KMC STE-6000 Series Room Sensor and Thermostat User Guide

STE-6000 Series Room Sensor and Thermostat

Room Sensor and Thermostat
Mounting and Maintenance Application Guide

KMC Room Sensors and Thermostats

KMC Controls manufactures a variety of pneumatic, analog electronic, and digital room sensors and thermostats. Some sense only temperature, while others also add humidity, motion, and/or CO2 sensing. This document covers general principles for mounting and maintenance of room (temperature, humidity, motion, and CO2 ) sensors.

KMC also sells other kinds of sensors (e.g., duct, airflow, smoke, carbon monoxide, pressure) that are not covered by this document.
For additional general information about sensors, see the following information on the KMC website.

• Sensor and Thermostat Selection Fundamentals White Paper
• Sensor and Thermostat Selection Guide
• How Hot Do You Feel? (Humidity Effects, Sensing, and Control)
• (CO2) Demand Control Ventilation Benefits for Your Building White Paper

Handling Precautions

For digital and electronic sensors, thermostats, and controllers, take reasonable precautions to prevent electrostatic discharges to the devices when installing, servicing or operating them. Discharge accumulated static electricity by touching one’s hand to a securely grounded object before working with each device.

Mounting Plates/Adapters

For mounting to various sizes of electrical boxes or other openings, KMC Controls sells mounting plates/adapters designed for various models of sensors.
NOTE: Light almond plates are not for white “W” model sensors.

For BAC-12xxxx, BAC-4xxxCW000x, and STE-9xxx

HMO-10000W White (shown), for mounting BAC12xxxx FlexStats (not needed for BAC-13xxxx/14xxxx models), BAC4xxxCW000x AppStats, and STE-9xxx NetSensors to
horizontal 2 x 4 inch horizontal or 4 x 4 inch electrical boxes
HMO-10000  Light almond

For KMD-116x/118x/12×1 and STE-8×01

HMO-1161 Light almond (shown), for mounting  KMD-116x/118x/12×1 and STE- 8x01NetSensors to 4 x 4 or horizontal 2 x 4 inch electrical boxes
HMO-1161 W White

For KMD-1151/1171

HMO-5042 Light almond (shown), for mounting (discontinued) KMD-1151/1171 NetSensors to 4 x 4 or horizontal 2 x 4 inch electrical boxes
HMO-5043 White For STE-6xxx and THE-1102

HMO-6036 Light almond (shown), for mounting STE- 6xxx temperature sensors and THE-1102 humidity transmitters with temperature sensors to 2 x 4-inch electrical boxes
HMO-6036 W White

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For THE-1105, CTE-51xx, and CTC-16xx

NOTE: These backplate kits are for THE-1105 humidity transmitters with temperature sensors, CTE-51xx electronic thermostats, and CTC-16xx pneumatic thermostats. The kits allow the thermostats to be mounted to 2 x 4-inch electrical boxes or to adapt to Barber-Colman, Johnson Controls, L&G-P, or Robertshaw/Invensys mounting plates.

HMO-5024 Light almond with aluminum trim (shown)
HMO-5026 White with aluminum trim
HMO-5030 Light almond
HMO-5031 White

Mounting for Optimal Temperature Sensing

For effective temperature sensing, mount the thermostat or sensor in a location enabling it to sense the general room environment. The thermostat or sensor must NOT be:

• Blocked from normal air circulation by obstructions (e.g., behind curtains or cubicle walls).
• Exposed to artificial heat sources (e.g., lights, computers, copiers, or coffee makers) or to sunlight (at any time of the day).
• Exposed to drafts from windows, doorways, diffusers, or returns.
• Exposed to airflow through the conduit (e.g., from leaks in plenum ducts) or other holes into the wall cavity. See Reducing Temperature Sensing Errors on page 6.
• Mounted on an exterior wall. See Reducing Temperature Sensing Errors on page 6.
• Mounted on or near a large thermal mass (e.g., a concrete block wall). See Reducing Temperature Sensing Errors on page 6.
• Mounted in or near a corner. See Minimum Distance from Corners on page 3.

NOTE: The above factors primarily affect temperature sensing, but some also affect accurate humidity and CO2 sensing as well.

Mounting for Optimal Motion Sensing

For motion sensing models, mount the sensor on a wall that will have an unobstructed view of the typical traffic in the coverage area. Some of the issues that affect temperature sensors also affect motion sensors. ( See Mounting for Optimal Temperature Sensing on page 3.) When choosing a location, the motion sensor must NOT be:

• Behind curtains or other obstructions.
• In locations exposed to direct sunlight or heat sources.
• Near a heating or cooling inlet or outlet.

Situations that would need additional remote motion sensors (the third party, purchased separately) to be connected to the controller include:

• Areas with obstructions that block sensor coverage.
• Areas too large for adequate coverage by the sensor/thermostat’s single built-in sensor.

NOTE: Using remote sensors requires custom programming in most controllers. For information about using integrated and selectable remote motion sensors in a FlexStat, see the FlexStat Application Guide.

For KMC motion sensors, the effective detection range is approximately 33 feet (10 meters). Factors that may reduce the range may include the following items.

• Too small of difference between the surface temperature of the object and the background temperature of the room.
• Object movement in a direct line toward the sensor.
• Very slow or very fast object movement.
• Obstructions in the (horizontal or vertical) sensing area. See Typical Motion Sensor Pattern on page 5.

