Gas Heat ESCO Practice Exam

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How can a technician determine if a thermostat anticipator is set correctly?

  1. by checking voltage across the gas valve

  2. by measuring terminal resistance

  3. by measuring current between R and W terminals

  4. by setting it to a default value

The correct answer is: by measuring current between R and W terminals

A Checking voltage across the gas valve is not the correct method to determine if the thermostat anticipator is set correctly. This method only confirms that there is voltage being supplied to the gas valve, but it does not provide any information about the thermostat itself. B: Measuring terminal resistance is also not the correct method. This method may provide information about the resistance in the thermostat, but it does not indicate if the anticipator is set correctly. D: Setting the anticipator to a default value is not the correct method because different thermostats may require different anticipator settings, and using a default value may not be accurate. The best method for a technician to determine if a thermostat anticipator is set correctly is by measuring the current between the R and W terminals. This will provide information about the amount of current being used by the thermostat, which can then be compared to the recommended setting for that specific thermostat. If the current is within the recommended range, then the anticipator is set correctly. This method is more accurate and specific to the thermostat being checked.

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