63-4038 - T7200, T7300 and Q7300 Programmable

63-4038 - T7200, T7300 and Q7300 Programmable
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.
■ Use with Q7300 to interface with C7400/W7459
Economizer System for total integration of rooftop
control.
■ 7-day programming—two occupied/unoccupied
periods per day.
■ Convenient overrides allow temporary changes.
■ Individual temperature setpoints for:
—Occupied heat and cool.
—Unoccupied heat and cool.
■ Battery backup saves program and maintains clock
time during power failure.
■ Auxiliary contacts available for use with economizer.
■ Proportional plus integral control—eliminates temperature fluctuations and thermostat tampering.
■ Intelligent Recovery™—automatically optimizes
start time depending on building load.
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
■ 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.
J. A. • Rev. 12-95 •
M3375
• ©Honeywell Inc. 1995
1
63-4038—7
63-4038-7
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
Q7300Aa,b
Q7300B
Q7300C
System Switch
None
Heat-Off-Cool-Auto
Em. Ht.-Heat-OffCool-Auto
Q7300D
Q7300E
Q7300F
None
Q7300G
Heat-Off-Cool-Auto
Q7300L
None
Fan
Switch
None
Auto-On
LEDs
None
Application
Conventional
Em. Ht., 1 stage heat pump compressor with
Aux. Ht. 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 heatc
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
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.
b Q7300A1000 model configures for 1 heat-1 cool only (fixed).
c 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.
3. Order additional system components and system accessories
2. Accessories, if desired.
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.
Fig. 1—Thermostat and subbase dimensions in
in. (mm).
1-3/4
(41)
8 (204)
TABLE 2—MAXIMUM AMPS AT 30 VAC.
Relay
Fan
Heat
Cool
Auxillary (Economizer)
Running (A)
1.6
1.6
1.6
1.6
1
Inrush (A)
3.5
3.5
7.5
3.5
4
(102)
4-5/8
(118)
EM. HEAT AUX. HEAT
FAN
AUTO
1
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.
ON
EM. HEAT HEAT OFF COOL
M4404
T7300/Q7300 ONLY.
Fig. 2—T7300B door.
OCCUPIED •
UNOCCUPIED •
CONT UNOC •
3 HR OCCUPIED •
ENVIRONMENTAL
CONTROL
3 HOUR
OCCUPIED
TABLE 3—DEFAULT SETPOINTS.
Control
Heating
Cooling
Occupied
68°F (20°C)
78°F (26°C)
Unoccupied
55°F (13°C)
90°F (32°C)
M4421
Fig. 3—T7300C door.
REMOTE SENSOR WIRING TEMPERATURE OFFSET:
Temperature offset occurs with 500 ft (157m) to 1000 ft
(305m) of 2-wire cable. See Table 4.
OCCUPIED •
Temperature
Range
50-90°F
10-32°C
ENVIRONMENTAL
CONTROL
UNOCCUPIED •
TABLE 4—TEMPERATURE OFFSET.
SET
18 AWG
-0.4°F
-0.3°C
20 AWG
-0.7°F
-0.4°C
TO ADJUST HEAT
PRESS SET HEAT THEN
PRESS WARMER OR COOLER
22 AWG
-1.0°F
-0.6°C
HEAT
SET
WARMER
COOL
TO ADJUST COOLING
PRESS SET COOL THEN
PRESS WARMER OR COOLER
FOR AFTER HOURS
PRESS OCCUPIED UNOCCUPIED
FOR BUSINESS HOURS
PRESS OCCUPIED UNOCCUPIED AGAIN
OCCUPIED
COOLER
UNOCCUPIED
TO ACCESS FULLY PROGRAMMABLE TIME AND TEMPERATURE FEATURES LIFT COVER
M4422
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).
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.
M3375
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
Recycling Notice
this control, or of an old control containing mercury in a
sealed tube.
Installation
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.
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.
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.
63-4038—7
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.
4
T7200/T7300/Q7300
INSTALLATION
Fig. 4—Location for installing thermostat or remote-mounted sensor.
YES
NO
NO
5 FEET
[1.5 METERS]
NO
M4385
Fig. 7—Four T7047C1025 Sensors providing a
temperature averaging network for a T7300/
Q7300 Thermostat /Subbase.
Fig. 5—Two T7047G1000 Sensors providing a
temperature averaging network for a T7300/
Q7300 Thermostat/Subbase.
Q7300
T
T
Q7300
T7047G1000
T7047G1000
T
T
T
T
T7047C
T
T7047C
T
T
T
T
T
M3421
Fig. 6—Two T7047C1025 and one T7047G1000
Sensors providing a temperature averaging
network for a T7300/Q7300 Thermostat/Subbase.
T7047C
T
T7047C
T
T
T
Q7300
T
T
M3420
T7047C
T
T
T7047G1000
T
T7047C
T
T
T
M3418
5
63-4038—7
T7200/T7300/Q7300
INSTALLATION
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.
Fig. 8—Five T7047G1000 Sensors providing a
temperature averaging network for a T7300/
Q7300 Thermostat/Subbase.
Q7300
T
T
T7047G
T
T7047G
T7047G
T
T
T
T
T7047G
T
T7047G
T
T
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.
T
T
SET Q7300 SUBBASE DIP SWITCHES
M3422
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.
Fig. 9—Nine T7047C1025 Sensors providing a
temperature averaging network for a T7300/
Q7300 Thermostat/Subbase.
TABLE 5—SUBBASE DIP SWITCH SETTINGS.
Q7300
T
T7047C
T
T
T7047C
T
T
Switch
1a
T7047C
T
T
2a
T
3
T7047C
T
T7047C
T
T
T7047C
T
T
4c
T
5
T7047C
T
T7047C
T
T
T7047C
T
T
ONb
OFF
ONb
OFF
Function
1 stage heat
2 stage heat
1 stage cool
2 stage cool
Proportional control (allows droop)
Proportional plus integral (P+I)
control (droopless)
Energizes fan on cool only
Energizes fan on heat and cool
Use internal sensor
Use remote sensor
a
No effect on 1 heat/1 cool (Q7300A) or 1 heat/3 cool
(Q7300G) models.
b Factory setting.
c No effect on heat pump systems.
T
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.
M3419
63-4038—7
Setting
OFF
ONb
OFF
ONb
OFF
ONb
6
T7200/T7300/Q7300
INSTALLATION
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.
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.
Fig. 10—Setting subbase DIP switches.
B
A3
Y1
G
RC
A2
A1
RH
CA1
W2
CA2
Y2
CA3
T
CA4
1
T
O
N
1
2
3
4
5
CA5
LED1 LED2 COM
1
CONFIGURATION OF ILLUSTRATED SWITCH IS:
1 – ON
2 – OFF
3 – OFF
4 – ON
5 – ON
M4401
Fig. 11—Installing subbase on outlet box or on wall.
