Appliance details
2.11 Electrical connections
Warning: Confirm that the water heater is appropriately grounded and that the installation meets all electrical codes. Outdoor electrical outlets have special requirements.
Warning: For safety reasons, disconnect the power supply to the heater before any service or testing is performed.
Warning: This heater must be electrically grounded in accordance with the most recent edition of the National Electrical Code. NFPA 70. In Canada, all electrical wiring to the heater should be in accordance with local codes and the Canadian Electrical Code, CSA C22.1 Part 1. Do not rely on the gas or water piping to ground the metal parts of the heater.
The 250 SXO requires an electrical power supply from a 120VAC 60Hz circuit and must be properly grounded.
A means for switching off the 120VAC power supply must be provided.
The heater is wired as shown in the wiring diagram (chapter 6, Fig. 29).
Warning: The heater is equipped with freeze prevention equipment that will operate and prevent freezing of the water in the heater to 5°F with no wind chill. Electrical power must be maintained to the heater to allow this to
function. WARNING: Proper insulation of the water lines below the heater is required if below freezing temperatures, below 32°F, are ever anticipated.
2.12 Operating instructions
B Remove the control cover shield to access the controls of the water heater.
Appliance electrical 
power supply
Fig. 17
Fig. 18
Warning: The control cover must be replaced after the initial operation begins, and must be in place at all times.
BBefore proceeding with the operation of the heater make sure that the system is filled with water.
BTurn off power supply to heater.
BOpen the cold water inlet supply to the heater fully.
BOpen a hot water faucet to permit the water to fill the heater and the piping and to eliminate the air trapped in the system.
BClose the hot water faucet after the water flows freely and all the air has escaped from the system. Turn on power supply to heater. The water heater is now ready to operate.
NOTE: A default temperature setting of
i122 F will appear on the display screen.
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