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Thread: SR400NA Max-E-Therm power (ET4)

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    SR400NA Max-E-Therm power (ET4)

    Hello,

    How does a heater (Max-E-Therm 40k BTU) get powered in a EasyTouch 4? Just connect to a standard /1 pole 15/20A breaker? I checked the heater electrical diagram and it seems is already set for 120V. Attached is pic of electrical panel and wirign diagram. I hope someone familiar with this heater can confirm no other parts/changes are needed in order to use at 120V.

    Thanks in advance everyone!

    Lee
    Attached Images Attached Images
    34,000 gal Pool & Spa combination, IntelliFlo 3050 (4 x 160) pump
    ET4 + IC40, Sta-rite heater, Hayward cartridge filter

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    Join Date
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    Re: SR400NA Max-E-Therm power (ET4)

    I think its on page 28 of this manual:

    http://www.pentairpool.com/pdfs/MaxETherm.pdf


    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

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    JasonLion's Avatar
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    Re: SR400NA Max-E-Therm power (ET4)

    On the bottom left of your photo is a plug with a number of black wire loops on it. That should be labeled 120 volt or 240 volt on the side of the plastic plug body. From what I can see in the picture, it looks like you have the 120 volt plug installed, but it is a good idea to look for the label just to be completely sure.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: SR400NA Max-E-Therm power (ET4)

    Thanks for the confirmation!

    Based on the wiring diagram ( and page 28 of the manual, which I somehow missed ) it looks like the heater is 120V ready. However, the installer,said he'll need to come back with a part to make it work on 120V, as it is currently set for 240V. Maybe this has to do with the hourly rate ?!

    Not dealing wit this on a daily basis, I thought I should double check-just to be sure.

    I guess all I have to do is connect the wires to the breaker.
    Oh, something else: I think ( I am not by the pool) there are only 2 wires coming from the heater (besides the thin wires for heater control). Shouldn't there be 3 wires ( 1 for ground)?

    Thanks again!

    Lee
    34,000 gal Pool & Spa combination, IntelliFlo 3050 (4 x 160) pump
    ET4 + IC40, Sta-rite heater, Hayward cartridge filter

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    Re: SR400NA Max-E-Therm power (ET4)

    Quote Originally Posted by leered
    Based on the wiring diagram ( and page 28 of the manual, which I somehow missed ) it looks like the heater is 120V ready. However, the installer,said he'll need to come back with a part to make it work on 120V, as it is currently set for 240V.
    The picture shows that the black plug is in. The black plug is the 120 volt plug; the 240 volt plug should be red. The heater comes from the factory wired for 240, so someone must have switched the plugs.

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    Re: SR400NA Max-E-Therm power (ET4)

    Quote Originally Posted by JamesW
    Quote Originally Posted by leered
    Based on the wiring diagram ( and page 28 of the manual, which I somehow missed ) it looks like the heater is 120V ready. However, the installer,said he'll need to come back with a part to make it work on 120V, as it is currently set for 240V.
    The picture shows that the black plug is in. The black plug is the 120 volt plug; the 240 volt plug should be red. The heater comes from the factory wired for 240, so someone must have switched the plugs.
    Thanks for the confirmation! Maybe my installer just assumed the heater still has the factory settings ...even though...you have to check NOT just assume!

    Lee
    34,000 gal Pool & Spa combination, IntelliFlo 3050 (4 x 160) pump
    ET4 + IC40, Sta-rite heater, Hayward cartridge filter

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    JasonLion's Avatar
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    Re: SR400NA Max-E-Therm power (ET4)

    Yes, there should be three power wires running to the heater, they are normally black, white, and green for 120 volt use. There will also be two low voltage wires running to the timer or automation system.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: SR400NA Max-E-Therm power (ET4)

    There is a picture on page 28 that shows the plugs, with the black one labeled as 120 and the red one labeled as 240. Before connecting the power, check the voltage of the power source to confirm that it is the same as the plug label.
    The heater ships from the Factory with the 240V plug installed. Installing the 120V plug and then connecting the heater to 240V line current will immediately destroy the transformer, control board and ignition control module, and will void warranty. If you install the 240V plug and connect the heater to 120 volts line current, the heater will not operate.

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    Re: SR400NA Max-E-Therm power (ET4)

    Quote Originally Posted by JamesW
    There is a picture on page 28 that shows the plugs, with the black one labeled as 120 and the red one labeled as 240. Before connecting the power, check the voltage of the power source to confirm that it is the same as the plug label.
    The heater ships from the Factory with the 240V plug installed. Installing the 120V plug and then connecting the heater to 240V line current will immediately destroy the transformer, control board and ignition control module, and will void warranty. If you install the 240V plug and connect the heater to 120 volts line current, the heater will not operate.
    Thanks for all the help! HEATER IS/WAS READY FOR 120V ! Tested : heater comes on when pushign HEATER button on ET4 panel)

    Thanks again!
    Lee
    34,000 gal Pool & Spa combination, IntelliFlo 3050 (4 x 160) pump
    ET4 + IC40, Sta-rite heater, Hayward cartridge filter

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