Solar Hot Water Reduces Arizona Utility Costs

Receive up to*

APS/SRP Utility Rebates	$2,025
Federal Credit	$2,000
AZ State Tax Credit	$1,000
Total Credits and Rebates!	$5,025

Call Us Today for a FREE Estimate! (602) 393-9400

Download our Solar Hot Water Flyer (1.5 MB)

*Amounts may vary please call for details.

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Drainback Solar Hot Water Heating Systems

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.

HOW OUR RADCO DRAINBACK SYSTEM WORKS:
A heat-transfer fluid, usually distilled water, will circulate through the system when the collector’s solar sensor determines that there is a usable amount of heat from the sun’s rays. The fluid is pumped from the Drainback’s heat transfer tank to the collector on the roof where it is heated. It is then pumped back to the tank where it transfers it’s heat to your home’s hot water tank (we offer storage tanks tailored to your household’s needs) for you to use. The heat transfer portion of the system is only filled with the transfer fluid when the pump operates. When the pump is not on, water will drain by gravity out of the system and back into the heat transfer tank. This leaves the collector empty and full of air at times when freezing temperatures could occur.

• Long history of reliability. Our drainback system can operate for years without requiring you to perform any maintenance. A solar water heater can work just like any other appliance in  your home. It “just works”
• Freeze protection is part of the basic design of our Drainback system. All the water drains out of the solar panel and any exposed piping whenever the pump is not active - such as at night, when it is an inefficient solar heating day (freezing temps or heavy cloud coverage) cold during the day, or there is an electrical power outage, draining by gravity back into the drainback heat transfer tank.
• No costly, high maintenance transfer fluid needed. No need to periodically flush and fill the system with expensive, new anti-freeze fluids, instead works with distilled water in a closed system loop.
• Meets requirements to be a SRCC OG-300 certified configuration, which in many markets means that this system will be eligible for tax credits and rebates for most solar tax programs.

 

DRAINBACK HEAT EXCHANGE MODULE

• Designed for Solar Water Heating Systems
• Transfers Solar Energy to a Storage Tank
• Provides Automatic and fail-safe Freeze Protection

List identifying parts in the diagram

1. Radco 410-PHP (4ft by 10 ft) solar panel.
2. 10 k sensor.
3. Solar hot water OUT at increased temperature back to reservoir in drainback tank.
4. Cold water IN from utility or well supply.
5. Watts 70A anti-scalding mixing valve.
6. Pentair In-Line temperature gauge.
7. Pressure relief valve vent pipe.
8. Optional Solar Storage tank (not part of the ksdb8 package) can be installed next to existing electric or gas / heater.
9. Taco 009-F5 pushing 8 gallons of reservoir water up to the solar panel.
10. Sensor wire.
11. 4500 watt electric heating element (optional).
12. Pentair flow meter.
13. Solar HOT-IN from drainback heat exchanger.
14. Watts T/P valve.
15. Colder water from bottom of storage tank circulating back through drainback heat exchanger.
16. 8 gallon water reservoir.
17. Internal heat exchanger inside the EDX drainback tank, surrounded by solar-heated water coming from the panel.
18. Delta DDT-94 differential solar controller.
19. Taco 006-B4 circulator is pumping water from the bottom of the solar storage tank through the heat-exchanger into the top of the solar storage tank.
20. Watts 530 L pressure relief for drainback reservoir loop.
21. Sensor wire.
22. Incoming reservoir water from the drainback tank.
23. Hot water OUT to place of use.

Specifications

Absorber Plate: 0.008 inch Rollformed copper sheet
Absorber: Black Chrome selective coating over nickel plate or
electrostatic black paint.
Plumbing: Type M Copper: 1 inch or 1.5 inch internal copper manifolds with 0.5 inch O.D.waterways.
Manifold Seal: EPDM Insert
Glazing: 0.125 inch Low iron tempered glass
Glazing Seal: Extruded "U" channel
Insulation: Foil faced ployisocyanate insulation board. "C" models include a fiberglass
Blaket that better withstand the higher operating temperatures.
Frame: Finish:Bronze anodize
Backing Sheet: Bonze painted and embossed 0.018 inch aluminium sheet.

Model Number	Width (Inches)	length (Inches)	Depth (Inches)	Square F.I	Filled Weight	Absorbor Coating	SRCC Energy Savings	Water Heater Cap.
308P	35.125	97.125	3	22.11	83	Flat Balck Paint
308C	35.125	97.125	3	22.11	85	Black Chrome
408P	45.75	101.625	3	30.21	112	Flat Balck Paint
408C	45.75	101.625	3	30.21	115	Black Chrome
410P	45.75	125.625	3	37.55	137	Flat Balck Paint	2500 KWhr	80
410C	45.75	125.625	3	37.55	141	Black Chrome	2700 KWhr	80
412P	45.75	152.125	3	45.64	164	Flat Balck Paint
412C	45.75	152.125	3	45.64	169	Black Chrome