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airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8134
Experience:  Furnace, A/C and heat pump specialist.
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How do I drain a smart 50 water heater

Customer Question

How do I drain a smart 50 water heater
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.
To drain outer tank, follow these instructions:1. Disconnect power supply to water heater. 2. Close boiler water isolation valves between boiler and water heater. 3. Connect hose to boiler water drain valve at water heater. Open and drain water to a safe place. 4. To speed draining procedure, loosen air vent on top of tank. 5. When draining is complete, close drain valve and retighten air vent. To drain inner tank follow these instructions:1. Disconnect power supply to water heater. - If outer (boiler water) tank pressure is greater than 15 psig, relieve boiler pressure and close isolation valves before proceeding.2. Close system supply isolation valve. 3. Connect a hose to domestic water drain valve at cold water inlet. Hose should extend to drain at floor level to allow siphoning of domestic water tank. 4. Open hot water faucet at highest point above heater. 5. Open domestic water drain valve to start siphoning. 6. When draining is complete, close hot water faucet and domestic water drain valve.