950-STCL1 Solar Thermal Closed-Loop Troubleshooting Learning System
by Amatrol
Solar thermal systems are long-term investments that homeowners and businesses expect to operate reliably for decades. When a closed-loop solar thermal system underperforms or fails, the technician who gets the call needs to know far more than how the system was installed. They need to understand the specific operating behavior of both drainback and pressurized closed-loop configurations, know how to program and adjust a digital differential controller, interpret flow meter and temperature probe readings, trace fluid and electrical faults through a complete system, and diagnose problems at both the component and system level.
That combination of knowledge and hands-on troubleshooting skill is what the Amatrol 950-STCL1 Solar Thermal Closed-Loop Troubleshooting Learning System develops. Through a unique combination of interactive multimedia eLearning curriculum and hands-on experience with a comprehensive set of real industrial solar thermal components, the 950-STCL1 teaches students to connect, operate, program, and troubleshoot both drainback and pressurized closed-loop solar thermal systems. The system supports portions of the NABCEP Certified Solar Thermal System Installer examination, connecting classroom training directly to the industry credential that solar thermal employers recognize.
Klein Educational supplies Amatrol alternative energy training systems to CTE programs, community colleges, and technical training centers across California, Oregon, Washington, Arizona, Nevada, Hawaii, and Alaska. As the only authorized Amatrol distributor in these seven states, we help programs get the right system configured and running.
What is the Amatrol 950-STCL1?
The Amatrol 950-STCL1 Solar Thermal Closed-Loop Troubleshooting Learning System is a mobile workstation built around a wide variety of industry-standard solar thermal components that give students hands-on experience with the actual systems they will troubleshoot in the field. The workstation includes a centrifugal pump, heat exchanger, digital differential controller, temperature probes, vacation bypass, check valves, relief valves, flow meters, tempering valves, solar storage tank, drainback tank, expansion tank, multiple component circuit panels, and two solar collectors, covering the complete range of components found in both drainback and pressurized closed-loop solar thermal systems.
The inclusion of components for both system types in a single workstation is a critical design feature. Both drainback and pressurized closed-loop systems are widely used across regions that experience freezing conditions, and a fully qualified solar thermal technician needs to be competent in troubleshooting both. Students can switch between the two system configurations using valving on the workstation, allowing them to study the unique operating characteristics, failure modes, and troubleshooting procedures of each system type on the same training platform.
The digital differential controller included with the system features many programming capabilities, allowing students to learn how to program the more sophisticated controllers they will encounter in installed systems throughout their careers. Controller programming is an increasingly important skill as modern solar thermal systems incorporate more configurable electronic control.
Fault insertion: electrical and fluid faults
The most important troubleshooting training feature of the 950-STCL1 is its fault insertion capability, which covers both electrical and fluid system faults. This dual fault capability reflects the actual diagnostic challenges of solar thermal troubleshooting, where technicians must be equally comfortable diagnosing electrical problems in the pump, controller, and sensor circuits and fluid system problems in the piping, valves, heat exchanger, and storage tank.
The wide array of electrical and fluid faults allows instructors to replicate realistic component and system-level failures with precision, giving students the experience of independently solving the many common types of problems they will encounter on the job. Students develop the diagnostic thinking and systematic troubleshooting approach that are the hallmarks of a highly skilled solar thermal technician, rather than simply following predetermined fault-finding procedures.
What students and trainees learn
The 950-STCL1 curriculum covers the full range of solar thermal closed-loop troubleshooting knowledge and hands-on skills that technicians need across both drainback and pressurized system types.
Solar thermal component topics cover solar collector construction and operation, centrifugal pump operation and maintenance, heat exchanger operation and performance, digital differential controller operation and programming, temperature probe operation and calibration, solar storage tank operation, and the function and operation of vacation bypass, check valves, relief valves, flow meters, and tempering valves.
Drainback system topics cover the unique operating characteristics of drainback closed-loop systems, system startup and shutdown sequences, drainback tank sizing and operation, freeze protection through the drainback mechanism, and drainback system-level troubleshooting.
Pressurized system topics cover the unique operating characteristics of pressurized closed-loop systems, expansion tank sizing and operation, system pressurization and pressure management, freeze protection using antifreeze heat transfer fluid, and pressurized system-level troubleshooting.
