Hi,
this is a bit complicated.
We installed two separate underfloor heating system in our downstairs area.
One at 240V and according to the manufacturer at 11.9Amps. The other one also at 240V and 9.7Amps.
Because of the lack of space in the 200Amp panel, we connected them to two separate tandem breakers, each one at 2*15Amps. The panel is new and all electricians involved in this agree that it can handle tandems.
There are two thermostats one for each circuit. The thermostats can handle up to 15Amps, that's why we have two.
Here is what happens: Only one circuit will heat up! And it really depends which ones of the thermostats I crank up first.
My installer thinks it's because of the tandems. We checked and they are installed properly. Still he says it's because of the tandems (without providing further evidence).
We also talked to the underfloor heating provider. They said the tandems should be at least 20Amps. But my installer disagrees because the thermostat can only handle 15Amps each...
I was wondering what you guys think about this. Why could it be that tandems "generally" don't work for this type of installation or why 20Amps tandems might work?
Thanks
this is a bit complicated.
We installed two separate underfloor heating system in our downstairs area.
One at 240V and according to the manufacturer at 11.9Amps. The other one also at 240V and 9.7Amps.
Because of the lack of space in the 200Amp panel, we connected them to two separate tandem breakers, each one at 2*15Amps. The panel is new and all electricians involved in this agree that it can handle tandems.
There are two thermostats one for each circuit. The thermostats can handle up to 15Amps, that's why we have two.
Here is what happens: Only one circuit will heat up! And it really depends which ones of the thermostats I crank up first.
My installer thinks it's because of the tandems. We checked and they are installed properly. Still he says it's because of the tandems (without providing further evidence).
We also talked to the underfloor heating provider. They said the tandems should be at least 20Amps. But my installer disagrees because the thermostat can only handle 15Amps each...
I was wondering what you guys think about this. Why could it be that tandems "generally" don't work for this type of installation or why 20Amps tandems might work?
Thanks