"PRO" Model - Basic Operating Instructions: 1. Open the Ultrazone-DUAL Unit by unscrewing both end caps 2. Gently slide the bulb into the Quartz Sleeve 3. Hand tighten the fittings / grommets that seal both ends of the Quartz Sleeve 4. Connect the 4-Pin bulb plug from Inside the End-Cap to the Bulb 5. Install both end caps back onto the Unit 6. Connect the airline from venturi to the air nipple, (opposite the electrical connection) 7. Install appropriate water fittings into threaded female sockets on Unit 8. Install hosing from water pump to the Unit, and from Unit, for the return water 9. Install clamps on all hosing 10. Mount Unit in desired location 11. Plug the unit's transformer into a GFCI grounded outlet. 12. Plug the control valve into ORP Controller or timer. (or GFCI outlet for continuous ozone production) 13. Turn on water pump with desired flow rate determined from above chart 14. Check for any leaks. Tighten clamps if necessary 15. If Bulb replacement is needed, follow same general procedure in steps 1-5 For Quartz sleeve cleaning or replacement: Follow the same general procedure as in steps 1-4, then Unscrew plastic retaining rings around both ends of the quartz sleeve. Remove rubber Grommets. Slide the Quartz sleeve out of unit. Clean or replace sleeve and reinstall in reverse order. "Standard" Model - Basic Operating Instructions: Both UV & Ozone production turn on & off simultaneously, 1. Open the Ultrazone-DUAL Unit by unscrewing both end caps 2. Gently slide the bulb into the Quartz Sleeve 3. Hand tighten the fittings/grommets that seal both ends of the Quartz Sleeve 4. Connect the 4-Pin bulb plug from Inside the End-Cap to the Bulb 5. Install both end caps back onto the Unit 6. Connect the airline from venturi to the air nipple,(opposite the electrical connection) 7. Install appropriate water fittings into threaded female sockets on Unit 8. Install tubing from water pump to the Unit, and from Unit, for the return water 9. Install clamps on all hosing 10. Mount Unit in the desired location 11. Plug Unit in ORP Controller, Timer or GFCI grounded outlet 12. Turn on water pump with desired flow rate determined from above chart 13. Check for any leaks. Tighten clamps if necessary 14. If Bulb replacement is needed, follow the same general procedure in steps 1-5