Alpha Technologies AlphaGen PN-6x-T 7.5kW 48VDC - Technical Manual - Manual (Page 70)

70 042-288-B0-001, Rev. A
Fig. 5-1, Generator Set Master Switch and Run/Auto/Stop (RAS) Switch
Generator Set
Master Switch
Run/Auto/Stop
(RAS) Switch
5.0 Turn-up and Test, continued
5.3 Performing a Local APU Test
Procedure:
1. Locate the ECM and set the Run/Auto/Stop (RAS) switch to the STOP position.
2. Verify ignition battery and AC line sense connection to ECM.
3. Verify all alarms on ECM are OFF, except Tamper Alarm & Auto Mode Disabled.
4. Remove gas port plug from input side of demand regulator, install brass manometer port
connection fi tting and connect manometer to fi tting (see Section 7-9 for details).
5. Move the RAS switch from Stop to Auto.
6. Verify the engine starts within 9 crank cycles. If engine fails to start within 9 crank cycles
and Engine Over-crank is activated, the gas line needs to be purged by removing the
air fi lter and placing your hand over the carburetor throat and cranking the engine until it
starts.
7. Verify 11" of water column pressure is present at the input of the demand regulator.
8. If necessary, adjust the pre-regulator or dual regulator (located on gas bottle assembly for
propane) by removing regulator cap and adjusting for 11" ± 1" of water column pressure.
Perform under NO-LOAD condition (see Section 7.9 for details).
9. Set RAS switch to Stop.
10. Remove brass manometer fi tting and reinstall plug to demand regulator input monitoring
port using approved pipe sealant.
11. Check demand regulator input monitoring port for leaks.
12. Set RAS to Auto.
The Generator Control Board master switch will override the Run/Auto/Stop (RAS) switch on the ECM. This
switch defaults to the center (ECM) position.
NOTE: