Forum Discussion
Old-Biscuit
Nov 28, 2015Explorer III
The snap disc t-stats that Atwood uses on their DSI (Electronic Ignition) water heaters are pre-set.
Normal t-stat is 140*F and the ECO (energy cut off....high temp) is 180*F
The adjustable replacement for the normal can be set for 110*F to 150*F
The mounting bracket is flimsy cheapo thin metal that slips under lip of opening where disc goes and the spring is light weight. It does work but could be a better design.
It is open to exposure and can get corroded ---then break when attempting to make any adjustment.
Reason for the high temp normal (140*F) Atwood uses is to get more hot water out of the small tank size (6 or 10 gallon)
End user controls temp at faucet by mixing cold/hot together
Suburban uses 130*F and has an optional 120*F set (t-stats come in a combined set normal/ECO connected to each other) so can't be interchanged with Atwood
The Atwood 91470 t-stat is 120*F (Atwood FINALLY offering a lower preset)
Only thing is with snap disc preset they have a range from closed to open typically 30*F
The 140*F OEM doesn't reclose until 110*F for reheating so the 120*F one might not reclose until 90*F.
If that is the case you will notice large temp swings in water from WH
Mildly hot to warm.
YES the t-stats are low voltage ever since 2004 when Atwood changed to circuit board controlled with front mounted t-stats
And the terminals on normal are smaller than the ones on ECO so they aren't mixed up when installing
Normal t-stat is 140*F and the ECO (energy cut off....high temp) is 180*F
The adjustable replacement for the normal can be set for 110*F to 150*F
The mounting bracket is flimsy cheapo thin metal that slips under lip of opening where disc goes and the spring is light weight. It does work but could be a better design.
It is open to exposure and can get corroded ---then break when attempting to make any adjustment.
Reason for the high temp normal (140*F) Atwood uses is to get more hot water out of the small tank size (6 or 10 gallon)
End user controls temp at faucet by mixing cold/hot together
Suburban uses 130*F and has an optional 120*F set (t-stats come in a combined set normal/ECO connected to each other) so can't be interchanged with Atwood
The Atwood 91470 t-stat is 120*F (Atwood FINALLY offering a lower preset)
Only thing is with snap disc preset they have a range from closed to open typically 30*F
The 140*F OEM doesn't reclose until 110*F for reheating so the 120*F one might not reclose until 90*F.
If that is the case you will notice large temp swings in water from WH
Mildly hot to warm.
YES the t-stats are low voltage ever since 2004 when Atwood changed to circuit board controlled with front mounted t-stats
And the terminals on normal are smaller than the ones on ECO so they aren't mixed up when installing
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