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Installing Main Control
The main control may be installed onto a 2" x 4" electrical
switch box or it may be surface−mounted onto a wall.
Only one master control should be installed to a ventilation
system (Note, the face plate on this illustration may not be
exactly the same as yours).
1. Remove the Operating Instructions card from the top
of the control (see figure 19, detail A).
2. Separate the faceplate from the back plate by firmly
pulling apart (detail B). Be careful not to damage face-
plate contact pins.
3. Place the back plate of the control in the desired loca-
tion on the wall and pencil mark the wall in the center
of the wire opening, top screw hole and bottom screw
hole (detail C).
4. Remove the back plate and drill a 3/8" opening in the
wall to allow for the wire opening and a 1/8" hole for the
wall anchors for the top and bottom screw holes (detail
D).
5. Pull 3 wires (20 gauge, min.) through the opening in
the wall and the wire opening of the back plate (detail
C).
6. Connect red, green and yellow to the wiring terminals
located on the back plate (detail C).
7. Secure a single wire to the wire retainer located on the
back plate (detail C).
8. Attach the back plate to the wall using the 2 supplied
screws and anchors.
9. Attach the faceplate to the back plate (detail B). BE
CAREFUL to correctly align the faceplate to avoid
damaging the faceplate contact pins.
10. Insert the Operating Instructions card into the control
(detail A).
11. Connect the 3 wires (20 gauge, min.) to the terminal
block located on the ventilator (detail E).
IMPORTANT
Inspect contact pins for damage or misalignment.
Pins must be perpendicular to printed circuit board
and evenly spaced for proper alignment to face
plate.
Detail E
TERMINAL BLOCK CONNECTIONS (located on ventilator)
Yellow on control to YELLOW #4
Red on control to RED #3
Green on control to GREEN #5
(use 3 wire /20 gauge wiring [min.])
RED #4
YEL #3
GRN #5
Detail A
MAIN CONTROL FACE PLATE
Operating
Instructions
Card
Separate
face plate
from back
plate
Detail B
MAIN CONTROL SIDE VIEW
Face
plate
contact
pins
Face
plate
Back
plate
Detail C
FRONT VIEW OF BACK PLATE
Detail D
(Drill holes in wall)
Drill 1/8" hole for
the top screw
and anchor
Drill 3/8" hole for
the wire opening
Drill 1/8" hole for
the bottom
screw and an-
chor
Top screw
hole
Wire opening
Wire retainer
Wiring
terminals
Bottom screw
hole
Detail F
Correct installation of back plate
Face
plate
contact
pins
Face
plate
Back
plate
Wall face
Dehumidistat sensor
openings to room air
allow accurate sen-
sor readings.
Caution: Low
Voltage Only
Figure 19. Main Control Installation
