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T7047C,G  
Electronic Thermostats  
and Remote Space Sensors  
INSTALLATION INSTRUCTIONS  
APPLICATION  
1
-13/16 (46)  
The T7047C,G Electronic Thermostats and Remote  
Space Sensors are used in Series 70 Control Systems  
to provide modulating space temperature control.  
3-1/4  
83)  
(
4
-5/8  
(117)  
SPECIFICATIONS  
3
-13/16  
97)  
Models:  
(
T7047C: 2-wire remote sensor for use with control  
systems such as the T7100, T7300, W927, W960,  
and W973.  
T7047G: 2-wire remote sensor without internal  
adjustment means, requires remote setpoint device  
such as T7100, T7300, S963B, 7067B or T7080B.  
7
/8 (22)  
3/8  
2-7/8 (73)  
1
-1/16 (27)  
(10)  
3-5/8 (92)  
M17720  
Dimensions: See Fig. 1.  
Fig. 1. T7047 dimensions in in. (mm).  
Temperature Sensor: Thermistor-resistor element.  
Sensor Resistance:  
INSTALLATION  
For the following negative temperature coefficient (NTC)  
devices, resistance decreases as temperature  
increases (Fig. 8 and 9):  
T7047C: 1420 ohms nominal at 75°F (24°C);  
resistance changes 15 ohms for each 1°F (0.6°C)  
temperature change.  
T7047G: 710 ohms nominal at 75°F (24°C);  
resistance changes 7.5 ohms for each 1°F (0.6°C)  
temperature change.  
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 in the instructions and on  
the product to make sure the product is suitable for  
your application.  
Mounting: Mounts on wall or 2 x 4 in. vertical outlet box  
with screws provided.  
3. Installer must be a trained, experienced service  
technician.  
4.  
After installation is complete, check out product  
operation as provided in these instructions.  
Accessories:  
2
09649A Universal Cover Plate (taupe);  
-3/4 x 7-3/8 in. (146 x 187 mm).  
09650A Universal Cover Plate (premier white);  
-3/4 x 7-3/8 in. (146 x 187 mm).  
5
2
CAUTION  
5
Electrical Shock or Equipment  
Damage Hazard.  
Can shock individuals or short equipment  
circuitry.  
Disconnect power supply before installation.  
6
2-3050—3  
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T7047C,G ELECTRONIC THERMOSTATS AND REMOTE SPACE SENSORS  
IMPORTANT  
Location  
All wiring must agree with applicable codes, ordi-  
nances and regulations.  
Locate the thermostat or remote sensor about 5 ft (1.5m)  
above the floor on an inside wall where it is affected by  
freely circulating air at average room temperatures.  
To avoid electrical interference, which can cause  
erratic performance, keep wiring runs as short as  
possible and do not run thermostat wires adja-  
cent to the line voltage electrical  
Mounting  
distribution systems.  
1.  
Loosen the cover locking screw and remove the  
thermostat cover.  
Use shielded cable (Belden type 8762 or  
equivalent for 2-wire and Belden type 8772 or  
equivalent for 3-wire).  
The cable shield must be grounded only at the  
controlled equipment case.  
2.  
Run wire to the selected location; thread wire  
through the semicircular hole in the thermostat; and  
make connections to the T7047 (see the  
Wiring section).  
3
.
Four mounting screws are provided, two self-  
tapping type for wall mounting and two for outlet  
box mounting. Select the proper screws for the  
application.  
If air drafts occur through the wall opening,  
eliminate with suitable material.  
Fasten the T7047 on the wall or outlet box with  
screws through the thermostat mounting holes. See  
Fig. 2.  
Q7300  
T
T
4
.
.
T7047G1000  
T7047G1000  
T
T
5
T
T
NOTE: Connect sensor wires to T-T terminals on  
the thermostat cover assembly.  
M3421  
6.  
Replace the cover and tighten the cover locking  
screw.  
Fig. 3. Two T7047G Sensors providing a  
temperature-averaging network for a T7100/Q7100  
or T7300/Q7300 Thermostat/Subbase.  
WALLPLATE  
OUTLET BOX  
MOUNTING  
SCREW (2)  
Q7300  
T
T
MOUNTING  
TAB  
(2 INSIDE  
COVER)  
T7047C  
T
T
T7047G1000  
MOUNTING  
TAB SLOT (2)  
T7047C  
T
T
T
T
COVER  
LOCKING  
SCREW  
THERMOSTAT  
M17719  
Fig. 2. Mounting the T7047.  
