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TR21, TR22, TR23, and TR24 Wall
Modules
INSTALLATION INSTRUCTIONS
FEATURES
The TR21, TR22, TR23, and TR24 family of wall modules include:
• Models with setpoint adjustment.
• Models with humidity output.
• Models with occupied/unoccupied override (bypass) with LED.
• Models with 3-position (auto/0/1) or 5-position (auto/0/1/2/3 speed) fan switch.
• LONWORKS® bus jack on all models except the TR21 and TR21-A models.
• Locking cover on all models.
• Operating range 45° to 99° F (7° to 37° C).
• Models (TR22 and TR23) with user-selectable temperature setpoint dials in Fahrenheit, Celsius, and Relative (- to +).
PRODUCT DESCRIPTION
The TR21, TR22, TR23, and TR24 are a family of direct-wired wall modules for use with:
—Spyder Unitary Controllers: PUL, PVL
—Excel 10 W7750, W7751a, W7752, and W7753 controllers
—Honeywell Excel 800, 600, 500, 100, and 80 (all fully programmable) controllers
—W7761 Controller
—ComfortPoint LON Controllers: CP-UL, CP-VL
All models have a space temperature sensor. Some models have a temperature dial, setpoint adjustment, LONWORKS bus jack, override (bypass) with LED, and fan switch.
NOTE: Refer to the TR21, TR22, TR23, and TR24 Wall Modules – Specification Data, form 63-1321, for specific model features and additional information.
aThe TR21, TR22, TR23, and TR24 wall modules are not compatible with W7751A,C,E,G Controllers.
SPECIFICATIONS
Models: For specific model information, see TR21, TR22, TR23, and TR24 Wall Modules – Specification Data, form 63-1321.
Environmental Ratings:
•Operating Temperature: 45° to 99° F (7° to 37° C).
•Shipping Temperature: -40° to 150° F (-40° to 65.5° C).
Accessories: 50007298-001 (pack of 12) medium, cover plate; 6-7/8 x 5 in. (175 x 127 mm).
Approvals: CE; UL94 plastic enclosure; FCC Part 15, Class B
Temperature Sensor
TR21, TR22, TR23, and TR24 20K Ohm Nonlinearized Sensor:
All models are furnished with a 20K Ohm nonlinear NTC temperature sensor that follows a specific temperature resistance curve. See Fig. 1 on page 2.
NOTE: The TR21-A wall module model has two (2) 20K Ohm nonlinear NTC temperature sensors in parallel, which provide 10K NTC temperature sensing necessary for averaging.
62-0267-09
TR21, TR22, TR23, AND TR24 WALL MODULES
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80K |
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(OHMS) |
70K |
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60K |
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RESISTANCE |
50K |
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40K |
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30K |
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20K OHM AT |
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20K |
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77oF (25oC) |
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10K |
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30 |
40 50 |
60 70 80 |
90 |
100 110 oF |
0 |
10 |
20 |
30 |
40 oC |
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TEMPERATURE (DEGREES) |
M5874A |
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Fig. 1. Temperature vs. Resistance for Nonlinear Sensor.
Communications
All wall modules (except the TR21 and TR21-A models) have a LONMARK® bus communications port. If needed, the jack plug must be removed in the field, and terminals 3 and 4 wired according to the installation instructions.
The recommended wire size for the LONMARK® bus is Level IV, 22 AWG (0.34 sq.mm) plenum or non-plenum rated, non-shielded, twisted pair, solid conductor wire.
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TEMPERATURE DIAL, |
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70 |
FAHRENHEIT DIAL SHOWN |
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(TR22 AND TR23 MODELS ONLY) |
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60 |
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80 |
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LED (TR23 AND TR24 MODELS ONLY) |
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BYPASS (OVERRIDE) BUTTON |
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(TR23 AND TR24 MODELS ONLY) |
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FAN SWITCH, 3 OR 5 POSITION |
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DEPENDING ON MODEL |
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(TR22, TR23, AND TR24 MODELS ONLY) |
LOCKING TAB SLOT (X2) |
LON CONNECTOR, |
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SHOWN WITH PROTECTIVE CAP IN PLACE |
M28125 |
(NOT AVAILABLE ON TR21 AND TR21-A MODELS) |
Fig. 2. Wall Module Features (TR23-F Shown).
BEFORE INSTALLATION
CAUTION
Erratic System Operation Hazard.
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.
Shielded cable is required in installations where these guidelines cannot be met.
Ground shield only to grounded controller case.
IMPORTANT
All wiring must comply with local electrical codes and ordinances or as specified on installation wiring diagrams.
—Wall module wiring can be sized from 16 to 22 AWG (1.31 to 0.33 sq. mm) depending on the application.
—The maximum length of wire from a device to a wall module is 1000 ft. (305 m).
—Twisted pair wire is recommended for wire runs longer than 100 ft. (30.5 m).
INSTALLATION
Mount the wall module on 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 wall module on an outside wall, on a wall containing water pipes, or near air ducts. Avoid locations that are exposed to discharge air from registers or radiation from lights, appliances, or the sun. See “Cover Disassembly” on page 3.
