X10 Wirless Heater Control
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I took out a Mini Max 400 and installed a Master Temp 400. The customer has a wireless x10 system that controls the on and off of the heater by 24 vac via 3 wire control. (yellow pool, black common, green spa) Can these wires be connect on the circuit board on the external control block directly? Is there a way to have both remote control and manual direct membrane control of the heater?

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Bill,
Posted

Bill,
You can either control the heater via a 3 wire remote connection or a two wire. The three wire allows for control of the unit switching to either pool or spa mode and the desired temp associated on the heater itself. When this setting is enabled however, the membrane then becomes disabled and can only be controlled via this remote connection.
The more preferred means of connecting the controller would be via the 2 wire connection at the fireman’s switch. This allows for the heater to be commanded on and the controller then becomes the means of setting the set temp and offers a little more protection via the built in fuse. While operating the heater in this means, the membrane is still active but only when the controller is allowing the heater to run.

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I know this is an old post
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I know this is an old post but as a new member have additional question about remote control of my new PentAir Mastertemp 250 NG heater. I want to remote control only the on/off function on the heater with a do it myself control. Can I use the fireman jumper to take on/off control remote via a small 110vac ice cube relay that only makes contact closure for the fireman switch. No voltage would be applied to the jumper poles just making and breaking the circuit. If I read above posts correctly that would leave the pool/spa temp setting control on the membrane pad. Also will the remote switch remove power to the control circuit when in the off position. I don't want the expense of a PentAir remote control when I can do it with a simple easily installed relay. Just tired of walking around the house to turn off he heater once I'm up to set point to save gas here in SWF.

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