M3418  
Wiring  
Fig. 4. Two T7047C Sensors and one T7047G Sensor  
providing a temperature-averaging network for a  
T7100/Q7100 or T7300/Q7300 Thermostat/Subbase.  
CAUTION  
Electrical Shock or Equipment Damage  
Hazard.  
Can shock individuals or short equipment  
circuitry.  
Disconnect power supply before installation.  
Fig. 3 through 7 show schematics and typical  
connections. Also refer to instructions supplied with other  
system components.  
62-3050—3  
2
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T7047C,G ELECTRONIC THERMOSTATS AND REMOTE SPACE SENSORS  
Q7300  
Q7300  
T
T
T
T
T7047C  
T
T7047C  
T
T7047C  
T
T7047C  
T
T7047C  
T
T
T
T
T
T
T
T
T
T
T7047C  
T
T7047C  
T
T7047C  
T
T7047C  
T
T7047C  
T
T
T
T
M3420  
T7047C  
T
T7047C  
T
T7047C  
T
Fig. 5. Four T7047C Sensors providing a  
temperature-averaging network for a T7100/Q7100  
or T7300/Q7300 Thermostat/Subbase.  
T
Q7300  
M3419  
T
T
Fig. 7. Nine T7047C Sensors providing a temperature-  
averaging network for a T7100/Q7100  
T7047G  
T7047G  
or T7300/Q7300 Thermostat/Subbase.  
T
T
T
T
T7047G  
T
T
T7047G  
T7047G  
T
T
T
T
M3422  
Fig. 6. Five T7047G Sensors providing a  
temperature-averaging network for a T7100/Q7100  
or T7300/Q7300 Thermostat/Subbase.  
3
62-3050—3  
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T7047C,G ELECTRONIC THERMOSTATS AND REMOTE SPACE SENSORS  
OPERATION AND CHECKOUT  
RESISTANCE  
(
OHMS)  
000  
2
Operation  
1
800  
The T7047C,G Electronic Thermostat or Remote Space  
Sensor control element is a negative temperature  
coefficient (NTC) thermistor. As the room temperature  
increases, the resistance of the thermistor decreases.  
1600  
1400  
1
420 OHMS AT  
75 F (24 C)  
1
200  
000  
The change in the thermistor resistance causes the  
motor, system logic panel or system transmitter bridge  
circuit to become unbalanced. As the electronic motor,  
system logic panel or system transmitter circuits react to  
rebalance the circuit, damper or valve movement, or  
sequential staging of heating and/or cooling equipment  
occurs.  
1
F
1
0
20  
30  
40  
50  
10  
60  
70  
20  
80  
90  
100  
C
-10  
0
30  
40  
TEMPERATURE (DEGREES)  
M4034  
Fig. 8. T7047C Remote Sensor resistance  
change with change in temperature.  
Calibration  
The T7047C,G Electronic Thermostat or Remote Space  
Sensor is accurately calibrated at the factory. It cannot be  
field calibrated.  
RESISTANCE  
OHMS)  
000  
(
1
Checkout  
9
00  
Allow the T7047C,G Electronic Thermostat or Remote  
Space Sensor to stabilize to ambient conditions before  
taking a resistance measurement. Measure nominal  
resistance according to the values described in the  
Specifications section. Measure the T7047 resistance in  
accordance with the temperature curves. See Fig. 8 and  
800  
7
10 OHMS AT  
75 F (24 C)  
7
6
00  
00  
9.  
500  
Check operation of the complete control systems as  
directed in the associated technical publications.  
F
1
0
20  
30  
40  
50  
10  
60  
70  
20  
80  
90  
100 110  
C
-
10  
0
30  
40  
TEMPERATURE (DEGREES)  
M5354  
Fig. 9. T7047G Remote Sensor resistance  
change with change in temperature.  
Automation and Control Solutions  
Honeywell International Inc.  
985 Douglas Drive North  
Honeywell Limited-Honeywell Limitée  
35 Dynamic Drive  
1
Golden Valley, MN 55422  
customer.honeywell.com  
Scarborough, Ontario M1V 4Z9  
®
©
U.S. Registered Trademark  
2005 Honeywell International Inc.  
62-3050—3 B.B. Rev. 02-05