Rheem SVC 810, Troubleshooting Manual

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SVC 810 Tankless Troubleshooting Manual
36
MIC-180 & EZ Link
There are two kinds of communications cables when manifolding multiple
tankless units. If only two like units are connected together, we call that EZ
Link. This process uses a single 6 foot long cable with four colored wires at
each end. You can recognize the EZ Link cable by the yellow wire at each
end. These cables may be plugged in either way.
The other manifolding process uses the MIC-180 control panel to connect up to 20 tankless units
at a time. These communications cables come in multiple lengths and have one end of the cable
with a single red, white and black wire. These cables must be plugged in a certain way for the
system to communicate properly. Plug the 3-wire end into the tankless water heater; plug the
other (4-wire) end into the MIC-180 control board.
MIC-180
board Tankless heater board
MIC-180 Printed Circuit Board