Figure 3 Burner Operation

Press the "Big Fire" button, and the burner will operate in a high fire state;

Press the "low fire" button, and the burner will work in a low fire state;

Press the 'Close' button to turn off the burner;

Press the 'Exit' button to return to the main screen.

2.3 Control and manual operation of feedwater pump

2.3.1 Automatic control of feedwater pump

In automatic mode, the controller determines the status of the boiler water level by detecting the water electrode signal, and controls the start and stop of the feedwater pump based on this status.

When the water level is lower than the low water level electrode, the controller starts the feedwater pump; When the water level is higher than the high water level electrode, the controller shuts down the feedwater pump.

2.3.2 Manual operation of feedwater pump

On the main screen, press the feed water pump to enter the "Feed Water Pump Operation" screen. As shown in Figure 4.

Figure 5 Operation of Condensation Circulating Pump

Press the "Start" button, and the controller will start the condensate circulation pump while being set to manual mode.

Figure 6 Parameter Setting Screen

Press "Overtemperature Alarm Settings" to enter the overtemperature alarm settings screen.

Press' Communication Parameter Settings' to enter the communication parameter settings screen.

3.1.1 Overtemperature alarm setting

In the parameter setting screen, press the "Overtemperature Alarm Setting" button to enter the overtemperature alarm setting screen, as shown in Figure 7.

Figure 7 Overtemperature Alarm Setting Screen

Overpressure alarm: 0.20-2.50MPa. When the steam pressure reaches this set value, an alarm is triggered and the furnace is shut down.
Upper limit pressure: 0.10-2.50 MPa.

Delay setting: 1-30 minutes. Delay after condensing circulation pump.

3.2 Fault Records

Press the "Fault Record" button in the menu to enter the fault record screen. As shown in Figure 8.

Figure 8 Fault Record

Press' Previous' or 'Next' to switch the number of pages for fault record information.

3.3 Accumulated combustion

Press the "Combustion Accumulation" button in the menu to enter the combustion accumulation screen. As shown in Figure 9.

7、 Wiring method

7.1 Input

7.1.1 Transmitter

The steam pressure adopts a pressure transmitter and a 4-20mA current signal; Range: 0~2.50Mpa range can be set.

7.1.2 Temperature Sensor

The exhaust temperature sensor uses a thermistor. Thermal resistance index: Pt100, R (0)=100.00 Ω. Smoke exhaust temperature measurement range: 0-400 ℃.

The resistance change of the temperature sensor is only about 0.39 Ω for every 1 ℃ temperature change, so special attention should be paid to the wiring quality and the contact resistance at the wire joints should be minimized as much as possible to avoid affecting the temperature measurement accuracy. The temperature sensor adopts a three wire connection method to eliminate the influence of line resistance. The specifications and lengths of the three wires should be exactly the same, and the B and C ends should be short circuited on one side of the temperature sensor.

7.1.3 Water level electrode (water level electrical contact)

When the resistance at both ends of the water electrode is below 50K, the controller considers the water surface to be higher than the electrode. When the resistance at both ends of the water electrode rises above 200K, the controller considers the water surface to be lower than the electrode. Please pay attention to the insulation at both ends of the electrode.