... control meter.3, HT - R390 fluctuation hot air heating, infrared preheating.4, HT - R390 is factory direct, guarantee for ... Upper heating power: 800W3. Bottom heating power: 800W, bottom infrared heating power: 2200W4. Use single-phase 220V power: AC 50 ... team temperature curve.The third temperature area USES far infrared heating board preheat, independent temperature control, ensure the welding process ...