Specifications - Honeywell T4398A Product Data

T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT

SPECIFICATIONS

Models:
T4398A: Makes heating circuit on temperature fall. With
setting knob at far left (counterclockwise) position, pro-
vides calibration-free frost protection setting of 40°F
(4°C). See Fig. 2.
T4398B: Makes heating circuit on temperature fall. With
setting knob at Off position, provides double line break
for fuse-protected 240V heating circuits. (See Fig. 3.)
Both models feature optional thermometer, located in the
cover, to indicate the actual room temperature.
Accessories (Not Included):
272804A Range Stop and Cover Locking Assembly:
Allows field-selection of minimum and maximum tem-
perature settings. Includes range stop assembly, cover
locking-screws and wrench.
Setting Range:
Fahrenheit Models: Indicates range of 50°F to 80°F with
marking indications in 5°F increments.
Celsius Models: Indicates range of 10°C to 25°C with
marking indications in 1°C increments.
Differential:
Approximately 2°F (1°C) mechanical and thermal, non-adjust-
able.
Switch Type:
Enclosed industrial-grade Micro Switch˜™ snap switch.
T4398A: Single-line break (single-pole, single-throw).
T4398B: Double-pole, single-throw with double-line break
(double-pole, single-throw) in Off position.
Wiring Connections:
Six-inch (150 mm) stranded copper leadwires suitable for con-
necting to aluminum wiring if approved special service CO/
ALR connectors are used.
Electrical Rating:
22A non-inductive at 120/208/240 Vac.
19A non-inductive at 277 Vac.
Canadian Standards Association Performance Rating:
20A at 120/208/240 Vac.
69-1604
Approval Ratings:
Underwriters Laboratories Inc: Listed; file no. E47434,
guide no. XAPX.
Canadian Standards Association: File no. LR1322.
Mounting:
Direct mounting on NEMA standard vertical 2 in. x 4 in. switch
box, or 4 in. x 4 in. box using 6-32 slot Robertson™
screws.
Sensing Element:
Vapor-filled, hermetically-sealed, stainless steel, dual dia-
phragm.
Thermometer (Optional):
Coil bimetal 50°F to 90°F (10°C to 30°C).
Barometric Sensitivity:
1°F/500 ft (0.3°C/kPa).
Dimensions:
See Fig. 1.
FRONT VIEW
80
•
70
•
60
•
50
•
˚F
2-7/8 (73)
Fig. 1. T4398A,B dimensions in in. (mm).
2
SIDE VIEW
3/4
1-3/4
(19)
(48)
4-3/8
(111)
1/2 (13)
1-1/2
(39)
1/2 (13)
2-1/8
(54)
3-1/4
(83)
M5795A