Navien NCB-20LHWE, Installation & Operation Manual

Page: 47 / 80

Display Description
External DHW tank temperature
not in use (with cylinder stat)
Cold water inlet temperature
not in use
Not in use (with cylinder temp.
sensor)
DHW operation mode (with
cylinder stat)
Outdoor air temperature (°C)
(with optional Outdoor
Temperature Sensor only)
Outdoor reset curve
-: Not in use.
1: Finned tube baseboard
2: FAN coil
3: Cast iron baseboard
4: Low mass radiant
5: High mass radiant
6: Radiator
7: Custom (set by installer)
Boost interval time (set by
installer)
Space heating water pressure
in Bar
To exit information mode, press the Reset button.
11.4 Setting the Operation Mode
1. Using the Front Panel, press and hold the ECO, Summer/
Winter and Space heating button at the same time for over
5 seconds until “1.TST” is displayed.
2. Press the + (Up) or – (Down) buttons until “2.OPR” is
displayed.
3. Press the INFO Button once to access the Operation mode
menu.
4. Press the + (Up) or – (Down) buttons to switch between the
Operation mode types.
5. To exit the Operation Mode setting and return the boiler to
normal operation, press the Reset button.
47 Operating the Boiler