1. Installation
1.1 The heater support or base should be fixed on a stable and firm foundation. The horizontal electric heater is installed horizontally. The oil outlet is vertically upward, and a straight pipe section is required before the oil inlet and after the oil outlet, and a bypass pipeline is installed in the process design to meet the needs of electric heater maintenance and seasonal flexible operation. A space equal to the length of the heater should be reserved on the front side of the heater junction box for core-pulling overhaul.
1.2 Before installing the electric heater, use a 1000V shaking meter to check the insulation resistance between the main terminal and the shell, insulation resistance ≥1.5MΩ, marine electric heater insulation resistance ≥10MΩ; and check the body and various components Whether there are obvious defects.
1.3 The temperature control cabinet produced by our factory is generally non-explosion-proof equipment and should be installed outside the explosion-proof area (safe area). Carry out a comprehensive inspection during installation, and connect correctly according to the wiring diagram provided by the factory.
1.4 The selection of cables is carried out in accordance with relevant specifications. The cables must be copper core wires and connected with lugs. Electrical connections in explosion-proof places must meet explosion-proof requirements.
1.5 The electric heater is equipped with a dedicated grounding bolt, and the user reliably connects the grounding wire to the bolt. The grounding wire is a multi-strand copper wire of 4mm2 or more, and the grounding resistance is ≤10Ω.
1.6 After the wiring is completed, the joints of the explosion-proof junction box must be coated with industrial petroleum jelly to ensure that the seal is intact.
2. Trial run
2.1 Check the insulation of the system again before trial operation; check whether the power supply voltage is consistent with the nameplate; recheck whether the electrical connection is correct.
2.2 Set various process temperature constants according to the provisions of the temperature regulator instruction manual.
2.3 The over-temperature protector of the heater has been set according to the explosion-proof temperature, and only needs to be confirmed on site.
2.4 Before the electric heater replaces the air, first open the inlet and outlet pipeline valves, close the bypass valve, and replace it normally for a period of time. After ensuring that the medium is full, the electric heater can manually enter the normal trial operation. (The replacement of special medium needs to be discussed separately)
2.5 If the manual operation is normal, you can switch to the automatic operation state, operate correctly and record the voltage, current, temperature and other relevant data during operation. After the trial operation is 2 hours without abnormal conditions, the equipment can be handed over.
2.6 After the test run is successful, please keep the electric heater well insulated in time.