Navien NCB-24LSWE, Руководство по обслуживанию, Страница: 23 / 144

NCB Service Manual 21
Version 1.0
4.1.2 Front Panel DIP Switches
Setting the Front Panel DIP Switches
The DIP switch on the front panel configures the fuel
selection, source of the heat demand, and the temperature
control standard.
Switc
Function Setting
1 & 2
Fuel
selection
G20 (LNG) 1-OFF, 2-OFF
G25, G27(LNG) 1-OFF, 2-ON
G30 (LPG) 1-ON, 2-OFF
G31 (LPG) 1-ON, 2-ON
4 & 5
Heat
demand
Panel 2-OFF, 3-OFF
OpenTherm
Remote Control
2-ON, 3-OFF
Thermostat 2-OFF, 3-ON
Panel 4-ON, 5-ON
6
Temperatu
re control
standard
Supply Water 1-OFF
Return Water 1-ON
4.2 Measuring the Incoming Gas
Pressure
WARNING
The boiler does not function
correctly if there is insufficient
incoming gas pressure. Measuring
the inlet gas pressure should be
performed by a registered technician
only.
* The incoming gas pressure must be between 17 mbar and 25
mbar for natural gas and between 25 mbar and 35 mbar for
liquefied propane.
To measure the incoming gas pressure:
1. Shut off the manual gas valve on the gas supply line.
2. Open a hot water tap. The boiler should turn on and
the gas in the gas supply line will be purged.
3. Leave the faucet on until the boiler shuts down due
to the absence of gas, and then turn off the hot
water tap.