program indicator will point to OCCUPIED or
UNOCCUPIED and the LCD will indicate HEAT or COOL.
63-4038—7 12
2. Press and hold the + or - key until the desired temperature appears.
3. Repeat Steps 1 and 2 until all four temperatures are set.
SET OPERATING DISPLAY
The LCD can show time or temperature. To change the current display, press the DISPLAY key until the desired operating display appears.
CLEAR START TIME
1. Press the SELECT DAY key.
2. Press and hold the + or - key until the desired day appears.
3. Press and hold the OCCUPIED START TIME or the UNOC START TIME key until the time to clear appears.
4. Press and hold the CLEAR START TIME key until the display shows four dashes (----).
NOTE: If there is a second OCCUPIED setting, the start for time this setting will appear instead of four dashes (----).
TEMPORARILY OVERRIDE PROGRAM
There are three overrides available. The 3 hour occupied overrides can be initiated from a remote location or the thermostat. The 3 hour occupied override without + or - keys can also be initiated from the T7300B cover.
NOTE: Pressing the DISPLAY key at anytime will return the thermostat to the program.
3 Hour Occupied
The 3 HOUR OCCUPIED key is used to override the unoccupied program when people need to use the area temporarily (working late, weekends or holidays).
1. Press the 3 HOUR OCCUPIED key to change the unoccupied temperature setting to the occupied setpoint for three hours.
NOTE: The program indicator will point to 3 HR OCCU-
PIED while the override is in effect.
3 Hour Occupied with + or - Key
OVERVIEW
Check that all wiring is correctly completed and all sensors are installed. The thermostat should be mounted on the wallplate or subbase. If the thermostat has not been programmed, when the power is first turned on, the LCD will show four dashes (----). Without programming, the thermostat will operate from default temperature setpoints
(see OPERATION section).
NOTE: It is helpful to program the thermostat before using the Checkout procedure. Refer to the Programming section to set a program.
T7200/T7300/Q7300
PROGRAM THE THERMOSTAT • CHECKOUT
SET + OR - KEY VALUE
When using the + or - key with the 3 HOUR OCCU-
PIED key, the + or - key has a preassigned value of 0 to 5
°
F
(default is 0). Use the following steps to check or change the value:
1. Press the 3 HOUR OCCUPIED key. The program indicator will point to 3 HR OCCUPIED.
2. Press the DISPLAY key. The LCD will show a number from 0 to 5.
3. Press the + or - key to change the value.
4. Press the DISPLAY key to return to the program.
Set 3 Hour Occupied Override With + or - Key
The 3 HOUR OCCUPIED key with the + or - key will override the unoccupied program for three hours with the occupied temperature setpoint + the preassigned key value
(see Set + or - Key Value section).
1. Press the 3 HOUR OCCUPIED key to change the unoccupied temperature setting to the occupied setpoint for three hours.
2. Press the + key to increase or press the - key to decrease the occupied setpoint by the key value.
EXAMPLE: Unoccupied setpoint is 62
°
F, occupied setpoint is 70
°
F and key value is 3
°
F. Pressing the
3 HOUR OCCUPIED key and the + key will change the setpoint from 62
°
F to 70
°
F plus 3
°
F or 73
°
F.
Pressing the - key would change the setpoint to 70
°
F minus 3
°
F or 67
°
F.
NOTE: The program indicator will point to 3 HR OCCU-
PIED while the override is in effect. The LCD will not reflect the key value.
Cont Unoc
The continuous unoccupied override feature holds the setpoint at the unoccupied temperature setpoint until the
DISPLAY or CONT UNOC key is pressed. This override is used when the area will be closed for a temporary closing such as a long holiday.
1. Press the CONT UNOC key to hold the temperature at the unoccupied setpoint.
2. Press the CONT UNOC key again to return to the program.
Checkout
If the display has two dashes and a degree sign (--
°
), wait sixty seconds and press the DISPLAY key twice. If the display does not change or is blank, refer to the Troubleshooting section.
TEST MODE
The thermostat has a test mode that aids the installer in performing the checkout. The test mode overrides the minimum on and off times so the checkout can be quickly performed. Press the CLOCK and DAY keys at the same time to start the test mode. All the display segments will appear. See Fig. 19
13 63-4038—7
T7200/T7300/Q7300
CHECKOUT
CAUTION
Do not use the test mode for longer than 10 minutes. The test mode overrides the minimum on and off times that protect the system. Equipment damage can result if the thermostat remains in the test mode.
Fig. 19—All segments on display.
S
U
M
O
AM
PM
T
U
W
E
T
H
F
R
S
A
COMM
HEAT
● ● ●
COOL
BATT
TEST MODE
INDICATOR
M4415
To discontinue the test mode at any time, press the
CLOCK and DAY keys at the same time. The Test Mode
Indicators will no longer show on the screen.
HEAT
NOTE: When the thermostat is used with a subbase with subbase and fan switches, set the switches to AUTO.
1. Press the CLOCK and DAY keys at the same time.
This starts the test mode.
2. Press the DISPLAY key. See Fig. 20.
Fig. 20—Display when starting test sequence.
S
U
AM
COMM
HEAT
● ● ●
COOL
BATT
M4418
3. Press the OCCUPIED HEAT key.
4. Press the + key to raise the setpoint 5
°
F (3
°
C) above the room temperature. The heating should start (both stages if multistage), and the fan should run (may be a short delay on forced air systems).
NOTE: It can be necessary to change the OCCUPIED
COOL setpoint. However, be aware that OCCUPIED
HEAT and OCCUPIED COOL setpoints must have a
2
°
F difference.
5. Press the OCCUPIED HEAT key.
6. Press the - key to lower the setpoint 5
°
F (3
°
C) below the room temperature. The heating should shut off, followed by the fan shutoff.
When the thermostat has a system switch, move the switch to the HEAT position and repeat steps 3 through 6.
COOL
Move switch to auto.
CAUTION
Do not operate cooling if outdoor temperature is below 50
°
F (10
°
C). Refer to the manufacturer recommendations.
NOTE: When cooling setting changes, thermostat will wait up to five minutes before turning on the cooling equipment. This delay is to protect the compressor.
1. Press the OCCUPIED COOL key.
2. Press the - key to lower the setpoint 5
°
F (3
°
C) below the room temperature. The cooling should start (both stages if multistage), and the fan should run.
NOTE: It can be necessary to change the OCCUPIED
HEAT setpoint. However, be aware that the OCCUPIED
HEAT and OCCUPIED COOL setpoints must have a
2
°
F difference.
3. Press the OCCUPIED COOL key.
4. Press the + key to raise the setpoint 5
°
F (3
°
C) above the room temperature. The cooling and fan should shut off.
When the thermostat has a system switch, move the switch to the COOL position and repeat Steps 1 through 4.
Move the system switch to the OFF position. All heating or cooling should stop.
FAN
Thermostat
Fan Switch (located on the back of the thermostat):
— CON: Fan operates continuously in the occupied mode.
— INT-FAN: Fan operates directly with the thermostat call for heating or cooling in the occupied mode.
Subbase
NOTE: Subbase fan switch overrides the thermostat fan switch.
Subbase Dip Switch No. 4:
— ON: Fan operates only with cool.
— OFF: Fan operates with heat and cool.
Q7300E Fan Switch:
— ON: Fan operates continuously.
— AUTO: Fan operates directly with the thermostat call for heating or cooling.
IMPORTANT: Press the CLOCK and DAY keys at the same
time to discontinue the test mode. The Test Mode Indicators will no longer show on the screen. See Fig. 19.
63-4038—7 14
T7200/T7300/Q7300
OPERATION
Operation
T7200/T7300 RELAY LOGIC
The T7300 contains three switching relays. When the mini-jumper is set for conventional applications, the relays control first stage cooling, first stage heating, and fan.
When the mini-jumper is set for heat pump applications, the relays control the heat pump compressor, auxiliary heat, and fan. Because of this change in switching logic, it is important to use Q7300C,D, or F subbases when the T7300 is set for heat pump applications and use Q7300A,B,E,G subbases when the T7300 is set for conventional applications.
The T7200A Relay Logic is for conventional applications. The T7300B Relay Logic is for heat pump applications.
T7200/T7300 AND CONVENTIONAL
THERMOSTATS
P+I Control
The T7200/T7300 microprocessor based control requires that the user understands temperature control and thermostat performance. A conventional electromechanical or electronic thermostat does not control temperature precisely at setpoint. Typically, there is an offset (droop) in the control point as the system load changes. This is a phenomenon that most people in the industry know and accept. Many factors contribute to offset including switch differential, thermal lag, overshoot, cycle rates and system load.