B
Y1
A3
G
RC
RH
A2
A1
W2
Y2
T
T
CA1
CA2
CA3
CA4
CA5
OR
LED1 LED2 COM
SHEET METAL
SCREWS
B
A3
A2
A1
W2
Y2
T
T
CA1
CA2
CA3
CA4
CA5
MOUNTING TO WALL BOARD
Y1
G
RC
RH
LED1 LED2 COM
M4410
MACHINE
SCREWS
MOUNTING TO HORIZONTAL 2 X 4 JUNCTION BOX
7
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.
CAUTION
Never install more than one wire per terminal
unless using factory-supplied jumper with spade
terminal.
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.
Fig. 12—Barrier configuration. Keep wiring
restricted to recessed area surrounding terminals.
FOR STRAIGHT
INSERTION –
STRIP 5/16 in. [8 mm]
CAUTION
Disconnect power supply before beginning installation to prevent electrical shock or equipment
damage.
FRONT VIEW OF
TERMINAL AREA
All wiring must comply with local electrical codes and
ordinances.
WIRING TO BE BELOW
THIS SURFACE
IMPORTANT: Use 18 gauge, solid-conductor wire whenever possible. If using 18 gauge stranded wire, no
more than 10 wires can be used. Do not use larger
than 18 gauge wire.
TOP SURFACE
OF SUBBASE
CROSS-SECTIONAL VIEW OF
TERMINAL AREA
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.
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.
NOTE: If a remote sensor is used, be sure that the Q7300 DIP
switch 5 is placed in the OFF position.
63-4038—7
FOR WRAPAROUND –
STRIP 7/16 in. [11 mm]
RESTRICT
WIRING TO
THIS AREA
8
T7200/T7300/Q7300
INSTALLATION
TABLE 6—TERMINAL DESIGNATIONS.
Standard
Terminal
Designation
B
E
G
O
R
RC
RH
W1
W2
W3
Y1
Y2
Y3a
X
T
LED1,
LED2, COM
Y
A1, A2, A3
CA1-CA5
Alternate
Designations Or
Customer Specials
K
F
R
V
H1, R3
H2, Y, R4
C1, M
C2
X1,X2,C
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 controla
Common connection
T
R1, R2
RS
M
Input
Input
Output
Output
Output
Output
Output
Output
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
Input
Input
Remote sensorb
L, C, H
O
A,A1,A2,Z,C,L
Function
Output
Output
Output
Output
Input
HSII control panel
Momentary circuit, changeover
LEDs
Annunciation
External temperature readout, T relay
LO and HI speed fan relays
Cooling contactor
Compressor contactor
Auxiliary relay
Remote overrideb
Output
Input
Dry contact
Low power
a Q7300G only.
b 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.
TABLE 7—THERMOSTAT DIP SWITCH SETTINGS
Switch Setting
Function
a
1
ON °F display
OFF °C display
2
ONa 12 hour clock display
OFF 24 hour clock display
3
ONa,b Intermittent fan operation in occupied
period
OFF Continuous fan operation in occupied
period
4
Nonfunctional switch
a
5
ON Keyboard is used for programming
OFF Keyboard disabled, but can be used to
review program, perform overrides
and make clock changes.
IMPORTANT: The thermostat configuration must match
the application, or the control logic will not function
properly.
a Factory setting.
b 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
1
2
- KEYBD
45
INT - FAN
ON
5
3
4
5
OFF
°C
OFF
24
°C
4
12 HR. TIME
3
°F - TEMP
90
2
24
CON
45
1
ON - KEYBD
INT - FAN
ON
CON
12 HR. TIME
CONV
°F - TEMP
HEAT PUMP
M4085A
Fig. 14—Setting thermostat mini-jumper for conventional or heat pump system.
T7300 ONLY
1
2
ON - KEYBD
INT - FAN
5
12 HR. TIME
4
°F - TEMP
ON - KEYBD
3
OFF
INT - FAN
90
2
24
45
1
°C
ON
CON
12 HR. TIME
CONV
°F - TEMP
HEAT PUMP
90
1
ONLY PUT MINI-JUMPER IN THIS POSITION WHEN USING Q7300C,D, OR F SUBBASES.
2
ONLY PUT MINI-JUMPER IN THIS POSITION WHEN USING Q7300A,B,E, OR G SUBBASES.
63-4038—7
10
M4086A
T7200/T7300/Q7300
INSTALLATION
SET THERMOSTAT MINI-JUMPER
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: 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.
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.
MOUNT THERMOSTAT
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.
CAUTION
Always disconnect power supply and remove battery from the T7300 before connecting the ribbon
cables to prevent electrical shock and equipment
damage.
Fig. 16—Installing optional 9 volt battery.
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.
STEP 1: CONNECT THERMOSTAT
CABLES TO THE SUBBASE.
FIRST CONNECT THE 12 PIN
THEN THE 9 PIN.
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.
BATTERY
SNAPS
STEP 3: SLIDE BATTERY UP TO THE
BATTERY CONNECTOR
UNTIL CONNECTED.
M4408
Fig. 15—Connecting the pin ribbon cables to the
subbase connectors.
9-PIN SUBBASE
CONNECTOR
STEP 2: SNAP BATTERY INTO PLACE.
Fig. 17—Mounting thermostat on subbase.
12-PIN SUBBASE
CONNECTOR
1
1
DO NOT OVERTIGHTEN SCREWS
M4391
M4403
11
63-4038—7
T7200/T7300/Q7300
PROGRAM THE THERMOSTAT
Program the Thermostat
NOTE: The programming times are in intervals of ten
minutes; i.e., 8:00, 8:10, 8:20.
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.
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.
IMPORTANT: To program the thermostat, 24 Vac is required (turn on system power) and the keyboard lockout switch (see Fig. 27) must be in the ON-KEYBD
position.
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.
Fig. 18—Thermostat programming keys and
LCD display.
OCCUPIED •
UNOCCUPIED •
CONT UNOC •
3 HR OCCUPIED •
11:32
HEAT
AM
OVERRIDE
SET START TIME
SET TEMPERATURE
DATA CHANGE
CLOCK
SELECT OCCUPIED
DAY START TIME
OCCUPIED OCCUPIED
COOL
HEAT
DISPLAY
+
3 HOUR
OCCUPIED
DAY
UNOC
COPY START TIME
CLEAR
START TIME
–
CONT
UNOC
SET
UNOC
HEAT
UNOC
COOL
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.
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: 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.
NOTE: Su=Sunday; Mo=Monday; Tu=Tuesday; We=
Wednesday; Th=Thursday; Fr=Friday; Sa=Saturday.
SET PROGRAM TEMPERATURE SETPOINTS
SET PROGRAM TIMES
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.
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.
63-4038—7
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.
12
T7200/T7300/Q7300
PROGRAM THE THERMOSTAT • CHECKOUT
SET + OR - KEY VALUE
When using the + or - key with the 3 HOUR OCCUPIED 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.
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 (----).
