Assessments - 4, GPA: 4.3 ( )

Fabricante : A.O. Smith Arquivo Tamanho: 335.32 kb Arquivo Nome : Língua de Ensino:

The system controller, other than the factory-supplied tank probe (e. g. Honeywell Aquastat) must be wired on the low voltage side of the 24VAC rear junction box. Refer to the Schematic Diagram (Figure 19) and the Connection Diagram (Figure 20) for wire connections. Fuse Protection The 24 VAC circuitry is protected with a 3 amp auto fuse on the ignition control boards and a 5 amp fuse on the Central Control Board. If the fuse opens, a red LED located near the fuse will light (see figures 14 and 15). If the red LED is illuminated, replace the fuse. Repeated failure of the fuse is an indication of possible damage to the ignition control. The 120V circuits of each ignition control module is protected with a 10 amp fuse located inside the control box. Note: Four extra 3 amp fuses and one 5 amp fuse are supplied with the boiler. Recommended Replacement fuses: 3 Amp: Littlefuse automotive fuse PN 257003 5 Amp: Bussman Automotive fuse PN ATC5 IMPORTANT Only qualified personnel shall perform the initial firing of the heater. At this time the user should not hesitate to ask the start-up technician any questions regarding the operation and maintenance of the unit. If you still have questions, please contact the factory or your local A.O. Smith representative. Lighting and Operating instructions are included with this manual. By using these instructions, the user may be able to make minor operational adjustments and save unnecessary service calls. However the user should not attempt repairs, but should contact a service technician or gas supplier. GENERAL Never operate the boiler without first making sure the boiler and system are filled with water, in addition: For hot water supply installations: • Make sure a temperature and pressure relief valve is installed at the boiler and, if used, the storage tank. Also check for leaks. For heating boiler installations: • Make sure that the boiler and system have been purged of air and checked for leaks. Also be sure to check the gas piping for leaks before beginning the initial firing of the boiler. FILLING AND PURGING FOR HEATING BOILER INSTALLATION 1. Fast fill system through bypass until pressure approaches desired system pressure. Close bypass valve and permit pressure to be established by the pressure reducing valve. 2. Vent all high points in system to purge system of air. Provisions should be made to permit manual venting of radiators or convectors. FILLING FOR HOT WATER SUPPLY BOILER INSTALLATION 1. Close the systems drain valve by turning handle clockwise. 2. Open a nearby hot water faucet to permit the air in the system to escape. 3. Fully open the cold water inlet pipe valve allowing the heater and piping to be filled. 4. Close the hot water faucet as water starts to flow. 5. The heater is ready to be operated. 22 PURGING OF GAS LINE Gas line purging is required with new piping or systems in which air has entered. CAUTION PURGING SHOULD BE PERFORMED BY PERSONS EXPERIENCED IN THIS TYPE OF GAS SERVICE TO AVOID RISK OF FIRE OR EXPLOSION. PURGE DISCHARGE MUST NOT ENTER CONFINED AREAS OR SPACES WHERE IGNITION CAN OCCUR. THE AREA MUST BE WELL VENTILATED AND ALL SOURCES OF IGNITION MUST BE DEACTIVATED OR REMOVED. BEFORE PLACING THE BOILER IN OPERATION, CHECK FOR GAS LEAKAGE. USE A SOAPAND WATER SOLUTION OR OTHER MATERIALACCEPTABLE FOR THE PURPOSE OF LOCATING GAS LEAKS. DO NOT USE MATCHES, CANDLES, FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE. WARNING THE GAS VALVE MUST HAVE BEEN IN THE OFF POSITION FOR AT LEAST 5 MINUTES. This waiting period is an important safety step. Its purpose is to permit gas that may have accumulated in the combustion chamber to clear. IF YOU DETECT GAS ODOR AT THE END OF THIS PERIOD DO NOT PROCEED WITH LIGHTING. RECOGNIZE THAT GAS EVEN IF IT SEEMS WEAK, MAY INDICATE PRESENCE OF ACCUMULATED GAS SOMEPLACE IN THE AREA WITH RISK OF FIRE OR EXPLOSION. SEE THE FRONT PAGE FOR STEPS TO BE TAKEN. INLET GAS PRESSURE The inlet gas pressure is measured by removing the low gas pressure switch located on the main gas manifold which is upstream of the unit's combination gas valves. The maximum value specified in the table must not be exceeded. The minimum values shown in table 17 must be maintained under both load and no load conditions (static and dynamic). The combination gas valves supplied with the boiler are for low pressure service. If upstream pressure exceeds 14.0" W.C., an intermediate gas pressure regulator of the lockup type must be installed. TABLE 17. Inlet Gas Pressure Nat. Gas Prop. Gas Max. Inlet Pressure (Inches W.C.) 14.0 14.0 Min. Inlet Pressure (Inches W.C.) 6.0 11.0 MANIFOLD PRESSURE The manifold gas pressure is measured at the pressure tap on the downstream side of the combination gas valve(s). For natural gas the Manifold Pressure should measure 3.5" W.C. For propane (LP) gas, the pressure should read 10" W.C. IMPORTANT UNDER NO CIRCUMSTANCES SHALL THE GAS PRESSURE MEASURED AT THE BURNER MANIFOLD EXCEED THAT STATED ON THE BOILER RAT...

Baixe o seu

Para fazer o download, introduza 2 dígitos :