The thermostat microprocessor simultaneously gathers, compares and computes data. Using this data, it controls a wide variety of functions. The special proprietary algorithm (program) in the thermostat eliminates the factors causing offset. This makes temperature control more accurate than the conventional electromechanical or electronic thermostats. The temperature control algorithm is called proportional plus integral (P+I) control.
The thermostat sensor, located on the thermostat or remote, senses the current space temperature. The proportional error is calculated by comparing the sensed temperature to the programmed setpoint. The deviation from the setpoint is the proportional error.
The thermostat also determines integral error, which is a deviation based on the length of error time. The sum of the two errors is the (P+I) error. The cycle rate used to reach and maintain the setpoint temperature is computed using the P+I. The addition of the integral error is what differentiates the thermostat from many other electronic and electromechanical thermostats. See Fig. 21.
Fig. 21—Proportional temperature control versus P+I temperature control.
THERMOSTAT
COOL SETPOINT
PROPORTIONAL COOL
CONTROL POINT
P+I CONTROL
POINT
100
P+I CONTROL POINT
PROPORTIONAL HEAT
CONTROL POINT
THERMOSTAT
HEAT SETPOINT
HEATING COOLING
50 0
PERCENT LOAD
50 100
M4414
While the thermostat is designed to eliminate droop, allowing droop can be desirable in applications where building visitors are dressed for the weather and their stays are brief. Examples of these applications include fast food restaurants and convenience stores. The droopless feature of the thermostat can be overridden by placing the droop/ droopless select switch located on the subbase in the OFF position. This removes the integral calculation from the thermostat control scheme, allowing only the proportional control to occur.
EQUIPMENT PROTECTION
As part of the operational sequence, the T7200/T7300 microprocessor also incorporates minimum On and Off times for all heating and cooling stages. Minimum On and
Off times assure that rapid cycling of equipment will not occur, extending equipment life. Minimum On/Off times for compressor stages are two minutes On and four minutes
Off. Minimum On/Off times for heat (electric resistive or gas) are two minutes.
T7200/T7300 THERMOSTAT OPERATION
Startup
When power to the thermostat is turned on, a startup and initialization program begins. The startup takes place after total loss of power (24 Vac and battery backup). At this time, the system default values are put into memory (replacing the user program that was lost). Default values are heating 68
°
F (20
°
C) and cooling 78
°
F (26
°
C) for the occupied modes. Unoccupied default values are heating 55
°
F
(13
°
C) and cooling 90
°
F (32
°
C).
15 63-4038—7
T7200/T7300/Q7300
OPERATION
NOTE: These unoccupied defaults are only used if an unoccupied start time is entered or the CONT UNOC key is pressed. Immediately following initialization, the user can enter new setpoints to be used in place of the default values.
If the battery backup was operating during a power failure, and 24 Vac power comes back on, the user-entered time and temperature program saved in memory is used. If
24 Vac is lost, and no battery backup exists, the default temperatures is placed into memory when the power comes back on. These default values are then used for temperature control.
Occupied
When the thermostat is operating in the occupied mode, the temperature is controlled to the occupied heat or cool setpoint. The normally open (A1) auxiliary relay contacts are closed and the normally open contacts (A3) auxiliary relay contacts are opened during the occupied modes (if the subbase being used has this option). The fan operates as follows:
• No switching subbase used: Operation of the fan is continuous (fan always energized) unless the fan option switch on the back of the T7300 (#3) is set to intermittent (cycles with Y1 or W1).
• Switching subbase used: Q7300 fan switch can be set to ON (always energized) or AUTO (cycles with Y1 or W1).
NOTE: If subbase configuration switch no. 4 (on any Q7300 conventional subbase) is set to the ON position, the fan cycles on a call for cooling only; switch no. 4 has no effect on heat pump subbases (Q7300C, D, F).
Unoccupied
When the thermostat is operating in the unoccupied mode, the temperature is controlled to the unoccupied heat or cool setpoint. The auxiliary relay contacts is open and the fan operates as follows:
• Switching or non-switching subbase used: Fan is always be intermittent (cycles with Y1 or W1). See
NOTE for OCCUPIED.
Conventional System
RECOVERY FROM UNOCCUPIED
Intelligent Recovery™ is a Honeywell trademark for the way the thermostat controls the heating and cooling equipment during recovery from unoccupied to occupied setting. During recovery, the control point ramps up at the rate of 5
°
F (3
°
C) per hour rather than jumping from the energy savings setting to the comfort setting all at once.
This provides additional energy savings.
When the Intelligent Recovery™ is used in the heating mode, the control point raises 5
°
F (3
°
C) per hour, maximizing the use of the more economical first stage heat to bring the sensed temperature to the desired comfort setpoint. This minimizes using the typically more expensive second stage heat.
The advantages are:
• Comfort setting is achieved at the programmed time and maintained regardless of weather conditions; occupants are comfortable.
• Drafts from low temperature discharge air are minimized during occupied periods.
• The thermostat automatically uses the more economical first stage of heat as the primary heat source during heat mode recovery, avoiding the use of the expensive second stage heating.
• Comfort and energy savings can be achieved in both heating and cooling.
• The thermostat reduces heat cycling, extending equipment life.
Heat Pump Operation
The T7200 is fixed for either heat pump or conventional control applications. The T7300 is configurable for either heat pump or conventional applications, depending on the subbase used. Additional information is required when configured for heat pump.
The heat pump mini-jumper (located on the back of the thermostat) places the thermostat into the heat pump mode.
Refer to the Installation section.
O AND B TERMINALS FOR HEATING
OR COOLING CHANGEOVER
The Q7300C and F controls heat pump changeover. The
Q7300D is only used in a heat pump application when the heat pump controls the reversing valve changeover. See
Table 8 for the operation of the O and B terminals on the
Q7300C and F.
TABLE 8—OPERATION OF THE Q7300
O AND B TERMINALS.
Heat
System Switch
Cool
Auto (Heat) a
Auto (Cool) b
Emergency Heat
Off
Open
Closed
O
Open
Closed
Open c
B
Closed
Open
Closed
Open
Closed c c a b
When the system is calling for heat or is de-energized, but the last function was heat.
When the system is calling for cool or is de-energized, but the last function was cool.
When the last function was heating, the operation is the same as Auto (Heat). If the last function was cooling, the operation is the same as Auto (Cool).
RECOVERY FROM UNOCCUPIED
The heating recovery ramp is 3
°
F per hour, which differs from the 5
°
F per hour for conventional systems. The
3
°
F degree difference helps the system use the economical heat pump more and the expensive auxiliary heat less. The cooling ramp is 5
°
F, the same as conventional systems.
63-4038—7 16
FAN OPERATION
When the subbase fan switch is in the ON position, the fan is energized continuously in the occupied mode. The
AUTO position energizes the fan with the heating or cooling system. If the subbase is Q7300D, during unoccupied mode, the fan cycles with Y1 and W1.
NOTE: The Q7300 switch no. 4 has no effect when the thermostat is configured for heat pump.
EMERGENCY HEAT
When the system switch is in the EM. HEAT position
(on select Q7300 subbases), the auxiliary heat is stage 1 and the compressor stages are locked off. The fan cycles with the auxiliary heat.
GENERAL OPERATION INFORMATION
Cycle Rates
The thermostat control algorithm maintains the temperature by cycling stages of heating or cooling to meet setpoint. See Table 9 for the nominal cycle rates provided.
TABLE 9—NOMINAL CYCLE RATES
FOR HEATING AND COOLING.
System Type
Conventional
Heat Pump
H1
8
4
H2
8
8
C1
4
4
C2
4
4
C3
4
—
Subbase Auxiliary Relay
The Q7300 auxiliary relay output acts as a time-of-day switch to be used with an economizer minimum position control. The normally open (A1) auxiliary relay contacts are closed during the occupied period and open during the unoccupied period. The normally closed (A3) auxiliary relay contacts are open during the occupied period and closed during the unoccupied period. The contacts are in the normal state during recovery.
Interfacing with Electromechanical Economizers
(Subbases with Auxiliary Relay)
Mechanical cooling is often used when outside temperatures are in the 50
°
to 60
°
F range and humidity is below 50 percent. In central and northern climates, hundreds of hours fall into this temperature category. By permitting 80 to 100 percent outside air into the system, mechanical cooling may not be needed at all, particularly during spring and fall.
An economizer is used to take advantage of the outside air. The typical economizer consists of an outside air damper, motor, outdoor air changeover control and a minimum position potentiometer. The motor controls the dampers.
Suitability of the outside air for cooling is determined by the outdoor air changeover control. The potentiometer is used for adjusting the minimum position of the economizer dampers, which provide a minimum amount of fresh air for ventilation.
