The Two-Speed Controls may either be installed onto a flush mounted electrical
switch box or surface mounted onto the wall. The optional PrecisionSYNC
Control (435244) is to be surface mounted onto a wall. Only one control can be
installed with a ventilation system.
1. For the PrecisionSYNC Control (435244), remove the operating instructions
card from the top of the control (Figure 29, Box A).
2. Separate the face plate from the back plate by firmly pulling apart (Figure 29,
Boxes B or C). Be careful not to damage face plate contact pins.
3. For the PrecisionSYNC Control, place the back plate of the control in the
desired location on the wall and pencil mark the wall with the right and left
screw holes (Figure 29, Box D).
4. For the Two-Speed Switch with Humidity Sensor (435245) and Two-Speed
Switch with Intermittent Mode (435246), place the back plate of the control
in the desired location on the wall and pencil mark the top and bottom
screw holes (Figure 29, Boxes E or F). For mounting the control without a
decorative plate, break off top and bottom tabs and refer to Figure 29, Box F
for mounting.
5. Remove the back plate from the wall and mark the center hole for the wires
in the middle of the screw holes. Refer to Figure 29, Boxes D, E or F for
dimensions.
6. Drill (two) 1/8” (3 mm) holes for the screws and wall anchors (Figure 29,
Boxes D, E or F). For the PrecisionSYNC Control , drill a one inch hole in the
center (Figure 29, Box D). For the Two-Speed Switch with Humidity Sensor
(435245) and Two-Speed Switch with Intermittent Mode (435246), cut in a
3/4” (19 mm) by 1” (25 mm) oval hole in the center (Figure 29, Boxes E or F).
7. Pull 3-wire 20 gauge (minimum) 100 feet (30-1/2 meters) length (maximum),
through the opening in the wall.
8. Connect red, green, and yellow to the wiring terminals located on the back plate (Figure 29, Boxes D, E or F).
9. Attach the back plate to the wall using two supplied screws and anchors.
10. Attach the face plate to the back plate (Figure 29, Boxes B or C).
NOTE: Be careful to correctly align the face plate to avoid damaging the face plate contact pins.
11. For the PrecisionSYNC Control (435244), insert the instructions card into the control (Figure 29, Box A).
12. Connect the 3-wire 20 gauge (minimum) 100 feet (30-1/2 meters) length (maximum to the terminal block located on ventilator
(Red, Yellow, and Green).
13. On the terminal block connect a jumper wire between ON and RED. Refer to “Installing Standby Jumper” on page 25.
Installation of Controls
Terminal Blocks
BOX A
Operating
Instruction Card
BOX B
Face Plate
Back Plate
Keep top / bottom
vent openings cleared
BOX C
Back Plate
Front Plate
Keep top / bottom
vent openings cleared
BOX D
Two 1/8” (3 mm) holes
for screws and anchors
1” (25 mm) hole
for wire opening
Wiring
Te rminals
1.625"
(41 mm)
0.75" (19 mm)
1 "
1.625"
(41 mm)
BOX E
1/8” (3 mm) hole
for screw and
anchor
Wiring
Te rminals
1’ x 3/4”
(25 mm x 19 mm)
oval hole for
wire opening
1/8” (3 mm) hole
for screw and
anchor
1 "
BOX F
1/8” (3 mm) hole
for screw and
anchor
1’ x 3/4”
(25 mm x 19 mm)
oval hole for
wire opening
Wiring
Te rminals
1/8” (3 mm) hole
for screw and
anchor
Break off tab
Wire hole
centered
between
screw holes
0.75 " (19 mm)
Break off tab
IMPORTANT
Pay special attention not to damage the contact pins when removing and detaching the face plate.
Figure 29. Installation of Controls
Figure 27. Type A
The ASSURE-120S-S1, SYNC-110SE-S1 and SYNC-270TCE-S1
have a terminal block Type A as shown in Figure 27.
Figure 28. Type B
The SYNC-180SCE-S1 has a terminal block Type B as shown in
Figure 28.
H
L
ON
R
Y
G
C NO NC DH
Top View
Residential Energy Recovery Ventilators
21
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