Yes, that is what 240V power is, a 2 pole circuit.
2. This unit does not have the auto start/stop on it. The manual states- During operation do not leave the machine running for more than 2 minutes
without the trigger gun being pulled. Although your machine has a by-pass valve on it and may have a thermal relief system, this can cause extensive pump damage. If machine will not be discharging water for more than 2 minutes, shut the machine off.
3. Handles incoming water up to 160� F
4. We do not sell refurbished units here.
5. See Chemical Injection Use and Calibration section about halfway through OWNERS MANUAL