State Industries SBD71120NE warranty Features, SELF-CLEANING Hydro Cannon, High Limit Switch E.C.O

IMPROPERAND INEFFICIENT OPERATION OF THEAPPLIANCE RESULTING IN THE PRODUCTION OF INCREASED LEVELS OF CARBON MONOXIDE GAS IN EXCESS OF SAFE LIMITS WHICH COULD RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

You should contact your gas supplier for any specific changes which may be required in your area.

As elevation above sea level is increased, there is less oxygen per cubic foot of air. Therefore, the heater input rate should be reduced at high altitudes for satisfactory operation with the reduced oxygen supply. Failure to make this reduction would result in an overfiring of the heater causing sooting, poor combustion and/or unsatisfactory heater performance.

U.S. REQUIREMENTS

Ratings specified by manufacturers for most appliances apply for elevations up to 2000 feet (610m). For elevations above 2000 feet (610), ratings must be reduced at the rate of 4% for each 1000 feet (305m) above sea level. For example, if a heater is rated at 120,000 Btuh (35 kWh) at sea level, to rate the heater at 4000 feet (1219m), you subtract 4 (once for each thousand feet) x .04 (4% input reduction) x 120,000 (original rating) from the original rating. Therefore, to calculate the input rating at 4,000 feet (121.9m): 4 x .04 x 120,000 =19,200 Btuh (5.6 kWh), 120,000 (35 kWh) - 19,200 (5.6 kWh) = 100,800 Btuh (29.4 kWh). At 6000 feet (1829m) the correct input rating should be 91,200 Btuh (26.7 kWh).

on the pipe nipple portion of the hydro cannon, that must be aligned with the top of the inlet spud. A label above the jacket hole has an arrow that will point to the marked portion of the pipe nipple if the orientation is correct. If the arrow does not point within the marked range on the pipe nipple, adjust the pipe nipple to correct. A pipe union is supplied with the hydro cannon to reduce the probability of misaligning the hydro cannon accidentally while tightening the connection to the inlet water supply line. Improper orientation of the hydro-canon can cause poor performance of the heater and can significantly reduce outlet water temperatures during heavy draws.

NOTE: The inlet tube may have 1, 3 or 7 cross-tubes.

FIGURE2

For proper function, the hydro cannon must be oriented correctly. There is a marked range on the pipe nipple that must be aligned with the top of the inlet spud (check for label on the appliance) to assure proper orientation. Please check to confirm that the marked range is in alignment with the top of the spud. A pipe union is supplied with the hydro cannon to help eliminate the possibility of changing the orientation by accidentally over- tightening the inlet supply line. Improper orientation of the hydro cannon may cause temperature build-up issues or spells of colder than usual water temperatures.

CANADIAN REQUIREMENTS

Appliances with inputs up to and including 400,000 BTU (117.2 kW) must be factory equipped with orifices for operation at specific elevations. Standard (sea level) orifices permit operation up to 2000' (610m) elevation. For operation between 2000' (610m) and 4500' (1370m) specify "HIGH ALTITUDE OPERATION" when ordering the heater(s). For operation above 4500' (2370m) consult factory before ordering.

Field conversion for operation at altitudes other than that specified on the heater rating plate is not permitted.

The input reduction is primarily achieved by reducing the size of the main burner orifices. To do this, the main burner orifices require replacement with orifices sized for the particular installation elevation. Correct orifice sizing and parts may be obtained from State Water Heaters. When ordering, be sure to state the model number and the altitude of the location where the water heater is being installed.

Upon completion of derating of the heater, adjustment to the gas pressure regulator may be required. See CHECKING THE INPUT section in this manual for inlet and manifold pressure requirements.

Also due to the input rating reduction required at high altitudes, the output rating of the appliance is reduced and should be compensated for in the sizing of the equipment for application.

FEATURES

SELF-CLEANING HYDRO CANNON

These units include a self-cleaning hydro cannon installed in the front water inlet. See figure 2. The hydro cannon must be oriented correctly for proper function. There is a marked range

HIGH LIMIT SWITCH (E.C.O.)

The dual bulb controller (fig. 3) contains the high limit (energy cutoff) sensor. The high limit switch interrupts main burner gas flow should the water temperature reach 205°F (96°C).

In the event of high limit switch operation, the appliance cannot be restarted unless the water temperature is reduced by at least 20°F (11°C) and the high limit reset button on front of limit control (fig. 3) is depressed.

Continued manual resetting of high limit control, preceded by higher than usual water temperature is evidence of high limit switch operation. The following is a possible reason for high limit switch operation.

•A malfunction in the thermostatic controls would allow the gas valve to remain open causing water temperature to exceed the thermostat setting. The water temperature would continue to rise until high limit switch operation.

Contact your dealer or servicer if continued high limit switch operation occurs.

DUAL-BULB THERMOSTAT (COVER REMOVED)

FIGURE3

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