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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 1247 March 31, 2006 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Change Title To Reference Engines For Driving Stationary Fire Pumps 2. Addition Of Requirements To Address Engines Provided With An
2、 Electronic Control Module (ECM) And Revisions Related To Mechanical Fuel Management Control 3. Revisions To Clarify Requirements And Maintain Consistency With Existing Testing Practices 4. Revisions To Address Electrical Connection Standardization 5. Addition Of Requirements For Protecting The Air
3、Induction System From Direct Water Impingement Earlier versions of several of the following proposals were included in the July 11, 2005 preliminary review work area. Since extensive and signifi cant revisions have been made, updated proposals are being circulated for another round of preliminary re
4、view and possible revision before advancing to ballot. A single comment was submitted as follows during the previous preliminary review: COMMENT: Engines provided under this section of UL 1247 that are equipped with an Electronic Control Module (ECM) shall be equipped to interface with an automatic
5、diesel engine controller. The engine manufacturer shall provide the necessary engineering data to the controller manufacturers to allow the controller manufacturer the opportunity of developing an interface connection that will be a standard for the industry. The voltage used for controls within the
6、 engine mounted components are lower than the operating voltages of the controller. All engines and controllers must refl ect the same interface requirements or specify any additional terminal strip and control components needed to insure the automatic operation of the ECM equipped engine. The engin
7、e controller for ECM equipped engine will be basically the same engine controller as used for lower level engines using standard control systems. A special interface or option list will be required to insure compatibility with the engine and controller terminal strips and features. SUGGESTED REVISIO
8、N BY COMMENTER: 7.2 Electronic Fuel Management Control - Add new section number 7.9 For an engine equipped with electronic fuel management control, a common terminal strip shall be mounted on the engine includes all standard control features and the required ECM control features. The functions of ea
9、ch contact point shall match the terminal strip included in the attached automatic diesel engine controller. UL agrees in part with the comment and the proposed new 11.8 with Figure 11.1 addresses this issue. The comment was to limit the terminal strip criteria to only electronic fuel management con
10、trolled engines, but the proposal applies to all engines. The new criteria should apply to all engines, not just Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/16/2006 03:01:29 MDTNo reproduction or
11、 networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION the electronically controlled engines. Also, the suggested revision indicated that the terminal strip was to match the terminal strip on the controller. While that is the intent, the re
12、quirements for a fi re pump controller are outside the scope of UL 1247 and cannot be referenced in this standard. For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown lined-out. 1. CHANGE TITLE TO REFERENCE ENGINES FOR DRI
13、VING STATIONARY FIRE PUMPS BACKGROUND This proposal is for preliminary review only (no ballot at this time). Therefore, replies will not be provided to comments received during this preliminary review period. After comments are considered, and it has been determined whether or not adjustments need t
14、o be made to the proposal, the proposal will be advanced to ballot. At that time E-mail notifi cation will be sent that another Work Area has been opened and the STP will be asked to vote on whether or not the proposal should be adopted. The proposal will again be open for comment at that time. RATI
15、ONALE Revisions to the Standard for the Installation of Stationary Pumps for Fire Protection Service, NFPA 20 have resulted in the introduction of requirements for pumps other than centrifugal fi re pumps. UL is proposing to revise the title of UL 1247 to reference the application of engines covered
16、 by this standard to drive the various types of stationary fi re pumps referenced in NFPA 20. PROPOSAL UL Standard for Safety for Diesel Engines for Driving Centrifugal Stationary Fire Pumps, UL 1247 2. ADDITION OF REQUIREMENTS TO ADDRESS ENGINES PROVIDED WITH AN ELECTRONIC CONTROL MODULE (ECM) AND
