| Author |
Message |
lloyd brown
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 28, 2004 - 6:13 am: | |
Replacing 225 amp factory alternator with 24 volt alternator with built-in regulator. How do I bypass MC9 regulator and still feed the field relay and feed the discharge relay and blower cut-in as well as the Penn. air switch which is part of alarm and tell-tale wiring? |
Stan
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 28, 2004 - 8:58 am: | |
If the new alternator is the one wire type then its field supply is obtained from the internal regulator.
The discharge and blower cut-in relays are powered from the R rerminal on the alternator. If you don't have a R terminal on the new alternator then some major re-wiring is required.
Stan |
lloyd brown
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 28, 2004 - 6:51 pm: | |
thanks,stan. appreciate your help. lloyd |
Tom Caffrey (Pvcces)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 01, 2004 - 10:15 pm: | |
Lloyd, you may be able to install a relay that is sensitive to battery voltage. With a unit like that, you could provide a substitute connection for the relay terminal.
For example, a number of battery combiner relays monitor battery voltage and when they sense the voltage is above about 13.2 in a 12 volt system, they connect the two banks together.
Pathmaker by Heart is one such unit. Some of these may not work if battery voltage is not present on both terminals, so you need to check this before buying.
Building your own unit is not out of the question, either. All the relay terminal did was provide about 1/2 of the battery voltage to your starter safety relay whenever the old alternator was putting out power.
This prevented your high-draw heating system from rapidly discharging your batteries if you had the control on, but the engine was not running. When engaged, the safety relay would prevent engaging the starter when the engine was already running.
The one wire alternator is usually very dumb and those alternators are not really designed for the kind of work that the oil cooled units could do.
Did your old one go bad?
Tom Caffrey PD4106-2576
Suncatcher |