The wall module can be mounted on a wall, on a standard utility conduit box using No. 6 (3.5 mm) screws or on a 60 mm wall outlet box (see Fig. 3). When mounting directly on a wall, use the type of screws appropriate for the wall material.
STANDARD UTILITY CONDUIT BOX
SUBBASE 
NO. 6 SCREW
FRONT COVER
60 mm WALL |
OUTLET BOX |
SUBBASE |
3.5 mm SCREW |
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FRONT COVER |
M28126 |
Fig. 3. Mounting on Standard Utility Conduit Box or 60 mm Wall Outlet Box (TR23 Shown).
62-0267—09 |
2 |
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3 (76) |
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1 1/2 (38) |
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9/16 (14) |
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1 3/16 (31) |
STANDARD |
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UTILITY |
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7/8 (22) |
CONDUIT |
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BOX (2 X 4) |
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MOUNTING |
4 13/16 (122) |
70 |
HOLES |
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60 |
2 3/8 (60) |
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80 |
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2 1/4 (57) |
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3/16 (5) |
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70 |
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75 |
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TEMPERATURE LIMIT |
INSIDE OF |
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65 |
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SCREW POSITION (X12) |
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20 |
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FRONT |
60 |
25 |
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80 |
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COVER |
15 |
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NOTE: IF DESIRED, INSERT THE |
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– °C |
+ |
85 |
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TWO SETPOINT SCREWS INTO |
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55 |
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THE DESIRED POSITIONS. |
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°F |
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M25482 |
Fig. 4. Wall Module Subbase Dimensions in Inches (mm) and Temperature Limit Set Screw Locations (TR23 Shown).
Cover Disassembly
A snap-fit locking mechanism is used to attach the cover of the wall module to its subbase. To disassemble the cover from the subbase:
1.Insert a thin, flat blade screwdriver into each of the two slots at the bottom of the module to release the two locking tabs. See Fig. 2 on page 2.
2.Tilt the cover out and away from the subbase to release the top two locking tabs.
3.To change the dial (e.g. from Fahrenheit to Celsius) release the two tabs on the inside of the front cover and remove the old dial.
Wiring
Attach the wires from the device sensor terminals to the appropriate wall module terminals. See Table 1 on page 4.
CAUTION
Improper Electrical Contact Hazard.
Screw type terminal blocks are designed to accept no more than one 16 AWG (1.31 sq. mm) conductor.
Connect multiple wires that are 16-18 AWG (1.31-0.82 sq. mm) with a wire nut. Include a pigtail with this wire group and attach the pigtail to the individual terminal block.
Wiring Wall Modules
Wire the terminal block as follows:
1.For single wires, strip 3/16 in. (5 mm); for multiple wires going into one terminal, strip 1/2 in. (13 mm) insulation from the conductor.
2.If two or more wires (20 to 22 AWG only) are being inserted into one terminal, twist the wires together
before inserting. See Fig. 5.
TR21, TR22, TR23, AND TR24 WALL MODULES
3.Insert the wire in the required terminal location and tighten the screw to complete the termination.
4.Review and verify the terminal connection wiring and DIP switch settings illustrated in Table 1 on page 4.
NOTE: Wire the Lon connection (terminals 3 and 4) using Level IV 22 AWG (0.34 mm2) plenum or non-plenum rated, unshielded, twisted pair, solid conductor wire.
Wiring Examples
Table 1 on page 4 illustrates DIP switch settings and terminal connections for the wall modules. Refer to the TR21, TR22, TR23, and TR24 Wall Modules – Specification Data, form 63-1321, for additional DIP Switch information.
IMPORTANT
SW 2 on DIP Switch S2 is used for factory calibration of the temperature setpoint potentiometer. Depending on calibration, this switch may be set in either the On or Off position.
DO NOT change the position of this switch.
NOTES:
1.The TR21 and TR22 models do not use DIP Switch S1 and S3.
2.DIP Switch S1 is used only on the humidity models, TR21-H and TR23-H.
3.Models TR21 and TR21-A use terminals 1 and 2 only. Model TR21-J uses terminals 1, 2, 3, and 4 only.
1/2
1.STRIP 1/2 IN.
(13)
(13 MM) FROM WIRES TO BE ATTACHED AT ONE TERMINAL.
2.TWIST WIRES
TOGETHER
WITH PLIERS
(A MINIMUM OF THREE TURNS).
CONTROLLER OR
WALL MODULE
E-BUS CONNECTOR
TERMINALS 
3.CUT TWISTED END OF WIRES TO 3/16 IN. (5 MM) BEFORE INSERTING INTO TERMINAL AND TIGHTENING SCREW. THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION.
M11413
Fig. 5. Attaching Two Wires (20 to 22 AWG) to Wall Module Terminals.
Attaching the Cover
When all wiring is complete, attach the cover of the Wall Module as follows:
1.Optional: For models with a temperature dial, insert the two setpoint screws into the inside of the cover to set the desired temperature range limit. See Fig. 4.
2.Press the cover straight down onto the subbase until it snaps into place.
3.For models with a temperature dial, insert the desired dial through the opening in the cover. Align the keyed shaft on the knob with the keyed slot into the fitting on the subbase, then press down until it snaps into place.
3 |
62-0267—09 |
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