Csa Approval Constant Temperature Water Heater Control Board Bw-hk002r - Baiwei ( China ) - Offers to Sell and Export - Monday 13 December 2021 2:38 am - csa approval constant temperature water heater control board bw hk002r gas water heater control board function description 1 it works with a display 2 it works with a ventilator 3 it works with a on off valve a...