TM-9-2540-207-14&P Sustainment Manual for A20 Heater for M113 2540-01-396-2826 Download
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TM 9-2540-207-14&P 3-2 Starting Systems Procedures (Continued). Note: For A20 Design Iteration Version 3 and up (see Section 5 for details), the diagnostic display segment steps “BB” and “DD” will appear in lower case as “bb” and “dd”. 00 - 11 - 22 - 33 - 44 - 55 - 66 - 77 - 88 - 99 - AA - BB - CC - DD - EE - FF Table 3.3-1. Diagnostic Display, Segment Steps 4. The heater then enters Stage 03. The Vent Fan speed will adjust in preparation for the ignition process and the heater will begin to deliver fuel to the Burner. A number of parameters will be monitored and components checked for failure. 5. When the heater has achieved ignition, the Ignitor automatically turns off, the Control Box Lamp illuminates, and the Diagnostic Display will read 04. 6. If all systems are operational, immediately after ignition the heater will automatically ramp the Burner and Vent Fans to full speed, the display will read 05. 7. While the heater is setting itself for full Run mode, the display will read 06. 00 Shutdown Purge Mode 01 Self Check 02 Ignitor On 03 Deliver Fuel 04 Ignitor Off 05 Full Heat Ramp 06 Enter Run Mode 07 Low Heat Mode 14 High Heat Mode 99 Vent Only Table 3.3-2. Operating Modes 3.4 Normal Operation When the heater is in Run mode, the Diagnostic Display indicates either 07 (Low Heat mode) or 14 (High Heat mode), depending on which heat mode has been selected. At any time during Start Up or Run mode the heater can be switched into Low (30,000 BTU/Hr), or High Heat (60,000 BTU/Hr). Note: The M1 Tank ONLY is equipped with the ability to run the heater in “Vent Only” Mode. In this case the Diagnostic Display reads “99", and the Control Box Lamp will flash with a cycle comprising two quick flashes followed by a two (2) second delay.