Recent content by davidesstein

To Bama Rambler, who asked: "What controllers are being used for each system?" Answer: For the solar system, a Heliotrope General's Helio-Matic HM5000A (which appears to have two setpoints: "For differential 6°/3° jumper in; 9°/6° jumper out"). The gas heater is a Jandy LRZ with an internal...

I'm a new board member at a condominium association in the Los Angeles area. The complex has an outdoor spa with two heating systems: natural gas and solar. That's where I can use some help figuring things out. First issue: the control system design puzzles me. The two systems' temp. sensors...