False detections may be triggered by any of the following conditions.

• The temperature inside the detection range suddenly changes because of the entry of cold or warm air from an air-conditioning or heating unit.
• The sensor is directly exposed to sunlight, an incandescent light, or another source of infrared rays.
• Small animal movement.

Mounting Height

Traditionally, thermostats and room temperature sensors have been mounted approximately 60 inches (152 cm) from the floor. This has been considered an effective height to measure the room temperature and to allow a person to adjust a setpoint while standing.

However, for thermostats (and sensors with adjustable setpoint controls), the Americans with Disabilities Act (ADA) has rules to ensure that public lodging spaces and facilities remain accessible to the disabled. (They do not apply to private homes that rent fewer than five rooms.) To ensure that people in wheelchairs can reach and adjust the setpoint without assistance, ADA rules specify thermostat placement to be no higher than 48 inches (121 cm) above the floor (assuming no other obstructions are below it).

BEFORE running a conduit and installing a thermostat, check the specific details of any applicable compliance requirements!

Troubleshooting (Location)

To correct or compensate for sensing problems caused by mounting issues:

• Reposition the sensor or the surrounding obstructions. See M ounting for Optimal Temperature Sensing on page 3 and Mounting for Optimal Motion Sensing on page 4.
• Insulate the sensor from air leakage and heating/cooling sources. See Reducing Temperature Sensing Errors on page 6 and Mounting Components and Height on page 5.
• Adjust the sensor calibration to offset the environmental issues. See the instructions for the sensor and/or configuration software.

Inaccurate sensing may also be caused by one a variety of electrical or configuration issues. See the installation and/or application guide of the sensor for those factors.

Reducing Temperature Sensing Errors

Best Practices

• Air movement between the conditioned space and the conduit and/or wall cavity can skew sensor readings. Apply sealant inside the conduit and other holes to block air leakage. See Mounting Components and Height on page 5.
• Mounting on an exterior wall will allow varying outside conditions to affect the sensor’s readings. Mounting on or near a large interior thermal mass (e.g., concrete block wall) can slow the sensor’s response to room air temperature changes. These mounting areas should be avoided, but a foam gasket (e.g., HPO-1161 or HPO-9002) mounted behind the backplate may help insulate the sensor from a less-than-optimal wall surface. See Mounting Insulators on page 7, Mounting Components and Height on page 5, and the accessories available for the applicable product.

NOTE: A foam gasket may also help block air leakage from the wall cavity.

NOTE: The notch in the HPO-9002 gasket should match the location of the notch in the STE-9000 series NetSensor case. (AppStats, on the other hand, do not have a notch in the case.)
NOTE: Older CTE-1000/1100 series thermostats and TTE-1001 transmitters have plastic extenders to help insulate them from the wall’s surface.

• After reducing environmental issues as much as possible, calibrate the sensor (controller or thermostat input) for maximum accuracy within its environment. See the relevant product calibration procedure to provide the optimal offset. (Wait until the sensor has been operating for at least half an hour before calibrating it.)
• See also Mounting for Optimal Temperature Sensing on page 3.

Mounting Insulators

HPO-1161 Foam insulating gasket for KMD-116x/118x/12×1 and STE-8×01 NetSensors (mounts between the black backplate and the electrical box)
HPO-9002 Foam insulating gasket for STE-9xx1 NetSensors HMO-5002 Light almond (shown) backplate extender and insulator, 1-1/8 inches deep, for CTE- 1xxx thermostats, CTE-11xx thermostats, and TTE-1001 transmitters

HMO-5012 White, 1-1/8 inches deep
HMO-5007 Light almond (shown), 1-11/16 inches deep
HMO-5013 White, 1-11/16 inches deep

Maintenance

To maintain accurate temperature and humidity sensing, remove dust as necessary from the ventilation holes in the top and bottom of the case. To clean the case or display, use a soft, damp cloth (and mild soap if necessary).

Clean Case Holes and Surface

To maintain maximum sensitivity of the built-in motion sensor , occasionally wipe dust or dirt off the lens—but do not use any fluid on the sensor.

CO2 sensors designed for continuous occupation applications, such as in the BAC-14xxxx FlexStats, require periodic calibration with gas to maintain long-term accuracy. See the CO2 calibration section in the FlexStat Application Guide for more information.
NOTE: BAC-13xxxx FlexStats and most other KMC CO2 sensors are designed to operate in areas where CO2 levels periodically fall to outside levels during unoccupied periods. Such models self-calibrate over time, and calibrating them with gas may not be necessary or even feasible.

Important Notices

The KMC logo and KMC Controls are registered trademarks of KMC Controls, Inc. Other products and name brands mentioned may be trademarks of their respective companies or organizations.
All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form by any means without the written permission of KMC Controls, Inc.
The material in this document is for information purposes only. The contents and the product it describes are subject to change without notice. KMC Controls, Inc. makes no representations or warranties with respect to this document. In no event shall KMC Controls, Inc. be liable for any damages, direct or incidental, arising out of or related to the use of this document.

Support

Additional resources for product specifications, installation, configuration, application, operation, programming, upgrading, and much more are available on the KMC Controls website (www.kmccontrols.com). Log in to see all available files.

AG150119F
© 2021 KMC Controls, Inc.
Specifications and design subject to change without notice

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