Install Instructions

ManualsBrandsBosch ManualsBoilersSingular 4000 155,000 BTU Combi Gas-Fired Wall-Hung Condensing Boiler

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Installation Instructions

Singular Combi Boiler - BTC 439003301 B (2021/07)

4.6.2 System Application – Single Zone System

Figure 19

Zone 1

System pump

(optional)

Air Separator

Expansion tank

Purge Valve