2. Program the remote transmitter by cycling the power to the WHF off and on (unplugging and plugging in the power cord) or by pressing remote reset button

- A red LED on the control board will begin to flash indicating that the control board is ready to mate with your remote transmitter

- Press any button on the hand held transmitter

- The red LED will blink off

- Your WHF is now ready to use

3. Repeat this process to program additional remote transmitters

All AirScape models, except the Kohilo 2.8, use low voltage controls (24 volt) to turn the unit on/off and switch between high and low speed. Never wire line voltage to your wall switch.

Run 18-22 gauge wire (x3) from the WHF to the wall switch location. Attach the 3 wires to the control board at the screw terminals COM RED, START BLK, and HI SPD BLU/WHT.

Connect the 3 wires to the wall switch (see below). We have pre-wired wire leads to the wall switch to indicate the wire locations. The wire leads correspond to the control board as follows: RED to COM RED, BLACK to START BLK, and WHITE to HI SPD BLU/WHT.

Related Posts: CORRECTLY WIRE YOUR WALL SWITCH

This is a brief reminder of the proper location for wiring the wall switch to your AirScape control board. We have noticed that sometimes people, even licensed electricians, wire the wall switch to the auxiliary actuator terminal (red crossed out circle). Wiring at this incorrect location will blow the 3 amp circuit breaker on your unit and possibly damage your control board. Regardless of your experience level we recommend looking at the wiring diagram in the instruction manual before wiring the wall switch. The correct wiring location is indicated by the green circle with check mark.

Related Posts: HOW TO WIRE THE WALL SWITCH

The newest version of our control board has a master override or interlock. The interlock, which is now required by some building codes, effectively disables the WHF by closing the damper doors and turning off the fans. It is often used in conjunction with smoke detectors or mechanical systems located in the attic. The idea is that if the furnace turns on or the smoke detector goes off the WHF will shut down. This could slow down the spread of a fire or save $$$ if the furnace was accidentally turned on.

The interlock is integrated into our 24v digital controls on V4 of our control board. To use the interlock simply remove the two-pin shunt and run low voltage wire from the interlock screw terminals to the relay on the device that will disable the WHF. To activate the interlock the relay should interrupt the 24v current. Do not wire 120v to the interlock.

When activated a solid red LED will illuminate on the WHF control board. The fans will turn off and the damper doors will close. Once the interlock is disengaged, the LED will go out. The WHF can be restarted by flipping the wall switch off and on again or by using your remote.

The control board has had several different incarnations over the years. Please take a look at the photos below and identify your control board before you call tech support.

My control board looks most like: 1, 2, 3, 4, 5 or 6 (Differences between 3 and 4 circled in red)

1 2

3 4

56

This summer we came out with the newest version of our WHF control board. The new control board has several new features which improve on the previous versions. It is now being phased into all AirScape models in production. The following are some of the improvements/changes made to the control board:

One of the biggest changes is how the actuator is controlled. The actuator(s) will now cycle the damper doors open before the fans turn on. We have also added LED indicators which indicate operation of actuator(s) and fan speeds. Programming your optional remote has become even easier with the new control board. Now all you have to do to mate your remote transmitter to the WHF is to turn the main power to the unit on and off by unplugging and plugging in the damper box power cord or turning the circuit breaker off and on at the electrical panel. We also added the ability to reset the remote programming as well.

Now, for all of the contractors or advanced users out there we added something for you too. The control board now has a master override or interlock. This is a safety switch that when enabled will turn off the fan(s) and close the damper doors. The interlock is now required by some community building codes to disable the whole house fan if for example a furnace turns on or a fire alarm is triggered. Please see future tech support blogs or give us a call for more information on the interlock.