Heater problem

[Telemachus]

2025.

heater bypass valve stilll doesn't work on master temp 400. When using RS485, it will never exit cool down mode or move the actuator back to original position.

 

[ajw22]

Pentair tried to fix the problem in the MasterTemp firmware with version 2. Reports are it still does not work correctly.

Easy workaround is to let the IntelliCenter control the bypass actuator.

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com

Members report that the automatic bypass will not "bypass" the heater after the cooldown when the valve is plugged into the heater BP_VLV on the PCBA circuit board. Pentair has been notified of this problem.

Instead, those with an IntelliCenter have moved the bypass valve actuator wire to the Intellicenter board and tied it into the heater circuit. The bypass actuator can be plugged into Valve A without a solar valve. The Solar Valve defaults to Valve A, and the heater bypass needs to be plugged into Valve B.

In the IntelliCenter Setup you need to associate the bypass valve - A or B - with the heater circuit - Heater or MasterTemp.

It bypasses immediately when the Intellicenter is no longer calling for heat. The IntelliCenter Users Guide says, "Heaters manufactured by Pentair Water Pool and Spa do not require this cool-down period and do not need the delay to be set up." Additionally, the Pentair Installation Instructions for the Automatic Bypass Valve instructs the bypass valve to be set to not fully close when bypassed.

 

[Telemachus]

Very Lame.