Caleffi ZVR103 Relay 326070 701 Always follow cross pattern tightening specifications Always follow cross pattern tightening specifications to ensure uniform compression across the gasket surface Integrating these precision engineered parts optimizes fluid control efficiency and minimizes system downtime in demanding commercial environments a call for heat on Zone 1 will temporarily deactivate other zones to ensure maximum heat delivery to the DHW tank or priority loop Contractor Friendly Wiring: Large screw terminals and dual labeled (R
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