Standardized Installation Process Guide for Precision Hot Air Circulation Ovens

Precision Hot Air Circulation Oven Standardized Installation Guide

I. Pre-Installation Preparation

Site Selection

Ensure a dry, well-ventilated environment. Keep away from flammable, explosive, and corrosive materials, and avoid direct sunlight or high-temperature, humid areas.

Allow ample operating space. Keep debris within 2 meters of the oven to facilitate maintenance and heat dissipation.

The floor must be level. If tilted, use adjustable shims to correct the levelness of the oven to within 0.1°.

Power Supply and Grounding
Select the power supply based on the equipment power:

Electric Heating Model: AC 380V/50Hz three-phase power. A 3-pin socket with a power rating of 10A or higher is required. Ensure the ground wire is effectively grounded.

Steam Heating Model: A stainless steel steam pipe is required. The pipe diameter should be selected based on the model (e.g., 1-inch for CT-C Series III).

Using a 2-pin socket or modifying the power cord without authorization is strictly prohibited to avoid the risk of electrical leakage.

Equipment Inspection

Check the equipment list to ensure that all components, including the oven body, fan, heater, and temperature control instrument, are present.

Confirm that there is no damage during transportation, especially to vulnerable parts such as the glass window and sensors.

II. Precision Hot Air Circulation Oven Installation Steps

Main Unit Positioning

Use a forklift or lifting equipment to place the oven in the designated position steadily, avoiding tilting or impact.

Adjust the adjustable shims to ensure the oven is level, and verify using a spirit level.

Pipe and Line Connections

Steam Heating Model: Connect the stainless steel steam pipe, ensuring a tight seal to prevent leakage.

Electric Heating Model: Connect the wires according to the electrical schematic, confirming that the power phase sequence and fan direction of rotation are consistent (the arrow on the fan indicates the direction of rotation).

Install the moisture evacuation duct, ensuring unobstructed airflow and keeping the moisture evacuation outlet away from the operating area.

Component Installation

Install the Shelves: Adjust the shelf spacing according to the size of the specimen to ensure even distribution and avoid local overloading (single-layer load ≤ 20 kg).

Secure the Sensor: Install the temperature probe in the center of the chamber, avoiding contact with the specimen to prevent temperature measurement errors.

Install the Observation Window: Ensure the glass is properly sealed to prevent heat leakage.

Grounding and Insulation Test

Use a megohmmeter to check the resistance between the oven's metal casing and the ground wire, ensuring the ground resistance is ≤4Ω.

Check the insulation of the electrical circuits to prevent short circuits or leakage.

III. Post-Installation Commissioning

No-Load Trial Run

Turn on the power switch and observe whether the fan, heater, and indicator lights start normally.

Check whether the fan rotation direction is correct. If reversed, adjust the power phase sequence.

Set the temperature controller parameters (e.g., PV for display temperature, SV for set temperature), start the heating function, and observe whether the temperature rises smoothly.

Temperature Uniformity Calibration

Without load, heat the oven to the set temperature (e.g., 80°C). Use a multi-point thermometer to measure the temperature at various points in the working chamber.

Adjust the air guide vane opening to eliminate temperature deviation (the deviation should be ≤±2°C).

Record the calibration data and create a temperature distribution diagram for future reference.

Safety Function Verification

Test the over-temperature alarm function: Set the alarm temperature (e.g., set temperature + 10°C) and observe whether the alarm responds promptly.

Verify the dehumidification function: Start the dehumidification fan and check for sufficient airflow at the dehumidification outlet.

Check the emergency stop button: Press the emergency stop button to confirm that all functions stop immediately.

IV. Key Precautions for Precision Hot Air Circulation Ovens

Operating Specifications

Do not bake flammable, explosive, or volatile items to prevent explosions.

Avoid placing test items too close together to ensure hot air circulation. Keep the spacing between items at least 10 mm.

Handle test items gently when placing them in and out, avoiding impact with sensors or shelves.

Maintenance

Clean the oven surface and workspace daily to prevent the adhesion of corrosive substances.

Regularly inspect components such as the fan, heater, and sensor, and replace any aging components promptly.

Calibrate the temperature control instrument every six months to ensure accurate temperature display.

Troubleshooting

If the heating indicator light does not illuminate, check for damage to the bulb, contactor, or heater wire.

If the temperature is out of control, check for a malfunction in the temperature sensor or temperature controller.

If the fan is noisy, check the bearings or impeller for wear.