Ultrastat thermostat

The TB provides temperature control for gas, oil, electric, ultrastat thermostat, and heat pumps for up to 2 heat, and 2 cool systems.

Share your interactive ePaper on all platforms and on your website with our embed function. Electrical Ratings: See Table 2. Default Settings: See Table 3. Cooling: Selectable 1 - 6 cycles per hour. Interstage Differential:Droopless control.

Ultrastat thermostat

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See the Select Thermostat Location section.

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Table Of Contents. Table of Contents. Quick Links. TBU Commercial. Previous Page.

Ultrastat thermostat

Table of Contents. Quick Links. TB Ultrastat. The TB provides temperature control for gas, oil, electric.

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The thermostat has an adjustable Minimum-Off Timer that can be set from zero to five minutes Factory Setting—five minutes. Change language. Cool On is not in the display. If voltage is not present, check the heating equipment to find the cause of the problem. Removing thermostat from subbase. Check for 24 Vac between C and Rc. Terms of service. Verify operation of equipment in System Test mode. Unlocked: All functions accessible. Place thermostat back on subbase by aligning terminalscrew blocks with the pins on the back of the thermostat. To verify sensor resistance, remove one wire from one of the CU wiring terminals. S1Optional outdoor or indoor remote sensor.

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Set the system setting to Heat and set thetemperature setting above the room temperature. Shown only if system has fan and schedule programmable. Compressor output. Press DONE. Heat Pump Temperature Lockouts Dual Fuel Heat Pump and Outdoor Temperature Sensor In this operation, there is no external fossil fuel kit dual fuel kit installed; the thermostat controls this function:. Only shown for heat pump systems with more heat stages than cool selected and remote sensor selection is outdoor for control. Wire CU Outdoor Sensor to the thermostat. Table 4. See Table 6. Affects control operation in all control regimes not just recovery or setpoint change. Check for 24 Vac at the equipment on the secondary side of the transformer between power and common.