【正文】 ) The controller programmable clock should be capable of being permanently disabled without alarm.（不報(bào)警不動(dòng)作 ）17 / 32 If the engine fails to start after pletion of 6 attempttostart cycles from the primary start system, the controller should initiate an alarm to the control room and automatically continue with start attempts from the secondary start system. Panel logic should control the fire water pump starting sequence in accordance with NFPA 20. Variance from NFPA rest intervals (15 secs) and cranking times (15 secs) will be subject to Company’s approval. The controller l。 Famp。 G panel, but should only be capable of local stopping. All electrical, electronic instruments and accessories should be certified for a Div 2 hazardous area. The fire water pump system should start automatically if the firewater main pressure, sensed by the adjustable pressure switch installed on the fire water main, falls below a preset level or the system receives a remote signal from Famp。G panel Manually activation of fire alarm push buttons anywhere Manually start stations at each helideck access platform if applicableEach fire water pump should have controls and indications in pliance with NFPA 20 and should have an approved local control panel and a gauge panel.Confirmed hydrocarbon detection in the air inlet of the fire pump should inhibit start of that pump and should stop the pump if it is already running.Fire detection at the fire pump should inhibit start of that pump and should not stop the pump if it is already running.The logic of the fire pumps starting and operation should be as follows:On a start signal the duty pump in sequence should start immediately. If the duty is not available or if preset ring main pressure (PSL) is not established within 15 seconds (adjustable) the standby pump should start automatically.The weekly test run of the fire pumps will be manually started. Instrumentation, Engine Panel and Fire Pump Controller16 / 32 All instrumentation and controls should meet the requirements of following related project specifications.? General Instrumentation, ? Instrumentation Installations, Calibration amp。 ShutdownOnce started, the fire water pumps should not be shutdown by automatic means except driver overspeed. The fire water pumps should be shutdown by manual means at the fire water pump only. If the primary pump fails to start or not able to keep the required pressure/flow rate, the standby pump should start automatically.The following signals from the Famp。s inlet flange. The cooler39。s responsibility.The air intake system should be constructed from noncorroding materials suitable for a marine environment.The intake air cleaner(s) should be engine mounted renewable, dry type plete with service indicators. The cleaner(s) should be of sufficient capacity to protect the working parts of the engine from dust and grit under the environmental conditions specified herein. Exhaust SystemThe engine should be supplied with an engine exhaust system prised of a flexible connection at the engine exhaust flange (each for dual manifolds) and a loose supplied exhaust spark arresting type silencer(s) with plugged condensate drain connection. Spark arrestors should be dry cyclone or baffle type and of corrosion resistant material. The silencer should be hot dip galvanized（熱鍍鋅） or coated in accordance with project painting specification. The silencer should be properly sized for the engine, suitable for horizontal mounting and be plete with mounting brackets, vibration mounts, panion flanges and drain fitting.The flexible exhaust joint should be 316 corrugated stainless steel types. Interlocking element style should not be used. 12 / 32The engine should be supplied with nonsparking brass epoxy coated guards constructed to OSHA standards or PRC government relevant requirements at all drive couplings, exposed shafts and flywheels. Any belt drives should be antistatic and fire resistant. One spare set of belts should be provided with the engine.The surface temperature of the engine and all ancillaries such as exhaust manifold, exhaust piping, and after cooler should not exceed the T3 temperature as defined by NFPA 70 (200248oC/392478oF).Exhaust manifold, exhaust system to skid edge and depression port to atmosphere and after cooler, if provided, should be water jacketed to meet surface temperature limits. Insulation will not be acceptable for these items. All other surfaces of the exhaust system, piping silencer, flanges and expansion bellows should be insulated to limit full load surface temperature. (為什么限制排放管表面溫度？如何實(shí)現(xiàn)？)Every precaution should be taken to provide a gastight insulation system. Joints between insulation blocks, joints between stainless steel protection sheets, around flange boxes, around the expansion bellows, and between the insulation and the exhaust manifold surface should be sealed.（如何實(shí)現(xiàn)gas－tight insulation）The antivibration（抗震） mounts should be assessed whether are required between the driver and the skid base. Sizing of vibration mounts should be on the basis of expected dynamic forces and noise.（震動(dòng)大小取決于動(dòng)力強(qiáng)度和噪音） Batteries and Chargers Batteries should be located outdoors on the equipment skid. Chargers should be located indoors in the switchgear room. Two sets of batteries should be required. Each should consist of a group of Lead Acid batteries, cell vent type, with pocket plates. （袖珍銘牌 ） Battery materials should be suitable for installation outdoors in a offshore environment with minimum guarantee life of 1 year. Enclosures for Batteries should be rated NEMA 3R and should be made of fiberglass 13 / 32with a hinged, removable lid. Intercell connectors should be lead coated copper straps. Circuit breakers should be provided to allow each battery bank to be isolated from