Navien NPE-180A2 Installation Manual page 105

Item
10. Cascade Unit OFF HC
Offset
11. Cascade Protocol
3. Press the Back button (
previous screen or menu.
7.5.3 Diagnosing the Water Heater
System
1. Press and hold the Menu button (
Back button ( ) simultaneously for 3 seconds,
and then select 3. Test Mode.
2. Press the Up button (
( ) to switch between the test procedures.
Press the OK button (
or to run a test procedure.
Description
Set the heating capacity
compensation standard
when the cascade
combustion is OFF.
Setting range: –5% - +5%
●
Default: 0%
●
Set the cascade protocol.
Setting range: NPE, NR
●
Default: NPE
●
) to return to the
) and the
) or the Down button
) to select a parameter
Item
1. Fan Motor
2. Water Flow Adjust
Valve
3. Dual Venturi
4. Pump (A2-Type)
Ext.Pump (S2-Type)
5. Mixing Valve (S2-Type
Only)
3. Press the Back button (
previous screen or menu.
Description
This procedure slowly
increase RPM of the fan
motor from 0 to the
maximum and then
decreases it to 0, and then
repeats the same sequence.
This procedure turns the
valve to a fully open position
and then to a full close
position over approximately
12 seconds. A value between
0 - 100% will appear on the
front panel.
Check the feedback during
●
the procedure.
When the procedure
●
is complete, the valve
returns to the latest status.
The dual venturi is turned
on as soon as you access the
menu and switches between
the on and off status as you
press the Up button ( ) or
the Down button ( ).
Set to repeat the sequence
that runs the pump for
10 seconds and stops for
5 seconds 5 times for 75
seconds.
This procedure turns the
valve to a fully open position
and then to a fully closed
position over approximately
10 seconds. A value between
0 - 56% will appear on the
front panel.
Check the feedback during
●
the procedure.
Available on S2-type
●
models only.
) to return to the
Operating the Water Heater 105