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Hersteller: Generac Dateigröße: 3.66 mb Dateiname: 44448cca-0726-4e84-ad08-878b5c7475d2.pdf Unterrichtssprache:

If propane (LP requirements) gas is preferred, contact an authorized service dealer. Refer to Secion 1.12. Recommended fuels should have a Btu content of at least 1,000 Btus per cubic foot for natural gas; or at least 2,520 Btus per cubic foot for LP gas. Ask the fuel supplier for the Btu content of the fuel being used. Fuel pressure for a natural gas set up should be five inches to 14 inches of water column (0.18 to 0.5 psi) at all load ranges. Fuel pressure for an LP vapor set up should be 11 inches to 14 inches of water column (0.4 to 0.5 psi) at all load ranges. NOTE: A seperate gas line and regulator may be needed to assure proper gas pressure to the generator. Improper gas pressure can cause hard starting and affect engine durability. ! Gaseous fuels such as natural and LP (propane) gas are highly explosive. Even the slightest spark can ignite such fuels and cause an explosion. No leakage of fuel is permitted. Natural gas, which is lighter than air, tends to collect in high areas. LP gas is heavier than air and tends to settle in low areas. 1.7 ENGINE PROTECTIVE DEVICES The engine has several safety switches which cause the engine to automatically shut down under the following conditions: low oil pressure, high coolant temperature, engine overspeed, low coolant level or overcrank (Figure 1.3). Figure 1.3 - Engine Protective Devices .. 1.7.1 LOW OIL PRESSURE SWITCH This switch is normally-closed (N.C.) but is held open by engine oil pressure during engine running. Should operating oil pressure drop below about 10 psi (68 kPa), the switch contacts close and the engine shuts down automatically (Figure 1.4). Figure 1.4 - Low Oil Pressure Switch • 1.7.2 HIGH COOLANT TEMPERATURE SWITCH This normally open (N.O.), thermostatic switch has sensing tip which is immersed in captive coolant. Should coolant temperature exceed about 250°F (121°C), the switch contacts close, which causes the engine to shut down automatically (Figure 1.5). Generac® Power Systems, Inc. 5 6 Generac® Power Systems, Inc. Figure 1.5- High Coolant Temperature Switch 1.7.3 LOW COOLANT LEVEL SWITCH Should engine coolant level drop below the level of the high coolant temperature switch, it is possible for the engine to overheat without automatic shutdown. To prevent such overheating without automatic shut down, the engine has a low coolant level sensor. If the engine coolant drops too low, the engine automatically shuts down (Figure 1.6). Figure 1.6 - Low Coolant Level Sensor 1.7.4 OVERSPEED SHUTDOWN The Pre-pack circuit board on liquid cooled units receives AC frequency (rpm) signals directly from the stator AC power windings, via sensing leads S15 and S16. Should AC frequency exceed about 72 Hz, circuit board action will automatically shutdown the engine (Figure 1.7). Figure 1.7 - Control Module Assembly Circuit Board 1.7.5 PCB OPERATION LED’S • LED 1 is RED. The LED will be on when utility sensing is NOT available to the circuit board. This LED will function only when the AUTO/OFF/ MANUAL switch is set in the Auto position. • LED 2 is YELLOW. This LED will be on when the circuit board battery charger is on. This LED will cycle on and off with the battery charger, 4.85 hours on the 4.85 hours off. • LED 3 is GREEN. This LED will flash when the circuit board has load voltage available to it. This LED will function when voltage is available across T1 and T2. 1.7.6 OVERCRANK SHUTDOWN After 90 seconds of crank-rest cycles, this function ends cranking if the engine fails to start in that 90 second span. 1.7.6 DC FUSE This clearly labeled fuse is located on the front panel of the control system. It protects the panel wiring and components from damaging overload. Always remove this fuse before commencing work on the generator. The unit will not start or crank if the fuse is blown. Replace the fuse with one of the same size, type, and rating. Generac normally uses an AGC fuse rated at 15 amps (part number 022676). 1.8 UNPACKING 1.8.1 UNPACKING PRECAUTIONS Handle shipping cartons and crates with care. Use care to avoid damage from dropping, bumping, collision, etc. Store and unpack cartons with the proper side up, as noted on the shipping carton. 1.8.2 INSPECTION After unpacking, carefully inspect the generator for any damage that may have occurred during shipment. If loss or damage is noted at the time of delivery, have the person(s) making delivery note all damage on the freight bill or affix their signature under the consignor’s memo of loss or damage. 1.9 LIFTING THE GENERATOR When lifting or hoisting equipment is used, be careful not to touch overhead power lines. The generators weight of more than 900 pounds requires proper tools, equipment, and qualified personnel to be used in all phases of handling and unpacking. ! .. .. .. .. .. A E 17 1 2002 GENERAC POWER SYSTEMS, ASSY #076009A CUT R83 FOR 50HZ PRE-PACKAGED STANDBY U1 U12 U2 U13 U14 U3 U5 U8 U15 U10 U16 U17 U9 U4 U7 CR2 CR3 CR12 CR13 CR14 CR15 CR16 CR20 CR21 CR24 CR30 CR32 CR36 CR29 CR1 CR...

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