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: 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.
NOTE: The program indicator will point to 3 HR OCCUPIED while the override is in effect. The LCD will not
reflect the key value.
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.
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.
NOTE: The program indicator will point to 3 HR OCCUPIED while the override is in effect.
3 Hour Occupied with + or - Key
Checkout
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).
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
NOTE: It is helpful to program the thermostat before using
the Checkout procedure. Refer to the Programming section to set a program.
13
63-4038—7
T7200/T7300/Q7300
CHECKOUT
COOL
Move switch to auto.
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.
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.
Fig. 19—All segments on display.
SU MO TU WE
COMM
AM HEAT
PM ● ● ●
COOL
TH FR SA BATT
TEST MODE
INDICATOR
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.
M4415
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.
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
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.
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.
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.
Fig. 20—Display when starting test sequence.
SU
COMM
AM HEAT
● ● ●
COOL
BATT
M4418
Subbase
NOTE: Subbase fan switch overrides the thermostat fan
switch.
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).
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.
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.
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.
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.
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.
Fig. 21—Proportional temperature control
versus P+I temperature control.
THERMOSTAT
COOL SETPOINT
PROPORTIONAL COOL
CONTROL POINT
TEMPERATURE
P+I CONTROL
POINT
P+I CONTROL POINT
PROPORTIONAL HEAT
CONTROL POINT
THERMOSTAT
HEAT SETPOINT
HEATING
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.
100
50
COOLING
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
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.
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).
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.
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).
TABLE 8—OPERATION OF THE Q7300
O AND B TERMINALS.
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.
System Switch
Heat
Cool
Auto (Heat)a
Auto (Cool) b
Emergency Heat
Off
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.
O
B
Closed
Open
Closed
Open
Closed
c
c
a
When the system is calling for heat or is de-energized, but
the last function was heat.
b When the system is calling for cool or is de-energized, but
the last function was cool.
c 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.
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.
63-4038—7
Open
Closed
Open
Closed
Open
16
T7200/T7300/Q7300
OPERATION
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.
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.
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.
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.
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
—
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.
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.
Fig. 22—Use of external relay and transformer
for auxiliary loads greater than 1.6A.
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
L1
L2
1
(HOT)
Q7300 SUBBASE
A1
TO
LOAD
A2
A3
3
AUXILIARY
RELAY
CONTACTS
2
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.
Trade
Replacement
Description
T7200A 7-day programmable thermostat for commercial conventional systems.
A1006 23,24,25 Tradeline®.
T7200A1006
A1022 23,24,25 International faceplate.
T7200A1006
T7200B
B1004
B1012
B1020
B1003
B1011
B1029
B1037
B1045
B1052
1
Beige color
Beige color
Premier White™ color
Beige color
Premier White™ color
Beige color
Premier White™ color
Beige color
Premier White™ color
Beige color
Premier White™ color
Beige color
Premier White™ color
Beige color
Premier White™ color
Beige color
Premier White™ color
Premier White™ color
Fully configurable programmable thermostat with 3-HOUR OVERRIDE key on cover. See figure 2
for view of door.
Tradeline.
T7300B1003 Beige color
1
Climate Control part no. 490249B-05.
T7300B1003 Beige color
1
T7300B1052 Premier White™ color
McQuay part no. 490249B-06.
T7300B1003 Beige color
1
T7300B1052 Premier White™ color
Arcoaire part no. 1506746. Used in Y7300B1024.
T7300B1003 Beige color
1
T7300B1052 Premier White™ color
Comfort Maker part no. 1505746. Used in
T7300B1003 Beige color
1
Y7300B1016.
T7300B1052 Premier White™ color
Tradeline.
T7300B1052 Premier White™ color
1
See subbase for figure number.
63-4038—7
Beige color
Beige color
7-day programmable thermostat for commercial water source heat pump systems.
9,26
Tradeline.
T7200B1004 Beige color
9,26
Mammoth part number 71116701.
T7200B1004 Beige color
9,26
Carrier part number HH07AX010A.
T7200B1004 Beige color
T7300A 7-day programmable thermostat for commercial conventional systems.
A1005 1
Tradeline®.
T7300A1005
A1013 1
York part no. 025-27506. Used in Y7300B1008,
T7300A1005
Y7300C1006 and Y7300D1004.
T7300A1104
A1021 1
Lennox part no. 81G5901.
T7300A1005
T7300A1104
A1039 1
Trane part no. THT-0608.
T7300A1005
T7300A1104
A1047 1
Micrometl part no. 901-114. Used in Y7300A1000
T7300A1005
and Y7300C11014.
T7300A1104
A1054 1
International face plate.
T7300A1005
T7300A1104
A1062 1
Carrier part no. HH07AX005. Used in Y7300A1018. T7300A1005
T7300A1104
A1070 1
International face plate.
T7300A1005
T7300A1104
A1088 1
Spanish face plate.
T7300A1005
T7300A1104
A1104 1
Tradeline.
T7300A1104
T7300B
Remarks
(Continued)
18
T7200/T7300/Q7300
CROSS REFERENCE
TABLE 10—THERMOSTAT AND SUBBASE CROSS REFERENCE (Continued).
Model
Number
Fig.
No.
Trade
Replacement
Description
Remarks
T7300C
Fully configurable programmable thermostat with limited access cover. See Figure 3 for view of
door.
C1001 1
Tradeline.
T7300C1001 Beige color
C1019 1
Tradeline. Premier White™ T7300.
T7300C1019 Premier White™ color
Subbase
Q7300A Conventional equipment. System: none. Fan: none.
A1000 27
Tradeline. 1 heat and 2 cool.
Q7300A1000 Brown color
A1018 28,29,
Tradeline. 2 heat and 2 cool.
Q7300A1018 Brown color
30,32,
35,36
A1034 27,32
Trane part no. BAS-0444.
Q7300A1000 Brown color
Q7300A1075 Light gray color
A1042 28,29,
Trane part no. BAS-0445.
Q7300A1018 Brown color
30,32,
Q7300A1083 Light gray color
35,36
A1059 28,29
Micrometl part no. 901-3. Used in Y7300A1000.
Q7300A1018 Brown color
30,32,
Q7300A1083 Light gray color
35,36
A1067 28,29,
Carrier part no. HH93AX005.
Q7300A1018 Brown color
30,32,
Q7300A1083 Light gray color
35,36
A1075 27,32
Tradeline. Used with Premier White™ T7300.
Q7300A1075 Light gray color
1 heat and 1 cool.
A1083 28,29,
Tradeline. Used with Premier White™ T7300.
Q7300A1083 Light gray color
30,32,
2 heat and 2 cool.
35,36
Q7300B Conventional equipment. System: Heat-Off-Cool-Auto. Fan: Auto-On.
B1008 28,29,
Tradeline. 2 heat and 2 cool.
Q7300B1008
30,32,
35,36
B1016 28,29,
Lennox part no. 81G6001.
