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Key Benefits Staged Element Activation: Effectively sequences up to four heater banks to eliminate massive instantaneous electrical draws
The 13-511-B15 is rated for saturated steam service up to 250°F (121°C)
By keeping the sump warm
This OEM Bard relay functions by introducing a specific delay in the control circuit
White-Rodgers F84-0433 Valve Assembly Key Benefits Staged Element Activation:The White Rodgers F84 0433 Valve Assembly is a high performance replacement component engineered for 3 4 inch hydronic zone valves, specifically serving as a direct fit for 1,300 series models including the 1311 102 (3 wire) and 1361 102 (2 wire). For veteran contractors, this assembly is the correct choice for restoring precise flow control and pressure regulation in residential and light commercial boiler systems without requiring a full valve body
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