Hi Kyle,
Making progress with our RV 14A. The EFII Bus Manager wiring is complete and I'm moving on to wiring the two B and C Alternator remote regulators and have some questions regarding how the AFS components connect to the regulator.
Referencing:
https://bandc.com/wp-content/uploads/2020/05/LR3D-Technical-Manual_RevIR_5-13-20.pdf#page=12with this figure. (note: the backup alternator regulator has similar connections)
image.png
Well, I have the two ground connections figured out! And the optional connections at #1 and #2 terminals I won't concern myself with at this point.
So, I conclude:
Terminal #3 "Bus Voltage Sense input". I connect with 16 AWG wire to the 8 AWG wire somewhere between the alternator and the PCU, maybe right after the shunt which is physically close to my voltage regulator.
Terminal #4 "Field output" I use the B and C provided field wire and connector from the regulator to the alternator.
Terminal #5 "Low-Voltage Warning output" I'm not sure what to do with this connection. I'm thinking this regulator warning that the alternator has failed is also noted by the AFS components with its own warning flags. I'm I correct? If so, I'm thinking I can leave this output not connected. (I couldn't find a spot on any of the three panels for an alternator warning light after a cursory inspection.)
Terminal #6 "Bus Field Supply input" I'm thinking this is what I connect the AFS "ALT FLD" wire to which is part of the Fuselage Forward wiring harness. Likewise for the backup alternator regulator, I connect the "ALT 2 FLD" wire to my backup alternator regulator. And if this is correct, are both alternator field wires coming from the PCU protected by the desired 2A "circuit breaker"?
Finally, in a somewhat related observation, last night as I looked at the AFS documentation again, it finally started to sink in what is available and I should focus on.
The PCU manual: ADVANCED PANEL and Advanced Control Module Manual v 7.5.
For my 6000 series flight displays: AF-5000/6000 Series Install Manual v 16.1.
Then the seven ACM wiring diagrams for various systems
And finally the nine RV 14 wiring documents.
I did find page 189 of the ACM manual talking about B & C Alternators but it didn't answer all my questions. Both regulators have a terminal #5 "Low-Voltage Warning output."
Thanks again,
Frank Dressel
Answers from Jonathon Severdia, Advanced Flight Systems Tech Support, 10/25/23,
Right--ignore terminals #1 & #2
Terminal #3, correct. Get system voltage from convenient source like after the shunt. Note, I will use this source for both primary and backup alternators/regulators. This wire from the shunt goes to the ACM as well as the backup alternator supply. So voltage will be sensed and accurate whether supplied by either alternators. Suggested a 20 AWG wire would be sufficient but think BandC calls for 16 AWG.
Terminal #4, correct. Use BandC wire to go from regulator to alternator.
Terminal #5, ignore also. Warning signal already in AFS system and separate light unnecessary.
Terminal #6, correct. Each regulator will get their control/activation signal from the AFS wire harness.
Ah Haa moment. Had planned to wire the two external alternator regulators outside the access hatches and then mount on right A-frame with six screws. Well, just not doable. But looking up from below, it was apparent I could install the regulators on the underside and then easily connect the wires.
The EFII Bus Manager was mounted on the top side of the right A-frame with Ziptips.