Mechanical · A-BW86B

Heating Hot Water System Reheat Control Schematic

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The heating hot water system reheat control schematic details the control wiring and mechanical connections for boilers B-1 and B-2 with associated pumps, flow switches, and variable frequency drives. The hot water system controller interfaces with status and enable/disable relays, temperature sensors, and differential pressure transmitters. Power is supplied at 460 VAC 3-phase through designated VFD units to the hot water pumps HWP1 and HWP2. Communication links connect the primary heating loop and a separate air handling unit schematic featuring outside air intake, pre-filters, cooling coils, supply fan with VFD, gas furnace, and final filters. Wiring annotations specify number 22 AWG twisted non-shielded two-conductor cables, number 18 AWG twisted shielded two-conductor cables, and pneumatic tubing.

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