INSTALLATION INSTRUCTIONS
62-0267-09
TR21, TR22, TR23, and TR24 Wall Modules

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.
•L
ONWORKS® 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.

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 5in. (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.
aThe TR21, TR22, TR23, and TR24 wall modules are not
compatible with W7751A,C,E,G Controllers.