Navien NCB-24LSWE, Service Manual

Page: 52 / 144

50 NCB Service Manual Version 1.0
Item Description Display
(N) CH burner
OFF temp
During heating, the boiler turns off the burner when the supply
temperature meets or exceeds the burner OFF temperature.
Range Default
0 to 30
℃
2
℃
Eg.) at 2
℃
(O) CH burner
ON temp
During heating, the boiler turns on the burner when the supply
temperature is below the burner ON temperature.
Range Default
1-30
℃
3
℃
Eg.) at 6
℃
(P) Supply
absolute
MAX set
point
This menu changes the maximum supply temperature range when
Supply Control mode is used. When configuring Custom mode in
Outdoor Reset Control mode, the supply temperature changes based on
the supply absolute MAX temperature range.
Range Default
(Minimum set point + 20
℃
) to 90
℃
90
℃
Eg.) at 82
℃
(in Supply
control mode)
(Q) Supply
absolute
MIN set
point
This menu changes the minimum supply temperature range when
Supply Control mode is used. When configuring Custom mode in
Outdoor Reset Control mode, the supply temperature changes based on
the supply absolute MIN temperature range.
Range Default
25
℃
to (Maximum point - 20
℃
) 40
℃
Eg.) at 40
℃
(R) Return
absolute
MAX set
point
This menu changes the maximum return temperature range when the
Return Control mode is used. When configuring Custom mode in
Outdoor Reset Control mode, the return temperature changes based on
the return absolute MAX temperature range.
Range Default
(Minimum set point + 10
℃
] to 70
℃
65
℃
Eg.) at 65
℃
(S) Return
absolute
MIN set
point
This menu changes the maximum return temperature range when the
Return Control mode is used. When configuring Custom mode in
Outdoor Reset Control mode, the return temperature changes based on
the return absolute MIN temperature range.
Range Default
20
℃
to (Maximum set point - 10
℃
) 30
℃
Eg.) at 30
℃