Broan 40355, 40455, and VT9W Wall Controls: Installation and Owner Guide

Wall Control Compatibility

Refer to the wall control compatibility chart included with this wall control.

Wall Control Installation

WARNING: It is recommended to wear safety glasses and gloves while performing these instructions. Always disconnect the unit before making any connections. Failure to disconnect power could result in electric shock or damage to the wall control or electronic module inside the unit.

CAUTION: Failure to comply with the following can cause erratic operation of the unit and/or the wall control:

Never install more than one X-TOUCH main wall control per unit.
Make sure that the wires do not short-circuit between themselves or by touching any other components on the wall control. Avoid poor wiring connections.
To reduce electrical interference (noise) potential, do not run wall control wiring next to control contactors or near light dimming circuits, electrical motors, dwelling/building power or lighting wiring, or power distribution panel.

Unplug the ventilation unit from power source.
Cut a 2 7/8" x 1 3/8" hole in a wall, at a convenient location for the wall control. Route the cable from the unit to this hole. (Note: Dimensions shown are for an installation without wall box.)
Temporarily place the switch over the hole and mark both mounting screw hole positions. Remove the switch, drill both screw holes (3/16" Ø) in wall and insert wall anchors (included).
Strip the end of the cable to access the 4 wires. Strip the end of each wire.
Using a small blade screwdriver, connect each wire to its corresponding terminal on the back of the wall control: Yellow wire to "Y", Black wire to "B", Red wire to "R", and Green wire to "G".
Mount the wall control to the wall.
Plug the ventilation unit and test the wall control operation.

Wall Control Use

Backlight

If the backlight is not illuminated, pressing on MODE, % HUM or TURBO key will activate it. The backlight remains illuminated for 10 seconds after the last key is pressed (no matter the key).

Operating Modes

NOTE: If the backlight is not illuminated, press on any key to activate the wall control.

Press the MODE key to choose the operation mode of the ventilation unit (except TURBO MODE). The operating mode will then appear on the LCD screen (STANDBY, RECIRC, 20 min/h, CONT, SMART).

STANDBY: Puts the unit on standby mode, so it will only respond to override wall controls (if present). On LCD screen, only the house is visible showing the control is powered on. This is the factory set default mode.
RECIRC: Air is recirculated inside the house on high speed.
20 min/h: The ventilation unit exchanges air intermittently on a one hour cycle as follows: OFF for 40 min. (or recirculation for 40 min. on low or high speed) and then exchange air during 20 min. on low speed. Repeat cycle after the 20 min. of air exchange.
CONT: Air is exchanged with the outdoors at the minimum blower speed.
SMART: Air exchange is managed according to indoor humidity measured by the wall control and outdoor temperature. In SMART mode, the SMART icon appears as well as the current operating mode called by SMART.

SMART Mode Operation Examples:

TURBO Mode called by SMART Mode: The unit operates on high speed.
CONT Mode called by SMART Mode: The unit operates on low speed.
20 min/h Mode called by SMART Mode: The unit operates on intermittent cycles.
ECO Mode called by SMART Mode: The unit is set to standby for 50 minutes (or in RECIRC mode for 50 minutes) and then exchanges air during 10 minutes on low speed. This mode is exclusively activated by SMART mode.
STANDBY Mode called by SMART Mode: The unit is on standby.

The chart below shows the operating modes called by SMART mode, according to the indoor humidity percentage and the outdoor temperature.

Chart Description: A graph showing different operating modes (TURBO, CONT, 20min/h, STANDBY) based on Indoor Humidity Level (%) on the Y-axis and Outdoor Temperature (°C) on the X-axis. The graph is divided into zones indicating which mode is active for different combinations of humidity and temperature.

Functions

Turbo Function

Press the TURBO function key to turn the unit on air exchange in high speed during 4 hours, then, the unit will get back to its previous operation mode. The TURBO icon is flashing during the 4-hour cycle. To exit this function before the end of its 4-hour cycle, press on TURBO or MODE key; the unit will get back to its previous operation mode.
Press and hold the TURBO function key during 3 seconds to turn the unit on air exchange in high speed continuously. The TURBO icon appears and stays continuously. To exit this TURBO mode, press on TURBO or MODE key; the unit will get back to its previous operation mode.

