Bob Barrows
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Hi everyone.
I just had a Superstor tankless water heater installed yesterday. It's Sat. so i cannot contact the installer, therefore I came here.
I told the plumber who was installing the deater that the tap water had always seemed to be too hot with the old water heater and that adjusting the thermostat seemed to have no effect. So he told me he used a new thermostat and set it to 125. When I checked it today it still seemed very hot, so I used an instant-read thermometer to check the temperature of water dispensed into a coffee cup: it registered 154 degrees (F)! So, I opened the thermostat and sure enough, it was set to 125.
Is it typical for tap water to register 30 degrees above the setpoint? A possible theory is that the thermostat only controls the lowest temp that the water in the tank is allowed to reach, and that the water is allowed to get as hot as the furnace/boiler will get it to. if that's the case, then there is nothing wrong with the thermostat, is there.
I'm considering turning it down to 100, but, if the above theory is correct, I may be allowing it to get too cool to kill bacteria ...
Am I testing the right thing? Could the water coming from the furnace/boiler be too hot? Any advice?
Bob
I just had a Superstor tankless water heater installed yesterday. It's Sat. so i cannot contact the installer, therefore I came here.
I told the plumber who was installing the deater that the tap water had always seemed to be too hot with the old water heater and that adjusting the thermostat seemed to have no effect. So he told me he used a new thermostat and set it to 125. When I checked it today it still seemed very hot, so I used an instant-read thermometer to check the temperature of water dispensed into a coffee cup: it registered 154 degrees (F)! So, I opened the thermostat and sure enough, it was set to 125.
Is it typical for tap water to register 30 degrees above the setpoint? A possible theory is that the thermostat only controls the lowest temp that the water in the tank is allowed to reach, and that the water is allowed to get as hot as the furnace/boiler will get it to. if that's the case, then there is nothing wrong with the thermostat, is there.
I'm considering turning it down to 100, but, if the above theory is correct, I may be allowing it to get too cool to kill bacteria ...
Am I testing the right thing? Could the water coming from the furnace/boiler be too hot? Any advice?
Bob