Armstrong Digital-Flo® Boiler Water PHE is a pre-assembled water heater package solution equipped with The Brain® Digital Recirculation Valve (DRV) for water temperature control in hot water systems. Designed specifically for continuous recirculation hot water systems, The Brain® improves system performance and safety by delivering a consistent, preset temperature to the point of use.

User safety and overall system health are maintained through a series of programmable temperature alerts, online operational self-diagnostics, and thermal eradication options. The Digital-Flo® is available in 4 standard sizes with either single-wall or double-wall heat exchangers.

System Configurations

• 'W' Models: Suitable for systems with boiler inlet temperatures above 160°F.
• 'WE' Models: Suitable for systems with boiler inlet temperatures below 160°F.

The Digital-Flo® can be customized to meet the specific requirements of various applications. As a critical component of a water safety management plan, SAGE® performance software monitors, records, and logs data. SAGE® is compatible with multiple Building Automation System (BAS) protocols, or users can access SAGE® on mobile devices via a subscription service.

Flow Rate Specifications

Model Series	Flow Rate
DF15WE40, DF15WEDW40, DF15WE40BS, DF15WEDW40BS	57 lpm (15 gpm)
DF35WE40, DF35WEDW40, DF35WE40BS, DF35WEDW40BS	132 lpm (35 gpm)
DF65WE50, DF65WEDW50, DF65WE50BS, DF65WEDW50BS	246 lpm (65 gpm)
DF90WE80, DF90WEDW80, DF90WE80BS, DF90WEDW80BS	341 lpm (90 gpm)
DF120WE80, DF120WEDW80, DF120WE80BS, DF120WEDW80BS	454 lpm (120 gpm)
DF15W40, DF15WDW40, DF15W40BS, DF15WDW40BS	57 lpm (15 gpm)
DF35W40, DF35WDW40, DF35W40BS, DF35WDW40BS	132 lpm (35 gpm)
DF65W50, DF65WDW50, DF65W50BS, DF65WDW50BS	246 lpm (65 gpm)
DF90W80, DF90WDW80, DF90W80BS, DF90WDW80BS	341 lpm (90 gpm)
DF120W80, DF120WDW80, DF120W80BS, DF120WDW80BS	454 lpm (120 gpm)