Loosen terminal W1 by turning counter clockwise using the white conductor wrap exposed copper around W1 terminal clockwise. The other end of conductor should be terminated at O terminal of the thermostat or other control device. Loosen terminal O by turning counter clockwise using the orange conductor wrap exposed copper around O terminal clockwise. The other end of conductor should be terminated at G terminal of the thermostat or other control device. Loosen terminal G by turning counter clockwise using the green conductor wrap exposed copper around G terminal clockwise. The other end of conductor should be terminated at R terminal of the thermostat or other control device. ![]() Tighten the terminal clockwise to secure. Loosen terminal R by turning the terminal counter clockwise, taking the red wire and wrapping the exposed copper around the terminal clockwise. It will be a set of seven terminals with the letters R,G,O,W1,W2,Y and C. Locate the heat pump low-voltage terminal board. for example, a blue wire could go on a Y terminal on the heat pump control board as long as the blue wire is attached on the other end to the Y terminal on thermostat or other controlling device. The most important thing is that the same color wire is connected to the same letter or number on the control board and the thermostat. Terminals are identified by letter or numbers. Strip each conductor’s jacket ½ inch back exposing the copper wire. Strip back the jacket off the wire to expose 10 inches of the seven conductors ensuring that you don’t nip the conductors. The seven conductors will have different colors for identification purposes. This means 18 gauge with seven conductors. Insert low voltage wire through the side knockout that is provided for low voltage wiring using the proper connector. Repeat the terminal L1 process for terminals L2 and 元. Loosen terminal L1 by turning the terminal screw counter clockwise once the terminal is loose slide one of the power wires under the L1 terminal and tighten by turning clockwise. The contactor is one of the largest components in the compartment and will have labeled terminals L1,L2,T1 and T2 on it locate terminals L1, L2. Locate the contactor in the high-voltage compartment. Once loosened slide the ground wire under the terminal and tighten down by turning the terminal clockwise. ![]() Loosen the terminal with a screwdriver by turning the terminal counter clockwise. A ground lug is a aluminum terminals that is mounted in the electrical compartment away from other components. Ground wire is commonly colored green or identified with green identification tape wrapped around it, while power wires are commonly colored red or black or identified with colored identification tape. Identify the high voltage wires and the ground wire. Single phase will be two power wires and a ground, three phase will be three power wires and a ground. You will have three wires for single phase and four wires for three phase. Cut wires to 8 inches in length and strip the covering back off each wire a ½ inch.
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