PB’s electrician wired MasterTemp incorrectly.

Candurin

Well-known member
Jun 30, 2017
388
South Jersey
Pool Size
13000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Yesterday, I finally ran the gas pipe for our new PB that was installed in November. I went to turn on the heater and fired right up.

The issue is that I set the heater temp to 104 at the heater control panel and 62 degrees at the IntelliCenter. Water temp was at 58 degrees.

IC called for heat, showed flame symbol and got up to 62 degrees. Then IC showed no more flame and indicated it was not heating anymore.

Went outside a short while later and saw that the water was now 67 and heater still chugging along.

Did some investigating and the electrician wired the gas heat connector (J2) to the spa/common/pool port on the MasterTemp control board.

I’m not even sure how this is even functioning at all, but I digress.

Does this seem like the proper fix:

I assume that I just need to remove the yellow jumper cable in the fireman’s switch and then change the white and red wires from the com port on the heater to the spade terminals on the firemans’s switch. I was thinking of cutting the yellow jumper wire and soldering each half (using the spades) to the white and red wire.

That should give me proper heater control, correct?

Here’s two pics showing the wire as it currently configured (to com port) and the fireman’s switch:

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Last edited:
That's not an RS-485 port, it's the 3 wire connection which allows the automation to select "Pool On" or "Spa On".

The Fireman's switch is where you should connect the remote control.

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I was about to call @JamesW.. but there he is!
For some reason I was convinced that was the com port :). Upside down photos and all.

I rewired to fireman’s switch and now works perfectly.

As mentioned in another thread. The manual calls for RS-485 connection from MT to IC but there is no comm port on the MT board. Oh well!

Thanks!
 
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