Adjusting A Mixing Valve On Radiant Floor Heating

This will protect against component temperature failure should dirt sediment or other mechanical failure cause a mixing valve to become inoperable.

Adjusting a mixing valve on radiant floor heating.

The chief function of a control system is to modulate and limit water temperatures to maximize efficiency and to insure against over heated floors. To ensure accuracy in adjusting the temperature setting make sure that the hot water supply temperature to the mixing valve is at least 5c 10f hotter than the desired temperature of the mixed water. It is important that a boiler s high temperature limits do not exceed the maximum temperature rating of the system components. Thermostatic mixing valves are for controlling water temperatures in pex radiant floor heat solar hot water heating and other hydronic applications.

The much cooler radiant floor zones receive tempered water from the mix port of the mixing valve. Mixing valves come in three packages. The baseboard or cast iron radiator zones for example receive super hot water straight from the heat source. The schematic below illustrates this approach.

Radiant floor heating systems are very susceptible to heaitng problems due to water temperature. Therefore addition of a mixing contol to a radiant floor system will signigicantly protect your investment. A mixing valve is pre installed in this type of manifold. Overheating temperature swings underheating wood flooring shrikage carpet fiber break dow etc.