Navien NCB-180 Service Manual page 57

(3) Operation conditions Settings
1. While in <Special Parameter mode>, press the [+] / [-] button and then press the [Mode] button once when "3. OPR" is displayed
on the front panel.
2. Whenever the [+] / [-] button is pressed, it increases / decreases the operation condition and flashes at intervals of 500msec. If the
condition is not changed for 3 seconds, it works at the displayed operation condition.
a) NORMAL Operation condition → b) 1-Stage MIN → c) DHW 1-Stage MAX →
d) 2-Stage MIN → e) DHW 2- Stage MAX → f) CH 1st Stage MAX →
g) CH 2nd Stage MAX → a) NORMAL Operation condition) ......
3. If the [Reset] button is pressed once, then it returns to the <Special Parameter mode>. (Displayed as the previously entered item "3.
OPR")
4. If there is no button input for 3 hours, then it automatically returns to the <Normal Operation mode>.
Mode
(a) NORMAL Operation condition
(b) 1st Stage MIN Operation
condition
(c) DHW 1st Stage MAX
Operation condition
(d) 2nd Stage MIN Operation
condition
(e) DHW 2nd Stage MAX
Operation condition
(f) CH 1st Stage MAX Operation
condition
(g) CH 2nd Stage MAX Operation
condition
54 NCB Service Manual
Description
Operated in a Normal operation mode
Operated in a 1-Stage MIN operation mode
Operated in a DHW 1-Stage MAX operation mode
Operated in a 2-Stage MIN operation mode
Operated in a DHW 2-Stage MAX operation mode
Operated in a CH 1-Stage MAX operation mode
Operated in a CH 2-Stage MAX operation mode
Display
Version 1.0