Setting The Dip Switches; Pcb Dip Switches; Front Panel Dip Switches - Navien NCB-24LDWE Installation & Operation Manual

7. Setting the DIP Switches

CAUTION
Do not remove the front cover unless the power to the
boiler is turned off or disconnected. Failure to do so may
result in electric shock.
The boiler has 2 sets of DIP switches on the main circuit board
(PCB) and 2 sets of DIP switches on the front panel. DIP switches
are used to control the functionality of the boiler. Set the DIP
switches appropriately, based on the installation environment.

7.1 PCB DIP Switches

Dip Switch (Set of 8)
The DIP SW 1 on the circuit board configures operation status,
boiler model/capacity, burner type, and country.
ON
1 2
Switch Function Setting
Normal Operation
24/28/34
LDWE
40LDWE
Operation 24/28/34
1 & 2
Status LDWE
40LDWE
24/28/34
LDWE
40LDWE
24LDWE
28LDWE
3 & 4 Capacity
34LDWE
40LDWE
Burner
5 Bekaert
Type
6 & 7 Country Europe
Combi
Boiler
8
Type
System
3 4 5 6 7 8
1-OFF, 2-OFF
DHW MAX
1-ON, 2-OFF
DHW 2-stage
MAX
MIN
1-OFF, 2-ON
1-stage MIN
Heating MAX
1-ON, 2-ON
Heating 2-stage
MAX
3-OFF, 4-OFF
3-ON, 4-OFF
3-OFF, 4-ON
3-ON, 4-ON
5-OFF
6-OFF, 7-OFF
8-OFF
8-ON

7.2 Front Panel DIP Switches

Dip Switch (Set of 8)
The DIP SW on the front panel configures the fuel selection,
source of the heat demand, and temperature control standard.
1 2 3
O
N
Switch Function Setting
G20 (LNG)
G25, G27(LNG)
Fuel
1 & 2
Selection
G30 (LPG)
G31 (LPG)
Panel
OpenTherm
Remote Control
Heat
4 & 5
Room Stat
Demand
230 VAC Room
Stat (System boiler
only)
Temperature Supply Water
6 Control
Return Water
Standard
8
4 5 6 7
1-OFF, 2-OFF
1-OFF, 2-ON
1-ON, 2-OFF
1-ON, 2-ON
4-OFF, 5-OFF
4-ON, 5-OFF
4-OFF, 5-ON
4-ON, 5-ON
6-OFF
6-ON
Setting the DIP Switches 35