Equator WR 1956 User manual

Hello! I'm a chat assistant and I have read the manual for the Equator Beverage Center WR 1956. This document includes important safety instructions and guidance on how to install, operate, and maintain your new beverage center, including details about its key features such as the dual temperature zones, charcoal filtration and key lock function. I'm ready to answer your questions about this appliance.
What should I do before first use?

What is the temperature range of this appliance?

How often should I replace the charcoal filter?

Can I use an extension cord?