Thermostat with Power Modules (TH115-AF-12VDC / CT230 series)

All thermostats are mandated at 42" height for handicap accessibility, most private residences are mounted at 52-60".

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When the ground fault protection mechanism trips, the TEST light is On (red). To reset the ground fault protection, switch the thermostat to Off and back to On. The TEST light will turn off.

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No. The Honeywell CT230 must be controlled by a Honeywell Master Thermostat.

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No. The nJoin power module is not compatible with a Honeywell system.

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To reset the ground fault protection, switch the CT230 OFF and back ON, or cycle the circuit breaker off and on. The TEST light will turn off if the ground fault protection is functioning properly. If the TEST light comes back on, contact Warmly Yours at 1-800-875-5285 and speak to a technical support representative to help further troubleshoot your system.

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Verify that the master thermostat is calling for heat. If it is and the light does not illuminate, this means that the test has failed. Cut power to the heating system at the main electrical panel, have a qualified electrician verify the installation and, if necessary, replace the CT230.

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Two (2) wires; just the ground and the drive wires.

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The Master Thermostat.

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Three (3) wires; Ground, Drive, and 12 Volt DC.

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The Master Thermostat must operate on 12 VDC and is powered by one of the CT230 linked units.

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Up to ten (10) CT230 linked units can be used in a given system.

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The wire distance between the master thermostat and each CT230 unit must not exceed 500 ft. (150 m). 20-AWG wires are recommended.

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If your thermostat is blank, the first thing to do is to test to see if voltage is present at the rear of the thermostat. Verify that the power module power switches are in the ON position. Test for 12VDC across the 12VDC screw and the GROUND screw at the back of the thermostat. Here is a wiring diagram: https://www.warmlyyours.com/en-US/publications/MASTER-THERMOSTAT-W-POWER-MODULES-WIRING-DIAGRAM-B.pdf
If no power is reaching the thermostat, please test for 12VDC across the 12VDC and GND output at the front of power module base that is supplying power to the thermostat (the faceplate must be installed). If no power is present there, please inspect the circuit breaker in the breaker panel powering the power modules, and verify that the breaker is a non-GFCI type. If it is a GFCI breaker, replace it with a non-GFCI breaker. If there is power entering the thermostat and it is blank, it will need to be replaced. If power is getting to the power module and there is no 12VDC output to thermostat, the power module will need to be replaced.

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The manufacturer reversed the wiring pattern between the LOAD side and the LINE side on newly minted controllers, verify that your wiring matches the new wiring schematic stamped on the backplate of the new controller.

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