Honeywell Smoke Alarm C7021B User Manual

Series 2000  
Electronic Temperature Sensors  
PRODUCT DATA  
C7021B/C  
C7023B/C  
C7031B  
C7021D  
C7023D  
C7031D  
C7041D  
C7021P  
C7023P  
C7041P  
C7041B/C  
C7021F  
C7023F  
C7031G  
C7041F  
C7021N  
C7023N  
C7041N  
C7021J  
C7023J  
C7031J  
C7041J  
C7021R  
C7023R  
C7041R  
C7021K  
C7023K  
C7041K  
C7021J/R, C7023J/R, C7031J, C7041J/R sense average  
duct air temperature.  
APPLICATION  
C7021B/C, C7023B/C, C7031B, C7041B/C sense duct  
air temperature.  
The Series 2000 C7021, C7023, C7031 and C7041 Electronic  
Temperature Sensors are designed for use with electronic  
controllers in domestic or commercial heating and cooling  
systems.  
C7021K, C7023K, C7041K with strap-on mounting  
senses water temperature.  
C7021N, C7023N, C7041N probe senses water or air  
temperature.  
FEATURES  
C7021P, C7023P, C7041P senses air temperature.  
Solid state components not affected by dust or dirt.  
C7021D, C7023D, C7031D, C7041D for immersion  
mounting sense water temperature.  
C7021F, C7023F, C7031G, C7041F sense outdoor air  
temperature and are weatherproof for outdoor use  
(knockouts allow for 1/2 in. conduit connection).  
Contents  
Application......................................................................... 1  
Features ............................................................................ 1  
Specifications .................................................................... 2  
Installation ......................................................................... 8  
Wiring ................................................................................11  
Operation and Checkout ...................................................11  
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SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
Table 1. Sensor Selection and Application Guide  
Element Max  
Ambient  
Temperature  
Element  
Element  
Sensor Resistance  
in Ohms  
a
Model Control Application Insertion Length Operating Range  
Sensitivity  
-40° to 158°F  
(-40° to 70°C)  
C7023F Outdoor air  
C7023J Duct discharge air  
(averaging sensor  
-40° to 250°F  
(-40° to 121°C)  
with 4 elements)  
12 ft (3.7m)  
C7023K Hot water (strap-on  
f
mounting)  
10K Ohms NTC @  
77° F Type III  
250°F (121°C)  
C7023N Water / Air (bullet  
probe)  
C7023P Space air  
temperature (button  
probe)  
C7023R Duct discharge air  
(rigid copper  
-40° to 250°F  
(-40° to 121°C)  
12 ft (3.7m) or 24  
ft (7.3m)  
averaging sensor)  
c
C7031B Duct discharge air  
6 in. (152 mm)  
-40° to 250°F  
(-40° to 121°C)  
250°F (121°C)  
370°F (187°C)  
120°F (49°C)  
120°F (49°C)  
2.1 (3.9)  
2.1 (3.9)  
2.2 (3.4)  
2.1 (3.9)  
1097 at 77° (25°C)  
c
C7031D Hot or chilled water 5 in. (127 mm)  
40° to 350°F  
(4° to 115°C)  
1097 at 77° (25°C)  
c
C7031G Outdoor air  
-2006  
-40° to 120°F  
(-40° to 49°C)  
1715 at 90°F (32°C)  
c
C7031G Outdoor air  
-40° to 120°F  
(-40° to 49°C)  
3484 at 77°F (25°C)  
d
-2014  
c
C7031J Duct discharge air  
(averaging sensor  
12 ft (3.7m)  
40° to 180°F  
(4° to 82°C)  
250°F (121°C)  
250°F (121°C)  
2.1 (3.9)  
1097 at 77° (25°C)  
with 4 elements)  
C7041B Duct discharge air  
6 in. (152 mm) or  
12 in. (305 mm)  
20K Ohms NTC at  
-40° to 250°F  
(-40° to 121°C)  
e
77°F (25°C)  
C7041C Duct discharge air  
18 in. (457 mm)  
5 in. (127 mm)  
b
C7041D  
Hot or chilled water  
C7041F Outdoor air  
-40° to 158°F  
(-40° to 70°C)  
C7041J Duct discharge air  
(averaging sensor  
12 ft (3.7m)  
with 4 elements)  
-40° to 250°F  
(-40° to 121°C)  
C7041K Hot water (strap-on  
f
mounting)  
Water / Air (bullet  
C7041N  
probe)  
C7041P Space air  
temperature (button  
probe)  
C7041R Duct discharge air  
(rigid copper  
12 ft (3.7m) or  
24 ft (7.3m)  
averaging sensor)  
3
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SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
a
Control sensitivity in ohms per degree F (per degree C) for element operating range.  
b
Order immersion well separately (50001774-001)  
c
Resistance increases as temperature increases.  
d
Use with T7350 Commercial Thermostat.  
e
Nonlinear resistance decreases as temperature increases.  
f
Not equipped with well; temperature sensed at surface of pipe.  
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4
 
SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
Sensor Resistance  
Table 2. Typical Resistance of Sensor Models.  
Typical Resistance (in ohms)  
C7021 Sensors  
(10K Ohm NTC Type II) (10K Ohm NTC Type III)  
C7023 Sensors  
C7031 Sensors  
(1097 Ohms PTC)  
C7041 Sensors  
(20K ohm NTC)  
At 41°F (5°C)  
At 50°F (10°C)  
At 59°F (15°C)  
At 68°F (20°C)  
At 77°F (25°C)  
At 86°F (30°C)  
At 95°F (35°C)  
25,392  
19,901  
15,712  
12,493  
10,000  
8,057  
23,467  
18,789  
15,137  
12,268  
10,000  
8,196  
1,020  
54,200  
1,039  
1,059  
1,078  
1,097  
1,117  
1,136  
41,758  
32,427  
25,370  
20,000  
15,856  
12,654  
6,531  
6,754  
3/16 (4)  
1 (26)  
7/8 (22)  
C7031B: 5-11/16 (145)  
C7021B, C7023B, C7041B: 11-5/8 (295)  
C7021B, C7023B, C7041C: 17-5/8 (448)  
5/16  
(8)  
1-13/16  
1 (26)  
(46)  
1-11/16  
(43)  
7/16 (12)  
11/16  
(18)  
5/8 (16)  
3/8 IN.-16 THREAD  
SENSOR  
4
(102)  
SPACER  
1/8 NPSM (3)  
M22821  
Fig. 2. Dimensions of the C7021P, C7023P, C7041P in in.  
(mm)  
1-11/16  
(43)  
5.75 0.25  
(146)  
3-7/8 (99)  
15/16  
(23)  
2-5/16  
(59)  
1/8 INCH NPSM  
STRAIGHT  
FOAM PAD  
THREADS  
[8] 1/2 INCH  
CONDUIT  
KNOCKOUTS  
1-59/64  
(49)  
4-3/16  
(107)  
3/4  
(19)  
SINGLE GANG  
RACO COVER  
M27010A  
[2] 1/64 (5) X 5/8 (16)  
MOUNTING HOLES  
3-57/64  
(99)  
Fig. 1. C7021B/C, C7023B/C, C7041B/C dimensions in in.  
(mm).  
2-19/64  
(58)  
1-5/32  
(29)  
2-3/32 (53)  
4-3/16 (106)  
M27006  
Fig. 3. C7031B dimensions in in. (mm)  
5
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SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
3-5/8 (91)  
1 (25)  
2-1/4 (57)  
3/4  
(19)  
8-5/16  
(211)  
5
(127)  
7/8  
(22)  
M22132  
Fig. 4. C7031G, C7021F, C7023F, C7041F dimensions in in.  
(mm).  
1-11/16  
(43)  
6-11/16 (170)  
5 (127)  
1-11/16  
(43)  
2-5/16  
(59)  
1/4  
(6)  
1/2 NPSM (13)  
4
4-3/16  
(107)  
(70)  
M22596  
Fig. 5. C7021D, C7023D, C7031D, C7041D dimensions in in. (mm)  
NOTE: The C7021D, C7023D, C7041D uses the 50001774-  
001 Well Assembly. See Fig. 4 for dimensions.  
FITS 1/2 NPT TAPPED HOLE  
3/8 (10)  
1/2 NPSM  
INTERNALLY  
THREADED  
3/4  
(19)  
4 (102)  
1
(26)  
M27052  
Fig. 6. 50001774-001 Immersion Well dimensions in in.  
(mm)  
63-2590—05  
6
 
SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
1-11/16  
(43)  
1
1-13/16  
(46)  
7/16 (12)  
3-7/8 (99)  
1-11/16  
(43)  
15/16  
(23)  
2-5/16  
(59)  
4
4-3/16  
(107)  
3/4  
(70)  
(19)  
1/8 NPSM (3)  
1
DEPENDING ON THE MODEL, THE ELEMENT LENGTH IS EITHER 12 FT (366 CM) OR 24 FT (732 CM).  
M22818  
Fig. 7. C7021R, C7023R, C7041R dimensions in in. (mm).  
4-3/16 (107)  
1-1/2  
(38)  
2-5/16 1-1/2  
9/16 (14)  
(59)  
(38)  
7-1/8 (182)  
5 (127)  
1
1-11/16  
(43)  
1-1/4  
(32)  
2-5/16  
(59)  
4
(70)  
4-3/16  
(107)  
COPPER PLATE  
FOAM PAD  
1
MAXIMUM PIPE DIAMETER SHOWN.  
MINIMUM PIPE DIAMETER: 1-5/8 (41)  
M22134  
Fig. 8. C7021K, C7023K, C7041K dimensions in in. (mm).  
7
63-2590—05  
 
SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
PROBE  
1 X Ø 1/32 (1)  
6 FT 6 IN (1829 152)  
STRIP LENGTH  
2X 1/4 (6)  
2
1/2 (51 13)  
CONDUCTOR CABLE  
POTTING MATERIAL LEVEL  
0.063 MAX. FROM TOP OF PROBE  
M33019  
Fig. 9. C7021N, C7023N, C7041N dimensions in in. (mm).  
CAUTION  
1-11/16  
(43)  
Electrical Shock or Equipment Damage Hazard.  
Can shock individuals or short equipment  
circuitry.  
Disconnect power supply before installation.  
1-11/16  
(43)  
1(25)  
2-5/16  
(59)  
Mounting  
The method of mounting depends on the particular application  
of the temperature sensor. The following procedures include  
outdoor, duct, immersion well and strap-on applications. Also  
refer to the instructions for the electronic control.  
4
(70)  
4-3/16  
(107)  
Outdoor Mounting (C7031G, C7021F,  
C7023F, C7041F)  
The C7031G, C7021F, C7023F and C7041F sense outdoor air  
temperature. Mount this control where it can sense average  
outdoor air temperature. Normally, the north side of a building  
provides a suitable location.  
NOTE: These sensors are weatherproof for outdoor use.  
Knockouts allow for 1/2 in. conduit connection.  
4 THERMISTORS PLACED  
ON A 12 FOOT (3.7M) WIRE.  
M22133  
1. Remove and set aside the wiring box cover.  
2. Mount the sensor to standard 1/2 in. conduit.  
Fig. 10. C7021J, C7023J, C7031J, C7041J dimensions in in.  
(mm).  
NOTE: Mount sensor so that the element points down.  
3. Make wiring connections using two wire nuts.  
4. Reattach the wiring box cover.  
INSTALLATION  
Duct Mounting  
When Installing this Product...  
The C7031B, C7031J, C7021B/C/J, C7023B/C/J, C7041B/C/J  
can be mounted in a duct to sense air temperature.  
1. Read these instructions carefully. Failure to follow them  
could damage the product or cause a hazardous  
condition.  
IMPORTANT  
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.  
Select a spot for the sensor where it will be exposed  
to average duct air temperature. Avoid locations  
where stratification can cause sensing errors.  
C7021B,C/C7023B/C, C7041B/C MOUNTING  
1. Cut a hole in the duct just large enough to accept the  
sensing element.  
2. Use the sensor case to mark the locations of the pilot  
holes for the mounting screws.  
3. Drill the pilot holes and fasten the sensor to the duct.  
63-2590—05  
8
 
SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
C7021J, C7023J, C7031J, C7041J MOUNTING  
C7021R, C7023R, C7041R MOUNTING  
1. Install two supports inside the duct to hold the  
averaging element.  
SENSOR  
SENSING ELEMENTS (4)  
2. Cut a 7/8 in. (22 mm) hole in the side of the duct.  
3. Insert the averaging element into the duct through the  
hole.  
4. Fasten the terminal box to the outside of the duct and  
thread the element through the hole and into the duct.  
5. Use plastic wire ties to fasten the element to the  
supports. Seal the hole around the element with a rubber  
grommet.  
PLASTIC  
TIES (5)  
GROMMET  
(NOT  
INCLUDE)  
6. Secure the end of the element to the duct on the  
support to prevent continuous flexing or abrasion.  
COPPER TUBING  
1
WITH SENSING  
SUPPORTS (2)  
ELEMENTS (4 OR 9)  
M8929A  
DUCT  
SENSOR  
Fig. 11. Duct cross section showing method of installing  
C7021J, C7023J, C7031J, C7041J Averaging Electronic  
Sensor.  
PLASTIC  
TIES (5)  
1. Install two supports inside the duct to hold the averaging  
element.  
2. Cut a 7/8 in. (22 mm) hole in the side of the duct to insert  
the averaging element.  
3. Fasten the terminal box to the outside of the duct and  
thread the element through the hole and into the duct.  
4. Use plastic wire ties to fasten the element to supports.  
Seal the hole around the element with a rubber  
grommet.  
5. Secure the end of the element to the duct on the  
support to prevent continuous flexing or abrasion.  
DUCT  
SUPPORTS (2)  
1
NUMBER OF ELEMENTS DEPENDS  
ON LENGTH OF COPPER TUBING.  
M22820  
IMPORTANT  
Fig. 13. Duct cross section showing method of installing  
C7021R, C7023R, C7041R Averaging Electronic Sensor.  
To assure that the C7021J, C7023J, C7031J, C7041J  
senses average duct temperature, position the  
temperature elements approximately as shown in Fig.  
11. Do not allow the elements to touch or be close to  
the duct sides.  
IMPORTANT  
To ensure that the C7021R, C7023R, C7041R senses  
average duct temperature, position the temperature  
elements approximately as shown in Fig. 13. Do not  
allow the elements to touch or be close to the duct  
sides.  
NOTE: When the sensor is used as a deck sensor in a  
multizone system, be sure to space the elements  
equally in the duct midstream as shown in Fig. 12.  
NOTE: When the sensor is used as a deck sensor in a  
multizone system, be sure to space the elements  
equally in the duct midstream as shown in Fig. 14.  
Install one C7021J, C7023J, C7031J, C7041J just upstream  
from the cold deck zone dampers and the other C7021J,  
C7023J, C7031J, C7041J upstream from the hot deck zone  
dampers. Position the thermistors to sense the average deck  
temperature.  
Install one C7021R, C7023R, C7041R just upstream from the  
cold deck zone dampers and the other C7021R, C7023R,  
C7041R upstream from the hot deck zone dampers. Position  
the thermistors to sense the average deck temperature.  
SENSOR  
SENSING ELEMENTS (4)  
COPPER TUBING WITH  
SENSING ELEMENTS (4 OR 9)  
SENSOR  
1
M8928A  
GROMMET  
(NOT FURNISHED)  
DUCT  
Fig. 12. Duct cross section showing method of installing  
C7021J, C7023J, C7031J, C7041J in a multizone system.  
DUCT  
1
NUMBER OF ELEMENTS DEPENDS  
ON LENGTH OF COPPER TUBING.  
M22819  
Fig. 14. Duct cross section showing method of installing  
C7021R, C7023R, C7041R in a multizone system.  
9
63-2590—05  
 
       
SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
makes contact before mounting (remove insulation from the  
pipe at the point of installation if necessary). Thermal  
compound is recommended with the strap-on C7021K,  
C7023K, C7041K Sensor. Locate the sensor on the discharge  
pipe within 3 feet (0.9m) of the boiler. See Fig. 16.  
Immersion Well Mounting (C7021D,  
C7023D, C7031D, C7041D)  
The C7031D Sensor includes an immersion well. The C7021D,  
C7023D, and C7041D sensors do not include a well. For the  
C7021D, C7023D, and C7041D, order the well as an  
accessory (part no.: 50001774-001).  
When used on a boiler, follow the manufacturer instructions for  
location. If a tapped hole is not provided for the immersion well,  
provide one as follows:  
SENSOR  
1. Drain boiler and drill a 23/32 in. (18 mm) hole at the  
PIPE  
COPPER PLATE MUST  
MAKE GOOD CONTACT  
WITH METAL PIPE  
selected location.  
2. Cut threads in the hole with a 1/2 in. (13 mm) by 14 NPT  
tap.  
In other installations, mount the immersion well in an elbow  
with a heel outlet as shown in Fig. 15.  
1. Drain the system, if you have not already done it, and  
open the tapped hole.  
2. Put pipe joint compound on the threads of the  
immersion well and screw it into the tapped hole or  
elbow, tightening it securely.  
3. Refill the system and check for leaks.  
WORM GEAR  
M22136  
Mount the C7021D, C7023D, C7031D and C7041D into the  
well:  
Fig. 16. Strap-on mounting of C7021K, C7023K, C7041K  
Sensor.  
NOTE: Mounting using previously installed Honeywell  
wells (part no.: 32005960-001) requires an  
adapter (part no.: 50001775-001).  
NOTE: Insulation around the contact area increases sensor  
accuracy.  
1. When an adapter is required, first thread it into the well  
no more than one or two turns.  
2. Slide the sensor into the well.  
Button Probe Mounting  
The C7021P, C7023P, C7041P Button Probe Sensor design  
simplifies mounting into a variety of standard structural  
materials.  
3. Rotate the sensor to thread it tightly into the adapter and  
the adapter tightly into the well.  
The locking nut can be used to secure the probe. See Fig. 18.  
SENSING ELEMENT  
(SEALED IN STAINLESS STEEL  
TUBE INSIDE OF INSERTION WELL)  
The plastic spacer helps insulate the probe from drywall, wood,  
or other material in which the probe is mounted. The spacer is  
sized to fit snugly into 1/2 in. metal conduit. See Fig. 17.  
1/2 NPT (13)  
NOTES:  
The plastic spacer is threaded for easy installation.  
Use of both the locking nut and spacer requires  
cutting spacer to shorter length.  
C7041P MOUNTING RECOMMENDATIONS  
Determine the proper location based upon the following:  
— Mount the probe to an inside wall approximately 54 in.  
(1372 mm) from the floor (or in the specified location) to  
allow exposure to the average zone temperature.  
— Do not mount the probe to an outside wall, a wall containing  
waterpipes, or near air ducts.  
M22135  
Fig. 15. Method of mounting C7021D, C7023D, C7031D,  
C7041D Sensor.  
— Avoid locations exposed to register discharge air, or  
radiation from lights, appliances, or the sun.  
Strap-On Mounting (C7021K, C7023K,  
C7041K)  
Strap-on mounting is well-suited for retrofit applications where  
installation costs can be reduced by not draining the system.  
The C7021K, C7023K, C7041K Sensor mounts on metal pipes  
from 1-5/8 inch to five inches in diameter using the straps  
supplied. Clean the surface of the pipe where the sensor  
M22797  
Fig. 17. Mounting sensor in conduit.  
63-2590—05  
10  
 
