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T498A, B Electric Heat Thermostats
The T498A,B Electric Heat Thermostats provide line voltage control of electric heating equipment. A snap action switch makes heating circuit on temperature fall.
• CSA Performance Certifled at 16A.
• CSA Certified, Underwriters Laboratories Inc. Listed up to 5 kW at 277 Vac.
• Long life, industrial-grade Micro SwitchTM mechanism.
• Rugged, engineering plastic mounting base with captive mounting screws.
• Replaces any standard wall-mounted electric heat thermostat.
• Classic beige styling.
• Range: 40°F to 80°F (5°C to 25°C).
• Locking cover and range stops are optional.
• Energy efficient and economical.
IMPORTANT: The specifications given in this description do not include normal manufacturing tolerances. Therefore this unit may not exactly match the listed specifications . This product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if these conditions are changed.
T498A: Makes heating circuit on temperature fall. With setting knob on extreme counterclockwise position, provides single line break—spst.
T498B: Makes heating circuit on temperature fall. With setting knob at OFF position, provides double line break for fuse protected 240V heating circuits. Remakes circuit no higher than -31°F (-35°C) in OFF position. Both models available with a thermometer located in the cover to indicate the actual room temperature.
40°F to 80°F, markings every 5°F.
Type of Switching:
Fully enclosed snap acting Micro Switch.
T498A: Single line break (spst).
T498B: Spst with double line break (dpst in OFF position).
Wiring Connections: 6" (150 mm) stranded copper leadwires suitable for connecting to aluminum wiring if approved special service CO/ALR connectors are used. Color-coded Black to Ll (T498A,B); Red to L2 (T498B only).
Electrical Rating (Non-inductive (resistive) rating):
22A non-inductive at 120/208/240 Vac.
19A non-inductive at 277 Vac.
CSA Performance Certification: 16A at 208/240 Vac.
Setpoint Adjustment: Control knob on face of thermostat.
Sensing Element: Flat bimetallic blade.
Differential: Approximately 3°F (2°C) nonadjustable.
Thermometer: Optional coil bimetal 50°F to 90°F (10°C to 30°C).
Mounting Means: Direct mounting on NEMA standard vertical 2 x 4 inch (50 mm x 100 mm) switch box, or 4 x 4 inch (100 mm x 100 mm) box with mud ring adapter (not provided) using 6-32 slotted RobertsonTM screws.
Underwriters Laboratories Listed: File No. E47434, Guide No. XAPX.
CSA: File No. LR1322
Replaces Part Number: T498B1553