50 NCB Service Manual
Version 1.0
Item
Description
Display
(L) CH Burning OFF
Differential
During space heating, the boiler turns off the burner when the space
heating supply temperature meets or exceeds the burner-off temperature.
Setting range
Default
0-54
℉
(0-30
℃
)
0
℉
(0
℃
)
For Celsius (
℃
) mode; ex)
at 0
℃
For Fahrenheit (
℉
) mode;
ex) at 0
℉
(M) CH Burning ON
Differential
During space heating, the boiler turns on the burner when the space
heating supply temperature is below the burner-on temperature.
Setting range
Default
5-54
℉
(3-30
℃
)
5
℉
(3
℃
)
For Celsius (
℃
) mode; ex)
at 6
℃
For Fahrenheit (
℉
) mode;
ex) at 10
℉
(N) Supply
Absolute MAX
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
supply temperature changes based on the supply absolute MAX
temperature range.
Setting range
Default
[MIN Set-point + 36
℉
(20
℃
)] ~ 194
℉
(90
℃
)
180
℉
(82
℃
)
For Celsius (
℃
) mode; ex)
at 82
℃
(feed water
control)
For Fahrenheit (
℉
) mode;
ex) at 180
℉
(O) Supply
Absolute MIN
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
supply temperature changes based on the supply absolute MIN
temperature range.
Setting range
Default
77
℉
(25
℃
) ~ [MAX Set-point - 36
℉
(20
℃
)]
104
℉
(40
℃
)
For Celsius (
℃
) mode; ex)
at 40
℃
For Fahrenheit (
℉
) mode;
ex) at 104
℉
(P) Return
Absolute MAX
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
range.
Setting range
Default
[MIN Set-point + 18
℉
(10
℃
)] ~ 158
℉
(70
℃
)
149
℉
(65
℃
)
For Celsius (
℃
) mode; ex)
at 65
℃
For Fahrenheit (
℉
) mode;
ex) at 149
℉
Summary of Contents for NCB-180
Page 3: ......
Page 16: ......
Page 135: ...132 NCB Service Manual Version 1 0 7 2 Burner Assembly...
Page 139: ...136 NCB Service Manual Version 1 0 7 4 Fan Gas Assembly...
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