Honeywell Stud Sensor G User Manual
T7047C,G,H  
Remote Space Sensors  
INSTALLATION INSTRUCTIONS  
APPLICATION  
SPECIFICATIONS  
The T7047 Remote Space Sensors are used in Series 70  
Control Systems to provide modulating space  
temperature control.  
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.  
Models:  
T7047C: 2-wire remote sensor with no internal  
adjustment means (requires remote setpoint device  
such as S963B, T7067B, and T7080B).  
T7047C1009: 2-wire remote sensor for use with  
control systems such as M7044 and M7045  
Motors.  
T7047C1025: 2-wire remote sensor for use with control  
systems such as the W927, W960, and W973.  
T7047C1082: 2-wire remote sensor for use with  
T7080B Transmitter in W7080 Multizone Control  
System.  
T7047G: 2-wire remote sensor with no internal  
adjustment means (requires remote setpoint device  
such as S963B, T7067B or T7080B).  
T7047H: Thin-film, platinum 1K (at 0°C) temperature  
sensor only. For use with the Excel 80/100/500/600  
Controllers.  
Dimensions: See Fig. 1.  
Mounting: Mounts on wall or 2 x 4 in. vertical outlet box  
with screws provided.  
Temperature Sensor: Thermistor-resistor element.  
Cover Thermometer (available on most models):  
Element: Bimetal.  
Range: 55 to 95°F (13 to 35°C).  
® U.S. Registered Trademark  
Copyright © 2001 Honeywell • All Rights Reserved  
62- 0179  
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T7047C,G,H REMOTE SPACE SENSORS  
INSTALLATION  
When Installing this Product...  
2000  
1800  
1. Read these instructions carefully. Failure to follow  
them could damage the product or cause a  
hazardous condition.  
1695 OHMS AT  
75°F (24°C)  
1600  
1400  
1200  
1000  
2. Check the ratings given in the instructions and on  
the product to make sure the product is suitable for  
your application.  
3. Installer must be a trained, experienced service  
technician.  
4. After installation is complete, check out product  
operation as provided in these instructions.  
°F  
10  
-10  
20  
30  
40  
50  
10  
60  
70  
20  
80  
90  
100  
°C  
0
30  
40  
CAUTION  
TEMPERATURE (DEGREES)  
M3399  
Electrical Shock or Equipment Damage  
Hazard.  
Fig. 3. T7047C1009 Remote Sensor resistance  
change with change in temperature.  
Can shock individuals or short equipment  
circuitry.  
Disconnect power supply before installation.  
RESISTANCE  
(OHMS)  
2000  
Location  
Locate the remote sensor about 5 ft (1.5m) above the  
floor on an inside wall where it will be affected by freely  
circulating air at average room temperatures.  
1800  
1600  
1420 OHMS AT  
75 F (24 C)  
1400  
Mounting  
1200  
1000  
1. Loosen the cover locking screw with the Allen  
wrench provided and remove the device cover.  
2. Run wire to the selected location.  
3. Thread wire through the semicircular hole in the  
device.  
F
10  
-10  
20  
30  
40  
50  
10  
60  
70  
20  
80  
90  
100  
C
0
30  
40  
4. Make connections to the T7047 (see the Wiring  
section).  
TEMPERATURE (DEGREES)  
M4034  
5. Select the proper screws for the application. Four  
mounting screws are provided:  
Fig. 4. T7047C1025 Remote Sensor resistance  
change with change in temperature.  
a. Two self-tapping type for wall mounting.  
b. Two for outlet box mounting.  
6. If air drafts occur through the wall opening,  
eliminate with suitable material.  
7. Fasten the T7047 on the wall or outlet box with  
screws through the mounting holes in the device.  
(See Fig. 2.)  
120K  
100K  
80K  
60K  
8. Replace the cover and tighten the cover locking  
screw.  
22,800 OHMS AT  
40K  
77 F (25 C)  
THERMOSTAT  
20K  
MOUNTING  
TAB SLOT (2)  
F
220  
20  
-7  
40  
60  
80  
100 120 140 160 180 200  
C
MOUNTING  
SCREW (2)  
0
10  
20 30  
40  
50  
60  
70  
80  
90 100  
M3398  
TEMPERATURE (DEGREES)  
MOUNTING  
TAB (2 INSIDE  
COVER)  
Fig. 5. T7047C1082 Remote Sensor resistance  
change with change in temperature.  
WIRING  
TERMINALS  
OUTLET  
BOX  
COVER  
COVER LOCKING SCREW  
M20072  
Fig. 2. Mounting the T7047.  
3
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T7047C,G,H REMOTE SPACE SENSORS  
RESISTANCE  
(OHMS)  
S963B1003  
REMOTE SETPOINT  
POTENTIOMETER  
1000  
W
R
B
900  
M7044 OR  
M7045 MOTOR  
800  
T7047C  
710 OHMS AT  
75 F (24 C)  
700  
600  
500  
4
T1  
TO 24V  
1
POWER  
SUPPLY  
T
t
T2  
F
T
T1  
110  
10  
-10  
20  
30  
40  
50  
10  
60  
70  
20  
80  
90  
100  
M3383  
C
0
30  
40  
TEMPERATURE (DEGREES)  
M5354  
Fig. 8. Internal schematic and typical  
wiring for T7047C1009.  
Fig. 6. T7047G1000 Remote Sensor resistance  
change with change in temperature.  
W960 OR  
W927 PANEL  
T7047C  
RESISTANCE  
(OHMS)  
1400  
T
T
T1  
T2  
1317  
t
1231  
1145  
M3386  
Fig. 9. T7047C1025 connected to W960 or W927  
panel with internal setpoint adjustment.  
