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  1. R

    2 pipe & 4 pipe sensors

    It's Honeywell Thermostat model TB8575A1000 used in Condo building. This thermostat was working fine for the last 5 years. Presently, I don't see Cool option. Honeywell Tech support says it could be defective Pipe sensor. I am not sure if that's correct. However I would like to know What should...
  2. R

    2 pipe & 4 pipe sensors

    Hello The questions are regarding the Sensors used with the Thermostat in a Condominium building. What are 2 pipe & 4 pipe sensors? What should be the typical resistances of each one?
  3. R

    3 wire Delta calculations

    Thanks for pointing out. The question is on 3-phase power. Third line is shown but should have been denoted with a letter.
  4. R

    3 wire Delta calculations

    I have a question on 3 wire Delta connected winding with Phase Supply between X, Y & Z is 370 Volts. What is the voltage between One Phase 'X' and the center tap of the opposite winding? See attached doc.

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