Honeywell Home THX9421R5021WW Prestige Thermostat
SPECIFICATIONS
Thermostat Description:
| Feature | Description |
| Powering method | • Common wire only |
| System types (up to 4 heat/2 cool heat pump and up to 3 heat/2 cool conventional) | • Gas, oil or electric heat with air conditioning • Warm air, hot water, high- efficiency furnaces, heat pumps, steam and gravity • Cool only |
| Changeover | Manual or Auto changeover selectable |
| System setting | Em Heat-Heat-Off-Cool-Auto |
| Fan setting | Auto-On-Circ-Follow Schedule |
Electrical Ratings for: Equipment Interface Module and the THX9321 Prestige 2.0 Thermostat
NOTE: To find what terminals are available on the Equipment Interface Module and the Prestige Thermostats, see “Terminal Designations” below the table.
| Terminal | Voltage (50/60 Hz) | Max. Current Rating |
| W – O/B | 18 to 30 VAC | 1.00A |
| Y (cooling) | 18 to 30 VAC | 1.00A |
| G (fan) | 18 to 30 VAC | 0.50A |
| W2 – Aux 1 (heating) | 18 to 30 VAC | 0.60A |
| W3 – Aux 2 (heating) | 18 to 30 VAC | 0.60A |
| Y2 (cooling) | 18 to 30 VAC | 0.60A |
| A-L/A (Output) | 18 to 30 VAC | 1.00A |
| U1, U1 U2, U2 U3, U3 | 18 to 30 VAC | 0.50A |
Terminal Designations:
- Equipment Interface Module: R, RC, RH, C, W-O/B, W2-AUX 1, W3-AUX 2, Y, Y2, G, A-L/A, U1 U1, U2 U2, U3 U3, S1 S1, S2 S2, S3 S3, S4 S4, A, B, C, D
- THX9421 Thermostat: R, C
- THX9321 Thermostat: R, RC, C, W-O/B, W2-AUX/E, Y, Y2, G, A-L/A, K, U1 U1, U2 U2
Power Consumption of THX9421/THX9321:
- Full brightness = 3.0 VA
- 1/2 brightness = 2.1 VA
- Backlight off = 1.9 VA
RedLINK Communication:
- Frequency: 900 Mhz frequency range
- Re-Sync Time: RedLINK devices re-establish communication within 6 minutes after AC power resumes.
Temperature Setting Range:
- Heating: 40 to 90°F (4.5 to 32 °C).
- Cooling: 50 to 99 °F (10 to 37 °C).
Temperature Sensor Accuracy:
± 1.5 °F at 70 °F (0.75 °C at 21.0 °C)
Humidification Setting Range:
10% to 60% RH.
Dehumidification Setting Range:
40% to 80% RH.
Humidity Display Range:
0% to 99%.
Humidity Sensor Accuracy:
± 5% RH from 30% to 50% RH at 75 °F (24 °C).
Cool Indication:
Prestige 2.0 and Prestige IAQ displays “Cool On” when the thermostat turns the cooling on.
Heat Indication:
Prestige 2.0 and Prestige IAQ displays “Heat On” when the thermostat turns the heating on.
Auxiliary Heat Indication:
Prestige 2.0 and Prestige IAQ displays “Auxiliary Heat On” when the thermostat turns the auxiliary heat on.
Interstage Differential:
Comfort: The thermostat keeps the indoor temperature within 1 degree of the setpoint (droop less control). The thermostat turns on stage 2 when the capacity on stage 1 reaches 90%. When the interstage differential is set to 1.0 or higher, the thermostat stages the equipment based on how far the indoor temperature is from the setpoint (ISU 3030 to 3090). See page 31 for more information.
Clock Accuracy:
± 1 minute per month at 77°F (25 °C). ± 2 minutes per month over the operating ambient temperature
range.
