PV20a / PV30a pellet burner
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DK9902A1 www.pelltech.eu
STATUS
menu displays last events (burner states) and their duration. All durations are described in form
mm:ss (’m’ in the middle) or hh:mm (’h’ in the middle). For example IGNITING 01m25 means that the
burner’s ignition state lasted 1minute and 25 seconds. Last row of the log shows current state. All
burner’s statuses are described in Table 8.
INFO
menu displays main burner’s indicators like:
Battery voltage: U=13V64 i.e. 13,64V when feeder motor works
Feeder auger motor’s current: I=2,0 A
Firmware version and date: ver=3.88 31.10.13
Total amount of pellets burnt: Total= kg (reset when firmware upgraded)
Interim amount of pellets burnt: Count= kg (reset from INFO menu press OK > 3 sec)
Selected and max power level : P= 10/20 kW (selected from POWER menu)
Burners temperature: T=23
o
Fan’s speed: F= F=28/38± 2 0/35 rps (28 actual speed of primary fan, 38 set-up speed of primary fan,
± 2 base air value, 0/35 same for secondary fan)
Burning chamber’s pressure: -128,5 Pa ( no used in this models)
Menu
BURNER
enables to turn burner ON or OFF.
The main idea of
HOLD FLAME
function is to reduce burner’s permanent on-off cycles. This function is
useful if burner’s working time is much longer than stand by time. For example 1 hour of working time
and 10 minutes of waiting time. In HOLD FLAME state the fan rotates slowly (PAR10) and small
quantities of fuel are added to burner. Existence of flame is not checked. Such status lasts max one hour,
after what burner ends usual
cycle and stays WAITING. If boiler’s thermostat switches on before one
hour, then burner goes to BURNING to state. If HOLD FLAME is set to AUTO, then it activates when two
stand-by times have been shorter than set in PAR11. HOLD FLAME turns off if flame has been hold more
than set in PAR12.
Menu
PELLETS
enables to select between 3 preset fuel quality options. Depending on fuel quality the
weight of pellets and its caloric value may differ in same volume. Normal weight for pellets is 650..670
g/l (650..670 kg/m
3
). By default burner calculates that one rotation pushes 33 gramms pellets (PAR21) to
burning chamber. If pellets density is smaller i.e they are lighter (less than 600 g/l), then with one
rotation less pellets will be delivered into burning chamber. Such mistake may to be compensated by
selecting LIGHT from PELLETS menu. Now burner calculates that one rotation equals with 31 gramms of
pellets (PAR22) and makes more rotations and delivers more pellets into burning chamber. If pellets are
heavier than normal ( more than 700g/l) HEAVY has to be selected in PELLETS menu. Now burner
calculates that 35 g of pellets is delivered with one rotation to burning chamber and delivers fewer
pellets into burning chamber. In general case there is no need to make changes in PELLETS menu.
Weight of pellets can be manually changed in PAR21..PAR23.
Menu
POWER
determines caloric productivity of burner in kilowatts. Power is calculated by reading the
rotations of the feeder auger, taking into account average caloric value of 1 kg of pellets. It is possible to
preset particular (14; 16; or else) power level value or AUTO - automaticly selected value. In AUTO status
burner selects necesary power level depending on time what is needed to achieve preset temperature.
Burner changes its capasity what is determined by parameters MIN POWER(PAR13) and MAX POWER
(PAR14). If burner cannot achieve preset temperature in certain time (PAR15) it will rise its power
automaticaly by one level and continues rising power up to reaching maksimum level (PAR14) or boiler
has achieved preset temperature.
If boiler achieves preset temperature faster than set in PAR16 burner will work one power level lower in
next cycle. Power will be reduced as long as burner has reached minimal power level (PAR13).
