This document describes a burner, including its components, technical specifications, installation, operation, and troubleshooting.
Function Description
The burner is designed to efficiently combust oil, likely for heating or industrial processes. It incorporates various components for oil supply, atomization, ignition, and control. Key functions include:
- Oil Supply and Preheating: A transfer oil pump (1) moves oil from the tank (25) through a filter (31) and into a preheating tank. The oil is heated by a heating tube (21) to achieve optimal viscosity for atomization. The oil temperature is regulated by a temperature control switch (Fig. 1).
- Air Supply and Atomization: An air pump (for STW120 and STW133 models) supplies air, which is regulated by an air controller (2) and an air regulating handle (Fig. 7, 2). The air is mixed with preheated oil at the nozzle (6) to create a fine mist for efficient combustion.
- Ignition: A transformer (9) provides high voltage for ignition, likely through an igniter (not explicitly numbered but implied by "Ignition Adjustion" section).
- Combustion Control: A controller (10, 13) manages the overall operation, including pre-purging, ignition, and monitoring combustion via a photocell (12).
- Safety Features: A limit switch (22) and level switch (23) monitor oil levels and operational parameters to ensure safe operation. A reset button (15) allows for manual reset after a fault.
Important Technical Specifications
The burner comes in several models (STW120, STW133, STW146) with varying capacities and power requirements.
Burner Accessories (Page 2):
- Transfer oil pump: 1PC
- Air controller: 1PC
- Install flange: 1PC
- Asbestos gasket: 1PC
- Outlet-inlet pipe: 2PC
- Install screw: 4
- Inner six angle spanner: 1
- Nozzle Spanner: 1
- Oil filter: 1
- Oil line connector: 4
Technical Data (Page 2):
| Item no. |
Cap. (KW) |
Motor (W) |
Nozzle Qty |
Combustion (KG) |
Transfer Motor (W) |
Power Supply |
| STW120 -P |
10-50 |
130W |
1 |
1-4 |
120W |
230V/50Hz |
| STW120 |
12-50 |
90W |
1 |
1-4 |
120W |
230V/50Hz |
| STW133 -1 |
40-80 |
130W |
1 |
3-7 |
180W |
230V/50Hz |
| STW133 -1P |
40-80 |
180W |
1 |
3-7 |
180W |
230V/50Hz |
| STW133 -2P |
70-115 |
220W |
2 |
6-10 |
180W |
230V/50Hz |
| STW133 -2 |
70-115 |
130W |
2 |
6-10 |
180W |
230V/50Hz |
| STW146 -2 |
70-139 |
150W |
2 |
6-12 |
180W |
230V/50Hz |
| STW146 -2P |
70-139 |
250W |
2 |
6-12 |
180W |
230V/50Hz |
| STW146 -3 |
115-200 |
180W |
3 |
10-18 |
180W |
230V/50Hz |
Overall Dimensions (Page 3, Fig. 2):
| Model |
A |
B |
C |
D |
E |
F |
G |
| STW120 |
338 |
242 |
172 |
78 |
85 |
204 |
89 |
| STW133 |
370 |
268 |
196 |
95 |
105 |
196 |
95 |
| STW146 |
380 |
268 |
196 |
95 |
115 |
196 |
114 |
Flange Dimensions (Page 3, Fig. 3):
| Model |
A |
B |
C |
| STW120 |
120 |
160 |
11 |
| STW133 |
145 |
170 |
11 |
| STW146 |
145 |
170 |
11 |
Ignition Adjustment (Page 5, Fig. 6):
- Ignition electrode gap: 3-3.5 mm
- Ignition electrode height: 2.5-3 mm
Nozzle Data (Combustion Adjustment) (Page 5):
Provides detailed fuel (GPH) and air (CFM) settings for various SN609 series nozzles at 3, 4, and 5 psig air pressure, along with corresponding lift heights (1, 4, 7 inches). This table is crucial for optimizing combustion based on the chosen nozzle and desired output.
Air Pump Structure (Page 4):
- STW120 Air Pump (Fig. 4): Air inlet (34), Pressure regulator (35), Pressure port (36), Air outlet (37), Coupling (39).
- STW133 Air Pump (Fig. 5): Pressure regulator (1), Solenoid (2), Pressure port (3), Air outlet (4), Air inlet (5).
