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

6. 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.

6.1 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
Switch Function Setting
Normal Operation
24/28/34
LSWE
40LSWE
Operation 24/28/34
1 & 2
Status LSWE
40LSWE
24/28/34
LSWE
40LSWE
24LSWE
28LSWE
3 & 4 Capacity
34LSWE
40LSWE
Bekaert
Burner
5
Type
Alantum
6 & 7 Country Europe
36 Setting the DIP Switches
1 2 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-ON
5-OFF
6-OFF, 7-OFF

6.2 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
Heat
Remote Control
4 & 5
Demand
Thermostat
Panel
Temperature Supply Water
6 Control
Return Water
Standard
4 5 6 7 8
1-OFF, 2-OFF
1-OFF, 2-ON
1-ON, 2-OFF
1-ON, 2-ON
2-OFF, 3-OFF
2-ON, 3-OFF
2-OFF, 3-ON
4-ON, 5-ON
1-OFF
1-ON