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| LAARS HEATING SYSTEMS | |||||
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Figure 18. Hydronic Piping EBP/EDP for Systems Zoned with Circulators.
Figure 19. Hydronic Piping EDP for Low-Temp and/or Multi-Temp Systems.
or zone circulators) in the same manner as any other residential boiler.
Caution
The EBP/EDP appliance 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.
4B. Use in a Combined Hot Water Heating and Chilled Water Cooling System
When the appliance is used in connection with a refrigeration system, it must be installed so that the chilled medium is piped in parallel with the boiler with appropriate valves to prevent the chilled medium from entering it.
The boiler piping system of an appliance connected to heating coils located in air handling units where they may be exposed to refrigerated air circulation must be equipped with flow control valves or other automatic means to prevent gravity circulation of the boiler water during the cooling cycle.