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A C O R N C O N T R O LVA LV E S . C O M
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CHANGING THE MIXING VALVE SETPOINT
From the “ALARM/ALERT SETTINGS SCREEN”
To change the setpoint, use the ”Loop #1 or Loop #2 Slide Bar at the Valve Settings Screen” or + or - but-
tons. Please note the setpoint limit values also shown and adjustable from the Operating Overview Screen.
If you do not stay within the allowable limits an alert (yellow graphic) will appear on screen and, if selected,
email and/or text notification will be sent. Refer to appendix B for alert/alarm relay output connections.
If your BASyC™ system is equipped with Recirculation Pump Control, a user adjustable
temperature, used to cycle the pump on and off, has either been factory set or must be user set.
Go to the “Pump Control and Data” screen and the section titled “Recirc Pump Control Settings.” Here you will set:
• The “pump off” setpoint
• The pump relay dead band
The dead band represents the number of degrees the temperature must drop below the setpoint before the
pump is turned on again. Dead band prevents relay “chatter” and fast cycling of the pump, a condition that
could result in a shorter pump life.
Using the “+” and/or “-” button or slide bar, select the temperature BASyC™ will use to turn off the relay that
controls the recirculation pump. Acorn recommends a continuously operating recirculation pump for 1) optimal
temperature control 2) Legionella control and 3) maximizing the life of the pump. The flow rate of the pump
should meet or exceed the flow rate certified by IAPMO for the Acorn mixing valve or valves in use. Please
consider setting any pump shut-off device installed (ex: AquaStat) to activate, i.e. stop the pump, prior to the
return water reaching a temperature that indicates a high risk to the bather.
IMPORTANT:
Acorn recommends at “pump off” setpoint 5-10° F
below the Master Mixing Valve setpoint. A minimum
3-5° F dead band is recommended.
Example:
If your Master Mixing Valve has a setpoint of
130° F a typically “pump off” setpoint would be 123° F
with a 3° F dead band.
RECIRCULATION PUMP CONTROL SETTINGS
