Honeywell 2000 Series Electronic Temperature Sensors Instruction Manual

Honeywell 2000 Series Electronic Temperature Sensors Instruction Manual

APPLICATIONS & SELECTION

The Series 2000 electronic temperature sensors offer a full range of temperature seniors for outdoor, immersion, duct, pipe, and wall temperature sensing.

For more information on Honeywell’s complete sensor offering download the Sensors Product Overview brochure (63-9285) from customer.honeywell.com.

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 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.

Mounting

The mounting method depends on the particular sensor application. The following procedures include:
— duct applications
— outdoor applications
— immersion well applications
— strap-on applications

NOTE: Also refer to the instructions for the electronic control.

Duct Mounting (C7021B/C, C7023B/C, C7041B/C)

IMPORTANT Select a spot for the sensor that will expose it to average duct air temperature. Avoid locations where stratification can cause sensing errors.

1. Cut a hole in the duct just large enough to accept the sensing element.
2. Use the sensor’s case to mark locations of pilot holes for the mounting screws.
3. Drill pilot holes and fasten the sensor to the duct.

Outdoor Mounting (C7021F, C7023F, C7031G, C7041F; T775-SENS-OAT)

The C7021F, C7023F, C7031G, C7041F, and T775SENS-OAT outdoor air temperature sensors have a weather-proof enclosure. Mount the sensor where it can sense average outdoor air temperature. All mounting hardware is provided with the sensor. Be sure to mount the sensor out of direct sunlight with the sensor probe point down. Normally, the north side of a building provides a suitable location.

NOTE: C7021F, C7023F, C7031G, C7041F, and T775SENS-OAT are weatherproof for outdoor use. Knockouts allow for 1/2 in. conduit connection.

1. Remove and set aside the wiring box cover.

2. Mount the sensor to a standard 1/2 in. conduit.
   NOTE: Mount sensor so that the element points down.

3. Make wiring connections using two wire nuts.

4. Reattach the wiring box cover.

Immersion Well Mounting (C7021D, C7031D, C7031D, C7041D)

NOTE: The C7021D, C7023D, C7041D uses the 50001774-001 Well Assembly. See Fig. 5 for dimensions.
The C7031D Sensor includes an immersion well. The C7021D, C7023D, C7041D Sensors do not include a well; 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:

1. Drain boiler and drill a 23/32 in. (18 mm) hole at the 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. 3.

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.
   Mount the C7021D, C7023D, C7031D/C7041D into the well:

NOTE: Mounting using previously installed Honeywell wells (part no.: 32005960-001) requires an adapter (part no.: 50001775-001).

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.
3. Rotate the sensor to thread it tightly into the adapter and the adapter tightly into the well.

Strap-on Mounting (C7021K, C7023K, C7041K, T775-SENS-STRAP)

The C7021K, C7023K, C7041K and T775-SENS-STRAP Sensor mounts on metal pipes from 1-5/8 inch to 5 inches in diameter using the straps supplied. Clean the pipe surface where the sensor makes contact before mounting. If necessary, remove pipe insulation at the installation point. Thermal compound is recommended. Locate the sensor on the discharge pipe within 3 ft. (0.9 m) of the boiler. See Fig. 6.
NOTE: Insulation around the contact area increases sensor accuracy.

Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 customer.honeywell.com

® U.S. Registered Trademark © 2011 Honeywell International Inc. 62-0220–05 M.S. Rev. 06-11 Printed in United States

References

• Building Automation

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