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Schneider Electric TA-155 Series, TB-155 Series Non-Digital, Electronic On/Off Thermostat/Controller

Non-Digital, Electronic On/Off Thermostat/Controller
TA-155 Series, TB-155 Series

The T155 series thermostat provides on/off control for low voltage and line voltage control of valves, relays and fan motors. Applications include two-pipe and four-pipe fan coil units, air handling units, and heating and cooling applications.

• Manual or automatic changeover models.
• Line voltage 3-speed fan control.
• Continuous or cycling fan operation (cycling fan operation requires additional relay or relays).
• Handles all supply voltages from 24 to 277 Vac at 50/60 Hz (fan and system voltage must be the same).



Select a link under the "item" tab below to order.

Cat #ChangeoverHeat/Cool OutputsDeadbandFan ControlSystem Switches
TB-155-10Automatic(b)Dual4F° (2.2C°)Hi-Med-LoOn-Off
TB-155-15Automatic(b)Dual4F° (2.2C°)NoneNone
Power input: 24 to 277 Vac @ 50/60 Hz, full wave device
Power consumption: 0.88 watts at maximum
Connections: Power: Up to 14 AWG wire
Control: Up to 14 AWG wire
Electrical: Thermostatic heat/cool output switch ratings: 10 VA @ 24 Vac, Pilot duty 20 VA @ 120 - 277 Vac. Full wave device
Control ranges: Operating differential: 1 F degree (0.6 C degree)
Changeover deadband (TB155 only): 4 F degrees (2.2 C degrees)
Setpoint adjustment range: 50 to 90°F (10 to 32°C)
Mechanical: Material: Rigid vinyl
Finish: Cool gray
Ambient temperature limits: Shipping and storage:-30 to 130°F (-34 to 55°C)
Operating: 32 to 130°F (0 to 55°C)
Humidity: Maximum 95% con-condensing
Locations: NEMA Type 1
Dimensions: 4-1/2 H x 2-3/4 W x 1 D inches (114 x 79 x 25 mm)
Agency Listing: CE compliant
UL File #E50023
CUL File #E50023
General Instructions: Refer to F-27022

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