PV700a / PV1000a pellet burners
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3.5 Ash removal system
The burner can control external ash removal auger and scraper motors via X25 connector. During
burner’s cleaning cycle the X25 connector is powered and ash removal and scraper motors can be
switched on via X25 connector’s L1 and L2.
3.6 External boiler temperature sensor
External temperature sensor enables the burner to maintain constant boiler’s water temperature. For
that external temperature sensor has to be installed to relevant place on boiler, existing burner’s
temperature sensor to be disconnected from TMP1 connector on controller’s board and external sensor
to be connected to connector TMP1. In parameters menu PAR53 value has to be chosen “2”.
When temperature holding status is activated, then burner will change its capacity according to water
temperature and speed of temperature changing. Burner starts to change its capacity when BURNING
status has lasted longer than set in PAR15. Capacity is changed after time set in PAR17.
Following actions must be done to enable temperature hold mode (THM):
1.
Mount external temperature sensor to boiler according to boiler manufacturer instructions.
2.
Connect the sensor to TMP1 connector on controller board.
3.
Choose PAR53 value (sensor type) according to Table 7.
4.
Set requested temperature – PAR54. It should be lower than boiler thermostat temperature.
Otherwise the boiler thermostat would force the burner to turn off before reaching PAR54 value.
5.
Optionally PAR55 - the hysteresis of requested temperature can be changed.
THM activates if PAR53 value is larger than “1” and BURNING status has lasted longer than set in PAR15
typically 30min). The burner will change its output power according to current measured temperature
and the rate of temperature change. New power level is selected after every time interval specified in
PAR17.
Table 7 PAR53 values
PAR53 Sensor type
Temp min
Temp max
Function
0
No sensor
-
-
-
1
0..2.5V
0ºC (0.5V)
125ºC (1.75V)
Burner’s actual internal over temperature
sensor. Overheat value to be set PAR43.
2
0..2.5V
0ºC (0.5V)
125ºC (1.75V)
Boiler temperature control with external sensor.
After activating THM, following row is displayed on INFO-screen e.g.: „T=22.3/70±5↓200
o
“. It means
following:
22.3 – Actual measured temperature.
70 – Set point temperature (PAR54).
±5 – Set- point hysteresis (PAR55).
↓ - Shows weather actual temperature is increasing or decreasing.
200
o
– Forecasted temperature in 10min.
