Drain Back Solar Water Heater System

A storage tank to hold the end use water being heated.

Drain back solar water heater system.

Drain back tanks are ideal when designing solar thermal systems especially in climates that exhibit very hot or cold temperatures. One or more solar hot water collectors. Once the system is filled a differential controller operates a pump to move water from the tank through the collectors. Regardless of what the heat is being used for the basic components of a drainback system are.

Indirect active closed loop drainback systems are an excellent choice for heating water unless you receive a lot of snow and have really cold temperatures. A draindown system not to be confused with drainback is an open loop water heated by the collector goes to the hot water faucet system in which the collectors are filled with domestic water under house pressure when there is no danger of freezing. The superstor solar drain back tank is designed to stabilize and protect solar thermal systems. They re the best choice in hot climates although they re more expensive to install than ics.

Understanding solar hot water systems the drain back design there are many types of solar hot water systems pressurized closed loop pressurized open loop drain back thermosyphon and variations called direct and indirect referring to the placement of the heat exchanger. A drainback system lets you use solar power to heat water for your home. A differential controller which monitors the water temperature. Drainback systems are also common in warm climates because they drainback when the system has met a maximum set temperature in the storage tank.

Choose an active drainback solar thermal system if you need to protect the heat transfer fluid from outdoor freezing temperatures by draining the fluid into conditioned space. Drain down solar hot water systems. A drain back tank allows all the water from solar collectors and related piping connections to drain into the tank reservoir protecting the system from both freezing and overheating. This could be a domestic hot water tank a.