17、REVISIONS RELATED TO MECHANICAL FUEL MANAGEMENT CONTROL BACKGROUND This proposal is for preliminary review only (no ballot at this time). Therefore, replies will not be provided to comments received during this preliminary review period. After comments are considered, and it has been determined whet
18、her or not adjustments need to be made to the proposal, the proposal will be advanced to ballot. At that time E-mail notifi cation will be sent that another Work Area has been opened and the STP will be asked to vote on whether or not the proposal should be adopted. The proposal will again be open f
19、or comment at that time. RATIONALE The technology for diesel engine fuel management systems has been changing in recent years to address concerns related to fuel efficiency and environmental regulations. Electronic fuel management systems rather than mechanical systems are commonly used today in man
20、y diesel engine applications. The most recent edition of NFPA 20 includes new requirements for engines fi tted with an Electronic Control Module (ECM). MARCH 31, 2006SUBJECT 1247-2- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University
21、/5618801100 Not for Resale, 10/16/2006 03:01:29 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION UL is proposing to add new construction and test requirements for engines fi tted with ECMs. These requirements are
22、intended to be consistent with those referenced in NFPA 20. The new requirements related to engines fi tted with ECMs are referenced in Sections 6, 7, 20, 21, 22 and 23. Also, 7.1 has been revised to include requirements specifi c to mechanical fuel management controlled engines and the provision fo
23、r manual override of governor solenoids mounted externally to the governor. PROPOSAL 6.1 The following instrumentation and control devices shall be securely mounted on the engine: a) A tachometer to indicate engine rpm, including zero, at all times. Tachometers with digital display shall be permitte
24、d to be blank when the engine is not running. If the tachometer is not of the totalizing type, an hour meter shall be provided to indicate total time of operation; b) An oil pressure gauge to indicate engine lubricant pressure; c) A graduated temperature gauge with numerical indication of the temper
25、ature, to monitor the primary coolant loop temperature; d) A high temperature switch to monitor the engine coolant temperature. At a specifi ed high temperature level, the switch shall close and activate a signal; e) An ammeter or voltmeter(s) to indicate the direction of alternator or generator cha
26、rge; f) A pressure gauge, if pneumatic or hydraulic starting is used, to monitor reservoir pressure; g) A lubricant low pressure switch to monitor engine lubricant pressure. At a specifi ed low pressure level, the switch shall close and activate a signal; h) An adjustable governor that is lockable a
27、t the required setting; i) An overspeed shutdown switch (which requires manual resetting) to shut down the engine when its speed exceeds 120 percent of its rated speed; j) A speed-sensitive switch or equivalent to signal engine running and crank termination conditions; k) For an engine equipped with
28、 electronic fuel management control, a manually operated selector switch, which has no off position, shall be provided and a supervisory signal provided when the electronic control module (ECM) selector switch is positioned to the alternate ECM; l) For an engine equipped with electronic fuel managem
29、ent control, a visual indicator shall be provided when the ECM selector switch is positioned to the alternate ECM; and m) For an engine equipped with electronic fuel management control, a common supervisory signal shall be provided for either fuel injection failure or low fuel pressure, as applicabl
30、e. 7 Speed Governor 7.1 An engine shall be equipped with an adjustable speed governor preset to maintain the engine speed within a range of no more than 10 percent variation between no load and maximum load conditions. MARCH 31, 2006SUBJECT 1247-3- Copyright Underwriters Laboratories Inc. Provided b
31、y IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/16/2006 03:01:29 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 7 Fuel Injection and Speed Control 7.1 Mechanical
32、 fuel management control 7.1.1 Mechanical fuel management control shall provide a mechanical means to control engine speed and the fuel injection process. 7.1.2 A governor control DC solenoid utilizing battery current shall be permitted for run-stop control. 7.1.3 A governor control solenoid mounted
33、 externally to the governor that does not require energy for the engine to run, shall be provided with a manual means to allow the engine to run in the event of solenoid failure. 7.1.4 The engine shall be equipped with an adjustable speed governor to maintain the engine speed within a range of no mo
