1-888-QUIETCOOL
16
STL PRO-3.3X Wiring (see Figure 4.2C)
Feed the 2 wire Romex from your switch into the handy box. Tape the white wire on this end of
the Romex. Tie the blue & black wire together for high speed. Tie the red and taped white wire
together for low speed.
10. Tie the three remaining black wires together. Tie the three remaining white common wires
together. Tie the three bare copper wires and the two green ground wires together.
11. Carefully reinstall the handy box cover.
Power
Timer
Tie All Ground & Bare Copper Wires Together
Whole House Fan
14-2 Wire
14-2 Wire
Switch
14-2 Wire
Low Speed
High Speed
White Common Wires Together
Black Wires Together
White - Marked w/ Tape
Black
Figure 4.2C
4.3 THREE SPEED WIRING (FOR QC STL PRO-4.8X, 5.5X, 6.0X, & 7.0X)
1. For this installation, you will need (2) 2 wire Romex and (1) 3 wire Romex, a black jumper wire,
double-gang retrofit box, an 8 Hour Timer, and a Double 3-Way Combination Switch. Begin by
taking the jumper wire, and attach it to the top gold screw on the right and the bottom black
screw on the left of the switch. (see Figure 4.3A on page 17)
NOTE:
With a pair of needle nose pliers, break the bus on the switch. The bus is located on
the left between the two black screws. With a little finesse it is very simple to remove.
2. From the 3 wire Romex, attach the black wire to the 2nd gold screw on the right. Attach the
white wire to the 3rd gold screw, which should be identified with tape and will be used to power
medium speed. Attach the red wire to the 4th gold screw. With a piece of bare copper wire,
attach it to the green ground screw on the switch.
3. Using one of the supplied wire nuts, tie the black wire from the 2 wire Romex to the black wire
on the timer. Tie the white wire from the 2 wire Romex to the white wire on the timer.
4. Using a wire nut, tie all bare copper wires together with the green ground wire on the timer.
5. Attach the red leg wire from the timer to the first black screw on the switch. Finish up the
installation of the timer and switch and switch cover plate.
6.. Begin wiring the 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 4.3B on page 17)
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