An installer is asked to use a pellet-fired boiler to supply heat to two zones of low-temperature radiant floor panels. The system includes a three-way motorized mixing valve to reduce the supply water temperature to the distribution circuits.
A heating contractor who’s trying out his first wall-mounted mod/con boiler installs it as shown above. When buying the boiler, the contractor was told to use a pair of closely spaced tees to separate the boiler and distribution system.
A designer needs to tie in an indirect water heater to a multiple boiler system. He selects a hydraulic separator for the project and connects the piping of the indirect water heater on the same side as the boilers.
An installer sets up a zoned distribution system. To keep it simple, he uses the same size piping for the headers and all the distribution circuits. The heat source is a low-mass copper tube boiler with high flow resistance.
For plumbers in Flint, Mich., “it’s been a heck of a year,” said Harold T. Harrington, a master plumber and pipefitter working as the business manager for Flint’s United Association of Plumbers and Pipefitters, Local 370. Read more stories in 2017 March Issue.