Temperature Sensor - Honeywell TR21 Manual Del Usuario

TR21, TR22, TR23, AND TR24 WALL MODULES
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 Non-linearized
Sensor:
All models are furnished with a 20K Ohm non-linear NTC
temperature sensor that follows a specific temperature
resistance curve. See Fig. 1.
Honeywell controllers used with the TR21, TR22, TR23, and
TR24 models employ an algorithm that provides readings
close to the actual temperature. Sensor accuracy across the
range of 55°F to 85°F (13°C to 29°C) is better than ±0.36°F
(±0.2°C).
NOTE: The TR21-A wall module model has two 20K Ohm
non-linear NTC temperature sensors in parallel,
which provide 10K NTC temperature sensing
necessary for averaging.
Model Number
Honeywell Replaces
Wall Module Honeywell
Model Model
TR21 T7770A1006
TR21-A T7770A3002
TR21-H N/A
TR21-J T7770A2004
TR22 T7770B1004
T7770B1020
T7770B1046
TR23 T7770C1002
T7770C1028
T7770C1044
TR23-H N/A
b T7770C1051
TR23-N
T24 T7770D1000
TR22-F5 N/A
TR23-F3 T7770E1023
TR23-F5 T7770F1005
c N/A
TR23-KL
N/A
c
TR23-H-KL
a

A check mark ( ) indicates the feature is included with the wall module.
b
The TR23-N has no Honeywell logo on the cover.
c
Sold in packs of 20.
d
See Table 5 on page 6 for model numbers.
63-1321ES—06
Table 1. TR21-TR24 Wall Module Features.
Sensor Type
Sensor Element
Type Temp Humidity
20K ohms

non-linear
10K ohms
non-linear 
for averaging only




20K ohms

non-linear







80K
70K
60K
50K
40K
30K
20K
10K
30 40
0
Fig. 1. Temperature vs. resistance for nonlinear sensor.
Wall Module Features
Table 1 illustrates the TR21, TR22, TR23, and TR24 wall
module features and lists the existing Honeywell models that
they replace.
a
Selectable Setpoint
Adjustment:
55°F to 85°F,
13°C to 30°C, or
Relative (- to +)



 




Knob Not Included

Knob Not Included
2
20K OHM AT
77 o F (25 o C)
50 60 70 80 90 100
10 20 30
TEMPERATURE (DEGREES)
Override
Button LON
with LED Jack



 
 
 
 

 
 
d
 
d
 
110 o F
40 o C
M5874A
Fan
Switching
N/A
5 position
3 position
5 position
N/A