Setting The Operation Mode - Navien NHB-055 Installation & Operation Manual

Display
DHW pump status
S R O/R psi
Overheating sensing (HTL) status
S R O/R
psi
Dual venturi status
S R O/R psi
Low water cut-off (LWCO) status
S R O/R psi
Air handler interface output
S
R O/R psi
DHW priority status
S R O/R psi
To exit service information mode, press the Reset button.
Description

11.5 Setting the Operation Mode

1. On the Front Panel, press and hold the Diagnostics Button for
over 5 seconds until "1.PAR" is displayed.
2. Press the + (Up) button two times to change the display to
"3.OPR".
3. Press the Mode button once to access the Operation Mode
menu.
4. To set the boiler to operate at 1-stage MIN, press the + (Up)
button until "MIN1" is displayed.
5. To set the boiler to operate at 2-stage MAX, press the + (Up)
button until "MAX2" is displayed.
6. To exit the Operation mode setting and return the boiler to
normal operation, press the Reset button twice.
MODE O O
Operating the Boiler 77