Q7300B1008
30,32,
Q7300B1073
35,36
Q7300B1081
B1024 28,29,
York part no. 025-227507. Used in Y7300B1008.
Q7300B1008
30,32,
Q7300B1073
35,36
Q7300B1081
B1032 28,29,
Trane part no. BAS-0446.
Q7300B1008
30,32,
Q7300B1073
35,36
Q7300B1081
B1040 28,29,
Carrier part no. HH93AAX004.
Q7300B1008
30,32,
Q7300B1073
35,36
Q7300B1081
B1057 28,29,
Snyder General part no. 1520510. Used in
Q7300B1008
30,32,
Y7300B1016 and Y7300B10224.
Q7300B1073
35,36
Q7300B1081
B1065 28,29
Snyder General part no. 490249B-04.
Q7300B1008
30,32,
Q7300B1073
35,36
Q7300B1081
1
See subbase for figure number.
Brown color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
(Continued)
19
63-4038—7
T7200/T7300/Q7300
CROSS REFERENCE
TABLE 10—THERMOSTAT AND SUBBASE CROSS REFERENCE (Continued).
Model
Fig.
Trade
Number
No.
Description
Replacement
B1073 28,29,
Tradeline. 2 heat and 2 cool.
Q7300B1073
30,32,
35,36
B1081 28,29,
Tradeline. Used with Premier White T7300.
Q7300B1081
30,32,
2 heat and 2 cool.
35,36
Q7300C Heat pump systems. System: Em. Ht.-Heat-Off-Cool-Auto. Fan: Auto-On.
C1006 38,42
Tradeline. 1 stage heat pump.
Q7300C1006
C1014 40
Tradeline. 2 stage heat pump.
Q7300C1014
C1022 40
Lennox part no.81G6901.
Q7300C1014
Q7300C1089
Q7300C1105
C1030 40
York part no. 025-27508. Used in Y7300C1006.
Q7300C1014
Q7300C1089
Q7300C1105
C1048 38,42
Trane part no.BAS-0447.
Q7300C1014
Q7300C1089
Q7300C1105
C1055 40
Trane part no.BAS-0448.
Q7300C1014
Q7300C1089
Q7300C1105
C1063 38,42
Micrometl part no. 901-24. Used in Y7300C1014.
Q7300C1006
Q7300C1097
C1071 40
Obsolete
C1089 40
Tradeline. 2 stage heat pump.
Q7300C1089
C1097 38,42
Tradeline. Used with Premier White T7300.
Q7300C1097
1 stage heat pump.
C1105 40
Tradeline. Used with Premier White T7300.
Q7300C1105
2 stage heat pump.
Q7300D Heat pump system. System: Em.Ht.-Heat-Off-Cool-Auto. Fan: Auto-On.
D1004 41
Carrier part no. HH93AX002.
Q7300D1038
Q7300D1061
Q7300D1079
D1012 39,42
Carrier part no. HH93AX003.
Q7300D1053
Q7300D1087
D1020 41
York part no. 025-27724-000. Used in Y7300D1004. Q7300D1038
Q7300D1061
Q7300D1079
D1038 41
Tradeline. 2 stage heat pump.
Q7300D1038
D1046 41
Lennox part no. 13H7601.
Q7300D1038
Q7300D1061
Q7300D1079
Remarks
Brown color
Light gray color
Brown color
Brown color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Light gray color
Brown color
Brown color
Light gray color
Brown color
Brown color
Brown color
Light gray color
(Continued)
63-4038—7
20
T7200/T7300/Q7300
CROSS REFERENCE
TABLE 10—THERMOSTAT AND SUBBASE CROSS REFERENCE (Continued).
Model
Fig.
Number
No.
D1053
D1061 41
D1079 41
Description
Tradeline. 1 stage heat pump.
Tradeline. 2 stage heat pump.
Tradeline. Used with Premier White T7300.
2 stage heat pump.
D1087 39,42
Tradeline. Used with Premier White T7300.
1 stage heat pump.
Q7300E Conventional equipment. System: none. Fan: none.
E1001 28,29,
Tradeline. 2 heat and 2 cool.
30
E1019 28,29,
Tradeline. Used with Premier White T7300.
30
2 heat and 2 cool.
Q7300F
F1009
F1017
F1025
Heat pump systems. System: none. Fan: none.
44
Tradeline. 1 stage heat pump.
44
Tradeline. 2 stage heat pump.
44
Tradeline. Used with Premier White T7300.
1 stage heat pump.
F1033 44
Tradeline. Used with Premier White T7300.
2 stage heat pump.
F1041 43
Carrier part no. HH93AX006. Used in Y7300A1018.
Trade
Replacement
Remarks
Q7300D1053 Brown color
Q7300D1061 Brown color
Q7300D1079 Light gray color
Q7300D1087
Light gray color
Q7300E1001
Brown color
Q7300E1019
Light gray color
Q7300F1009
Q7300F1017
Q7300F1025
Brown color
Brown color
Light gray color
Q7300F1033
Light gray color
Q7300F1009
Q7300F1025
Brown color
Light gray color
Q7300G Conventional equipment. System: Heat-Off-Cool-Auto. Fan: none.
G1007 31,32,
Tradeline. 1 heat and 3 cool.
Q7300G1007
33,34
G1015 31,32,
Tradeline. Used with Premier White T7300.
Q7300G1015
33,34
1 heat and 3 cool.
Q7300L Conventional equipment. System: none. Fan: Auto-On.
L1006 45
LDS Church.
L1014 46
Tradeline. 2 heat and 1 cool.
21
Q7300L1014
Q7300L1014
Brown color
Light gray color
Brown color
Brown color
63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Wiring Diagrams
Fig. 23—T7200A with wallplate.
T7200
THERMOSTAT
EXISTING HVAC EQUIPMENT
WALLPLATE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
1
C
X
(IF NO "C" TERMINAL)
C1
Y1
Y1
COOL 1
W1
W1
HEAT 1
G
G
FAN
H1
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.
2
FIELD INSTALLED JUMPER.
63-4038—7
M4405
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
SO
+
SR
+
TR1
S
+
5
5
S
1K
C7150B MIXED
OR DISCHARGE
AIR SENSOR
1
2
3
4
4
18
2K
3
T
1S1
T
T1
P
P1
T1
P1
MINIMUM POSITION
ADJUSTMENT
P
MIXED AIR
SENSOR
RETURN AIR
ENTHALPY
SENSOR
C7400
+
TR1
MINIMUM
POSITION
OUTDOOR
AIR ENTHALPY
SENSOR
C7400
TR
24 VAC
M7415 ACTUATOR
C
X
Y1
W
R
W1
Y1
T6301 AMBIENT
LOCKOUT CONTROL
50o F SETPOINT
COOL 1
Y2
W1
HEAT 1
G
FAN
G
RH
6
RC
T7200A
WALLPLATE
R
L1
(HOT)
L2
1
2
HVAC EQUIPMENT
TERMINAL STRIP
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 24 VAC SECONDARY.
