1. Installation:
1.1 Reserve a space equal to the length of the heater on the front side of the gas electric heater junction box for core-pulling overhaul.
1.2 Before installation, use a 1000V shake meter to check the insulation resistance between the main terminal and the shell, insulation resistance ≥1.5MΩ, marine electric heater insulation ≥10MΩ; and check the body and each component for obvious Defect phenomenon.
1.3 During the hoisting process of the gas electric heater, the gas electric heater should be lifted and placed gently. Do not collide or fall. When laying it flat, use a skid pad on the shell. The junction box is not allowed to be stressed on the ground, and the safety valve port faces upwards. Place, the support or base is fixed on a stable and firm foundation.
1.4 The gas electric heater has been pressure tested before leaving the factory, and no parts are allowed to be disassembled without permission, and no bolts are allowed to loosen at will.
1.5 After the gas electric heater is installed and fixed, check whether the heat transfer oil added in the heating chamber is level (10Kg/barrel heat transfer oil is provided with the machine, and the commissioning service personnel of our company are responsible for guiding the first refueling.), the expansion tank is explosion-proof The plug is used to breathe the gas in the expansion box and keep the pressure in the box stable. Our company personnel have adjusted and tightened it before leaving the factory. The installer should carefully check the explosion-proof plug. No one is allowed to loosen or tighten at will during operation.
1.6 The selection of cables is carried out in accordance with relevant design specifications. The cables must be copper core wires and be firmly connected with terminal lugs.
1.7 The electric heating control cabinet produced by our factory is non-explosion-proof equipment, and should be installed outside the explosion-proof area (safe area), and conduct a comprehensive inspection during installation, and wire it correctly according to the wiring diagram provided by the factory. Set various process temperature constants according to the provisions of the temperature regulator instruction manual. Lock after setting.
1.8 The symbols on the outside of the gas electric heater base and the junction box are external grounding parts. Use 6mm2 or more stranded copper wire to ground firmly, and the grounding resistance is ≤10Ω. The electrical connection of the explosion-proof place must meet the explosion-proof requirements. After the wiring is completed, use the explosion-proof glue to seal the wire inlet from the inside of the junction box, and apply industrial petroleum jelly to the joints of the junction box.
1.9 When the on-site pressure test is performed after the heater is installed, the company’s personnel must be present, and the test pressure shall not exceed 1.25 times the working pressure on the product nameplate.
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 Before the medium replaces the air, the gas electric heater opens the air outlet and closes the air inlet. (At this time, there is no combustible gas in the gas electric heater). The heater is manually powered on for 20 seconds, and the temperature of the heat exchange tube rises. Check whether the two-stage temperature display function is reliable.
2.3 Before putting into operation, it must be replaced strictly in accordance with the flammable gas replacement specification. The main power supply of the gas electric heater must be disconnected before the replacement operation.
2.4 When the gas electric heater replaces air, first open the inlet and outlet pipeline valves, close the bypass valve, and replace it normally for a period of time to ensure that the combustible medium is full and reaches the specified flow before the electric heater can manually enter the normal trial operation.
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 2 hours of automatic trial operation, there is no abnormal situation before the equipment handover can be arranged.
2.6 After the trial operation, if the process design requires it, the body insulation should be done in time.
3. Run
3.1 Operation and use by non-professional staff is strictly prohibited.
3.2 Regular inspections of equipment and circuits are carried out to strengthen maintenance. In particular, attention should be paid to checking electrical contacts, terminals, connectors, etc. for false connections and overheating. After opening and checking, restore the original state in time.
3.3 The electrical parameters are regularly checked and checked every year.
3.4 Before running in winter every year, replenish the heat transfer oil to the highest level. After two years of use, 500mml heat-conducting oil should be discharged from the bottom oil drain every year for testing. If the physicochemical index of the heat-conducting oil is found to exceed the regulations, it should be replaced in time (refer to the heat-conducting oil manual).
3.5 Calibrate temperature measurement sensors and temperature adjustment instruments every year in accordance with the requirements of the quality assurance system to ensure the accuracy of the measurement values.
3.6 When disabling and reactivating for a long time or relocating the place of use, the contents of items 1 and 2 shall be re-executed strictly.