Air Controller (Without Air Pump) (Page 6, Fig. 7):
Fixed base (1), Air regulating handle (2), Pressure gauge (3), Burner connector (6mm) (4), Solenoid valve (5), Air filter (6), Drainage outlet (7), Air inlet connector (8mm) (8).
Transfer Oil Pump (Page 6, Fig. 8):
Oil flow rate adjusting handle (40), Oil outlet (to oil tank) (41), Fixed base (42), Oil inlet connector (43), Oil pump (44).
Usage Features
Installation (Page 7):
- Warning: The storage oil tank must not be higher than the burner.
- Oil Pipe Connections:
- Connect the oil pipe from the burner's oil inlet connector (Fig. 1, 30) to the transfer oil pump's oil outlet (Fig. 8, 41).
- Connect the oil pipe from the transfer oil pump's oil inlet connector (Fig. 8, 43) to the oil filter and then to the storage oil tank.
- Air Connections:
- Connect the air pipe from the burner's compressor air inlet (Fig. 1, 14) to the air controller's burner connector (Fig. 7, 4).
- Connect the air pipe from the air source to the air controller's air inlet connector (Fig. 7, 8).
- Liquid Level Adjustment: Adjust the screw (Fig. 10, 1) to set the upper limit of the liquid level. Release (Fig. 10, 2) to move up or down to adjust the upper or lower limit of the height for the floating ball.
Oil Flow Control (Page 8):
- Adjust handle no. 40 (Fig. 8) on the transfer oil pump to control the inlet oil rate. The goal is to achieve a suitable oil flow rate that just exceeds the burning oil requirement, reducing frequent pump starts and instant cooling of the preheating tank.
Temperature Setting (Page 8):
- Rotate the temperature control switch (Fig. 1) to set the preheat temperature.
- Recommended temperatures:
- Engine oil: 80-90 degrees Celsius
- Vegetable oil: 110-120 degrees Celsius
Air Pressure Setting (Page 8):
- Factory setting: 0.35bar-0.4bar.
- Warning: Too high air pressure can cause ignition difficulties or poor oil atomization.
Work Principle (Page 8):
- Turn on power supply.
- Preheat oil for approximately 5-10 minutes (duration varies with oil type).
- Once the set temperature is reached, turn on the control box.
- Start the burner by pressing Fig. 1-15 (Reset button).
- Sequence of operation:
- Test photocell (dark).
- Pre-purging and ignition (normal working time is 13 seconds).
- Open air valve, injection oil.
- Test photocell (bright).
- During normal combustion, the oil level in the heating tank will rise or drop, controlled by the floating ball, to regulate the transfer oil pump.
Maintenance Features
Troubleshooting (Page 9):
The manual provides a comprehensive guide for diagnosing common issues:
-
Transfer oil pump cannot work:
- Check motor and oil pump for high oil viscosity preventing start.
- Check for oil pump blockage by impurities.
- Check for blockage causing the oil pump connector to slide.
-
Burner stops immediately after starting (fault lamp on), no pre-purge time, direct ignition:
- Check if the air solenoid valve is blocked by sundries, preventing it from closing.
-
Burner stops after pre-purging (fault lamp on):
- Check the photocell; the control box did not detect a dark state.
-
Flame out suddenly after ignition (fault lamp on):
- Photocell damaged.
- Poor oil atomization.
- Air flow is too large.
- Preheating temperature is not sufficient.
-
Transfer oil pump hard to stop:
- Check if the float ball switch has a fault.
Wiring Diagram (Page 10):
The wiring diagram (Fig. 9) illustrates the electrical connections for the burner components, including:
- Nozzle heater (A)
- Temperature controller (B)
- Oil Tank Heater (C)
- Limit temperature controller (D)
- Motor (M)
- Oil Motor (M1)
- Valve (VE)
- Transformer (TA)
- Photoresistance (FR)
- Oil Control (K1, K2)
This diagram is essential for electrical installation, troubleshooting, and maintenance by qualified personnel.
Warning: The air pump is not an oil pump; adding lubricating oil is strictly prohibited (Page 4).
Warning: The overflow pipe (Fig. 1, 28) in the preheating tank must connect back to the storage oil tank (Page 8).
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