The economizer reduces compressor run time, thereby saving energy and extending the compressor life. The drawback to the economizer is that during the unoccupied
T7200/T7300/Q7300
OPERATION period, if there is no call for cooling or outdoor air is not suitable for free cooling, the economizer is controlled to minimum position. This position allows some percentage of outdoor air to enter the building, regardless of air suitability. The situation can cause the heating or cooling to run more often than if suitable outdoor air is permitted to enter the building.
The thermostat can take advantage of an economizer by connecting the auxiliary relay contacts (A1 and A2) of the subbase to control the economizer minimum position potentiometer. The contacts close during the occupied period, allowing the economizer to operate normally. The contacts are open duirng the unoccupied period, disabling the minimum position feature of the economizer. The open contacts cause the economizer to drive dampers fully closed instead of staying at minimum open position. This reduces the possibility of unsuitable outdoor air from entering the building, which lowers the internal load on the HVAC system are saves additional energy.
Other Uses for the Auxiliary Relay
Examples of other uses of the auxiliary relay are hot water heaters, lighting or baseboard heat. The additional loads are connected to the auxiliary relay contacts on the subbase. The contacts are rated for 1.6A at 30 Vac, but can be adapted to higher current applications with the use of an external relay and transformer. See Fig. 22.
Duty Cycle Interface
Duty cycling HVAC equipment controlled with a T7200 or T7300 is recommended because the thermostat is already maintaining an optimum control cycle rate. Adding another external duty cyle increases the P+I error being sensed and results in degradation of temperature control and equipment efficiency.
Fig. 22—Use of external relay and transformer for auxiliary loads greater than 1.6A.
L1
(HOT)
L2
1
Q7300 SUBBASE
AUXILIARY
RELAY
CONTACTS
A1
A2
A3
3
2
TO
LOAD
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
RELAY REQUIRED (R8222 OR SIMILAR).
3
TERMINAL A3 AVAILABLE ON Q7300A,B,D,E AND G MODELS ONLY
M4383
17 63-4038—7
T7200/T7300/Q7300
CROSS REFERENCE
Cross Reference
Refer to Table 10 for thermostat and subbase cross referencing information.
TABLE 10—THERMOSTAT AND SUBBASE CROSS REFERENCE.
Model
Number
Fig.
No.
Description
Trade
Replacement Remarks
T7200A 7-day programmable thermostat for commercial conventional systems.
A1006 23,24,25 Tradeline®.
T7200A1006 Beige color
A1022 23,24,25 International faceplate.
T7200A1006 Beige color
T7200B 7-day programmable thermostat for commercial water source heat pump systems.
B1004 9,26 Tradeline.
T7200B1004 Beige color
B1012 9,26
B1020 9,26
Mammoth part number 71116701.
Carrier part number HH07AX010A.
T7200B1004
T7200B1004
Beige color
Beige color
T7300A 7-day programmable thermostat for commercial conventional systems.
A1005
1
Tradeline®.
T7300A1005 Beige color
A1013
A1021
1
1
York part no. 025-27506. Used in Y7300B1008,
Y7300C1006 and Y7300D1004.
Lennox part no. 81G5901.
T7300A1005 Beige color
T7300A1104 Premier White™ color
T7300A1005 Beige color
T7300A1104 Premier White™ color
A1039
1
A1047
A1054
A1062
A1070
1
1
1
1
Trane part no. THT-0608.
Micrometl part no. 901-114. Used in Y7300A1000 and Y7300C11014.
International face plate.
T7300A1005 Beige color
T7300A1104 Premier White™ color
T7300A1005
T7300A1104
Beige color
Premier White™ color
T7300A1005 Beige color
T7300A1104 Premier White™ color
Carrier part no. HH07AX005. Used in Y7300A1018.
T7300A1005 Beige color
T7300A1104 Premier White™ color
International face plate.
T7300A1005 Beige color
T7300A1104 Premier White™ color
A1088
A1104
1
1
Spanish face plate.
Tradeline.
T7300A1005 Beige color
T7300A1104 Premier White™ color
T7300A1104 Premier White™ color
T7300B Fully configurable programmable thermostat with 3-HOUR OVERRIDE key on cover. See figure 2 for view of door.
B1003
B1011
1
1
Tradeline.
Climate Control part no. 490249B-05.
T7300B1003
T7300B1003
Beige color
Beige color
B1029
B1037
1
1
McQuay part no. 490249B-06.
Arcoaire part no. 1506746. Used in Y7300B1024.
T7300B1052 Premier White™ color
T7300B1003 Beige color
T7300B1052 Premier White™ color
T7300B1003 Beige color
B1045
B1052
1
1
Comfort Maker part no. 1505746. Used in
Y7300B1016.
Tradeline.
T7300B1052 Premier White™ color
T7300B1003 Beige color
T7300B1052 Premier White™ color
T7300B1052 Premier White™ color
1
See subbase for figure number.
(Continued)
63-4038—7 18
T7200/T7300/Q7300
CROSS REFERENCE
TABLE 10—THERMOSTAT AND SUBBASE CROSS REFERENCE (Continued).
Model
Number
Fig.
No.
Description
Trade
Replacement Remarks
T7300C Fully configurable programmable thermostat with limited access cover. See Figure 3 for view of door.
C1001
C1019
1
1
Tradeline.
Tradeline. Premier White™ T7300.
T7300C1001
T7300C1019
Beige color
Premier White™ color
Subbase
Q7300A Conventional equipment. System: none. Fan: none.
A1000 27
A1018 28,29,
30,32,
35,36
A1034 27,32
Tradeline. 1 heat and 2 cool.
Tradeline. 2 heat and 2 cool.
Trane part no. BAS-0444.
Q7300A1000
Q7300A1018
Brown color
Brown color
A1042 28,29, Trane part no. BAS-0445.
30,32,
35,36
Micrometl part no. 901-3. Used in Y7300A1000.
A1059 28,29
30,32,
35,36
A1067 28,29, Carrier part no. HH93AX005.
30,32,
35,36
A1075 27,32
A1083 28,29,
30,32,
35,36
Tradeline. Used with Premier White™ T7300.
1 heat and 1 cool.
Tradeline. Used with Premier White™ T7300.
2 heat and 2 cool.
Q7300A1000 Brown color
Q7300A1075 Light gray color
Q7300A1018
Q7300A1083
Q7300A1018
Q7300A1083
Q7300A1018
Q7300A1083
Q7300A1075
Q7300A1083
Brown color
Light gray color
Brown color
Light gray color
Brown color
Light gray color
Light gray color
Light gray color
Q7300B Conventional equipment. System: Heat-Off-Cool-Auto. Fan: Auto-On.
B1008 28,29,
30,32,
35,36
Tradeline. 2 heat and 2 cool.
Q7300B1008 Brown color
B1016 28,29, Lennox part no. 81G6001.
30,32,
35,36
B1024 28,29, York part no. 025-227507. Used in Y7300B1008.
30,32,
35,36
Q7300B1008
Q7300B1073
Q7300B1081
Brown color
Brown color
Light gray color
Q7300B1008 Brown color
Q7300B1073 Brown color
Q7300B1081 Light gray color
B1032 28,29, Trane part no. BAS-0446.
30,32,
35,36
B1040 28,29, Carrier part no. HH93AAX004.
30,32,
35,36
B1057 28,29, Snyder General part no. 1520510. Used in
30,32, Y7300B1016 and Y7300B10224.
35,36
Snyder General part no. 490249B-04.
B1065 28,29
30,32,
35,36
Q7300B1008
Q7300B1073
Q7300B1081
Brown color
Brown color
Light gray color
Q7300B1008 Brown color
Q7300B1073 Brown color
Q7300B1081 Light gray color
Q7300B1008 Brown color
Q7300B1073 Brown color
Q7300B1081 Light gray color
Q7300B1008 Brown color
Q7300B1073 Brown color
Q7300B1081 Light gray color
1
See subbase for figure number.
(Continued)
19 63-4038—7
T7200/T7300/Q7300
CROSS REFERENCE
TABLE 10—THERMOSTAT AND SUBBASE CROSS REFERENCE (Continued).
Model
Number
Fig.
No.
B1073 28,29,
30,32,
35,36
B1081 28,29,
30,32,
35,36
2 heat and 2 cool.
Description
Tradeline. 2 heat and 2 cool.
Tradeline. Used with Premier White T7300.
Trade
Replacement Remarks
Q7300B1073 Brown color
Q7300B1081 Light gray color
Q7300C Heat pump systems. System: Em. Ht.-Heat-Off-Cool-Auto. Fan: Auto-On.
C1006 38,42 Tradeline. 1 stage heat pump.
Q7300C1006 Brown color
C1014 40
C1022 40
Tradeline. 2 stage heat pump.
Lennox part no.81G6901.
Q7300C1014
Q7300C1014
Brown color
Brown color
C1030 40 York part no. 025-27508. Used in Y7300C1006.