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR,
T7200 AND WALLPLATE
3
AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
4
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
5
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.
6
FIELD INSTALLED JUMPER.
M4407
23
63-4038—7
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 25—T7200A with electric heat system.
T7200
THERMOSTAT
EXISTING HVAC EQUIPMENT
WALLPLATE
SYSTEM
TRANSFORMER
RH
2
L1
(HOT)
R
RC
L2
X
1
C
(IF NO "C" TERMINAL)
C1
Y1
Y1
COOL 1
3
ELECTRIC
HEAT FAN
RELAY 1K
H1
W1
W1
HEAT 1
1K1
FAN
FAN
G
G
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.
2
FIELD INSTALLED JUMPER.
3
RELAY REQUIRED (R8222 OR SIMILAR).
M4406
Fig. 26—T7200B with 1-stage heat pump system.
T7200
THERMOSTAT
EXISTING HVAC EQUIPMENT
WALLPLATE
HVAC EQUIPMENT
TERMINAL STRIP
R
SYSTEM
TRANSFORMER
R
1
L1
(HOT)
L2
X
C
(IF NO "C" TERMINAL)
C/O
REV.
VALVE
O
O
Y
Y
COMP.
G
G
FAN
H1/C1
FAN
1
63-4038—7
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.
24
M4396
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 27—T7300/Q7300A with single transformer 1-stage heat/1-stage cool system.
T7300
THERMOSTAT
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
1
C
X
(IF NO "C" TERMINAL)
Y1
COOL 1
W1
HEAT 1
G
FAN
C1
Y1
H1
W1
FAN
G
L1
(HOT)
COM
CA1
3
T7147
REMOTE
COMFORT
ADJUST
MODULE
L2
LED1
CA2
CA3
1
LED2
CA4
CA5
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
T
2
FIELD INSTALLED JUMPER.
3
24 VAC ONLY.
T
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
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
X
1
C
(IF NO "C" TERMINAL)
Y1
COOL 1
Y2
COOL 2
W1
HEAT 1
G
FAN
C2
Y2
C1
Y1
H2
W2
H1
W1
FAN
G
L1
(HOT)
COM
CA1
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
LED1
L2
HEAT
1
OFF
4
CA3
COOL
LED2
CA4
AUTO
CA5
A1
ECONOMIZER
3
T
FAN SWITCH
A2
T
ON
A3
AUTO
AUXILIARY
RELAY
CONTACTS
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
FIELD INSTALLED JUMPER.
3
24 VAC ONLY.
4
MODEL
NUMBER
Q7300A
Q7300B
Q7300E
63-4038—7
SYSTEM SWITCH
FAN
SWITCH
NO
YES
YES
SYSTEM
SWITCH
NO
YES
NO
M4387
26
4
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 29—T7300/Q7300A,B used with single transformer 2-stage heat/1-stage cool system.
T7300
THERMOSTAT
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
1
C
X
(IF NO "C" TERMINAL)
C2
Y1
COOL 1
Y1
W1
HEAT 1
W2
W2
HEAT 2
G
FAN
Y2
C1
H2
H1
W1
FAN
G
L1
(HOT)
COM
CA1
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
LED1
SYSTEM SWITCH
L2
HEAT
1
OFF
4
CA3
COOL
LED2
CA4
AUTO
CA5
A1
ECONOMIZER
3
T
FAN SWITCH
A2
T
ON
A3
AUTO
AUXILIARY
RELAY
CONTACTS
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
FIELD INSTALLED JUMPER.
3
24 VAC ONLY.
4
MODEL
NUMBER
Q7300A
Q7300B
Q7300E
FAN
SWITCH
NO
YES
YES
4
SYSTEM
SWITCH
NO
YES
NO
M4388
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
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
1
C
X
(IF NO "C" TERMINAL)
Y1
COOL 1
Y2
COOL 2
W1
HEAT 1
W2
HEAT 2
G
FAN
C2
Y2
C1
Y1
H2
W2
H1
W1
FAN
G
L1
(HOT)
COM
CA1
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
LED1
L2
HEAT
1
OFF
CA3
AUTO
LED2
CA4
COOL
CA5
A1
ECONOMIZER
3
T
FAN SWITCH 4
A2
T
ON
A3
AUTO
AUXILIARY
RELAY
CONTACTS
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
FIELD INSTALLED JUMPER.
3
24 VAC ONLY.
4
MODEL
NUMBER
Q7300A
Q7300B
Q7300E
63-4038—7
SYSTEM SWITCH
FAN
SWITCH
NO
YES
YES
SYSTEM
SWITCH
NO
YES
NO
M4389
28
4
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 31—T7300/Q7300G with single transformer 1-stage heat/3-stage cool system.
T7300
THERMOSTAT
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
X
1
C
(IF NO "C" TERMINAL)
Y1
COOL 1
Y2
COOL 2
Y3
COOL 3
W1
W1
HEAT 1
G
G
FAN
C2
Y2
C1
Y1
C3
Y3
H1
FAN
L1
(HOT)
COM
CA1
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
LED1
SYSTEM SWITCH
L2
HEAT
1
OFF
CA3
AUTO
LED2
CA4
COOL
CA5
A1
ECONOMIZER
3
T
A2
T
A3
AUXILIARY
RELAY
CONTACTS
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
FIELD INSTALLED JUMPER.
3
24 VAC ONLY.
M4390
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
TR
ENTHALPY
SENSOR
C7400
+
TR
TR1
SO
+
SR
+
TR1
24 VAC
M7415 ACTUATOR
S
620 OHM
RESISTOR
5
5
1K
2
3
4
4
2K
3
T
1S1
T
T1
P
P1
T1
P1
MINIMUM POSITION
ADJUSTMENT
P
24 VAC
MIXED AIR
SENSOR
18
MINIMUM
POSITION
C7150B MIXED
OR DISCHARGE
AIR SENSOR
1
TR
TR1
A1
SENSOR T1
T
A2
MIN
POS
C
X
P1
P
M7415
Y1
W
R
Y2
T6301 AMBIENT
LOCKOUT CONTROL
Y1
COOL 1
Y2
COOL 2
W2
HEAT 2
W1
HEAT 1
G
FAN
W2
W1
G
RH
6
RC
T7300/Q7300
R
L1
(HOT)
L2
1
2
HVAC EQUIPMENT
TERMINAL STRIP
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
3
1S, AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
4
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
5
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
6
FIELD INSTALLED JUMPER.
63-4038—7
M4392
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.
