Issues to note during maintenance of explosion-proof electric heater after sale
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1. Explosion-proof electric heater should not be disassembled arbitrarily; during disassembly and maintenance, the explosion-proof surface of parts should not be used as a fulcrum for pry bars, and it is even more forbidden to strike or impact the explosion-proof surface.
2. When disassembling the electric heater, first remove the air cover and fan, then use a socket wrench to remove the bolts of the end cover and bearing cover, then use a round wooden rod or copper rod to axially strike the shaft extension to separate the end cover from the frame, and finally remove the rotor. When removing parts, the explosion-proof surface should be placed facing upward and covered with rubber or cloth pads. Be careful not to lose fastening bolts, spring washers, etc.
3. During varnishing and assembly, the insulating varnish or dirt attached to the explosion-proof surface should be cleaned thoroughly. Do not scrape with hard objects such as iron sheets, but uneven areas can be ground with an oilstone.
4. If the explosion-proof surface is damaged, it must be repaired by welding with lead-tin solder HISnPb58-2, flux of 30% hydrochloric acid (for steel parts) or tin-zinc solder containing 58~60% tin, flux of 30% ammonium chloride, 70% zinc chloride, mixed with 100~150% water (for cast iron parts). The solder must be firmly bonded to the parts, and the raised parts must be ground flat to achieve the specified smoothness.
5. To prevent rust on the explosion-proof surface, apply machine oil or 204-1 replacement anti-rust oil on the explosion-proof surface.
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