Wuhan Questt Asia Technology CO.,LTDWuhan Questt Asia Technology Co., Ltd Address: A7-101, Hangyu building, Wuhan University Sci & Tech Park, EastLake High-tech Dev. Zone, Wuhan, Hubei, ChinaTel: 00862787611146 Fax: 00862759908808 Http://www.questt.com.cn; Email:info@questt.com.cn13German Technology | Made in ChinaC. Connect the chiller power:coffee wire=Live wire, blue wire=Null wire,yellow wire=Earth wire,Connect the welder power:red wire=Live wire, blue wire=Null wire, black wire=Earth wireD. Connect the Foot SwitchE. Fulfill the chiller tank with drinking water until the water surface covers all the pipes3.2 Laser Activation