Two-Speed Switch with Intermittent Mode (435246)
Two-Speed Switch with Humidity Sensor (435245)
The control offers the following features to control your home’s ventilation.
• Two-speed fan setting (LOW / HIGH)
• Standby setting (fan OFF)
• 20min on / 40min off mode (fan defrost models)
• 20min on / 40min recirculation mode (damper defrost models)
• Compatible with Wireless Timers. Connect to 3 wire 20 gauge low voltage wire
• Slim-line design
The control offers the following features to control your home’s ventilation.
• Two-speed fan setting (LOW / HIGH)
• Standby setting (fan OFF)
• Electronic dehumidistat
• Compatible with wireless timers. Connect to 3-wire 20 gauge low voltage wire.
• Designed to be mounted in a standard 2 x 4” (51 x 102 mm) electrical box or
surface mounted to a wall.
LO
HI
On / OFF
Button
20 / 40 Mode
Button
Fan Speed
Button
Fan Speed
Indicator
20 / 40
Mode
Indicator
Light
On / OFF
Light
20/40
Table 6. Two-Speed Switch with Intermittent Mode Settings
Settings
Icon
Description
Turning on the Control
Press and release the ON/OFF button. The light above will illuminate.
Setting the Ventilation
Speed
Press and release the Fan button to select LOW or HIGH fan speed. The corresponding “In-
dicator Light” will illuminate. If both LO and Hi indicator lights are off, the fan is OFF but will
turn ON if required by the Dehumidistat or remote Timer (if installed).
20/40 Mode
20 / 40
Press and release the 20/40 button. The light above will illuminate. The unit will run 20 min
on / 40 min off mode in fan defrost models and 20 min on / 40 min recirculation mode on
recirculation damper defrost models.
Table 7. Two-Speed Switch with Humidity Sensor Settings
Settings
Icon
Description
Turning on the Control
Press and release the ON/OFF button. The light above will illuminate.
Setting the Ventilation
Speed
Press and release the Fan button to select LOW or HIGH fan speed. The corresponding “In-
dicator Light” will illuminate. If both LO and Hi indicator lights are off, the fan is OFF but will
turn ON if required by the Dehumidistat or remote Timer (if installed).
Humidity Control
Your unit will reduce indoor humidity when outdoor humidity levels are lower than indoor hu-
midity levels. This feature is only effective when the outdoor temperature is below 59˚F (15˚C).
Setting the Dehumidistat
Press and release the Dehumidistat button until the Dehumidistat Light is at the desired
setting. After a few seconds the Dehumidistat light will either flash or be on continuous. A
flashing light indicates the humidity level is higher than the setting and the unit is operating
on high speed ventilation. A continuous light indicates the humidity level is lower than the
setting. The Dehumidistat will override the current speed setting to HIGH speed. The De-
humidistat function can be turned OFF by pressing the button until no Dehumidistat light is
on. Refer to the “How the Dehumidistat Works” on page 10 of this instruction for a detailed
description of Dehumidistat functionality.
IMPORTANT
Only one control can be installed on the system.
Timers will not function when mode of operation is set to “OFF”, unless specifically installed for that function. Refer to “Installing Standby
Jumper” on page 25.
Figure 5. Two-Speed Switch
with Intermittent Mode
Figure 6. Two-Speed Switch
with Humidity Sensor
Residential Energy Recovery Ventilators
11
®