Mounting Means:
Thermostat mounts directly on the wall in the living space using mounting screws and anchors provided. Fits a horizontal 2 x 4 in. junction box. The Equipment Interface Module (EIM) mounts on HVAC equipment or on a wall in the equipment room.
Table 1. Prestige Kits.
| Kit Part Number | Included in Kit | |
| Part Number | Description | |
| Prestige IAQ Kit YTHX9421R5101WW | THX9421R5021WW | Thermostat – White Front, White Side |
| THM5421R1021 | Equipment Interface Module | |
| C7089R1013 | Wireless Outdoor Sensor | |
| 50062329-001 | Discharge/Return Sensors (Qty. 2) | |
| Prestige IAQ Kit YTHX9421R5085WW | THX9421R5021WW | Thermostat – White Front, White Side |
| THM5421R1021 | Equipment Interface Module | |
| 50062329-001 | Discharge/Return Sensors (Qty. 2) | |
| Prestige IAQ Kit YTHX9421R7001WW | THX9421R5021WW | Thermostat – White Front, White Side |
| THM5421R1021 | Equipment Interface Module | |
| 50062329-001 | Discharge/Return Sensors (Qty. 2) | |
| THM6000R7001 | RedLINK Internet Gateway | |
| C7189R1004 | Wireless Indoor Temperature/Humidity Sensor | |
| C7089R1013 | Wireless Outdoor Temperature/Humidity Sensor | |
Table 2. Thermostat Replacement Parts and Accessories.
| Product | Part Number | Operating Ambient Temperature | Operating Relative Humidity | Shipping Temperature | Physical Dimensions in in. (mm) | Color(s) |
| Thermostat | THX9421R5021WW | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 4-1/2 x 3-1/2 x 7/8 (115 x 88 x 22) | Front- White, Side-White |
| THX9421R5021BB OBSOLETE | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 4-1/2 x 3-1/2 x 7/8 (115 x 88 x 22) | Front- Black, Side-Black | |
| THX9421R5021SG OBSOLETE | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 4-1/2 x 3-1/2 x 7/8 (115 x 88 x 22) | Front- Silver, Side- Gray | |
| THX9421R5021WG OBSOLETE | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 4-1/2 x 3-1/2 x 7/8 (115 x 88 x 22) | Front- White, Side-Gray | |
| THX9321R5030 OBSOLETE | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 6-13/16 x 3-7/8 x 1-7/16 (173 x 99 x 36) | Arctic White | |
| Equipment Interface Module | YTHM5421R1010* THM5421R1021 | -40 to 165 °F (-40 to 73.9 °C) | 5% to 95% Non-Condensing | -20 to 165 °F (-28.9 to 73.9 °C) | 9-11/32 x 4-53/64 x 1- 19/32 (237 x 123 x 41) | Gray |
| Equipment remote module | ERM5220R1018 | Compressor: -40 to 155 °F (-40 to 68 °C) Boiler: | 0% to 99% Non-Condensing | -20 to 165 °F (-28.9 to 73.9 °C) | 6-39/64 x 6-7/8 x 1- 31/64″ (168 x 175 x 38) | Gray |
| 30 to 130 °F | ||||||
| (-1 to 54 °C) | ||||||
| Wireless Adapter (For TrueZONE, TrueSTEAM or | THM4000R1000 | -40 to 165 °F (-40 to 73.9 °C) | 5% to 95% Non-Condensing | -20 to 165 °F (-28.9 to 73.9 °C) | 5-9/16 x 4-3/8 x 1-1/4 (141 x 112 x 32) | Gray |
| extend wireless | ||||||
| range of EIM) | ||||||
| RedLINK Internet Gateway | THM6000R1002 OBSOLETE | 32 to 120 °F (0 to 48.9 °C) | 5% to 95% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 6 x 4-7/8 x 2-1/2 (152 x 124 x 64) | Black |
