The full line of A. O. Smith Cyclone Mxi condensing water heaters have been designed to provide years of dependable service and feature industry leading technology. Models are available from 120,000 to 500,000 Btu/h and all deliver thermal efficiencies of 95% and higher. The unique helical coil heat exchanger limits weld joints for optimal service life while maximizing heat transfer.
Cyclone is the industry leader in high efficiency commercial water heating with over a quarter million Cyclones sold since 1997. The current Mxi modulating models adjust firing rate to the specific demand further increasing efficiency and money savings.Product Page »
This unit has several new features. Before installing, read the Installation Manual and follow all safety warnings and installation instructions.
Make sure the Intake and Exhaust vent pipes do not exceed the lengths listed in the Installation Manual. Plastic elbows are the equivalent of five feet of straight pipe. Make sure the debris screen has been removed from the Intake vent If the unit will be Direct Vented (outside air).
The unit's Data Plate lists the BTU input and minimum gas pressure requirements. Make sure the gas pipe size and length is correct for the BTU input listed on Data Plate Make sure the gas pressure regulator is adequate for the BTU input listed on Data Plate. Check gas supply pressure with a gas pressure gauge. See Installation Manual for details.
Make sure the Condensate Drain pipe slopes to an adequate drain. See Installation Manual for construction details.
Ensure that the electrical power supply has been installed according to the instructions in the Installation Manual. This unit must be properly grounded.
The switch in front of the LCD display is an "Enable/Disable" switch. It does not turn power off to the main circuit board. If the LCD display says "Water Heater Disabled," press the Enable switch on the front of the unit to allow water heater to operate.
The switch in front of the LCD display is an "Enable/Disable" switch. It does not turn power off to the main circuit board. If the LCD display says "Water Heater Disabled," press the Enable switch on the front of the unit to allow water heater to operate. Turn electrical power off at the source when necessary for service.
If the LCD display shows an error message, read and follow the Advanced troubleshooting screens on the LCD display. The Installation Manual also contains detailed troubleshooting information. If you need additional help, use the following resources: