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Фрагмент инструкции
On the bottom of the control is where electrical connections to the other component parts are attached along with the gas supply (manifold tube) to the main burner. The gas control/valve thermostat of this water heater is suitable for use on Natural gas only. Manifold Tube Control Display, Anode Rod Connector Pressure Switch / Fan, FV Sensor Connector Power Supply Transformer Connector Igniter/Flame Sense Connector Gas Control Valve/ Thermostat Temperature Probe /High Limit Probe Gas Supply- Inlet Bottom View 8 Pin Systems Connector 5 Pin Communications Connector 3 Pin Ignitor Connector 2 Pin Power Connector 1 2 3 4 1 2 3 4 On/Off Switch located on the right side. Figure 12. Electronic Control Display (Upper Control) 12 KNOW THE WATER HEATER’S COMPONENT PARTS Burner/Manifold Door Assembly The burner/manifold door assembly consists of several components such as: main burner, burner orifice, manifold tube and flame sense / hot surface igniter. See figure below for the complete list of components (Figure 13). *DO NOT operate the water heater without the burner orifices installed. Burner Screws Manifold Main Burner Tube Door Gasket Burner Orifice* Manifold Door View Port Flame Sense/ Hot Surface Igniter Assembly Flame Sense / Hot Surface Igniter Assembly Scoop side to be placed on the same side as View Port. Figure 13. Air Intake Chamber Fan The small fan at the top of the air intake chamber on the side of the water heater is used to draw in necessary combustion air for the efficient operation of the main burner. The fan pressurizes the sealed combustion chamber which in turn allows the flue baffle inside the center flue tube to slow down the hot exhaust gases so heat can be extracted into the water before exiting into the vent system. The air intake chamber fan runs for about 5 seconds to prepurge the combustion chamber before the beginning of an ignition sequence when there is a call for heat. The fan will continue to operate while the main burner is in operation and for about 5 seconds after the temperature set point has been achieved. The air intake chamber screen covering the fan should be inspected and cleaned periodically to assure it is not limiting air flow into the chamber (Figure 14). Pressure Switch A pressure switch in the control string of this water heater is used to verify there is an adequate flow of combustion air into the combustion chamber before and during main burner operation. It is electrically connected to the gas control valve/thermostat and controls the opening and closing of the gas valve. If there is an insufficient air supply being delivered to the combustion chamber the pressure switch will not allow the water heater to operate (Figure 15). Air intake Chamber Air intake Chamber Screen Air intake Chamber Fan Figure 14. Pressure Switch Figure 15 13 KNOW THE WATER HEATER’S COMPONENT PARTS Flammable Vapor Cut Off Switch (FV Sensor) The water heater is equipped with a FV sensor, for detecting the presence of flammable vapors (e.g. spilled gasoline). When the sensor detects those vapors, the heater will shut down and not operate. If flammable vapors are detected or the sensor is inoperative, an icon will flash on the electronic control display and the heater will go into a lockout mode. The water heater will not function again until the flammable vapors have been eliminated and the control is manually reset using a special Flammable Vapor sensor reset sequence. (Figure 16). Power Anode Rod To protect the glass-lined water tank from corrosion through electrolysis, this water heater is equipped with a non sacrificial powered anode rod. Unlike conventional magnesium or aluminum anode rods used in water heaters, the powered anode does not deteriorate and is less likely to contribute to the occurrence of “Smelly (Rotten Egg) Water” (Figure 17). FV Sensor Figure 16. Powered Anode Rod Figure 17. HOW THE WATER HEATER’S COMPONENT PARTS ARE CONNECTED Pressure Switch Control Display Power Supply Transformer Igniter/Flame Sense Connector Air Intake Chamber Fan Anode Rod Gas Control Valve / Thermostat CAUTION: LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING. FV Sensor CAUTION: DO NOT USE AN EXTENSION CORD TO CONNECT THE TRANSFORMER TO AN ELECTRICAL OUTLET. Figure 18. WATER HEATER OPERATION The figure below shows the water heater’s sequence of operation when a call for heat is initiated. The gascontrol valve/thermostat will attempt to light the burner three times. If the flame sense rod in the burner/ manifold assembly does not detect ignition, the control will enter lockout mode indicated by the electroniccontrol display’s flashing of the appropriate status code. SEQUENCE OF OPERATION Main burner flame is detected byflame sense rod. Air intake fan and main burner will continue to operate until water temperatureinside the tank reaches temperature set point. Gas valve/thermostat will do ar...
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