| RedLINK Internet Gateway | THM6000R7001 | 32 to 120 °F (0 to 48.9 °C) | 5% to 95% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 3-7/8 x 3-9/16 x 1-1/8 (99 x 91 x 29 mm) | White |
| Portable Comfort Control | REM5000R1001 | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 6-1/4 x 3-1/8 x 1-5/8 (158 x 80 x 38) | Front- White, Side-Gray |
| Wireless Entry/Exit Remote | REM1000R1003 | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 3-15/16 x 1-15/16 x 5/8 (101 x 50 x 16) | Arctic White |
| Wireless Vent and Filter Boost Remote | HVC20A1000 | 32 to 120 °F (0 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 3-15/16 x 1-15/16 x 5/8 (101 x 50 x 16) | Arctic White |
| Wireless Outdoor Sensor | C7089R1013 | -40 to 140 °F (-40 to 60 °C) | 0% to 100% Condensing | -40 to 120 °F (-40 to 48.9 °C) | 5 x 3-1/2 x 1-11/16 (127 x 89 x 43) | Gray |
| Wireless Indoor Sensor | C7189R1004 | 0 to 120 °F (-17.8 to 48.9 °C) | 5% to 90% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 2-7/8 x 1-7/8 x 15/16 (74 x 48 x 24) | Arctic White |
| For optimal Battery Life: 35 to 114 °F (1.7 to 45.6 °C) | ||||||
| Wired Outdoor Sensor (10K ohm | C7089U1006 | -40 to 120 °F (-40 to 48.9 °C) | 5% to 95% Non-Condensing | -40 to 130 °F (-40 to 54.4 °C) | 1-1/2 (38) | – – |
| Negative | ||||||
| Temperature | ||||||
| Coefficient) | ||||||
| Wired Wall Mount Indoor Sensor (10K ohm Negative Temperature Coefficient) | C7189U1005 | 45 to 88 °F (7 to 32 °C) | 5% to 95% Non-Condensing | -20 to 120 °F (-28.9 to 48.9 °C) | 2-9/32 x 1-1/2 x 11/16 (58 x 38 x 18) | Premier White |
| Product | Part Number | Operating Ambient Temperature | Operating Relative Humidity | Shipping Temperature | Physical Dimensions in in. (mm) | Color(s) |
| Wired Wall Mount Indoor Sensor (20K ohm | TR21 | 45 to 99 °F (7 to 37 °C) | 5% to 95% Non-Condensing | -40 to 150 °F (-40 to 65.5 °C) | 4-9/16 x 3 x 7/8 (116 x 76.5 x 22) | White |
| Negative | ||||||
| Temperature | ||||||
| Coefficient) | ||||||
| Wired Wall Mount Indoor Sensor (10K ohm | TR21-A | 45 to 99 °F (7 to 37 °C) | 5% to 95% Non-Condensing | -40 to 150 °F (-40 to 65.5 °C) | 4-9/16 x 3 x 7/8 (116 x 76.5 x 22) | White |
| Negative | ||||||
| Temperature | ||||||
| Coefficient) | ||||||
| Wired Flush Mount Indoor Sensor (20K ohm Negative Temperature Coefficient) | C7772A1004 | 45 to 99 °F (7 to 37 °C) | 5% to 95% Non-Condensing | -40 to 150 °F (-40 to 65.5 °C) | 4-1/2 x 2-3/4 x 5/16 (114 x 70 x 8) | Brushed Stainless Steel |
| Wired Flush Mount Indoor Sensor (20K ohm Negative Temperature Coefficient) | C7772A1012 | 45 to 99 °F (7 to 37 °C) | 5% to 95% Non-Condensing | -40 to 150 °F (-40 to 65.5 °C) | 4-1/2 x 2-3/4 x 5/16 (114 x 70 x 8) | Brushed Stainless Steel |
| Discharge or Return Air Sensor (10K ohm Negative Temperature Coefficient) | C7735A1000* | 0 to 200 °F (- 17.8 to 93.3 °C) | – – | -20 to 120 °F (-28.9 to 48.9 °C) | Probe: 3-3/4 x 1/4 (77 x 6.4) Cap Diameter: 2-7/16 (62) | Gray |