Q7300C1089 Brown color
Q7300C1105 Light gray color
Q7300C1014 Brown color
Q7300C1089 Brown color
C1048 38,42
C1055 40
C1063 38,42
C1071 40
C1089 40
C1097 38,42
C1105 40
Trane part no.BAS-0447.
Trane part no.BAS-0448.
Micrometl part no. 901-24. Used in Y7300C1014.
Obsolete
Tradeline. 2 stage heat pump.
Tradeline. Used with Premier White T7300.
1 stage heat pump.
Tradeline. Used with Premier White T7300.
2 stage heat pump.
Q7300C1105 Light gray color
Q7300C1014 Brown color
Q7300C1089 Brown color
Q7300C1105 Light gray color
Q7300C1014 Brown color
Q7300C1089 Brown color
Q7300C1105 Light gray color
Q7300C1006 Brown color
Q7300C1097 Light gray color
Brown color
Q7300C1089 Brown color
Q7300C1097 Light gray color
Q7300C1105 Light gray color
Q7300D Heat pump system. System: Em.Ht.-Heat-Off-Cool-Auto. Fan: Auto-On.
D1004 41 Carrier part no. HH93AX002.
Q7300D1038 Brown color
Q7300D1061 Brown color
Q7300D1079 Light gray color
D1012 39,42
D1020 41
Carrier part no. HH93AX003.
Q7300D1053 Brown color
Q7300D1087 Light gray color
York part no. 025-27724-000. Used in Y7300D1004.
Q7300D1038 Brown color
Q7300D1061 Brown color
D1038 41
D1046 41
Tradeline. 2 stage heat pump.
Lennox part no. 13H7601.
Q7300D1079 Light gray color
Q7300D1038 Brown color
Q7300D1038 Brown color
Q7300D1061 Brown color
Q7300D1079 Light gray color
(Continued)
63-4038—7 20
T7200/T7300/Q7300
CROSS REFERENCE
TABLE 10—THERMOSTAT AND SUBBASE CROSS REFERENCE (Continued).
Model
Number
D1053
D1061 41
D1079 41
Fig.
No.
D1087 39,42
Description
Tradeline. 1 stage heat pump.
Tradeline. 2 stage heat pump.
Tradeline. Used with Premier White T7300.
2 stage heat pump.
Tradeline. Used with Premier White T7300.
1 stage heat pump.
Trade
Replacement Remarks
Q7300D1053 Brown color
Q7300D1061 Brown color
Q7300D1079 Light gray color
Q7300D1087 Light gray color
Q7300E Conventional equipment. System: none. Fan: none.
E1001 28,29,
30
Tradeline. 2 heat and 2 cool.
E1019 28,29,
30
Tradeline. Used with Premier White T7300.
2 heat and 2 cool.
Q7300E1001
Q7300E1019
Brown color
Light gray color
Q7300F Heat pump systems. System: none. Fan: none.
F1009 44 Tradeline. 1 stage heat pump.
F1017 44
F1025 44
F1033 44
Tradeline. 2 stage heat pump.
Tradeline. Used with Premier White T7300.
1 stage heat pump.
Tradeline. Used with Premier White T7300.
2 stage heat pump.
F1041 43
Q7300F1009
Q7300F1017
Q7300F1025
Q7300F1033
Brown color
Brown color
Light gray color
Light gray color
Carrier part no. HH93AX006. Used in Y7300A1018.
Q7300F1009 Brown color
Q7300F1025 Light gray color
Q7300G Conventional equipment. System: Heat-Off-Cool-Auto. Fan: none.
G1007 31,32,
33,34
Tradeline. 1 heat and 3 cool.
Q7300G1007 Brown color
G1015 31,32,
33,34
Tradeline. Used with Premier White T7300.
1 heat and 3 cool.
Q7300G1015 Light gray color
Q7300L Conventional equipment. System: none. Fan: Auto-On.
L1006 45 LDS Church.
L1014 46 Tradeline. 2 heat and 1 cool.
Q7300L1014
Q7300L1014
Brown color
Brown color
21 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Wiring Diagrams
Fig. 23—T7200A with wallplate.
T7200
THERMOSTAT
C1
H1
FAN
WALLPLATE
RH
RC
X
Y1
W1
G
2
EXISTING HVAC EQUIPMENT
HVAC EQUIPMENT
TERMINAL STRIP
R
C
Y1
W1
G
(IF NO "C" TERMINAL)
COOL 1
HEAT 1
FAN
SYSTEM
TRANSFORMER
L1
(HOT)
L2
1
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
M4405
63-4038—7 22
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 24—T7200A with 1-stage cooling system with differential enthalpy changeover using W7459A/C7400 with
M7415 Actuator.
W7459A ECONOMIZER PACKAGE
TR TR1
M7415 ACTUATOR
TR
TR1
OUTDOOR
AIR ENTHALPY
SENSOR
C7400
RETURN AIR
ENTHALPY
SENSOR
C7400
+
S
+
S
5
SO
SR
1
+
+
5
2
1K
4
C7150B MIXED
OR DISCHARGE
AIR SENSOR
3
4
T T1
2K
18
1S1
3
T
T1
P
P1
MINIMUM POSITION
ADJUSTMENT
P1
P
X C
Y1
W
R
T6301 AMBIENT
LOCKOUT CONTROL
50 o
F SETPOINT
Y1
Y2
COOL 1
W1
W1
HEAT 1
G
RH
RC
T7200A
WALLPLATE
6
G
R
HVAC EQUIPMENT
TERMINAL STRIP
FAN
L1
(HOT)
L2
1
2
1
2
3
4
5
6
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 24 VAC SECONDARY.
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR,
T7200 AND WALLPLATE
AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS
ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY.
FIELD INSTALLED JUMPER.
M4407
23 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 25—T7200A with electric heat system.
T7200
THERMOSTAT
WALLPLATE
EXISTING HVAC EQUIPMENT
RH
2
R
SYSTEM
TRANSFORMER
RC
X C
C1
Y1
Y1
H1
FAN
W1
G
W1
G
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
RELAY REQUIRED (R8222 OR SIMILAR).
(IF NO "C" TERMINAL)
3
COOL 1
ELECTRIC
HEAT FAN
RELAY 1K
1K1
HEAT 1
FAN
M4406
1
L1
(HOT)
L2
Fig. 26—T7200B with 1-stage heat pump system.
T7200
THERMOSTAT WALLPLATE EXISTING HVAC EQUIPMENT
C/O
H1/C1
FAN
R
X
O
Y
G
HVAC EQUIPMENT
TERMINAL STRIP
SYSTEM
TRANSFORMER
R
1
L1
(HOT)
L2
C
O
(IF NO "C" TERMINAL)
REV.
VALVE
Y
G
COMP.
FAN
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
M4396
63-4038—7 24
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 27—T7300/Q7300A with single transformer 1-stage heat/1-stage cool system.
T7300
THERMOSTAT
C1
H1
FAN
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA4
CA5
T
T
CA1
CA2
CA3
Q7300 SUBBASE
RH
RC
X
2
EXISTING HVAC EQUIPMENT
HVAC EQUIPMENT
TERMINAL STRIP
R
C
Y1
W1
(IF NO "C" TERMINAL)
COOL 1
HEAT 1
SYSTEM
TRANSFORMER
L1
(HOT)
L2
1
Y1
W1
G
COM
LED1
LED2
3
G
FAN
1
L1
(HOT)
L2
1
2
3
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
24 VAC ONLY.
M4386
25 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 28—T7300/Q7300A,B,E used with single transformer 1-stage heat/2-stage cool system.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
RH
RC
X
2
HVAC EQUIPMENT
TERMINAL STRIP
R
C
SYSTEM
TRANSFORMER
L1
(HOT)
L2
1
(IF NO "C" TERMINAL)
C2
Y1
Y2
C1
H1
FAN
H2
Y2
Y1
W2
W1
G
W1
G
1
2
3
4
COM
L1
(HOT)
CA1
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA2
CA3
CA4
LED1
LED2
3
L2
1
CA5
A1
T
3
ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
24 VAC ONLY.
MODEL
NUMBER
Q7300A
Q7300B
Q7300E
FAN
SWITCH
NO
YES
YES
SYSTEM
SWITCH
NO
YES
NO
COOL 1
COOL 2
HEAT 1
FAN
SYSTEM SWITCH
HEAT
OFF
COOL
AUTO
FAN SWITCH
ON
AUTO
M4387
4
4
63-4038—7 26
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 29—T7300/Q7300A,B used with single transformer 2-stage heat/1-stage cool system.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
RH
RC
X
2
HVAC EQUIPMENT
TERMINAL STRIP
R
C
SYSTEM
TRANSFORMER
L1
(HOT)
L2
1
(IF NO "C" TERMINAL)
C2
Y1
C1
H1
FAN
H2
Y2
Y1
W2
W1
G
W1
W2
G
1
2
3
4
CA1
COM
L1
(HOT)
