Navien NHB-055, Service Manual

Page: 55 / 147

NHB Service Manual 55 Version 1.0
Item Description Display
(W) Setting of DHW
Mode – Boiler
Pump
Setting of Boiler Pump On / Off at DHW Mode
Setting range Default
ON / OFF OFF
In case of Boiler Pump Off
In case of Boiler Pump On
(X) Setting of DHW
Mode – System
Pump
Setting of System Pump On / Off at DHW Mode
Setting range Default
ON / OFF OFF
In case of System Pump Off
In case of System Pump On
(Y) Setting of CH
Mode – DHW
Pump
Setting of DHW Pump On / Off at DHW Mode during heating in case of
simultaneous request of heating and warm water.
Setting range Default
ON / OFF OFF
In case of DHW Pump Off
In case of DHW Pump On
(Z) Setting of heat
exchanger
protection level
Setting of heat exchanger protection level.
Setting range Default
0 ~ 4 4
In case of heat exchanger
protection function being 0.
(1) Low Burning Time
Setting of low load burning time at the time of initial heating
Setting range Default
1 ~ 20 min 1 min
Low Burning Time 15 minutes
(2) Burning
Acceleration Time
Setting of rising time to CH Max calorie at the time of initial heating.
Setting range Default
1 ~ 20 min 3 min
Burning Acceleration Time 10
minutes