| Discharge or Return Air Sensor | C7041 | – – | – – | – – | 4-3/16 x 2-5/16 x 1- 11/16 | – – |
| (20K ohm Negative | (107 x 59 x 43) | |||||
| Temperature | ||||||
| Coefficient) | ||||||
| Discharge or Return Air Sensor (20K ohm | C7770A1006 | 45 to 99 °F (7 to 37 °C) | 5% to 95% Non-Condensing | -40 to 150 °F (-40 to 65.5 °C) | Probe: 6 x 1/4 (152 x 6.4) | – – |
| Negative | ||||||
| Temperature | ||||||
| Coefficient) | ||||||
| Occupancy Sensor for Remote | WSK-24 | Receiver: – 5 to 140 °F | – – | – – | Receiver: 3.6 x 3.4 x 1.2 | White |
| Setback (Requires an Equipment | (-21 to 60 °C) Door Sensor: | (91.4 x 86.4 x 30.5) Door Sensor: | ||||
| Interface Module) | -4 to 140 °F (-20 to 60 °C) | 1.4 x 2.3 x 0.6 (35.8 x 57.6 x 15.2) | ||||
| PIR Sensor: | PIR Sensor: | |||||
| -4 to 104 °F | 2.8 x 3.9 x 1.1 | |||||
| (-20 to 40 °C) | (71 x 100 x 28) | |||||
| THX9421 Coverplate | THP2400A1027W (Includes 2 cover | – – | – – | – – | Small = 5-33/64 x 4- 21/64 (140 x 110), Large | White |
| (covers marks left by old | plates) | = 6-7/8 x 5 (175 x 127) | ||||
| thermostats) | ||||||
| THX9421 Coverplate | THP2400A1027B (Includes 2 cover | – – | – – | – – | Small = 5-33/64 x 4- 21/64 (140 x 110), Large | Black |
| (covers marks left by old | plates) | = 6-7/8 x 5 (175 x 127) | ||||
| thermostats) | ||||||
| THX9421 Coverplate | THP2400A1027G (Includes 2 cover | – – | – – | – – | Small = 5-33/64 x 4- 21/64 (140 x 110), Large | Gray |
| (covers marks left by old | plates) | = 6-7/8 x 5 (175 x 127) | ||||
| thermostats) |
| Product | Part Number | Operating Ambient Temperature | Operating Relative Humidity | Shipping Temperature | Physical Dimensions in in. (mm) | Color(s) |
| THX9321 Coverplate (covers marks left by old thermostats) | 50028399-001 | – – | – – | – – | 7-29/32 x 5-1/2 (201 x 140) | White |
| C-wire adapter | THP9045A1098 | -40 to 163 °F (-40 to 73 °C) | 5% to 90% Non-Condensing | -40 to 185 °F (-40 to 85 °C) | – – | Gray |
* Prestige IAQ Kits and YTHM5421R1010 Kit include 50062329-001 Discharge/Return Air Sensors. Replacement Discharge/Return Air Sensor part number is C7735A1000.
SYSTEM INSTALLATION
When Installing this Product…
- Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.
- Check the ratings given in the instructions to make sure the product is suitable for your application.
- Installer must be a trained, experienced service technician.
- After completing installation, use these instructions to verify the product operation.
Finding Your Password (Date Code)
You will need the thermostat password to:
- Make changes to the Installer Setup.
- Setup Diagnostics.
- Perform an Installer Test.
- View Data Logs.
- Add, remove, rename or view connected RedLINK accessories.
- Reset the thermostat to Factory Default settings. The password (Date Code) is located on the back of the thermostat. It can also be found by following these steps:
- Touch Menu.
- Select Dealer Information.
