We installed a Navien 240S natural gas in our house, and it is working fine.
Except the short range for hot water valves in the showers. So, in other words, I need to turn shower valve almost all the way on to start the hot water. This leaves us a very small range to adjust hot water when taking a shower. My plumber explained that it is because the sensor is triggered only with a certain water flow. In general, the water pressure is high already. But there is just not enough flow until I turn the faucet almost all the way on.
Is there way to adjust the flow sensitivity for the sensor in the water heater?
My plumber suggests the following: He can install some flow controls on the cold water pipe in each shower and set them to desired temperature range.
Is this a good solution?
I find it strange that I cannot adjust that sensor on the unit.