FIGURE 6
* Reduced pressure back flow preventer must be used under provisions required by the
Environmental Protection Agency, (EPA).
6. Bypass piping is an option which gives the ability to adjust the supply boiler water
temperature to fit the system or condition of the installation. Although, this method of
piping is not typically required for baseboard heating systems.
A. This method is used to protect boilers from condensate forming due to low temperature
return water. Generally noticed in large converted gravity systems or other large water volume
systems. See figure 6 below.
B. These methods are used to protect systems using radiant panels and the material
they are encased in from high temperature supply water from the boiler and protect the boiler
from condensation. See figures 7 and 8 on page 8.
C. This method is used to protect boilers from condensate forming as well as
protecting the heating system from high water temperature. See figure 8 on page 8.
7. Note: When using bypass piping, adjust valves A and B until desired system
temperature is obtained.
8. Bypass loop piping must be the same size piping for the supply and return.
PAGE 7
BYPASS PIPING
