I replaced my Jandy Laars LX 400 heater with a Hayward FDN 400 natural gas heater heater over the weekend. The Jandy heater had 2 Jandy actuator valves controlling water flow when spa or pool heating is selected.
I however do not see an option on the Hayward heater to automate the switching of the water flow when selecting pool or spa heating?
Am I missing something or do I need to add a control system to automate the water flow when heating pool or spa?
Looking forward to a reply