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Circuit Boards
Inside the Electro Industries Buffer Tank Controller's cabinet, you will find 3 circuit boards:
1. Located on the hinged door is the system controller board which makes all logic decisions as well as
interfaces the heat pump, standby heat source (if applicable) and forced air room thermostat (if
applicable)
2. A small relay circuit board, which interfaces and controls the main pump and A-Coil Pump, is located
on the side panel.
3. A larger zone control board which interfaces the hydronic zone thermostats and zone pumps is located
on the rear of the cabinet.
All system adjustments will take place on the system controller circuit board.
02/22/2012
6
HI114
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