1-888-QUIETCOOL
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4.2 TWO SPEED WIRING (FOR QC STL PRO-2.5X & 3.3X)
1. For this installation, you will need (3) 2 wire Romex, double-gang retrofit box, an 8 Hour Timer,
and a HIGH-LOW-OFF Switch.
2. Using your first 2 wire Romex, tape the white common wire because we are going to use it for
low speed. Attach the white wire to the top gold screw on the right of the switch. Then, attach
the black wire to the bottom gold screw. (see Figure C)
3. With a piece of bare copper wire, attach it to the green ground screw on the switch.
4. Using the second 2 wire romex that’s going to your timer, use one of the supplied wire nuts to
tie the black wire to the black wire on the timer. Tie the white wire from the 2 wire Romex to the
white wire on the timer.
5. Using a wire nut, tie all bare copper wires together with the green ground wire on the timer.
6. Attach the red leg wire from the timer to the top gold screw on the left of the switch. Finish up
the installation of the timer and switch and switch cover plate.
7. Begin wiring the your fan by opening up the handy box. Take off the wire nuts within the handy
box. Detach the green ground wire from the power cord. Remove the power cord. Re-attach the
ground screw and wire to the handy box. Cut your green ground wire in half and strip both
sides. (see Figure D)
Switch
Tie All Ground & Bare Copper Wires Together
All Black Wires Together
All White Common Wires Together
Whole House Fan
14-2 Wire
Figure 4.1B
5. Begin wiring the fan by opening up the handy box. Take off the wire nuts within the handy box.
6. Unscrew the green ground wire. Detach the green ground wire from the power cord. Remove
the power cord.
7. Re-attach the ground screw and wire to the handy box. Cut your green ground
wire in half and strip both sides. (see Figure 4.1B)
8. Feed the 2 wire Romex through the handy box. Using the included wire nuts, tie the black wires
together. Tie the white neutral wires together. Tie your bare copper wire and green ground
wires together.
9. Carefully reinstall the handy box cover.