CA2
3
1
L2
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA3
CA4
LED1
LED2
CA5
A1
T
3
ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
24 VAC ONLY.
MODEL
NUMBER
Q7300A
Q7300B
Q7300E
FAN
SWITCH
NO
YES
YES
SYSTEM
SWITCH
NO
YES
NO
COOL 1
HEAT 1
HEAT 2
FAN
SYSTEM SWITCH
HEAT
OFF
COOL
AUTO
FAN SWITCH
ON
AUTO
M4388
4
4
27 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 30—T7300/Q7300A,B,E used with single transformer 2-stage heat/2-stage cool system without economizer.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
RH
HVAC EQUIPMENT
TERMINAL STRIP
SYSTEM
TRANSFORMER
2
R
RC
X
C
1
(IF NO "C" TERMINAL)
Y1
C2
C1
Y2
Y1
Y2
H2
W1
H1
W2
W1
W2
FAN
G
G
1
2
3
4
CA1
COM
L1
(HOT)
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA2
CA3
CA4
LED1
LED2
3
L2
1
CA5
A1
T
3
ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
24 VAC ONLY.
MODEL
NUMBER
Q7300A
Q7300B
Q7300E
FAN
SWITCH
NO
YES
YES
SYSTEM
SWITCH
NO
YES
NO
COOL 1
COOL 2
HEAT 1
HEAT 2
FAN
SYSTEM SWITCH
4
HEAT
OFF
AUTO
COOL
FAN SWITCH
4
ON
AUTO
M4389
L1
(HOT)
L2
63-4038—7 28
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 31—T7300/Q7300G with single transformer 1-stage heat/3-stage cool system.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
RH
2
HVAC EQUIPMENT
TERMINAL STRIP
R
SYSTEM
TRANSFORMER
RC
X C
C2
Y1
Y2
C1
H1
FAN
C3
Y2
Y1
Y3
W1
G
Y3
W1
G
1
2
3
COM
L1
(HOT)
CA1
CA2
3
1
L2
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA3
CA4
LED1
LED2
CA5
A1
T
3
ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
24 VAC ONLY.
(IF NO "C" TERMINAL)
COOL 1
COOL 2
COOL 3
HEAT 1
FAN
SYSTEM SWITCH
HEAT
OFF
AUTO
COOL
M4390
1
L1
(HOT)
L2
29 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 32—T7300/Q7300A,B,G defeating economizer minimum position during unoccupied period in a
2-stage cool system with single enthalpy changeover using W7459A/C7400 with an M7415 actuator.
W7459A ECONOMIZER PACKAGE
M7415 ACTUATOR
TR
TR1
ENTHALPY
SENSOR
C7400
5
+
S
620 OHM
RESISTOR
C7150B MIXED
OR DISCHARGE
AIR SENSOR
SO
SR
TR TR1
+
+
5
1
2
3
4
T T1
P
P1
1K
4
2K
18
1S1
3
MINIMUM POSITION
ADJUSTMENT
T
T1
P1
P
A1
A2
24 VAC
TR
TR1
SENSOR
T1
T
MIN
POS
P1
P
X C
M7415
Y1
Y2
W
R
T6301 AMBIENT
LOCKOUT CONTROL
Y1
Y2
COOL 1
COOL 2
W2
W2
HEAT 2
W1
W1
HEAT 1
G
3
4
1
2
5
6
RH
G
FAN
RC
6
R
T7300/Q7300
HVAC EQUIPMENT
TERMINAL STRIP
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
L1
(HOT)
L2
1
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
1S, AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
FIELD INSTALLED JUMPER.
M4392
63-4038—7 30
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 33—T7300/Q7300G defeating economizer minimum position during unoccupied period in 3-stage cool system with single enthalpy changeover using W7459A/C7400 with M7415 Actuator.
ENTHALPY
SENSOR
C7400
5
+
S
620 OHM
RESISTOR
W7459A ECONOMIZER PACKAGE
1K
4
2K
M7415 ACTUATOR
TR
TR1
C7150B MIXED
OR DISCHARGE
AIR SENSOR
SO
SR
TR TR1
+
+
5
T
P
1
2
3
4
T1
P1
18
1S1
3
MINIMUM POSITION
ADJUSTMENT
P1
P
T
T1
3K
A1
A2
X
3K1
3K2
C
24 VAC
TR
TR1
SENSOR
T1
T
MIN
POS
P1
P
Y1
Y2
W
R
T6301 AMBIENT
LOCKOUT
CONTROL
60 o
F SETPOINT
Y1
Y2
COOL 1
COOL 2
M7415
Y3
Y3
COOL 3
W1
W1
HEAT 1
G
3
4
1
2
5
6
RH
G FAN
RC
6
R
T7300/Q7300
HVAC EQUIPMENT
TERMINAL STRIP
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
L1
(HOT)
L2
1
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
1S, AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
RELAYS 1K AND 3K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
FIELD INSTALLED JUMPER.
M4395
31 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 34—T7300/Q7300G with W859A Economizer package in 1-stage heat/3-stage cool system defeating economizer minimum position during unoccupied period.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
RH
RC
4
1 2
3
HVAC EQUPIMENT
TERMINAL STRIP
R
SYSTEM
TRANSFORMER
L1
(HOT)
L2
2
3K
3
C1
H1
X
C2
Y2
Y1
Y3
W1
Y2
Y3
Y1
W1
COOL 3
HEAT 1
4
5K
7
FAN
G
G
FAN
COM
6K
6K1
COOL 1
LED1
8
LED2
3K1
BLACK
YELLOW
COOL 2
AUXILIARY
RELAY
CONTACTS
A1
A2
8
A3
9
4K
4
TYPICAL W859D ECONOMIZER CONTROL PACKAGE
MODUTROL
MOTOR
MIXED AIR
TEMPERATURE
B1
CONTROLLER
BLUE
W
R
RISE
W1
5
B
BLACK
1K1 1K2
R1
YELLOW
OUTDOOR AIR
CHANGEOVER
SWITCH
T2
T1
W
R
OPEN
B
2K
2K1
2K2
W
R
B
T875 LOW
AMBIENT
COMPRESSOR
LOCKOUT
1K
1
L1
(HOT)
L2
5K1
MINIMUM POSITION
POTENTIOMETER
7
8
9
2
3
4
RED
VIOLET
VIOLET
4K1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
24 VAC SECONDARY.
MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY RISE AND 2-3 ON ENTHALPY FALL.
5
RELAY REQUIRED (R8222 OR SIMILAR).
IMPORTANT: MIXED AIR SENSOR MUST BE LOCATED DOWNSTREAM OF THE EVAPORATOR COIL
IN THE DISCHARGE AIR DUCT TO PROVIDE ECONOMIZER LOW LIMIT FUNCTION.
6
FIELD INSTALLED JUMPER.
ECONOMIZER MOTOR SPRING RETURNS CLOSED ANYTIME FAN IS NOT RUNNING.
24 VAC ONLY.
A3 TERMINAL AVAILABLE ON Q7300A,B,D,E, AND G MODELS ONLY.
M4409
63-4038—7 32
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 35—T7300/Q7300A,B with W859D economizer package in 2-stage heat/2-stage cool system defeating economizer minimum position during unoccupied period.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
RH
RC
4
1 2
3
HVAC EQUPIMENT
TERMINAL STRIP
R
SYSTEM
TRANSFORMER
L1
(HOT)
L2
2
3
3K
C2
X
Y2
C1
Y1
Y2
W2
Y1
HEAT 2
H1
H2
W2
W1
W1
HEAT 1.
4
5K
7
FAN
G
FAN
G
COM
COOL 1
AUXILIARY
RELAY
CONTACTS
A1
A2
8
A3
9
LED1
8
LED2
3K1
BLACK
YELLOW
COOL 2
4K
4
TYPICAL W859D ECONOMIZER CONTROL PACKAGE
MODUTROL
MOTOR
MIXED AIR
TEMPERATURE
B1
CONTROLLER
BLUE
W
R
RISE
W1
5
B
BLACK
1K1 1K2
R1
YELLOW
OUTDOOR AIR
CHANGEOVER
SWITCH
T2
T1
W
R
OPEN
B
2K
2K1
2K2
W
R
B
T875 LOW
AMBIENT
COMPRESSOR
LOCKOUT
1K
1
L1
(HOT)
L2
5K1
MINIMUM POSITION
POTENTIOMETER
6
7
8
9
3
4
RED
VIOLET
VIOLET
4K1
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
24 VAC SECONDARY.
2
MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY RISE AND 2-3 ON ENTHALPY FALL.
RELAY REQUIRED (R8222 OR SIMILAR).
5 IMPORTANT: MIXED AIR SENSOR MUST BE LOCATED DOWNSTREAM OF THE EVAPORATOR COIL
IN THE DISCHARGE AIR DUCT TO PROVIDE ECONOMIZER LOW LIMIT FUNCTION.
FIELD INSTALLED JUMPER.
ECONOMIZER MOTOR SPRING RETURNS CLOSED ANYTIME FAN IS NOT RUNNING.
24 VAC ONLY.
A3 TERMINAL AVAILABLE ON Q7300A,B,D,E, AND G MODELS ONLY.
M4411
33 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 36—T7300/Q7300A,B with economizer package in 1-stage cool system defeating economizer minimum position during unoccupied period with differential enthalpy changeover using W7459A/C7400 with M7415
Actuator.
OUTDOOR
AIR ENTHALPY
SENSOR
C7400
RETURN AIR
ENTHALPY
SENSOR
C7400
+
S
+
S
C7150B MIXED
OR DISCHARGE
AIR SENSOR
W7459A ECONOMIZER PACKAGE
SO
SR
TR TR1
+
+
5
1
2
3
4
T T1
P
P1
1K
4
2K
18
1S1
3
MINIMUM POSITION
ADJUSTMENT
M7415 ACTUATOR
TR
TR1
T
T1
P1
P
A1
A2
X C
Y1
W
Y1
COOL 1
Y2
R
T6301 AMBIENT
LOCKOUT CONTROL
Y2
W2
W2
HEAT 2
W1
W1
HEAT 1
G
3
4
1
2
5
RH
G FAN
RC
5
R
T7300/Q7300
HVAC EQUIPMENT
TERMINAL STRIP
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
L1
(HOT)
L2
1
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
FIELD INSTALLED JUMPER.
M4393
63-4038—7 34
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 37—T7300/Q7300 with economizer package in 1-stage cool system defeating economizer minimum position during unoccupied period with single enthalpy changeover using W7459A/C7400 with M7415
Actuator.
W7459A ECONOMIZER PACKAGE
M7415 ACTUATOR
TR
TR1
ENTHALPY
SENSOR
C7400
5
+
S
620 OHM
RESISTOR
C7150B MIXED
OR DISCHARGE
AIR SENSOR
SO
SR
TR TR1
+
+
5
1
2
3
4
T T1
P
P1
1K
4
2K
18
1S1
3
MINIMUM POSITION
ADJUSTMENT
P1
P
T
T1
A1
A2
24 VAC
TR
TR1
SENSOR
T1
T
MIN
POS
P1
P
X C
Y1
Y2
W
R
T6301 AMBIENT
LOCKOUT
CONTROL
Y1
COOL 1
M7415
W2 W2
HEAT 2
W1
W1
HEAT 1
G
G FAN
3
4
1
2
5
6
RH
RC
6
R
T7300/Q7300
HVAC EQUIPMENT
TERMINAL STRIP
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
L1
(HOT)
L2
1
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
1S, AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
FIELD INSTALLED JUMPER.
M4394
35 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 38—T7300/Q7300C with 2-stage heat/1-stage cool heat pump system using O or B terminal for reversing valve.
T7300
THERMOSTAT
H1/C1
AUX HT
FAN
Q7300 HEAT PUMP SUBBASE
CO HT
CO CL
EM.HT.
LED (RED)
AUX. HT.
LED (RED)
R
X
B
O
E
2
EXISTING HVAC EQUIPMENT
HVAC EQUIPMENT
TERMINAL STRIP
R
1
SYSTEM
TRANSFORMER
L1
(HOT)
L2
C
B
(IF NO "C" TERMINAL)
REV.
VALVE
O
SYSTEM
SWITCH
EM. HT
HEAT
OFF
COOL
AUTO
E
EM. HT.
RELAY
Y1
W1
G
Y
W1
G
COMP.
AUXILIARY
HEAT
FAN
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA1
CA2
CA3
CA4
COM
LED1
LED2
3
L1
(HOT)
L2
1
FAN SWITCH
ON
AUTO
CA5
T
T
A1
A2
3
ECONOMIZER
AUXILIARY
RELAY
CONTACT
1
2
3
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
WIRE O TO REVERSING VALVE FOR COOLING CHANGEOVER. WIRE B TO REVERSING VALVE FOR HEATING CHANGEOVER.
24 VAC ONLY.
M4399
63-4038—7 36
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 39—T7300/Q7300D with 2-stage heat/1-stage cool heat pump system.
T7300
THERMOSTAT
Q7300 HEAT PUMP SUBBASE
EXISTING HVAC EQUIPMENT
AUX. HT
FAN
H1/C1
R
X
HVAC EQUIPMENT
TERMINAL STRIP
R
SYSTEM
TRANSFORMER
SYSTEM
SWITCH
EM. HT
HEAT
OFF
COOL
AUTO
EM. HT.
LED (RED)
AUX. HT.
LED (RED)
E
C
E
W3
(IF NO "C" TERMINAL)
EM. HT.
RELAY
AUXILIARY
HEAT 1
W3
G
G
FAN
Y1
COOL 1
C/O CL
Y1
2
REV.
VALVE
C/O HT
W1 W1
HEAT 1
CA1
COM
L1
(HOT)
T7147
REMOTE
COMFORT
ADJUST
MODULE
1
CA2
CA3
CA4
LED1
LED2
3
L2
1
CA5
A1
T
3 ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
3
FAN SWITCH
ON
AUTO
REVERSING VALVE MAY BE SWITCHED FROM Y1 TO W1, OR FROM AN INTERNAL EQUIPMENT CONTROLLER, DEPENDING ON
MANUFACTURER AND SYSTEM.
24 VAC ONLY.
M4398
1
L1
(HOT)
L2
37 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 40—T7300/Q7300C with 2-stage heat/2-stage cool heat pump system using O or B terminal for reversing valve.
T7300
THERMOSTAT
H1/C1
AUX HT
FAN
Q7300 HEAT PUMP SUBBASE
EXISTING HVAC EQUIPMENT
HVAC EQUIPMENT
TERMINAL STRIP
R
1
SYSTEM
TRANSFORMER
L1
(HOT)
L2
CO HT
CO CL
EM. HT.
LE D(RED)
AUX. HT.
LED (RED)
R
X
B
O
E
2
C
(IF NO "C" TERMINAL)
SYSTEM
SWITCH
EM. HT
HEAT
OFF
COOL
AUTO
B
O
E
REV.
VALVE
EM. HT.
RELAY
Y1
Y2
COMP. 1
COMP. 2
C2
Y1
Y2
W1
W1
AUXILIARY
HEAT 1
FAN
G
G
1
2
3
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA1
CA2
CA3
CA4
COM
LED1
LED2
3
L1
(HOT)
1
L2
FAN SWITCH
ON
AUTO
CA5
T
A1
3 ECONOMIZER
A2
T
AUXILIARY
RELAY
CONTACT
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
WIRE O TO REVERSING VALVE FOR COOLING CHANGEOVER. WIRE B TO REVERSING VALVE FOR HEATING CHANGEOVER.
24 VAC ONLY.
M4400
63-4038—7 38
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 41—T7300/Q7300D with 3-stage heat/2-stage cool heat pump system.
T7300
THERMOSTAT
Q7300 HEAT PUMP SUBBASE
EXISTING HVAC EQUIPMENT
H3
FAN
H1/C1
R
X
HVAC EQUPIMENT
TERMINAL STRIP
R
SYSTEM
TRANSFORMER
SYSTEM
SWITCH
EM. HT
HEAT
OFF
COOL
AUTO
EM. HT.
LED (RED)
AUX. HT.
LED (RED)
E
C
E
(IF NO "C" TERMINAL)
EM. HT.
RELAY
W3 W3
AUXILIARY
HEAT 1
FAN
G G
C2
CO CL
Y1 Y1
COOL 1
CO CL
Y2
Y2
2
COOL 2
REV.
VALVE
CO HT
W1
W1 HEAT 1
CO HT
W2
W2
HEAT 2
CA1
COM
L1
(HOT)
T7147
REMOTE
COMFORT
ADJUST
MODULE
1
CA2
CA3
CA4
LED1
LED2
3
L2
1
CA5
A1
T
3 ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
3
FAN SWITCH
ON
AUTO
REVERSING VALVE MAY BE SWITCHED FROM Y1 TO W1, OR FROM AN INTERNAL EQUIPMENT CONTROLLER, DEPENDING ON
MANUFACTURER AND SYSTEM.
24 VAC ONLY.
M4397
1
L1
(HOT)
L2
39 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 42—T7300/Q7300C,D with economizer package in 2-stage heat/1 stage cool heat pump system defeating economizer minimum position during unoccupied period.
