Solar Water Heating Drain Back System

The way our solar water heater is designed it can be mounted 90 degrees so the water will drain naturally out of the copper tubes.

Solar water heating drain back system.

A drain back solar system is a non pressurized volume of water in a closed circuit that as the name implies drains back from the panels down to a storage tank at the end of every heating cycle. 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. Solar water heating systems that use only water as a heat transfer fluid are the most vulnerable to freeze damage. The solar drain back tank comes in seven models ranging from ten gallons to 80 gallons.

The drainback solar water heater is not the simplest and it requires some knowledge time and money to design and build it properly. Draining the collector and piping. Solar system when there is no longer a demand for hot water. Draindown or drainback systems typically use a controller to drain the collector loop automatically.

Objectives for the system are. It can also be purchased with or without a heat exchanger. High performance easy construction with simple materials long life and low maintenance all for a price that is about 1 7th of. Drainback system is one of the popular solar water heating systems whose main advantages over other types are reliability simplicity and low maintenance.

The advantage of a drain back system is built in freeze and overheating protection. Drain back systems have fewer components than pressurized systems making drain back systems easier to use service and maintain. Understanding solar hot water systems the drain back design. If you own this type of system have a solar heating professional check it periodically.

The drain back tank ships without a heat exchanger for use with a solar water heater with an internal heat exchanger. Drain back systems are a smart choice when designing a solar thermal system to supplement central heating and domestic hot water components. There are variations among the variations.