INSTALLATION OPTIONS
The THX9321 Prestige® 2.0 thermostat is wired directly to the equipment. The THX9421 Prestige® IAQ thermostat is used with the Equipment Interface Module or with a TrueZONE Wireless Adapter. If using the Equipment Interface Module, see “Installing Equipment Interface Module (if used)” beginning on page 10. If using a TrueZONE wireless adapter, follow the installation instructions that came with the TrueZONE, and go to “Selecting Thermostat Location” beginning on page 12.
Guidelines for Installing RedLINK Devices
- When installing more than one Thermostat and Equipment Interface Module, mount the Equipment Interface Modules at least 2 feet apart for best RedLINK performance. No minimum distance is required between the Thermostats if the Thermostat is linked to an Equipment Interface Module.
- When the Thermostat is wired directly to the equipment (No Equipment Interface Module and No TrueZONE Wireless Adapter), mount the Thermostat at least 2 feet apart for best RedLINK performance.
- To determine if a RedLINK device will communicate properly in the installed location, during the connection process, press and quickly release the connect button on the RedLINK device at the desired mounting location. If the RedLINK device connects, then it will work reliably during normal operation. If the RedLINK device does NOT connect, try a new location. During the connection process, the signal is sent at low power and during normal operation the signal is sent at high power.
- To connect a RedLINK device, make sure to press and quickly release the connect button on the RedLINK device. Press and holding the connect button down too long will not allow the device to connect.
- If you link the Thermostat to the TrueZONE Wireless Adapter, you will NOT be able to do the following: control humidification, dehumidification or ventilation, setup a program schedule remotely from a computer, smart phone or tablet, work with the Wireless Indoor Sensor, Entry / Exit Remote or the Vent and Filter Boost Remote. To use these features, wire the Thermostat directly to the zone panel or use an Equipment Interface Module.
- If you are using a RedLINK device from a previous installation, you must reset the device first before you reconnect it to the new Thermostat/Equipment Interface Module. See page 134 for more
information.
Installing Equipment Interface Module (if used)
If no Equipment Interface Module is used, skip to “Selecting Thermostat Location” beginning on page 12.
NOTE: If an EIM is mounted inside a metal cabinet, such as a commercial rooftop unit, it is recommended to use a THM4000R1000 Wireless Adapter for extended wireless range. Mount the Wireless Adapter outside the metal cabinet and connect to the ABCD terminals at the EIM. The Wireless
Adapter functions as a remote antenna for the EIM. After it is wired to the EIM, it automatically
takes over as the antenna for RedLINK communication. For best RedLINK performance, avoid mounting the Wireless Adapter above the roof deck or outside the exterior walls.
NOTE: If you install more than one thermostat and EIM,The EIMs must be at least 2 feet apart for best
RedLINK performance.
The Equipment Interface Module (EIM) can be mounted vertically on the HVAC equipment or on a wall in the equipment room.
- Mount the EIM near the HVAC equipment or on the equipment itself. Use screws and anchors as appropriate for the mounting surface..
- To wire the EIM, strip 1/4” insulation, then insert wires (see Fig. 9). For wiring diagrams, see “Wiring” beginning on page 134.
Wiring 24 Vac Common
- Single-Transformer System—Connect the common side of the transformer to the C screw terminal of the EIM. Leave the metal jumper wires in place between R, RC, and RH.
- Two-Transformer System—Connect the common side of the cooling transformer to the C screw terminal of the EIM. Remove the metal jumper wire between RC and RH. Connect the hot side of the heating transformer to RH and leave the jumper wire between R and RC and connect the hot side of the cooling transformer to R or RC.
Selecting Discharge and Return Air Temperature Sensor Mounting Locations
Refer to the guidelines below and Fig. 10–14 for mounting locations of the Discharge and Return Air Temperature Sensors.
Selecting Discharge Air Temperature Sensor Mounting Location
- Mount the Discharge Air Temperature Sensor on the supply duct in a location where the air is mixed well. Mount the Discharge Air Temperature Sensor out of sight of the A-Coil/Heat Exchanger when possible. See Fig. 10.