Dehumidistat Function

The Dehumidistat function has been created to manage indoor relative humidity excess. When the actual home relative humidity percentage (RH%) detected is over the set value, "drops" appears on screen and the control overrides the current mode, turning on the unit on high speed exchange until the indoor relative humidity % set is reached. The unit then returns to its previous operation setting. Refer below to find out how to set the indoor relative humidity %.

How to Enable and Disable the Dehumidistat Function:

In all modes except STANDBY and SMART, press the % HUM key to enable the Dehumidistat function. The actual home RH% level appears on screen (enabled).
Press once more on the % HUM key to disable the Dehumidistat function. The actual home RH% level disappears from screen (disabled).

How to Set the Indoor Relative Humidity (RH %) Level:

Press and hold the % HUM key for 3 seconds. The actual RH% level appears on screen. Default value: 44%. Lower value: 30%. Higher value: 56%.
Press the % HUM key to change the value. The value changes by 2% increments.
To exit this setting menu, press and hold the % HUM key for 3 seconds or wait 10 seconds.

Settings

How to set the unit operation in the remaining 40 minutes on 20 min/h mode and how to set the unit defrost cycle type

Press and hold the MODE key for 3 seconds. The LCD screen will show one of these configurations:

Standby (Default configuration setting): A small triangle and two lines flash.
Recirculation on Low Speed: The recirculation arrows turn while the small triangle and RE flash, CONT label appears.
Recirculation on High Speed: The recirculation arrows turn while the small triangle and RE flash, TURBO label appears.

Use MODE or TURBO key to see all 3 configurations. Press % HUM key to accept chosen configuration and go to setting defrost cycle type.

The LCD screen will show one of these defrost cycle types:

Sd (Standard) (Default cycle setting): "Sd" appears over snowflake icon. When needed, the unit will perform defrost cycle on high speed. NOTE: This is the defrost type used for the data published by HVI and ENERGY STAR®.
PL (Plus): "PL" appears over snowflake icon. Use this cycle in cold regions (outdoor temperature -27°C [-17°F] and lower). When needed, the unit will perform defrost cycle on high speed on a longer period of time.
dl (Discretion): "dl" appears over snowflake icon. When needed, the defrost cycle will be performed on the same speed than the unit ventilation speed. (E.g.: If the unit is set on TURBO, the defrost cycle will be done on high speed, and if the unit is set on CONT, the defrost cycle will be done on low speed.)

Use MODE or TURBO key to see all 3 defrost cycle types. Press % HUM key to accept chosen defrost cycle type and go to software version display.

Error Codes

Error Code	Solution
A 2-digit error code (E1, E2, etc.) is displayed on wall control screen.	Ensure that the color-coded wires have been connected to their appropriate place. Ensure that the wires are correctly connected.
A 3-digit error code (E21, E22, etc.) is displayed on wall control screen.	Press and hold simultaneously for 8 seconds on % HUM, MODE and TURBO keys to reset the wall control. The user preferences will have to be reset.
A 10-second countdown is displayed on wall control screen.	Problem with the ventilation unit. Contact your installer.
A 10-second countdown is displayed on wall control screen.	Wait until the end of the countdown, without pressing any key.

Protection Mode

This icon appears to show when the ventilation unit is in protection mode. This special mode has been created to protect the ventilation unit from specific conditions (e.g.: outdoor temperature colder than -25°C). There is no action to be taken when this icon appears, it will disappear by itself.

Maintenance Indicator

This icon flashes when it is time to perform the maintenance. Refer to the ventilation unit user guide. Once the unit maintenance is done, press simultaneously on both MODE and TURBO keys to reset the maintenance indicator. This will erase the icon from the screen.

User Setting Menu

LCD screen alternates between the house with circled arrows and the house without arrow. The numbers under the house are the software version number. Press % HUM key or wait 10 seconds to exit user setting menu.

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