Run around coil schematic diagram
Run around coil schematic diagram
(OP)
I am looking for a typical closed loop run-around coil schematic diagram where multiple exhaust air coils are connected to various outside air coils through the common run-around loop. Apreciate if someone can provide information on how to sequence the control with a diagram, if possible.
Thanks
Thanks





RE: Run around coil schematic diagram
RE: Run around coil schematic diagram
Sequence is pretty simple - if you want to recover cooling, just run the pump and fully open the AHU coil valve and close the bypass any time OAT >80°F (adj). Keep pump off during OATs between 55°F (depending on AHU DAT desired) and 80°F. Below 55°F OAT, run the pump and modulate the AHU HR valve (and bypass inversely) to maintain coil disch. air temp. In a humidified building you also may need to think about an exhaust coil frost protection sequence that bypasses the AHU coil if the water entering the EAHU is below the dew point of the exh. air entering the EAHU coil.
RE: Run around coil schematic diagram