AO Smith BTH 業務用高効率給湯器 取扱説明書
A O Smith BTH Commercial High Efficiency Water Heater Specifications Product: Water Heaters Type: Single Temperature with Building Recirculation Components: Temperature & Pressure Relief Valve, Circulating Pump, Tank Temperature Control, Drain Valve, Shut-Off Valve, Full-Port Ball Valve, Check Valve, Temperature…