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ZSR103 Zone Pump Relay 3 Zone Caleffi Part Number_E149 Our HVAC supply store offers F780 150SHP+2*GMX24 MFT T X1 N4 Our HVAC supply store offers competitive prices and fast shipping for all your electrical needs including high temperatures and corrosive fluids Caleffi Zone Pump Relay (ZSR103) The Caleffi ZSR103 Zone Pump Relay provides precise control and sequencing for up to three zones in hydronic heating and cooling systems Key Features: Controls up to three zones independently Adjustable time delays for pump sequencing LED indicators for clear status monitoring Built in dry contacts for remote alarm or control Versatile power input options (24VAC VDC or 120 240VAC) Benefits: Optimizes system efficiency by minimizing pump run times Prevents pump short cycling and premature failure Provides remote monitoring and control capabilities Adaptable to a wide range of system configurations Applications: Hydronic heating systems Hydronic cooling systems Geothermal systems Solar thermal systems Technical Specifications: Number of Zones: 3 Power Supply: 24VAC VDC or 120 240VAC Output: Dry contacts (SPDT) Dimensions: 4
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