Inground SpasLTR20111002, Rev. AOperating Your Spawww.calspas.com26Your new Cal Spa comes equipped with an electric heater. Following the directions listed below will ensurethe most efficient operation:NOTE: This method is only for spa usage under two hours a week.Keep the spa’s operating temperature 5˚ F below the desired usage temperature when not in use. One•or two hours before use, set the temperature to the desired temperature.If the spa usage exceeds two hours a week, the set temperature should remain at the desired usage•temperature.The air venturis should be used sparingly. When open, water temperature drops quite rapidly and can•also dissipate chemicals.Allowing the water temperature to lower more than 10˚F below the desired usage temperature and reheatingit prior to usage will cause the heater to operate longer than it normally would maintaining the desired tem-perature. Doing this will increase your operating cost and makes your heater work more than necessary.Periodic Reminder MessagesPress the “Mode” button to reset a displayed reminder.Message Frequency Action RequiredrPH Every 7 days Test and adjust chemical levels per manufacturer’s instructions.rSA Every 7 days Test and adjust chemical levels per manufacturer’s instructions.rCL Every 30 days Remove, clean, and reinstall filter per manufacturer’s instructions.rtg Every 30 days Test and reset GFCI per manufacturer’s instructions. Drain and refillspa per manufacturer’s instructions.rdr Every 90 days Drain and refill spa per manufacturer’s instructions.rCO Every 180 days Clean and condition spa coverrCH Every 365 days Install New Bio-Clean™ Filter