1093 OHMS AT  
1059  
75 F (24 C)  
973  
Q7300  
T
T
F
20  
-7  
40  
60  
80  
100 120 140 160 180 200 220  
T7047C  
T
C
100  
M10020  
0
10  
20  
30  
40  
50  
60 70  
80  
90  
T
TEMPERATURE (DEGREES)  
T7047G1000  
Fig. 7. T7047H1008 Remote Sensor resistance  
change with change in temperature.  
T
T
T7047C  
T
Wiring  
T
IMPORTANT  
All wiring must agree with applicable codes,  
ordinances and regulations.  
M3418  
Fig. 8 through 16 show schematics and typical  
connections. Also refer to instructions supplied with other  
system components.  
Fig. 10. Two T7047C1025 Sensors and one  
T7047G1000 Sensor providing a  
temperature-averaging network for a  
T7300/Q7300 Thermostat/Subbase.  
IMPORTANT  
To avoid electrical interference, which can  
cause erratic performance, keep wiring runs as  
short as possible and do not run wires adjacent  
to the line voltage electrical distribution  
systems. 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.  
EXCEL 500/100/80  
CONTROLLER  
A1  
A1  
COMMON  
T7047H  
M10019  
Fig. 11. Typical wiring for T7047H1008 to  
Excel 80/100/500/600 Controller.  
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T7047C,G,H REMOTE SPACE SENSORS  
Q7300  
T
T
W973 LOGIC PANEL  
C7046A  
DISCHARGE  
AIR SENSOR  
ECONO  
STAT  
+20  
24 VAC  
SENSOR  
C
H
N
T7047G1000  
T7047G1000  
T
T
T
T1  
3
4
2
5
1 T R T R  
W
B
Y
R
T
T
L1  
(HOT)  
M3421  
L2  
1
Fig. 14. Two T7047G1000 Sensors providing a  
temperature-averaging network for a  
T7300/Q7300 Thermostat/Subbase.  
T7067 WALLPLATE  
T7047C  
REMOTE  
SENSOR  
Q7300  
1
7
T
T
3
2
T
T
2
6
5
T7047G  
T7047G  
3
8
4
T
T
T
T
T7047G  
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
1
T
T
T7047G  
T7047G  
TERMINAL 8 IS USED WITH THE W974A, B ONLY. TERMINAL 6 IS  
USED WITH THE W974A, B AND/OR REMOTE SENSING ELEMENT  
(T7067B ONLY).  
2
T
T
T
T
3
TERMINALS 6 AND 7 ARE USED TO CONNECT THE REMOTE SENSING  
ELEMENT TO THE T7067B ONLY. NO SCREW IS PROVIDED WITH THE  
T7067A FOR TERMINAL 7. DOTTED LINES SHOW REMOTE SENSING  
M3422  
M3411  
ELEMENT CONNECTIONS.  
Fig. 15. Five T7047G1000 Sensors providing  
a temperature-averaging network for a  
T7300/Q7300 Thermostat/Subbase.  
Fig. 12. T7047C1025 used as a remote  
sensor with T7067B Thermostat.  
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. 13. Four T7047C1025 Sensors providing  
a temperature-averaging network for a  
T7300/Q7300 Thermostat/Subbase.  
T
M3419  
Fig. 16. Nine T7047C1025 Sensors providing  
a temperature-averaging network for a  
T7300/Q7300 Thermostat/Subbase.  
5
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T7047C,G,H REMOTE SPACE SENSORS  
W7080A  
LOAD ANALYZER  
C3  
H3  
1. THE W7080 REQUIRES SEPARATE TRANSFORMER.  
DO NOT GROUND SECONDARY.  
2. EACH M744, M745 MOTOR REQUIRES SEPARATE  
TRANSFORMER. DO NOT GROUND SECONDARY.  
C2  
C1  
H2  
H1  
C
HI  
LO  
HT  
9
ZONES  
1
2
3
5
6
8
10  
4
7
11  
12  
24 VAC  
24 VDC  
+
–
COMMON  
ZONE 1  
1
DAMPER  
MOTOR  
M734J  
L2  
L1  
(HOT)  
R
C
T7080 FOR ZONE 1  
C7100B  
DISCHARGE  
AIR  
NIGHT  
SETBACK  
RESISTANCE  
SENSOR  
T7047C1082  
(USED WITH  
T7080B ONLY)  
1
7
2
3
2
3
8
6
5
T
T
4
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
1
2
TERMINALS 3, 7 AND 8 ARE ALL EQUIVALENT COMMON TERMINALS.  
3
RESISTOR AND TIME SWITCH IN SERIES BETWEEN TERMINALS 5-7.  
SEE FIG. 6, PAGE 5.  
M5355  
Fig. 17. T7047C1082 used as a remote  
sensor with T7080B Thermostat.  
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T7047C,G,H REMOTE SPACE SENSORS  
OPERATION AND CHECKOUT  
Operation  
Low Range Thermostat  
The T7047C,G Remote Sensor control element is a  
negative temperature coefficient (NTC) thermistor. As  
the room temperature increases, the resistance of the  
thermistor decreases.  
Use caution when setting temperatures below 40°F  
(5°C). A low temperature setpoint can result in  
temperatures below freezing in areas distant from the  
remote sensor.  
The T7047H Remote Sensor control element is a  
positive temperature coefficient (PTC) thermistor. As  
the room temperature increases, the resistance of the  
thermistor increases.  
Calibration  
The T7047 Remote Space Sensor is accurately  
calibrated at the factory. It cannot be field calibrated.  
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.  
Checkout  
Allow the T7047 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 sensor resistance in accordance with the  
temperature curves. See Fig. 3 through 7.  
Check operation of the complete control systems as  
directed in the associated technical publications.  
7
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