- When possible, mount the Discharge Air Temperature Sensor upstream of a Steam Humidifier, a Fan Powered Humidifier or a Dehumidifier that is ducted to the supply. See Fig. 11–12.
- If space does not allow a Discharge Air Temperature Sensor upstream of a Steam Humidifier or Fan Powered Humidifier, mount the Discharge Air Temperature Sensor downstream of the Humidifier. See Fig. 11. When setting the Delta T Limits (see “Set Delta T Limits” on page 87), be sure to consider the affect that the humidifier has on Delta T.
- If a Bypass Humidifier is installed, mount the Discharge Air Temperature Sensor downstream of the Bypass Humidifier. See Fig. 13–14.
Selecting Return Air Temperature Sensor Mounting Location
- Install the Return Air Temperature Sensor on the return duct in a location where the air is mixed well. Mount the Return Air Temperature Sensor downstream of a Bypass Humidifier, Dehumidifier or Ventilator. See Fig. 10–14.
Installing Discharge and Return Air Temperature Sensors
Use the following steps to mount the Discharge/Return Air Sensors:
- Attach the plastic cover to the sensor probe.
- Drill 1/4-inch hole for the sensor probe and mount it to the ductwork with enclosed screws (see Fig. 15).
- Connect wires to S1, S2, S3, or S4 terminals at the EIM.
- Setup the S1, S2, S3, or S4 terminals in the Installer Setup at the thermostat.
Selecting Thermostat Location
Install the thermostat about 5 ft. (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 16.
Do not install the thermostat where it can be affected by:
- Drafts or dead spots behind doors and in corners.
- Hot or cold air from ducts.
- Radiant heat from sun or appliances.
- Concealed pipes and chimneys.
- Unheated (uncooled) areas such as an outside wall behind the thermostat.
Installing Wallplate
The thermostat can be mounted horizontally on the wall or on a 4 in. x 2 in. (101.6 mm x 50.8 mm) wiring box.
- Separate wallplate from thermostat.
- Position and level the wallplate (for appearance only).
- Use a pencil to mark the mounting holes.
- Remove the wallplate from the wall and, if drywall, drill two 3/16-in. holes in the wall, as marked. For firmer material such as plaster, drill two 7/32-in. holes. Gently tap anchors (provided) into the drilled holes until flush with the wall.
- Position the wallplate over the holes, pulling wires through the wiring opening. See Fig. 18.
- Insert the mounting screws into the holes and tighten.
TROUBLESHOOTING
Table Troubleshooting.
| Symptom | Action |
| Screen is blank | • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. |
| Screen is difficult to read | • To change the screen brightness or color, see backlight options in the Preferences menu (see page 21). • At 2 am each day, thermostats change screen colors for an hour, to prevent burn-in. Touch the screen at any time to restore pre-set screen colors. |
| Heating or cooling system does not respond | • Press SYSTEM to set system to Heat. Make sure the temperature is set higher than the Inside temperature. • Press SYSTEM to set system to Cool. Make sure the temperature is set lower than the Inside temperature. • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. • If “Waiting For Equipment” is displayed, the compressor protection timer is on. Wait 5 minutes for the system to restart safely, without damaging the compressor. |
REGULATORY INFORMATION
FCC Compliance Statement (Part 15.19) (USA only)
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired
operation.
FCC Warning (Part 15.21) (USA only)
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b)) (USA only)
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used per the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Equipment interface module, thermostats, and outdoor sensor
To comply with FCC and Industry Canada RF exposure limits for the general population/ uncontrolled exposure, the antenna(s) used for these transmitters must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
Portable Comfort Control
This portable transmitter with its antenna complies with FCC and Industry Canada RF exposure limits for the general population/uncontrolled exposure. This device must not be co-located or operate in conjunction with any other antenna or transmitter.
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