Troubleshooting topics cover systematic fault isolation approaches for both electrical and fluid faults, using temperature measurements and flow meter readings for diagnostic purposes, interpreting differential controller diagnostics and fault indicators, diagnosing pump failures, heat exchanger fouling, valve failures, and sensor faults, and system-level performance analysis to identify degraded but not fully failed components.
Indoor and outdoor training capability
The 950-STCL1's two solar collectors can operate either outside with direct sunlight or inside with the optional Solar Thermal Sun Simulator (95-STS1). The sun simulator provides the heat energy needed to simulate solar thermal power indoors, giving programs full scheduling flexibility for their solar thermal curriculum regardless of weather conditions. This is the same indoor-outdoor flexibility design that Amatrol builds into its full solar thermal product line, ensuring that training is never weather-dependent.
Multimedia eLearning curriculum
The 950-STCL1 includes Amatrol's interactive multimedia eLearning curriculum covering solar thermal troubleshooting topics using text, audio, video, interactive quizzes, and 3D animations. The curriculum is built to begin with the basics, such as solar collectors, pumps, heat exchangers, and solar storage tanks, and advance steadily to more complex system operation, programming, and troubleshooting concepts. Each theoretical concept is paired directly with a hands-on application task on the 950-STCL1 workstation.
The highly interactive format supports multiple learning styles, including reading, listening, and visual approaches, with voiceovers of all text, 3D animations illustrating system operation and fault scenarios, and interactive exercises that verify comprehension before students advance to hands-on practice. A Student Reference Guide compiled from the curriculum's technical content is included with the system.
NABCEP certification preparation
The 950-STCL1 supports the knowledge needed for the NABCEP Certified Solar Thermal System Installer examination. Programs that use the 950-STCL1 alongside the 950-STOL1 Solar Thermal Open-Loop Troubleshooting Learning System and the 950-STF1 Solar Thermal Installation Training System build a complete solar thermal education pathway covering both closed-loop and open-loop system troubleshooting and installation skills that comprehensively prepares students for NABCEP solar thermal certification.
How Klein Educational supports your program
Klein Educational is more than an equipment supplier. We work with program directors, department heads, and workforce administrators from the first conversation through delivery and beyond. That includes needs assessment, system configuration, and support to ensure your program gets the right 950-STCL1 setup for your curriculum and facility.
As the only authorized Amatrol distributor in California, Oregon, Washington, Arizona, Nevada, Hawaii, and Alaska, we have direct access to the full Amatrol alternative energy product line, curriculum, and support infrastructure.
Frequently asked questions
What is the Amatrol 950-STCL1? The 950-STCL1 is a solar thermal closed-loop troubleshooting learning system built around a mobile workstation with real industrial solar thermal components covering both drainback and pressurized system configurations. It includes a centrifugal pump, heat exchanger, digital differential controller, temperature probes, vacation bypass, check valves, relief valves, flow meters, tempering valves, solar storage tank, drainback tank, expansion tank, multiple circuit panels, and two solar collectors, with both electrical and fluid fault insertion capability.
Does the 950-STCL1 cover both drainback and pressurized systems? Yes. The 950-STCL1 includes the components needed to configure both drainback and pressurized closed-loop systems, and students can switch between the two configurations using valving on the workstation to study the unique characteristics and troubleshooting procedures of each system type.
What types of faults can be inserted on the 950-STCL1? The system supports both electrical faults in the pump, controller, and sensor circuits and fluid system faults in the piping, valves, heat exchanger, and storage system, reflecting the full range of fault types that solar thermal technicians encounter in field service work.
Can the 950-STCL1 be used indoors? Yes. The optional Solar Thermal Sun Simulator (95-STS1) provides the thermal energy needed to operate the system indoors, giving programs full scheduling flexibility regardless of weather conditions.
Does the 950-STCL1 support NABCEP certification? Yes. The 950-STCL1 curriculum supports the knowledge needed for the NABCEP Certified Solar Thermal System Installer examination.
Does Klein Educational help with system setup and configuration? Yes. Klein works with programs from needs assessment through system configuration and delivery, ensuring programs get the right solar thermal troubleshooting training setup for their curriculum and facility.
Ready to Build a Solar Thermal Troubleshooting Training Program?
Whether you are adding closed-loop solar thermal troubleshooting to an existing renewable energy curriculum or building a complete NABCEP solar thermal certification pathway, our team will help you find the right 950-STCL1 configuration for your needs and budget.