Broan Installation and User Guide for Automatic Control

⚠️ WARNING

Electrical wiring must be done by qualified personnel in accordance with all applicable codes and standards. Before connecting wires, unplug the unit or switch power off at service panel and lock service disconnecting means to prevent power from being switched on accidentally. Always wear safety glasses and gloves while performing these instructions.

CAUTION

If ducts have to go through an unconditioned space (e.g.: attic), always use insulated ducts to prevent condensation formation inside and outside ducts, which could cause material damage and/or mold growth. Moreover, if fresh air to building duct and/or stale air from building duct goes/go through an unconditioned space, the unit must be set to operate continuously in cold conditions (below 10°C/50°F). Continuous air movement inside ducts will prevent condensation formation. The unit can be stopped temporarily for maintenance and/or repair purposes in such conditions. (Refer to section 2.2 from unit User and Installer Manual for more details.)

INSTALLATION

1. Unplug the ventilation unit.

2. Cut a 2 7/8" x 1 3/4" hole in a wall, at a convenient location for the control. Route a cable (type 22/4) for the control from the unit to this hole. [Diagram: Shows a rectangular cutout for the control unit, measuring approximately 2 7/8 inches by 1 3/4 inches, with a cable routed to it.]

3. Temporarily place the control over the hole and mark both mounting screw hole positions. [Diagram: Shows the back of the control unit with two screw hole positions marked for wall mounting.]

4. Remove the control, drill both screw holes (3/16" Ø) in the wall and insert the wall anchors (included). [Diagram: Shows drilling 3/16" diameter holes and inserting wall anchors.]

5. Strip the end of the cable to access the 4 wires (about 3"). Strip the end of each wire (about 1/4"). Connect the wires to the terminals, regardless of the wire color. Note which wire color has been chosen for each terminal. [Diagram: Shows a control unit's terminal block with four connections labeled: 12V, D-, D+, and Gnd. It illustrates connecting wires from the ventilation unit to these terminals.] The terminals are typically labeled 12V, D-, D+, and Gnd.

6. Mount the control to the wall.

7. Perform the electrical connection to the terminal connector of the unit, as shown below. For more details, refer to the installation manual of the ventilation unit. [Diagram: Illustrates the connection of the control unit's cable to the main ventilation unit's terminal connector.]

   NOTE: To avoid miswiring, refer to the notes taken at step 5 to match the wire color with the right terminal.

8. Plug the ventilation unit and test the wall control.

HOW TO USE THE CONTROL

The main button works following this sequence:

• Click 1 = RECIRC (if available)
• Click 2 = INT
• Click 3 = MIN
• Click 4 = MED
• Click 5 = MAX
• Click 6 = OFF
• ...and so on

The indicator lights up as per the selected mode.

Mode Descriptions:

• RECIRC: Recirculate air inside the house at MAX speed. Not available on all units.
• INT: Within a one hour period, the system will operate in MIN speed for 20 minutes.
• MIN/MED/MAX: Continuous exchange ventilation at selected speed.

Special Functions:

• TURBO: Press the TURBO button to get 4 hours of ventilation in MAX speed. The TURBO indicator will light up. Once the 4-hour period is done, the system will operate according to the previous setting.

• AUTO: Press the AUTO button to let the system operate according to outdoor temperature. The AUTO indicator will light up and the system will operate as follows:

  • Less than -25°C = 10 min/hr
  • -25°C to -7°C = 20 min/hr
  • 10°C to 25°C = MIN speed
  • 25°C to 28°C = 30 min/hr
  • 28°C to 33°C = 20 min/hr
  • Above 33°C = 10 min/hr

  [Diagram: A list details the ventilation operation (minutes per hour) based on outdoor temperature ranges, from below -25°C to above 33°C.]

Maintenance and Troubleshooting:

• If the maintenance indicator is lit, it means that the filter needs to be cleaned or replaced. Once the filter is cleaned or replaced, press the AUTO button for five seconds to reset the maintenance indicator.

• If the maintenance indicator flashes, the LCD screen on the unit will give the error code. Refer to the Troubleshooting section in the ventilation unit user guide for more information.

• At unit first boot, AUTO and TURBO indicators blink alternately for about 1 minute. If indicators continue blinking after this period, it means that the communication cannot be established with the ventilation unit. Make sure wires are correctly connected to the wall control and unit terminals (refer to step 7).