2 Zone Boiler Piping Diagram. The boiler heats the water and circulates it through zone 2 only - zone 1 does not heat up because the valve for zone 1 is closed. As zone valves open close or modulate and as system pumps vary speed the boiler loop is not impacted.
Application type diagram see installation manual for complete instructions. Do not use cast-iron circulators. Monday December 01 2014 Modern Hydronic Designs For Condensing Boilers 7.
The minimum pipe size for connecting the boiler is 1 ½ for the Mod Con 300 VWH and 2 for the 500 and 850 models.
Boiler and secondary system loops Closely spaced tees or a mixing manifold Prevents flow in one circuit from interfering with another Example. This boiler is. The boiler is. Hot Water Boiler Piping Zone Valves - Boiler piping zone valves are used for zoning hot water systems where multiple zones are neededHot water system zoning can also reduce energy cost because hot water heat zones which are not needed can be shut down thereby reducing boiler runtime to provide hot water heat for those specific zones.
