STARTING LOGIC – GAS COMPRESSION1. Prior to cranking the engine the control logic must provide a five-minute prelube before engine starting ortwo-minute prelube every hour. Normal prelube pressure at oil header is 25 PSIG. Minimum lube oil flowrate is 30 GPM.2. Activate the overspeed control prior to cranking to assure protection from overspeed.3. Initiate cranking with the ignition on and the gas valve closed. Allow 3-5 seconds before opening the gasvalve to allow for a purge cycle in the engine. Fresh air pumped through the engine will aid in removingany unburned air/fuel mixture from a previous shutdown or previous start attempt. The purge cycle helpsto reduce the possibility of exhaust explosions.NOTE: Minimum cranking speed is 100 RPM. For ATGL Starting and Running Recommendationssee S-9064-4 (or most current version) and for ATGL Heater Recommendations seeS-9064-2 (or most current version) in the Waukesha General Technical Data Book.4. Activate the breather motor upon cranking. Engine fuel supply compressors to be started prior to crankinitiation.NOTE: Operating the breather before starting and after shutdown draws air into the crankcase whichmixes with combustible gases making a combustible mixture. This increases the possibility ofa crankcase explosion.5. Disengage the starters when the engine reaches 250 RPM (or the speed determined at site to terminatecranking). Discontinuing cranking after failing to start in 15-20 seconds protects the starters fromoverheating. If the engine fails to start after 15-20 seconds, simultaneously discontinue cranking the closethe fuel valve and turn off the ignition. Upon restart follow the instruction in item #3. (Recommend amaximum of three crank attempts). This will allow the exhaust system to purge on the next crank attemptto reduce the possibility of exhaust explosions. The ignition is turned off by:· Magneto Ignition: Ground "G" lead on ignition harness.· Waukesha CEC® Ignition Module: Interrupt the power supply to the ignition module.6. The prechamber fuel valve must open after the engine speed reaches 200 RPM (if Waukesha logic hasbeen removed). Logic to provide speed adjustment to 600 RPM.NOTE: AT engines equipped with Deltec fuel systems are supplied with a speed switch that activatesthe main fuel valve at 125 RPM. Customer must provide logic to open the main fuel valve at125 RPM on increasing speed and close at 125 RPM on decreasing speed. Failure to do sowill result in a continuous flow of fuel to the engine while the engine is shutdown.7. Activate shutdown devices after starting as follows:· Oil Pressure: Five seconds after the starters disengage.· Intake Manifold Temperature: Two minutes after starters disengage.· All other temperatures and pressures immediately.8. The engine jacket water and lube oil should be operating at 100° F or higher before applying loads greaterthan 25% load.