LAARS EBP 175 MBTU/h - Installation, Operation and Maintenance Instructions - Manual (Page 16)

Page 16 LAARS Heating Systems
Locate in boiler outlet piping.
8. If codes require, install suitable back flow
preventer between automatic fill valve and city
main.
9. The appliance may be installed in single and
multiple zone systems (using either zone valves
or zone circulators) in the same manner as any
other residential boiler.
Figure 22. Hydronic Piping for Systems Zoned with Circulators.
Figure 23. Hydronic Piping for Low-Temp and/or Multi-Temp Systems.
Caution
The Laars Endurance must not be direct
connected to a heating system utilizing oxygen
permeable tubing (see warranty). Provide a water
to water heat exchanger between systems to
prevent corrosion of tank or other components.
Non-toxic heating system antifreeze may be
added to the hydronic system provided that the
concentration does not exceed 35% and the
antifreeze contains an anti foamant.