Version 1.4
50 NCB-E Service Manual
Item
Description
Display
(F) Space Heating
Max Heat Capacity
This menu is used to configure the desired space heating capacity. When the
boiler operates in the Normal mode, the space heating capacity is limited to
the set value (%)
Setting range
Default
50-100%
100%
MAX limited calorie for Space
heating is 95%
(G) Pump Freeze
Protection
Temperature
Setting
This menu is used to configure the circulation pump freeze protection
temperature.
When the space heating supply temperature stays below the set value for
longer than 10 seconds, the boiler runs the circulation pump to prevent freeze
damage (the pump runs for 10 minutes, then stops for 1 minute).
Setting range
Default
43-50°F(6-10°C)
50°F(10°C)
For Celsius (°C) mode;
ex) at 10°C
For Fahrenheit (°F) mode;
ex) at 50°F
(H) Anti Fast
Cycling Time
The anti-fast cycling time is the duration that the boiler stops its space
heating operation when the space heating supply or return temperatures
reach the set values for boiler operation stop temperatures. The boiler will
not resume space heating until the duration elapses, even when the space
heating supply or return temperatures return to within the set ranges.
Setting range
Default
0-20 minutes
3 minutes
If Anti Fast Cycling Time set is
3 minutes
(I) CH Pump Over-
run Time
The pump overrun time is the duration that the circulation pump will
continue to run when the space heating supply or return temperatures reach
the set values for boiler operation stop temperatures and the burner turns off.
If the space heating supply or return temperature remains out of the boiler
operation temperature range after the set time, the boiler stops the pump for
10 minutes, runs it again for 5 minutes, and then repeats the cycle.
Setting range
Default
3-40 minutes
40 minutes
If CH PUMP Over-run Time set is
40 minutes
(J) Domestic Hot
water(DHW) Max
Heat Capacity
This menu is used configure the desired DHW capacity. When the boiler
operates in the Normal mode, the DHW capacity is limited to the set value (%)
Setting range
Default
50-100 %
100%
If Max limited hot water calories
is 100%
(K) DHW Wait Time
The DHW wait time is the duration that the boiler maintains the DHW supply
mode after a DHW demand. With the DHW wait time enabled, a faster DHW
supply may be available when there is a subsequent DHW demand. The boiler
switches the 3-way valve to space heating mode when the set time elapses.
Setting range
Default
0-20 minutes
5 minutes
If DHW Wait Time set is 5 minutes