W7459A ECONOMIZER PACKAGE
TR
ENTHALPY
SENSOR
C7400
+
TR
TR1
SO
+
SR
+
TR1
24 VAC
M7415 ACTUATOR
S
5
620 OHM
RESISTOR
5
1K
2
3
4
4
2K
3
T
1S1
T
T1
P
P1
T1
P1
MINIMUM POSITION
ADJUSTMENT
P
MIXED AIR
SENSOR
18
MINIMUM
POSITION
C7150B MIXED
OR DISCHARGE
AIR SENSOR
1
3K
3K1
24 VAC
A1
TR
TR1
SENSOR T1
T
3K2
A2
MIN
POS
C
X
Y1
W
R
Y2
T6301 AMBIENT
LOCKOUT
CONTROL
60oF SETPOINT
Y1
COOL 1
Y2
COOL 2
Y3
COOL 3
W1
HEAT 1
G
FAN
P1
P
M7415
Y3
W1
G
RH
6
RC
R
T7300/Q7300
HVAC EQUIPMENT
TERMINAL STRIP
L1
(HOT)
L2
1
2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
3
1S, AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
4
RELAYS 1K AND 3K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
5
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
6
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
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUPIMENT
TERMINAL STRIP
RH
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
4
RC
1
2
3
2
3
3K
X
C2
C1
Y2
Y2
Y1
Y3
Y3
Y1
W1
W1
COOL 3
H1
BLACK
RED
HEAT 1
4
5K
7
FAN
G
FAN
G
COM
6K
6K1
COOL 1
LED1
8
3K1
BLACK
YELLOW
LED2
COOL 2
TYPICAL W859D ECONOMIZER CONTROL PACKAGE
MIXED AIR
TEMPERATURE
MODUTROL
CONTROLLER
MOTOR
BLUE
B1
W
R
BLACK
B
W1
A1
R1
R
OUTDOOR AIR
CHANGEOVER
SWITCH
B
2K
T2
W
A3
8
YELLOW
R
T1
W
2K2
1K1 1K2
RISE
A2
2K1
BROWN
AUXILIARY
RELAY
CONTACTS
5
B
OPEN
T875 LOW
AMBIENT
COMPRESSOR
LOCKOUT
1K
9
MINIMUM POSITION
POTENTIOMETER
VIOLET
RED
VIOLET
4K1
5K1
4K
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.
3
ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY RISE AND 2-3 ON ENTHALPY FALL.
4
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.
6
FIELD INSTALLED JUMPER.
7
ECONOMIZER MOTOR SPRING RETURNS CLOSED ANYTIME FAN IS NOT RUNNING.
8
24 VAC ONLY.
9
A3 TERMINAL AVAILABLE ON Q7300A,B,D,E, AND G MODELS ONLY.
4
1
L1
(HOT)
63-4038—7
L2
32
M4409
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
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUPIMENT
TERMINAL STRIP
RH
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
4
RC
1
2
3
2
3
3K
X
C2
Y2
Y2
HEAT 2
W2
C1
Y1
Y1
HEAT 1.
BLACK
RED
W1
H2
W2
H1
W1
4
5K
7
FAN
G
FAN
G
COM
COOL 1
LED1
3K1
8
BLACK
YELLOW
LED2
COOL 2
TYPICAL W859D ECONOMIZER CONTROL PACKAGE
MIXED AIR
TEMPERATURE
MODUTROL
CONTROLLER
MOTOR
BLUE
B1
W
R
A1
R1
YELLOW
R
OUTDOOR AIR
CHANGEOVER
SWITCH
B
2K
T2
W
A3
R
T1
W
2K2
1K1 1K2
W1
8
2K1
B
RISE
A2
BLACK
BROWN
AUXILIARY
RELAY
CONTACTS
5
B
OPEN
T875 LOW
AMBIENT
COMPRESSOR
LOCKOUT
1K
9
MINIMUM POSITION
POTENTIOMETER
VIOLET
RED
VIOLET
4K1
5K1
4K
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.
3
ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY RISE AND 2-3 ON ENTHALPY FALL.
4
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.
6
FIELD INSTALLED JUMPER.
7
ECONOMIZER MOTOR SPRING RETURNS CLOSED ANYTIME FAN IS NOT RUNNING.
8
24 VAC ONLY.
9
A3 TERMINAL AVAILABLE ON Q7300A,B,D,E, AND G MODELS ONLY.
4
1
L1
(HOT)
L2
33
M4411
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.
W7459A ECONOMIZER PACKAGE
TR
SO
+
SR
+
TR1
S
+
5
S
1K
C7150B MIXED
OR DISCHARGE
AIR SENSOR
1
2
3
4
4
18
2K
3
T
1S1
T
T1
P
P1
T1
P1
MINIMUM POSITION
ADJUSTMENT
P
MIXED AIR
SENSOR
RETURN AIR
ENTHALPY
SENSOR
C7400
+
TR1
MINIMUM
POSITION
OUTDOOR
AIR ENTHALPY
SENSOR
C7400
TR
24 VAC
M7415 ACTUATOR
A1
A2
C
X
Y1
Y1
W
R
Y2
T6301 AMBIENT
LOCKOUT CONTROL
COOL 1
Y2
W2
W2
HEAT 2
W1
HEAT 1
G
FAN
W1
G
RH
5
RC
T7300/Q7300
R
L1
(HOT)
L2
1
2
HVAC EQUIPMENT
TERMINAL STRIP
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
3
AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
4
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
5
FIELD INSTALLED JUMPER.
63-4038—7
M4393
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
TR
ENTHALPY
SENSOR
C7400
+
TR
TR1
SO
+
SR
+
TR1
24 VAC
M7415 ACTUATOR
S
5
620 OHM
RESISTOR
5
1K
2
3
4
4
2K
3
T
1S1
T
T1
P
P1
T1
P1
MINIMUM POSITION
ADJUSTMENT
P
24 VAC
A1
MIXED AIR
SENSOR
18
MINIMUM
POSITION
C7150B MIXED
OR DISCHARGE
AIR SENSOR
1
TR
TR1
SENSOR T1
T
A2
MIN
POS
C
X
Y1
W
Y2
R
Y1
COOL 1
W2
W2
HEAT 2
W1
W1
HEAT 1
G
G
FAN
P1
P
M7415
T6301 AMBIENT
LOCKOUT
CONTROL
RH
6
RC
T7300/Q7300
R
L1
(HOT)
L2
1
2
HVAC EQUIPMENT
TERMINAL STRIP
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
3
1S, AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
4
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
5
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
6
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
Q7300 HEAT PUMP SUBBASE
EXISTING HVAC EQUIPMENT
SYSTEM
TRANSFORMER
L1
1
(HOT)
HVAC EQUIPMENT
TERMINAL STRIP
R
R
L2
X
CO HT EM.HT.
LED (RED)
AUX. HT.
LED (RED)
C
B
CO CL
2
O
SYSTEM
SWITCH
(IF NO "C" TERMINAL)
E
REV.
VALVE
B
EM. HT
O
HEAT
OFF
E
EM. HT.
RELAY
Y1
Y
COMP.
