DXR Drainback
Page 25
The water heater should be flushed on an annual or bi-annual basis following the manufacturer's recommendations.
Exterior pipe insulation should be treated as required with an exterior UV inhibitor paint or an all service jacket.
Contact your authorized AET Dealer if you feel insulation needs re-coating or replacement.
NON-ROUTINE MAINTENANCE / TROUBLESHOOTING
In case of a leak in the collector system, first attempt to identify the source of the leak, then unplug the controller.
Since the solar loop is isolated from the water heater via the heat exchanger, no valves need to be operated. If the
leak is in the collector contact your installation contractor listed below or AET direct for instructions on how to
repair or replace the absorber plate.
For leaks in the potable water system or the water heater, unplug the solar controller and close off the cold water
inlet to isolate the solar system, until a suitable repair can be made.
VACATION PROCEDURES
If no hot water is to be used for some time, unplug the controller. To re-energize the system, simply plug the
controller back into the power receptacle.
SYSTEM PARTS LIST
AET P/N
Description
varies
AE-26, AE-32 or MSC-26, MSC-32
varies
uses customer’s existing water heater
varies
“Thermomiser” Drainback models: DB-10-10XC
varies
Grundfos UP 15-100F w/flange kit and UP 15-10 SU7P or
Taco 009F5 w/flange kit and Taco 003B
varies
EagleSun DTC-ES-1 or Goldline GL-30 w/2 -10k sensors
BD-75
Watts BD Series or equivalent
PR-30
Watts 3L-Z9 (30 psi) or equivalent– included with the drainback tank
TPRV-8
Watts 100XL-8 or equivalent
* BV-75
Watts B6001 Series or equivalent
* 1170-M2
Watts 1170 tempering valve or equivalent
* CT-12M
½” Type M copper tube
* CT-34M
¾” Type M copper tube ( ½” for single collector installations)
* PI-5812
½” Pipe insulation (5/8” O.D.), ½” wall thickness or equivalent
* PI-7812
¾” Pipe insulation (7/8” O.D.), ½” wall thickness or equivalent
* WH40
Intermatic “Little Gray Box” Water Heater Time Switch or equivalent
* parts provided by others
ESTIMATED COMPONENT LIFE
When installed and maintained as directed in this manual, one can expect many years of trouble-free service from
this system. All components in this system are subject to the conditions of the installation. In locations where hard
water is present, mineral deposits can prematurely foul-out the design life of these components. Periodic
maintenance is required to insure that these components are well protected from such damage.
The solar collectors used in this system have a design life of 30+ years. Water heaters are designed for 12-20 years
of use. The lesser components, such as pumps and valves are designed for 5+ years, however, are more likely to
foul, as described above, if not maintained properly.
WARRANTIES AND DISCLAIMERS
Please note that we specifically exclude any warranty for, or liability from, acts of nature, including freeze damage
and shading of the collectors by future growth.