The Grundfos ALPHA2 26-99 F is a medium sized, cast iron, energy efficiency circulator fitted with a permanent magnet motor (ECM) and frequency converter for heating applications. Featuring eight different operating modes including constant pressure AUTOADAPT and proportional pressure AUTOADAPT, the ALPHA2 26-99 F is the perfect fit for any heating application. AUTOADAPT functionality enables the ALPHA2 26-99 F to control operation automatically within a defined performance range. When set in proportional pressure AUTOADAPT or constant pressure AUTOADAPT, the pump will automatically analyze the heating system, find the optimum system curve and duty point and continue to adjust its operation to changes in demand. A magnetite resistant design, robust ceramic shaft and stainless-steel bearing plate ensure that the ALPHA2 26-99 F reliably delivers the optimal system flow at the lowest possible energy consumption.

Grundfos Circulator Pump, ALPHA2 26-99F Model, 115 VAC, 0.05 to 1.7 A, 60 Hz, 3 to 120 W, 26 gpm, 1, 1-1/4 in, Flanged, 145.04 psi, 32.48 ft Maximum Head, Composite Impeller, Cast Iron Body, 32 to 131 deg F Ambient, 14 to 203 deg F Liquid

• Eight intelligent control modes: three defined proportional pressure curve settings, three defined constant pressure curve settings, constant pressure AUTOADAPT, proportional pressure AUTOADAPT
• Magnetite resistant design protects the pump from harmful iron oxide found in heating systems
• Designed with trusted ECM technology which has been used by Grundfos for more than 16 yr
• System and pump protection warning and alarm indicators
• LED light indicators for pump settings and alarms
• Easy-to-use push button control settings
• Designed using 65+ year of hydronic heating experience
• Check valve included

• Specification Sheet https://assets.unilogcorp.com/267/ITEM/DOC/Grundfos_99490916_Specification_Sheet.pdf