03-12-2014, 07:22 AM
Forest,
Remove the cover above the burner revealing the 4 thermostats. The lower thermostat with the red reset button is the 120/240 vac high limit thermostat.
It has four terminals. The bottom two feed the two electric elements. One of the bottom terminals has two wires (leg 1 to each of the two elements) and the other terminal has one wire (leg 2 to the 240 vac element). Put the switch leg in the single wire to interrupt the second leg to stop the 240 vac element from working.
Another place to put a switch leg that may be better is leg 2 between the silver grey solenoid mounted on the wall and the top of the heater where the shore power enters the heater. Open the cover on the side of the heater and put a switch in one of the two legs. Choose leg 1 and neither element will work. So be sure to choose leg 2. I like this location best but one needs to know which leg he is placing the switch in to get it right.
Work with the interior electric switch in the OFF position to de-energize shore power to the heater. There will be power at the relay but not beyond the relay down to the heater. Use VOM to verify the heater is de-energized. But then I know you would do that anyway Forest.
Remove the cover above the burner revealing the 4 thermostats. The lower thermostat with the red reset button is the 120/240 vac high limit thermostat.
It has four terminals. The bottom two feed the two electric elements. One of the bottom terminals has two wires (leg 1 to each of the two elements) and the other terminal has one wire (leg 2 to the 240 vac element). Put the switch leg in the single wire to interrupt the second leg to stop the 240 vac element from working.
Another place to put a switch leg that may be better is leg 2 between the silver grey solenoid mounted on the wall and the top of the heater where the shore power enters the heater. Open the cover on the side of the heater and put a switch in one of the two legs. Choose leg 1 and neither element will work. So be sure to choose leg 2. I like this location best but one needs to know which leg he is placing the switch in to get it right.
Work with the interior electric switch in the OFF position to de-energize shore power to the heater. There will be power at the relay but not beyond the relay down to the heater. Use VOM to verify the heater is de-energized. But then I know you would do that anyway Forest.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area