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Old 04-04-2017, 06:27 PM   #3
Beau388
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 4,157
THOR #6411
Correct Ed. The Middleton Run coaches are wired the same. When you start the engine and the voltage in the charging circuit reaches 14 volts, there is a 90 second delay before the charging system checks the voltage in the house batteries. Should the house batteries voltage be below 12.8 volts the BIRD relay closes allowing full alternator voltage to charge the house batteries. The same circuity charges the charges the chassis battery when the generator or or shore power is powering the coach and the engine is not running. You are correct the store/use switch must be in the use position to charge the house batteries from any source. There is a 50 amp fuse and relay in the converter/charger circuit to the house batteries. Should the relay fail the house batteries can only be charged by the engine alternator. Been there!
__________________
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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