Electronic pellet burner controller – NPBC-V3C-1/ NPBC-V4C-1/ NPBC-V4E-1
Display
– Change the brightness of the display, if necessary
Pump Settings
– Settings for the external installations' pumps' work mode and their on/off
temperatures. CH pump is the central heating installation pump, connected to the controller's PH
output. DHW pump is the domestic hot water installation pump, connected to the controller's PWH
output.
Choose between the following options for Pump operation:
•
CH Priority
– only the heating installation works. The circulation pump turns on when the
temperature of the water in the boiler gets equal or higher than the set temperature for the
parameter “Pump On”. The pump turns off if the temperature of the water in the boiler gets
lower than the difference between “Pump On” and “Hysteresis”. (With the settings on the
above screen, the pump will turn off when the temperature of the water in the boiler gets lower
than 60°-5°=55°.) When the room thermostat activates due to reaching its set temperature, the
pump keeps working, but the burner's power decreases with one power level at a time, until it
gets to Suspend. Set the time for the burner to work on each power level after the room
thermostat activates from the menu
Factory Settings → RT Control
. If the room thermostat
gets back to its normal state while the fire is still burning, the burner automatically switches to
the corresponding power level, according to the temperature of the water in the boiler. If the
User Manual / ver 3.11
http://www.naturela-bg.com/en/
page 23 of 37
Settings for the central
heating installation's pump
Settings for the domestic hot
water installation's pump