DUCKT-STRIP Wiring

249 VAN Launch Kit 249 VAN Consumer Brochure Smart Thermostat Sell Sheet 249 VAN Launch Kit

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This installation was on a 4-story home, and the tech had not yet gone to the basement to troubleshoot the “infinity” water source heat pump, as he was told he by the homeowner. He was in the attic at the infinity furnace above the 4th floor. He was getting his dcv in the proper range on his A and B green plug on the air handler, 3 to 4 vdc. His indoor board ohm reading was in range, 28k to 32 k. The tech ohmed out the A and B thermostat wires on the water source heat pump from the upstairs. His ohm reading was not in range of a normal infinity board. His reading was around 64.4k. The tech then made the long walk to the basement where the “geothermal heat pump” was located. Bingo.

Lastly, reinstall the OFM in the unit and turn the power on. I highly recommend taking amp readings from the motor to ensure the motor is not over amping. After all this is done, please visit your local Mingledorff’s to get the correct OFM.

The wire is designed to not have interference on the “S” wire or the 3 wire depending on how the unit is labeled. They do this by spacing the S wire away from the L1 and L2 with the ground wire in between.

When the wire is stripped back, you will see a black wire, white wire, bare copper wire and the red wire.

L1-black, L2-white, bare copper wire is earth ground and the red is S or signal wire. Depending on how the unit is labeled it could be 1 2 3. 1-L1 2-L2 and 3 is S or signal.

If wired wrong, and some people do, you can get an E1 fault code. E1 is communication failure between the indoor and outdoor unit. Some people think the red needs to land on L2 or 2 terminal and white wire on S or 3 terminal. If this happens the S wire is right next to a high voltage wire and could possibly induce a volts over on the signal wire causing the communication to scramble and get the E1 fault.

Follow this wiring and you should not have any problems.

Terminals for the indoor unit:

L1-BLACK WIRE

L2-WHITE WIRE

GROUND-BARE COPPER WIRE

S-RED WIRE