Solar Water Heating Drain Back System

Draindown or drainback systems typically use a controller to drain the collector loop automatically.

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 variations among the variations. It can also be purchased with or without a heat exchanger. The drainback solar water heater is not the simplest and it requires some knowledge time and money to design and build it properly.

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. Draining the collector and piping. It s ultimately up to you and your project needs but our system does not need to have a drainback system installed in it in order to work. High performance easy construction with simple materials long life and low maintenance all for a price that is about 1 7th of.

Drain back systems have fewer components than pressurized systems making drain back systems easier to use service and maintain. 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. If you own this type of system have a solar heating professional check it periodically.

The 1k solar water heating system the next 5 entries are for a simple all climate drain back solar water heating system i have been developing and have installed at my place. Understanding solar hot water systems the drain back design. Drain back systems are a smart choice when designing a solar thermal system to supplement central heating and domestic hot water components. Objectives for the system are.

The drain back tank ships without a heat exchanger for use with a solar water heater with an internal heat exchanger. Solar system when there is no longer a demand for hot water. The advantage of a drain back system is built in freeze and overheating protection.