   
SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
CAUTION  
Electrical Shock or Equipment Damage Hazard.  
Can shock individuals or short equipment  
circuitry.  
WALL  
Disconnect power supply before installation.  
IMPORTANT  
1. All wiring must agree with applicable codes,  
ordinances and regulations.  
2. Do not mount sensor in incorrect environment.  
3. Wire according to the applicable controller  
instructions.  
OPERATION AND CHECKOUT  
Operation  
M22799  
The C7041 Temperature Sensors are designed for use with  
XL500, XL100, XL50, XL15, XL10, and Honeywell LCBS  
Controllers or any controller requiring 20K ohm NTC  
non-linear input. As the temperature at the C7041 Sensor  
increases, the resistance of the sensor decreases, causing the  
controller to operate and offset the temperature change.  
Fig. 18. Mounting sensor in wall with nut only.  
Bullet Probe Sensor Mounting (C7021N,  
C7023N, C7041N)  
The bullet probe sensor is a water-resistant sensor that  
provides a cost-effective solution for surface contact  
temperature measurement of conditioned water pipes, low  
pressure steam or refrigerant lines. These sensors are ideal for  
applications where immersion wells are not practical to install.  
These sensors can also be use to sense air temperature.  
The C7021 Temperature Sensors are designed for use with the  
TB7600, TB7300, and TB7200 Series Communicating  
Thermostats or any controller requiring a 10K ohm NTC Type II  
input.  
The C7023 Temperature Sensors are designed for use with  
WEBs-AX I/O Modules or any controller requiring a 10K ohm  
NTC Type III input.  
Checkout  
WIRING  
Refer to the applicable controller instructions when checking  
out the complete heating and cooling systems.  
CAUTION  
Failure to follow proper wiring practices can  
introduce disruptive electrical interference (noise).  
Keep wiring at least one foot away from large inductive  
loads such as motors line starters, lighting ballasts,  
and large power distribution panels.  
To check out the sensors, move the thermostat or remote  
setpoint potentiometer below the temperature of the cooling or  
heating medium. Watch the motor, valve or damper for the  
correct movement.  
Erratic System Operation Hazard.  
Shielded cable is required in installations where these  
guidelines cannot be met.  
Ground shield only to grounded controller case.  
11  
63-2590—05  
 
SERIES 2000 ELECTRONIC TEMPERATURE SENSORS  
Automation and Control Solutions  
Honeywell International Inc.  
1985 Douglas Drive North  
® U.S. Registered Trademark  
Golden Valley, MN 55422  
customer.honeywell.com  
© 2011 Honeywell International Inc.  
63-2590—05 M.S. Rev. 08-11  
Printed in United States  
 

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