Is power applied to the temperature well heater when the Model 3604 Thermo Unit's power control switch is in the fan position?

Is power applied to the temperature well heater when the Model 3604 Thermo Unit's power control switch is in the fan position?

• A. Yes
• B. No
• C. Sometimes
• D. Only during heating

Answer: (B)

The accurate understanding of how the Model 3604 Thermo Unit operates clarifies that when the power control switch is set to the fan position, power is not applied to the temperature well heater. In this setting, the unit is designed to operate the fan only, which circulates air without engaging the heating element or heater. The purpose of having a fan-only mode is to allow for air circulation without raising the temperature, which can be useful for cooling purposes or maintaining temperature without heating. This operational design ensures that when the power control switch is in fan mode, the heating element remains inactive, preventing any unintended temperature rise in the system. Thus, the heater will not be energized, providing an effective means of controlling the thermal environment as dictated by the operator’s settings.

The accurate understanding of how the Model 3604 Thermo Unit operates clarifies that when the power control switch is set to the fan position, power is not applied to the temperature well heater. In this setting, the unit is designed to operate the fan only, which circulates air without engaging the heating element or heater. The purpose of having a fan-only mode is to allow for air circulation without raising the temperature, which can be useful for cooling purposes or maintaining temperature without heating.

This operational design ensures that when the power control switch is in fan mode, the heating element remains inactive, preventing any unintended temperature rise in the system. Thus, the heater will not be energized, providing an effective means of controlling the thermal environment as dictated by the operator’s settings.