Advertisement
Field "Pump operation" can have the following options:
Heating – Working only the circulation pump for central the heating installation. The
•
circulation pump of the heating system is turned on when the temperature of the water in
the boiler reaches the temperature set to the "Pump on" row. The pump runs until the
temperature of the water gets lower than the difference between row "On" and row
"Hysteresis". When the room thermostat activates due to reaching to the set temperature
the pump keeps working, but the burner's power decrease with one power level, with
defined intervals, which are set in menu "Service settings" » "Room thermostat".
Finally the burner goes into power "Suspend". If the room thermostat gets back to its
normal state while the fire is still burning, it will go on to work according to the
temperature of the water in the boiler. If the room thermostat is active for a long time (all
times from "Power decrease" in menu "Service settings" » "Room thermostat" + the
time "Suspend mode" from menu "Service settings" » "Power modulation" has
expired) the burner will be extinguished and flame again after restoring the thermostat and
according the temperature of the water in the boiler is lower the set temperature minus
"Hysteresis flame" from menu "Service settings" » "General settings ".
DHW prior. – the domestic hot water (DHW) boiler is heated with priority. The pump in
•
the boiler installation is turned on when the following conditions are implemented:
▪ The temperature of the water in the boiler is higher then 35
▪ The difference between the boiler's temperature and the water heater's temperature
is more than 5
▪ The temperature of the water in the water heater is lower than the set temperature in
the installation area for DHW row "WH set temp'' minus row "Hysteresis"
After reaching the set temperature, the circulation pump stops and will turn on again, when the
temperature of the water in the water heater become lower than the difference "WH set temp" –
"Hysteresis" from the range for the installation for DHW. To ensure priority of the fast heating of
the water heater while the DHW pump is running, the circulation pump of the heating installation
stops. If there is an active room thermostat from menu "Service settings" » "Equipment", row
"Room thermostat" and if it has work the circulation pump of the heating installation stops. If the
temperature of the water in the water heater is higher then"WH set temp" – "Hysteresis" from
the DHW range the burner will switches to Suspend level. If the room thermostat restore its
function or the temperature of the water heater is low, the burner resumes its normal work and
switches to the required power level according to the boiler's temperature. If the situation does not
change, after the time that is allowed to unfold the fire, the burner will be extinguished. It will turn
on again when the temperature of the water in the boiler is lower then set temperature minus
"Ignition Hysteresis" from menu "Service settings" » "General settings". If there is a room
thermostat, then except for the above conditions either the thermostat must not be activated or the
temperature in the boiler must be lower then the set hysteresis.
• For a normal heat exchange, the boiler's set temperature must be at least 5°C
higher than the water heater's set temperature!
• If the central heating installation works without a room thermostat its pump will
work continuously and unconditionally!
User Manual / ver. 1.2
Electronic pellet burner controller - NPBC-V6T-2
o
C
http://www.naturela-bg.com/en/
o
C
page 27 of 41
Advertisement