W1
W1
AUXILIARY
HEAT
G
G
FAN
COOL
AUTO
H1/C1
AUX HT
FAN
L1
(HOT)
COM
CA1
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
L2
LED1
1
FAN SWITCH
ON
AUTO
CA3
LED2
CA4
CA5
A1
3
T
ECONOMIZER
A2
T
63-4038—7
AUXILIARY
RELAY
CONTACT
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
WIRE O TO REVERSING VALVE FOR COOLING CHANGEOVER. WIRE B TO REVERSING VALVE FOR HEATING CHANGEOVER.
3
24 VAC ONLY.
M4399
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
HVAC EQUIPMENT
TERMINAL STRIP
R
1
SYSTEM
TRANSFORMER
L1
(HOT)
R
X
SYSTEM
SWITCH
EM. HT.
LED (RED)
AUX. HT.
LED (RED)
L2
C
E
EM. HT
(IF NO "C" TERMINAL)
HEAT
OFF
COOL
E
EM. HT.
RELAY
W3
AUXILIARY
HEAT 1
G
FAN
Y1
COOL 1
AUTO
AUX. HT
W3
G
FAN
C/O CL
Y1
H1/C1
2
REV.
VALVE
C/O HT
W1
CA1
L1
(HOT)
COM
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
HEAT 1
W1
L2
LED1
FAN SWITCH
1
CA3
ON
AUTO
LED2
CA4
CA5
A1
3
T
ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
REVERSING VALVE MAY BE SWITCHED FROM Y1 TO W1, OR FROM AN INTERNAL EQUIPMENT CONTROLLER, DEPENDING ON
MANUFACTURER AND SYSTEM.
3
24 VAC ONLY.
M4398
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
Q7300 HEAT PUMP SUBBASE
EXISTING HVAC EQUIPMENT
SYSTEM
TRANSFORMER
L1
1
(HOT)
HVAC EQUIPMENT
TERMINAL STRIP
R
R
L2
X
CO HT
EM. HT.
LE D(RED)
AUX. HT.
LED (RED)
C
B
CO CL
2
(IF NO "C" TERMINAL)
O
SYSTEM
SWITCH
E
REV.
VALVE
B
EM. HT
O
HEAT
OFF
E
EM. HT.
RELAY
Y1
COMP. 1
Y2
COMP. 2
W1
W1
AUXILIARY
HEAT 1
G
G
FAN
COOL
AUTO
H1/C1
Y1
C2
Y2
AUX HT
FAN
CA1
L1
(HOT)
COM
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
L2
LED1
FAN SWITCH
1
CA3
ON
AUTO
LED2
CA4
CA5
A1
3
T
ECONOMIZER
A2
T
63-4038—7
AUXILIARY
RELAY
CONTACT
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
WIRE O TO REVERSING VALVE FOR COOLING CHANGEOVER. WIRE B TO REVERSING VALVE FOR HEATING CHANGEOVER.
3
24 VAC ONLY.
M4400
38
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 41—T7300/Q7300D with 3-stage heat/2-stage cool heat pump system.
T7300
THERMOSTAT
EXISTING HVAC EQUIPMENT
Q7300 HEAT PUMP SUBBASE
HVAC EQUPIMENT
TERMINAL STRIP
R
EM. HT.
LED (RED)
AUX. HT.
LED (RED)
L1
(HOT)
R
X
SYSTEM
SWITCH
1
SYSTEM
TRANSFORMER
L2
C
E
(IF NO "C" TERMINAL)
EM. HT
HEAT
OFF
E
EM. HT.
RELAY
W3
W3
AUXILIARY
HEAT 1
G
G
FAN
Y1
Y1
COOL 1
COOL
AUTO
H3
FAN
C2
CO CL
H1/C1
COOL 2
Y2
CO CL
Y2
2
REV.
VALVE
CO HT
W1
W1
HEAT 1
W2
W2
HEAT 2
CO HT
CA1
L1
(HOT)
COM
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
L2
LED1
FAN SWITCH
1
CA3
ON
AUTO
LED2
CA4
CA5
A1
3
T
ECONOMIZER
A2
T
A3
AUXILIARY
RELAY
CONTACTS
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
REVERSING VALVE MAY BE SWITCHED FROM Y1 TO W1, OR FROM AN INTERNAL EQUIPMENT CONTROLLER, DEPENDING ON
MANUFACTURER AND SYSTEM.
3
24 VAC ONLY.
M4397
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
EXISTING HVAC EQUIPMENT
Q7300 HEAT PUMP SUBBASE
L2
L1
(HOT)
2
HVAC EQUPIMENT
TERMINAL STRIP
1
R
R
1
X
3
2
3K
CO
B
RED
RED
C
CO
7K
O
4
4
E
G
FAN
RELAY
O
REV.
VALVE
5K
4K
SYSTEM
SWITCH
EM. HT
5
4
HEAT
OFF
AUXILIARY
HEAT 1
W1
COOL
4K1
AUTO
COMP
Y
Y1
5K1
W1
4
4K2
C1
H1
3K1
G
FAN
EXISTING ECONOMIZER CONTROL PACKAGE
MIXED AIR
TEMPERATURE
MODUTROL
CONTROLLER
MOTOR
BLUE
B1
W
R
BLACK
B
W1
A1
R1
AUXILIARY
RELAY
CONTACTS
A2
OUTDOOR AIR
CHANGEOVER
SWITCH
T2
W
A3
7
YELLOW
BROWN
1K1 1K2
RISE
R
T1
B
OPEN
1K
6
MINIMUM POSITION
POTENTIOMETER
COM
RED
LED1
4K1
VIOLET
VIOLET
LED2
5K1
4K
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.
3
ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY
RISE AND 2-3 ON ENTHALPY FALL.
4
RELAY REQUIRED (R8222 OR SIMILAR).
5
ECONOMIZER MOTOR SPRING RETURNS CLOSED ANYTIME
FAN IS NOT RUNNING.
6
24 VAC ONLY.
7
A3 TERMINAL AVAILABLE ON Q7300D MODEL ONLY.
4
1
L1
(HOT)
L2
M4412
63-4038—7
40
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 43—T7300/Q7300F for 1-stage heat pump.
T7300
THERMOSTAT
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
1
C
X
(IF NO "C" TERMINAL)
Y1
Y
COMP. 1
G
FAN
C1
W1
AUX.
HT.
G
FAN
O
COOL
CHANGEOVER
O
L1
(HOT)
COM
CA1
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
L2
LED1
1
CA3
LED2
CA4
CA5
A1
K2 (AUX)
T
ECONOMIZER
3
A2
T
AUXILIARY
RELAY
CONTACT
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
FIELD INSTALLED JUMPER.
3
24 VAC ONLY.
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
EXISTING HVAC EQUIPMENT
Q7300 SUBBASE
HVAC EQUIPMENT
TERMINAL STRIP
RH
2
SYSTEM
TRANSFORMER
L1
(HOT)
R
L2
RC
X
4
1
X
COMP. 1
Y1
AUX. HT.
