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Installation Instructions
Singular Combi Boiler - BTC 439003301 B (2021/07)
4.6 Examples of System Applications
Refer to the following examples to properly implement a system for space heating,
DHW supply, or both. These examples are provided to suggest basic guidelines
when you install the boiler system. However, the actual installation may vary
depending on the circumstances, local building codes, or state regulations. Check
the local building codes and state regulations thoroughly before installation, and
comply with them fully.
4.6.1 System Application – Zone System with Zone Valves
Figure 18
Zone Valve
Zone 1 Zone 2 Zone 3
System pump
Air Separator
Expansion tank
Not to exceed 4 pipe Dia or Max. 12 in
Purge Valve
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