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| NFPA99 |
| CAN/CSA |
| A901 |
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| A902 |
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| A903 |
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| Level 1 |
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| Level 2 |
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| ② |
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| ④ | ④ |
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| ④ | ④ | ||||
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| C.V. | S | L.A. | R.A. | R.V. | C.V. | S | L.A. | R.A. | R.V. | C.V. | S | L.A. | R.A. | R.V. | C.V. | S | L.A. | R.A. | R.V. | C.V. | S | L.A. | R.A. | R.V. | C.V. | S | L.A. | R.A. | R.V. | C.V. | S | L.A. | R.A. | R.V. |
| a. Overcrank | X | X | X | X | X | X | X | X | O | O | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | O | O | X | X | X | O | O |
| b. Low Water Temperature | X | — | X | X | X | X | — | X | O | O | X | — | X | X | X | X | — | X | X | X | X | — | X | X | X | X | — | X | O | O | X | — | X | O | O |
| c. High Engine Temp. Prealarm | X | — | X | X | X | O | — | O | — | O | X | — | X | X | X | O | — | O | O | O | X | — | X | X | X | — | — | — | — | — | ⑤ | — | X | O | O |
| d. High Engine Temperature | X | X | X | X | X | X | X | X | O | O | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | O | O | X | X | X | O | O |
| e. Low Lube Oil Pressure Prealarm | X | — | X | X | X | X | X | O | — | O | X | — | X | X | X | O | — | O | O | O | X | — | X | X | X | — | — | — | — | — | ⑤ | — | X | O | O |
| f. Low Lube Oil Pressure | X | X | X | X | X | X | X | X | O | O | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | O | O | X | X | X | O | O |
| g. Overpeed | X | X | X | X | X | X | X | X | O | O | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | O | O | X | X | X | O | O |
| h. Low Fuel Main Tank | X | — | X | X | X | O | — | O | O | O | X | — | X | X | X | X | — | X | X | X | X | — | X | X | X | — | — | — | — | — | ⑤ | — | X | O | O |
| i. Control Switch not set in Auto | X | — | X | X | X | O | — | O | — | O | — | — | — | — | — | X | — | X | X | X | X | — | X | X | X | — | — | O | — | O | ⑤ | — | — | — | — |
| j. High Battery Voltage | X | — | X | — | X | O | — | O | — | O | — | — | — | — | — | — | — | — | — | — | X | — | X | — | X | — | — | O | — | O | ⑤ | — | — | — | — |
| k. Low VoltageBattery | X | — | X | — | X | O | — | O | — | O | — | — | — | — | — | X | — | X | X | X | X | — | X | — | X | — | — | O | — | O | ⑤ | — | — | — | — |
| l. Lamp Test | X | — | — | — | X | X | — | — | — | — | — | — | — | — | — | X | — | — | — | — | X | — | — | — | — | X | — | — | — | — | X | — | — | — | — |
| m. Audible Alarm Silencing switch | — | — | X | X | — | — | — | — | O | — | — | — | — | — | — | — | — | X | X | — | — | — | — | X | — | — | — | — | O | — | — | — | X | O | — |
① | n. Low Starting Air Pressure | X | — | X | — | X | O | — | O | — | O | — | — | — | — | — | X | — | X | X | X | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
① | o. Low Starting Hydraulic Pressure | X | — | X | — | X | O | — | O | — | O | — | — | — | — | — | X | — | X | X | X | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| p. Air shutdown dampner when used | X | X | X | X | X | X | X | X | O | O | — | — | — | — | — | X | X | X | — | X | ③ | ③ | X | X | X | ③ | ③ | X | O | O | ③ | ③ | X | O | O |
| q. Remote Emergency Stop | — | X | — | — | — | — | X | — | — | — | — | — | — | — | — | — | O | — | — | — | — | X | — | — | — | — | X | — | — | — | — | X | — | — | — |
| r. Low Coolant Level | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | X | — | X | X | X | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| s. Battery Charger AC Failure | X | — | X | — | X | O | — | O | — | O | — | — | — | — | — | — | — | — | — | — | X | — | X | — | X | — | — | O | — | O | ③ | — | — | — | — |
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KEY
C.V.: Control
S:Shutdown of EPS
L.A.: Local Audible contacts.
R.A.: Remote Audible contacts.
R.V.: Remote Visual contacts.
X:Required
O:Optional
①: Items “N” or “O” apply only when applicable as a starting method.
②: NFPA99 requires an audible alarm for all alarm and shutdown functions. May be connected to L.A. contacts.
③: Air Damper Closed and is available on
④: R.A. and R.V. relays not supplied in model A902 or A903, optional.
⑤: Circuits and indicators supplied without labels.
Table
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