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Stabilize the room temperature and measure it at the thermostats location. Set the dial to the temperature that was measured and adjust the thermostats branch line output to mid point of the controlled device`s operating range. For example if the range is 3-15 psi set the stat output for 9 psi when it is at setpoint. While doing this do not stand near the thermostat for extended periods, the heat from your body will be sensed by the stat and throw off the calibration. In other words work fast.

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16y ago

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