Navien NCB-180 Service Manual page 53

Item
During space heating, the boiler turns off the burner when the space
heating supply temperature meets or exceeds the burner-off temperature.
(L) CH Burning OFF
Differential
During space heating, the boiler turns on the burner when the space
heating supply temperature is below the burner-on temperature.
(M) CH Burning ON
Differential
This menu may be used to make changes to the maximum supply
temperature range when the Supply Control mode is in use. When
configuring the Custom mode in the Outdoor Reset Control mode, the
supply temperature changes based on the supply absolute MAX
(N) Supply
Absolute MAX temperature range.
Set-point
This menu may be used to make changes to the maximum supply
temperature range when the Supply Control mode is in use. When
configuring the Custom mode in the Outdoor Reset Control mode, the
(O) Supply supply temperature changes based on the supply absolute MIN
Absolute MIN temperature range.
Set-point
This menu may be used to make changes to the maximum return
temperature range the Return Control mode is in use. When configuring
the Custom mode in the Outdoor Reset Control mode, the return
temperature changes based on the return absolute MAX temperature
(P) Return
range.
Absolute MAX
Set-point
50 NCB Service Manual
Description
Setting range
0-54℉(0-30℃)
Setting range
5-54℉(3-30℃)
Setting range
[MIN Set-point + 36℉(20℃)] ~ 194℉(90℃)
Setting range
77℉(25℃) ~ [MAX Set-point - 36℉(20℃)]
Setting range
[MIN Set-point + 18℉(10℃)] ~ 158℉(70℃)
For Celsius (℃) mode; ex)
at 0℃
Default
For Fahrenheit (℉) mode;
ex) at 0℉
0℉(0℃)
For Celsius (℃) mode; ex)
at 6℃
Default
For Fahrenheit (℉) mode;
ex) at 10℉
5℉(3℃)
For Celsius (℃) mode; ex)
at 82℃ (feed water
control)
For Fahrenheit (℉) mode;
Default
ex) at 180℉
180℉(82℃)
For Celsius (℃) mode; ex)
at 40℃
For Fahrenheit (℉) mode;
Default
ex) at 104℉
104℉(40℃)
For Celsius (℃) mode; ex)
at 65℃
For Fahrenheit (℉) mode;
Default
ex) at 149℉
149℉(65℃)
Display
Version 1.0