While many forums discuss repairs, the official provides a strict maintenance calendar:

Evenheat Model 5320 is a versatile ceramic and glass kiln, typically featuring a Kiln Sitter Model K for manual shut-off control

Don’t let a missing manual stop you. The Evenheat 5320 is a workhorse—simple, repairable, and easy to learn. Use the legacy resources above, treat it with respect, and you’ll be firing beautiful work in no time.

Set all switches to "Low" for the first 2 hours to drive out moisture.