Noticeable drop in overall pool circulation flow whenever solar is activated.

Safety first: Turn off pump and relieve pressure before opening unions or valves.

• Inspect valves: Confirm all solar isolation valves are fully open when solar is active.
• Flush panels: One at a time, isolate and flush Heliocol panels by reversing flow (if plumbing allows) to dislodge debris from headers.
• Check piping size: Verify that solar feed and return lines meet Heliocol’s recommended diameters for the number of panels installed.
• Reconfigure array if needed: If too many panels are in series, consult a professional about splitting into parallel banks to reduce head loss.