T7300
THERMOSTAT
C1
H1
FAN
AUXILIARY
RELAY
CONTACTS
SYSTEM
SWITCH
Q7300 HEAT PUMP SUBBASE
EXISTING HVAC EQUIPMENT
2
1
L1
(HOT)
L2
HVAC EQUPIMENT
TERMINAL STRIP
R
R
X
1 2
3
3K
A1
7
A2
A3
6
COM
LED1
LED2
CO
CO
B
RED
RED
O
E
EM. HT
HEAT
OFF
COOL
AUTO
C
7K
4
4 5
5K
G
O
FAN
RELAY
REV.
VALVE
4K
4
W1
Y
4K1
AUXILIARY
HEAT 1
COMP
4K2
Y1
5K1
W1 4
3K1
G
EXISTING ECONOMIZER CONTROL PACKAGE
MODUTROL
MOTOR
B1
MIXED AIR
TEMPERATURE
CONTROLLER
BLUE
W
R
RISE
W1
B
BLACK
1K1 1K2
R1
YELLOW
OUTDOOR AIR
CHANGEOVER
SWITCH
T2
T1
W
R
OPEN
B
1K
MINIMUM POSITION
POTENTIOMETER
4K
4
1
L1
(HOT)
L2
5K1
RED VIOLET
6
7
4
5
1
VIOLET
4K1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED. 24 VAC SECONDARY.
2
3
MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF
THERMOSTAT AND SUBBASE.
ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY
RISE AND 2-3 ON ENTHALPY FALL.
RELAY REQUIRED (R8222 OR SIMILAR).
ECONOMIZER MOTOR SPRING RETURNS CLOSED ANYTIME
FAN IS NOT RUNNING.
24 VAC ONLY.
A3 TERMINAL AVAILABLE ON Q7300D MODEL ONLY.
M4412
63-4038—7 40
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 43—T7300/Q7300F for 1-stage heat pump.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
RH
RC
X
2
HVAC EQUIPMENT
TERMINAL STRIP
R
C
Y
SYSTEM
TRANSFORMER
L1
(HOT)
L2
1
(IF NO "C" TERMINAL)
COMP. 1
C1
AUX.
HT.
FAN
O
Y1
W1
G
G
O
T7147
REMOTE
COMFORT
ADJUST
MODULE
CA1
CA2
CA3
CA4
CA5
T
T
K2 (AUX)
AUXILIARY
RELAY
CONTACT
COM
LED1
LED2
3
A1
A2
3
ECONOMIZER
L1
(HOT)
L2
1
1
2
3
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
24 VAC ONLY.
COOL
FAN
CHANGEOVER
M4419
41 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 44—T7300/Q7300F for 1-stage heat/1-stage cool and 2-stage heat/1-stage cool heat pumps.
T7300
THERMOSTAT
Q7300 SUBBASE EXISTING HVAC EQUIPMENT
H1/C1
AUX. HT.
FAN
T7147
REMOTE
COMFORT
ADJUST
MODULE
4
CA4
CA5
T
T
CA1
CA2
CA3
AUXILIARY
RELAY
CONTACT
C2
O
B
RH
2
RC
X
Y2
Y1
Y3
AUX. HT.
LED (GREEN)
W1
G
COM
LED1
LED2
A1
A2
3
3
ECONOMIZER
HVAC EQUIPMENT
TERMINAL STRIP
R
X
Y1
4
Y2
O
SYSTEM
TRANSFORMER
L1
(HOT)
L2
1
COMP. 1
COMP. 2
COOL
CHANGEOVER
B
W1
G
AUX. HEAT
FAN
L1
(HOT)
L2
1
1
2
3
4
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
FIELD INSTALLED JUMPER.
24 VAC ONLY.
AVAILABLE ON Q7300F1017 AND Q7300F1033 ONLY.
M4420
63-4038—7 42
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 45—Q7300L for 2-stage heating with three-position ML984A actuator/V50B valve and 1-stage cooling.
T7300
THERMOSTAT
Q7300L
L1
EXISTING HVAC EQUIPMENT
(HOT)
L2
2
1
L1
(HOT)
L2
1
R
C
H
FAN
HEAT
LED
COOL
LED
1K RELAY
2K RELAY
3K RELAY
4K1
1K1
2K1
2K2
Y
FC
COOLING
RELAY
LOW SPEED
FAN RELAY
GL
3
GH
HIGH SPEED
FAN RELAY
RM
3K1
BM
MICROPROCESSOR
CONTROL
POWER
SUPPLY
COMMUNICATION
COMMUNICATION
LINES
FAN
ON
AUTO
SUBBASE RELAY
CONTROL AND
COMMUNICATION
(INCLUDES 4K
AND 5K RELAYS)
5K1
X
A1
A2
P1
3K2
P2
AUTO
SYSTEM
SWITCHING
CA1
CA2
CA3
CA4
CA5
T
T
CA1
CA2
CA3
5
CA4
CA5
T7147A
REMOTE
SENSOR
AND
OVERRIDE
MODULE
T
T
RS1
RS2
3
4
1
2
5
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
INDEPENDENT FAN TRANSFORMER OPTIONAL. IF SINGLE TRANSFORMER IS USED, JUMPER FC TO R.
FOR SINGLE SPEED FAN, JUMPER GL AND GH.
180
Ω
2W RESISTOR MUST BE INSTALLED AS SHOWN.
REFER TO T7147 INSTRUCTIONS FOR APPROPRIATE CA TERMINAL CONNECTIONS. T7047 HAS T-T TERMINALS ONLY.
ML984A VALVE
ACTUATOR
R1
T5
B3
T6
180
Ω
2W
W
4
DAMPER
CONTROL RELAY
PUMP
INTERLOCK RELAY
M4377
43 63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 46—Q7300L for single-stage conventional heating systems with single-stage cooling.
T7300
THERMOSTAT
Q7300L
EXISTING HVAC EQUIPMENT
L1
(HOT)
L2
1
R
C
H
FAN
COOL
LED
1K RELAY
2K RELAY
Y
1K1
FC
2K1
GL
2K2
GH
RM
4K1
3K1
BM
2
LOW SPEED
FAN RELAY
HIGH SPEED
FAN RELAY
COOLING
RELAY
MICROPROCESSOR
CONTROL
POWER
SUPPLY
COMMUNICATION
HEAT
LED
COMMUNICATION
LINES
RS1
RS2
3K RELAY
FAN
ON
AUTO
SUBBASE RELAY
CONTROL AND
COMMUNICATION
(INCLUDES 4K
AND 5K RELAYS)
X
5K1
A1
A2
3K2
P1
P2
AUTO
SYSTEM
SWITCHING
CA1
CA2
CA3
CA4
CA5
T
T
CA1
CA2
CA3
3
CA4
CA5
T7147A
REMOTE
SENSOR
AND
OVERRIDE
MODULE
T
T
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
FOR SINGLE SPEED FAN JUMPER GL AND GH.
REFER TO T7147 INSTRUCTIONS FOR APPROPRIATE CA TERMINAL CONNECTIONS. T7407 HAS T-T TERMINALS ONLY.
DAMPER
CONTROL RELAY
HEAT RELAY
M4378
63-4038—7 44
T7200/T7300/Q7300
TROUBLESHOOTING
Refer to Figs. 47 and 48 to troubleshoot problems with the thermostat and system.
Troubleshooting
Fig. 47—Troubleshooting chart to quickly isolate a display or fan problem.
SYMPTON
LCD TEMPERATURE
DISPLAY IS --°.
LCD IS BLANK.
ALL SEGMENTS OF
LCD ARE DISPLAYED.
BATT DISPLAYED ON
LOWER RIGHT LCD.
LCD DISPLAYS ----.
LCD HAS ONLY
PARTIAL DISPLAY.
FAN DOES NOT RUN.
POSSIBLE CAUSE
Q7300 SWITCH 5 INCORRECTLY SET.
INCOMPLETE CIRCUIT.
NO ac VOLTAGE TO THERMOSTAT.
THERMOSTAT IS IN TEST MODE.
THERMOSTAT HAS DETECTED LOW
BATTERY VOLTAGE.
THERMOSTAT HAS NO PROGRAM.
FAULTY THERMOSTAT.
Q7300 SWITCH 4 INCORRECTLY SET.
ACTION
•
SYSTEM WITHOUT REMOTE SENSOR: CHECK THAT SWITCH 5
•
IS IN ON POSITION.
SYSTEM WITH REMOTE SENSOR: CHECK THAT SWITCH 5 IS
IN OFF POSITION.
CHECK WIRING FOR SHORTS OR OPENS
BETWEEN THERMOSTAT AND REMOTE SENSOR.
