Navien NPE-180A Installation Manual page 10

3. Remove the two screws holding the PCB tray in place and pull out the PCB tray
from the unit.
4. Verify the current PCB version of the NPE water heater.
 For OLD PCB Version KDC-330-5M P12 : The PCB must be replaced with an
updated version. Remove all the cables and connectors from the PCB and
replace with the latest PCB version that is compatible with the ComfortAir
kit. Reconnect all the cables and connectors to the PCB. Proceed to the next
step.
 For NEW PCB Version KDC-330-5M P20 : The existing PCB can be used. Pull
out the PCB from the tray but do NOT disconnect any cables or wires.
Proceed directly to the next step.
5. Install the ComfortAir
the latch at the back of the case with the front lip of the PCB tray.
10 Installing the Device
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onto the NPE-180A/240A water heater's PCB tray. Align
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