LED (GREEN)
4
C2
Y2
Y2
COMP. 2
H1/C1
Y1
COOL
CHANGEOVER
O
O
Y3
B
B
AUX. HT.
W1
W1
G
G
AUX. HEAT
FAN
L1
(HOT)
COM
CA1
3
CA2
T7147
REMOTE
COMFORT
ADJUST
MODULE
FAN
L2
LED1
1
CA3
LED2
CA4
CA5
A1
ECONOMIZER
3
T
A2
T
AUXILIARY
RELAY
CONTACT
1
24 VAC SECONDARY; MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF THERMOSTAT AND SUBBASE.
2
FIELD INSTALLED JUMPER.
3
24 VAC ONLY.
4
AVAILABLE ON Q7300F1017 AND Q7300F1033 ONLY.
63-4038—7
M4420
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
EXISTING HVAC EQUIPMENT
L2
L1
(HOT)
L1
L2
(HOT)
1
1
2
R
C
Y
COOLING
RELAY
1K1
2K RELAY
FC
COOL
LED
2K1
LOW SPEED
FAN RELAY
GL
FAN
3
2K2
GH
1K RELAY
RM
H
4K1
ML984A VALVE
ACTUATOR
HIGH SPEED
FAN RELAY
R1
T5
B3
T6
3K1
BM
W
HEAT
LED
180 Ω 2W
3K RELAY
4
X
A1
DAMPER
CONTROL RELAY
5K1
A2
FAN
ON
P1
AUTO
PUMP
INTERLOCK RELAY
3K2
P2
AUTO
SYSTEM
SWITCHING
MICROPROCESSOR
CONTROL
CA1
CA1
CA2
CA2
CA3
CA3
CA4
CA4
CA5
CA5
RS1
T
T
RS2
T
T
POWER
SUPPLY
COMMUNICATION
LINES
COMMUNICATION
SUBBASE RELAY
CONTROL AND
COMMUNICATION
(INCLUDES 4K
AND 5K RELAYS)
5
T7147A
REMOTE
SENSOR
AND
OVERRIDE
MODULE
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
INDEPENDENT FAN TRANSFORMER OPTIONAL. IF SINGLE TRANSFORMER IS USED, JUMPER FC TO R.
3
FOR SINGLE SPEED FAN, JUMPER GL AND GH.
4
180 Ω 2W RESISTOR MUST BE INSTALLED AS SHOWN.
5
REFER TO T7147 INSTRUCTIONS FOR APPROPRIATE CA TERMINAL CONNECTIONS. T7047 HAS T-T TERMINALS ONLY.
43
M4377
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
L2
(HOT)
1
R
C
Y
COOLING
RELAY
1K1
2K RELAY
2
FC
COOL
LED
2K1
LOW SPEED
FAN RELAY
GL
FAN
2K2
GH
1K RELAY
RM
HIGH SPEED
FAN RELAY
3K1
H
4K1
BM
HEAT
LED
3K RELAY
X
A1
DAMPER
CONTROL RELAY
5K1
A2
FAN
ON
P1
AUTO
HEAT RELAY
3K2
P2
AUTO
SYSTEM
SWITCHING
MICROPROCESSOR
CONTROL
CA1
CA1
CA2
CA2
CA3
CA3
CA4
CA4
CA5
CA5
RS1
T
T
RS2
T
T
POWER
SUPPLY
COMMUNICATION
COMMUNICATION
LINES
SUBBASE RELAY
CONTROL AND
COMMUNICATION
(INCLUDES 4K
AND 5K RELAYS)
3
T7147A
REMOTE
SENSOR
AND
OVERRIDE
MODULE
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
FOR SINGLE SPEED FAN JUMPER GL AND GH.
3
REFER TO T7147 INSTRUCTIONS FOR APPROPRIATE CA TERMINAL CONNECTIONS. T7407 HAS T-T TERMINALS ONLY.
63-4038—7
44
M4378
T7200/T7300/Q7300
TROUBLESHOOTING
Troubleshooting
Refer to Figs. 47 and 48 to troubleshoot problems with the thermostat and system.
Fig. 47—Troubleshooting chart to quickly isolate a display or fan problem.
SYMPTON
LCD TEMPERATURE
DISPLAY IS --°.
POSSIBLE CAUSE
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.
Q7300 SWITCH 5 INCORRECTLY SET.
INCOMPLETE CIRCUIT.
CHECK WIRING FOR SHORTS OR OPENS
BETWEEN THERMOSTAT AND REMOTE SENSOR.
LCD IS BLANK.
NO ac VOLTAGE TO THERMOSTAT.
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.
ALL SEGMENTS OF
LCD ARE DISPLAYED.
THERMOSTAT IS IN TEST MODE.
PRESS CLOCK AND DAY KEYS AT THE SAME TIME. REPLACE
THERMOSTAT IF REPEATED ATTEMPTS FAIL.
BATT DISPLAYED ON
LOWER RIGHT LCD.
THERMOSTAT HAS DETECTED LOW
BATTERY VOLTAGE.
• CHECK BATTERY CONNECTIONS.
• REPLACE BATTERY.
LCD DISPLAYS ----.
THERMOSTAT HAS NO PROGRAM.
• CHECK BATTERY (7.5 VDC).
• CHECK BATTERY CONNECTIONS.
• REPROGRAM THERMOSTAT.
• CHECK OPERATION. IF BATTERY OK AND THERMOSTAT LOOSES
PROGRAM, REPLACE THERMOSTAT.
LCD HAS ONLY
PARTIAL DISPLAY.
FAULTY THERMOSTAT.
REPLACE T7300.
FAN DOES NOT RUN.
Q7300 SWITCH 4 INCORRECTLY SET.
• 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.
INOPERATIVE THERMOSTAT.
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.
HVAC SYSTEM OR THERMOSTAT
PROBLEM.
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.
FAN DOES NOT
STOP.
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
ACTION
NO ac VOLTAGE TO THERMOSTAT.
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.
HEATING SYSTEM WILL NOT
TURN ON.
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 TEMPERTURE).
—HEAT COMES ON, THERMOSTAT AND HEATING SYSTEM OK.
—NO HEAT, REPLACE THERMOSTAT.
•• HEAT ON, THERMOSTAT AND HEATING SYSTEM OK.
•• NO HEAT, REPLACE Q7300.
HEATING SYSTEM WILL NOT
TURN OFF.
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 TEMPERTURE).
—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.
COOLING SYSTEM WILL NOT
TURN ON.
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 TEMPERTURE).
—COOL COMES ON, THERMOSTAT AND COOLING SYSTEM OK.
—NO COOL, REPLACE THERMOSTAT.
•• COOL ON, THERMOSTAT AND COOLING SYSTEM OK.
•• COOL TURNS OFF, REPLACE Q7300.
COOLING SYSTEM WILL NOT
TURN OFF.
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 TEMPERTURE).
—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
63-4038—7
Printed
in U.S.A.
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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