CHECK POWER TO FURNACE OR AIR CONDITIONER.
• ON-OFF SWITCH
• FUSE OR CIRCUIT BREAKER
• LOOSE 24 VAC CONNECTION
—AT THERMOSTAT
—AT FURNACE/AIR CONDITIONER
• INCORRECT WIRING
—CHECK WIRING DIAGRAM
CHECK VOLTAGE AT SUBBASE.
• 20 TO 30 VOLTS BETWEEN PINS 1 AND 6 ON Q7300 9 PIN
CONNECTOR (SEE FIG. 34).
—REPLACE Q7300 IF NO VAC.
—REPLACE THERMOSTAT IF VAC PRESENT.
PRESS CLOCK AND DAY KEYS AT THE SAME TIME. REPLACE
THERMOSTAT IF REPEATED ATTEMPTS FAIL.
• CHECK BATTERY CONNECTIONS.
• REPLACE BATTERY.
• CHECK BATTERY (7.5 VDC).
• CHECK BATTERY CONNECTIONS.
• REPROGRAM THERMOSTAT.
• CHECK OPERATION. IF BATTERY OK AND THERMOSTAT LOOSES
PROGRAM, REPLACE THERMOSTAT.
REPLACE T7300.
FAN DOES NOT
STOP.
INOPERATIVE THERMOSTAT.
HVAC SYSTEM OR THERMOSTAT
PROBLEM.
•
SET SWITCH 4 TO ON WHEN THERMOSTAT IS NOT REQUIRED
•
TO TURN ON FAN IN HEATING.
SET SWITCH 4 TO OFF WHEN THERMOSTAT IS REQUIRED TO
TURN ON THE FAN IN HEATING.
CHECK FAN OPERATION:
• SET FAN SWITCH TO ON.
• SYSTEM SWITCH TO AUTO.
• PRESS 3 HOUR OCCUPIED KEY.
• WAIT AS LONG AS FIVE MINUTES AND FAN SHOULD START.
FAN STILL DOES NOT RUN:
• USE OHM METER TO CHECK FOR CONTINUITY BETWEEN RC
AND G ON THE SUBBASE.
—IF ZERO, PROBLEM IS IN HVAC UNIT CONTROL SYSTEM.
•• CHECK FAN CONTROL RELAY CIRCUITS.
—IF NOT ZERO, REPLACE THERMOSTAT.
REMOVE WIRE FROM G TERMINAL.
• IF FAN KEEPS RUNNING:
—CHECK HVAC CONTROL WIRING.
—CHECK FOR LATCHED FAN CONTACTOR, RELAY OR PLENUM
SWITCH.
• IF FAN STOPS RUNNING:
—PRESS CONT UNOC KEY.
—CHECK THAT ROOM TEMPERATURE IS BETWEEN UNOC
HEATING AND COOLING SETPOINTS.
—WAIT FIVE MINUTES.
•• IF FAN KEEPS RUNNING, REPLACE THERMOSTAT.
•• IF FAN STOPS RUNNING, THERMOSTAT AND HVAC
SYSTEM ARE OK.
M4416
45 63-4038—7
T7200/T7300/Q7300
TROUBLESHOOTING
Fig. 48—Troubleshooting chart to quickly isolate a HVAC problem.
SYMPTON
HVAC WILL NOT
OPERATE.
POSSIBLE CAUSE
NO ac VOLTAGE TO THERMOSTAT.
HEATING SYSTEM WILL NOT
TURN ON.
HEATING SYSTEM WILL NOT
TURN OFF.
COOLING SYSTEM WILL NOT
TURN ON.
COOLING SYSTEM WILL NOT
TURN OFF.
ACTION
CHECK POWER TO FURNACE OR AIR CONDITIONER.
• ON-OFF SWITCH
• FUSE OR CIRCUIT BREAKER
• LOOSE 24 VAC CONNECTION
—AT THERMOSTAT
—AT FURNACE/AIR CONDITIONER
• INCORRECT WIRING
—CHECK WIRING DIAGRAM
CHECK VOLTAGE AT SUBBASE.
• 20 TO 30 VOLTS BETWEEN PINS 1 AND 6 ON Q7300 9 PIN
CONNECTOR (SEE FIG. 34).
—REPLACE Q7300 IF NO VAC.
—REPLACE THERMOSTAT IF VAC PRESENT.
CHECK HEATING SYSTEM:
• WAIT MINIMUM OFF TIME (2 MIN. OR 4 MIN. FOR HEAT PUMP).
• JUMPER RH TO W1 (R TO Y1 IF HEAT PUMP) AT THERMOSTAT
OR EQUIPMENT TERMINAL STRIP.
—NO HEAT, THERMOSTAT OK, CHECK HEATING SYSTEM.
—HEAT COMES ON, HEATING SYSTEM, CHECK THERMOSTAT.
THERMOSTAT CHECKOUT:
• SET SYSTEM SWITCH TO HEAT OR AUTO.
• SPACE TEMPERATURE IS LOWER THAN HEAT SETPOINT (IF
NOT, RAISE HEAT SETPOINT TO 5°F ABOVE SPACE TEMPER-
TURE).
—HEAT COMES ON, THERMOSTAT AND HEATING SYSTEM OK.
—NO HEAT, REPLACE THERMOSTAT.
•• HEAT ON, THERMOSTAT AND HEATING SYSTEM OK.
•• NO HEAT, REPLACE Q7300.
CHECK HEATING SYSTEM:
• WAIT MINIMUM ON TIME (2 MIN. OR 4 MIN. FOR HEAT PUMP).
• REMOVE RH (R IF HEAT PUMP) WIRE FROM TERMINAL.
—HEAT STAYS ON, THERMOSTAT OK, CHECK HEATING SYSTEM.
—HEAT STOPS, HEATING SYSTEM OK, CHECK THERMOSTAT.
THERMOSTAT CHECKOUT:
• SET SYSTEM SWITCH TO HEAT OR AUTO.
• SPACE TEMPERATURE IS HIGHER THAN HEAT SETPOINT (IF
NOT, LOWER HEAT SETPOINT TO 5°F BELOW SPACE TEMPER-
TURE).
—HEAT TURNS OFF, THERMOSTAT AND HEATING SYSTEM OK.
—HEAT STILL ON, REPLACE THERMOSTAT.
•• HEAT TURNS OFF, THERMOSTAT AND HEATING SYSTEM OK.
•• HEAT ON, REPLACE Q7300.
CHECK COOLING SYSTEM:
• WAIT MINIMUM 4 MIN. OFF TIME.
• JUMPER RC (R IF HEAT PUMP) TO Y1 AT THERMOSTAT OR
EQUIPMENT TERMINAL STRIP.
—COOL OFF, THERMOSTAT OK, CHECK COOLING SYSTEM.
—COOL ON, COOLING SYSTEM OK, CHECK THERMOSTAT.
THERMOSTAT CHECKOUT:
• SET SYSTEM SWITCH TO COOL OR AUTO.
• SPACE TEMPERATURE IS HIGHER THAN COOL SETPOINT (IF
NOT, LOWER COOL SETPOINT TO 5°F BELOW SPACE TEMPER-
TURE).
—COOL COMES ON, THERMOSTAT AND COOLING SYSTEM OK.
—NO COOL, REPLACE THERMOSTAT.
•• COOL ON, THERMOSTAT AND COOLING SYSTEM OK.
•• COOL TURNS OFF, REPLACE Q7300.
CHECK COOLING SYSTEM:
• WAIT MINIMUM 2 MIN. ON TIME.
• REMOVE RC (R IF HEAT PUMP) WIRE FROM TERMINAL.
—COOL ON, THERMOSTAT OK, CHECK COOLING SYSTEM.
—COOL OFF, COOLING SYSTEM OK, CHECK THERMOSTAT.
THERMOSTAT CHECKOUT:
• SET SYSTEM SWITCH TO COOL OR AUTO.
• SPACE TEMPERATURE IS LOWER THAN COOL SETPOINT (IF
NOT, RAISE COOL SETPOINT TO 5°F ABOVE SPACE TEMPER-
TURE).
—COOL TURNS OFF, THERMOSTAT AND COOLING SYSTEM OK.
—COOL STILL ON, REPLACE THERMOSTAT.
•• COOL TURNS OFF, THERMOSTAT AND COOLING SYSTEM OK.
•• COOL ON, REPLACE Q7300.
M4417
63-4038—7 46
47 63-4038—7
FOR CANADIAN EMI REGULATIONS
Class B
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the
Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la Class B prescrites dans le Réglement sur le brouillage radioélectrique édicté par le ministère des
Communications du Canada.
Home and Building Control
Honeywell Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Home and Building Control
Honeywell Limited—Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 2C9
48
Helping You Control Your World
www.honeywell.com/building/components
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