The main components of the RADCO Drainback System are a water storage tank, a smaller tank that stores heat-transfer fluid (usually water), a solar panel collector that captures heat from the Sun, and a heat transfer system that transfers heat to the water tank.
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Radco has developed a mechanical-control package for drain-back systems. This Drainback Heat eXchange module (DBHX) is a factory-assembled unit which provides:
a single-walled heat exchanger,
collector fluid reservoir,
solar collector fluid circulator pump,
hot water booster circulator pump and
a differential temperature controller unit
..assembled into one attractive module. Most any solar collector and any water storage tank can be combined to form a drainback system!
Certifications and Compliances:
Los Angeles City Approval No. RR-4008
California Energy Commission & Arizona Solar Energy Commission
Radco DBHX 6000 Series Drainback Heat Exchange Modules
Operate a solar water heating system by transferring solar energy to a storage water tank.
The Radco DBHX 6000 series drainback systems have these strengths:
Allows most any solar collector and water storage tank to become a drainback system.
Modular design translates to lower labor costs for installation and less space requirements for installation.
Provides automatic and fail-safe freeze protection.
Works well in most climates.
Power is not required for the drainback freeze protection to work.
Does not need propylene-glycol to protect from freezing temperatures.
Low maintenance - No need for propylene-glycol or rust-inhibitor fluids translates to less maintenance requirements
The closed-loop to solar panels protect the collector's fluid passages from mineral build up caused by "hard" water --where water contains an excessive amount of dissolved minerals.
SRCC approved designs.