Оценок - 3, средний балл: 5
(
)
)
|
Фрагмент инструкции
HIGH ALTITUDE INSTALLATIONS WARNING INSTALLATIONS ABOVE 2000 FEET REQUIRE REPLACEMENT OF THE BURNER ORIFICE IN ACCORDANCE WITH SECTION 8.1.2 OF THE NATIONAL FUEL GAS CODE (ANSI Z223.1). FOR CANADIAN INSTALLATIONS CONSULT CANADIAN INSTALLATION CODES AND CAN/CGA B149. FAILURE TO REPLACE THE ORIFICES WILL RESULT IN IMPROPER AND INEFFICIENT OPERATION OF THE APPLIANCE 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 gas. Therefore, the heater input rate should be reduced at high altitudes for satisfactory operation with the reduced oxygen supply. Failure to make this reduction could 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 (610m), 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 (5.6Kwh)=100,000 Btuh (29.4 Kwh). At 6000 feet (1829m) the correct input rating should be 91,200 Btuh (26.7 Kwh). 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 orifice. 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 A.O. Smith Water Products Company. 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 the application. 4 FEATURES TABLE 4. Control Device Factory Setting Field Adjustment Heater Automatic Gas Shutoff Control 1950F (90.5°C) cut out temp. Fixed 1900F (87.7°C) cut in temp. Non-adjustable Heater Protector Switch 2500F (121°C) cut out temp. Fixed 2000F (93.3°C) cut in temp. Non-adjustable Tank Temperature Control Safety Flow Switch Field Supplied and Installed See Table 1 Adjust to Requirements Field Adjustable AUTOMATIC GAS SHUTOFF CONTROL The automatic gas shutoff control, fig. 1, is an automatic safety device which activates at a water temperature of approximately 1950F (90.5°C). This limits the water outlet temperature to a maximum of 2000F (87.7°C). The device is wired in series with the gas valve. The control will automatically reset when the water temperature cools to approximately 190oF (87.7°C). Should the automatic gas shutoff control activate during a heating cycle, the heater’s gas valve will close; extinguishing the main burners. The pilot burner will also be extinguished. The circulating pump will continue operating as long as the storage tank thermostat continues to “call for heat”. When the water temperature in the heater drops to 1800F (82.2°C) or below the control module will begin an ignition cycle which will relight the pilot burner and main burners. Re-ignition of the main burners will occur if the storage tank thermostat continues to call for heat. Otherwise, the normal operating cycle will resume on the thermostat’s next call for heat. AUTOMATIC GAS SHUTOFF CONTROL FIGURE 1 PROTECTOR SWITCH (Coil High Limit) This heater is equipped with a manually reset protector switch, Figure 2, located under the small cover on the side of the jacket. This device provides positive shutdown of the heater in the event of heater or system malfunction. Should the surface temperature of the copper tubing heat exchanger reach 2500F (121.1°C), the protector switch will activate. The gas valve will close, and ...
Эта инструкция также подходит к моделям:Вентиляторы - 225M (364.31 kb)
Вентиляторы - 160M (364.31 kb)
Вентиляторы - 225M (364.31 kb)
Вентиляторы - HW-120M (364.31 kb)