34、re than 10 percent variation between no load and maximum load conditions. 7.2 Electronic fuel management control 7.2.1 Electronic fuel management control as referenced herein incorporates an electronic means, such as a Electronic Control Module (ECM), to control engine speed and the fuel injection p
35、rocess. 7.2.2 An electronic fuel controlled engine shall be equipped with a primary ECM and an equivalent functioning alternate ECM to control the fuel injection process. 7.2.3 The primary and alternate ECM and selector switch shall be permanently mounted and wired. The selector switch shall be inst
36、alled in an enclosure having a minimum Type 2 rating. The primary and alternate ECM and selector switch shall comply with the applicable requirements of the Standard for Industrial Control Equipment, UL 508 and the Standard for Fire Pump Controllers, UL 218. 7.2.4 The engine shall be equipped with a
37、n adjustable speed governor to maintain the engine speed within a range of no more than 10 percent variation between no load and maximum load conditions. 7.2.5 Both the primary and alternate ECMs shall be protected from transient voltage spikes and reverse dc current. 7.2.6 An ECM shall be designed
38、or programmed to not intentionally cause a reduction in the engines ability to produce the rated power output for any reason such as high coolant temperature, low lubricant pressure, or the like. 7.2.7 Redundant sensor(s) shall be provided when a sensor is necessary for the function of the ECM and a
39、ffects the engines ability to produce its rated power output. Redundant sensors shall be arranged to operate automatically in the event of a failure of the primary sensor. 7.2.8 Redundant sensors are not required for non-critical sensor(s) that do not affect the engines ability to produce its rated
40、power output. 20.6 Electronic fuel management control 20.6.1 In addition to demonstrating compliance with 20.2 and 20.3 with the primary ECM operating under normal conditions, an engine equipped with an electronic fuel management control shall be tested to demonstrate that the maximum sustainable po
41、wer output at the maximum rated speed is provided as described in 20.3 when subjected to the test conditions described in 20.6.2 20.6.8. MARCH 31, 2006SUBJECT 1247-4- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not
42、 for Resale, 10/16/2006 03:01:29 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 20.6.2 The engine, with the dynamometer connected, is to be started and operated under each of the fault conditions described in Ta
43、ble 20.2. Table 20.2 Start-up tests under fault conditions TestECMPrimary SensorsNon-Critical SensorsRedundant Sensors APrimary SelectedFunctionalNon-functionalNon-functional BPrimary SelectedNon-functionalNon-functionalFunctional CAlternate SelectedNon-functionalNon-functionalFunctional DAlternate
44、SelectedFunctionalNon-functionalNon-functional EAlternate SelectedNon-functionalFunctionalFunctional 20.6.3 After completion of the starting tests described in 20.6.2, an engine with dynamometer connected and primary ECM selected with sensors operating as intended, is to be started with a crank sign
45、al time differential to Terminal 9 or 10 after energizing Terminal 1 varied from +1.5 seconds to 1.5 seconds in 0.3 second intervals. 20.6.4 In addition to the starting tests described in 20.6.2 and 20.6.3, the following fault conditions shall be established while the engine is operated at the maxim
46、um rated speed and power with the primary ECM selected: a) While engine is operating, activate the high temperature switch. b) While engine is operating, activate the low lubricant pressure switch. c) While engine is operating, disconnect all non-critical ECM sensor(s). d) While engine is operating,
47、 disconnect all primary ECM sensor(s). e) While engine is operating, disconnect all redundant ECM sensor(s). f) While engine is operating with 9 volts provided to the ECM for 12-volt systems, or 18 volts provided to the ECM for 24-volt systems. 20.6.5 The tests described in 20.6.4 are then to be rep
48、eated with alternate ECM selected. 20.6.6 The functioning of the ECMs shall then be tested after a simulated loss of power. With the primary ECM selected, adjust the speed to approximately 50 rpm higher or lower. The engine shall then be stopped and both batteries disconnected for 1 minute. The batt
49、eries are then to be reconnected and the engine restarted. The engine shall return to the adjusted speed. 20.6.7 The test described in 20.6.6 is then to be repeated with the alternate ECM selected. 20.6.8 An engine shall be operated at each condition described in 20.6.2 20.6.7 for at least 5 minutes. MARCH 31, 2006SUBJECT 1247-5- Copyright Underwriters Laboratories Inc. Provided by IHS under license wit