Navien NCB-150E Service Manual page 51

Item
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 (%)
(F) Space Heating
Max Heat Capacity
This menu is used to configure the circulation pump freeze protection
temperature.
When the space heating supply temperature stays below the set value for
(G) Pump Freeze
longer than 10 seconds, the boiler runs the circulation pump to prevent freeze
Protection
damage (the pump runs for 10 minutes, then stops for 1 minute).
Temperature
Setting
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
(H) Anti Fast
heating supply or return temperatures return to within the set ranges.
Cycling 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
(I) CH Pump Over-
operation temperature range after the set time, the boiler stops the pump for
run Time
10 minutes, runs it again for 5 minutes, and then repeats the cycle.
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 (%)
(J) Domestic Hot
water(DHW) Max
Heat Capacity
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.
(K) DHW Wait Time
50 NCB-E Service Manual
Description
Setting range
50-100%
Setting range
43-50°F(6-10°C)
Setting range
0-20 minutes
Setting range
3-40 minutes
Setting range
50-100 %
Setting range
0-20 minutes
MAX limited calorie for Space
heating is 95%
Default
100%
For Celsius (°C) mode;
ex) at 10°C
For Fahrenheit (°F) mode;
Default ex) at 50°F
50°F(10°C)
If Anti Fast Cycling Time set is
3 minutes
Default
3 minutes
If CH PUMP Over-run Time set is
40 minutes
Default
40 minutes
If Max limited hot water calories
is 100%
Default
100%
If DHW Wait Time set is 5 minutes
Default
5 minutes
Display
Version 1.4