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28 49-2000492 Rev. 2
MAKE UP AIR TECHNOLOGY
Note to Installers and Inspectors: This product comes equipped with a simple installation feature that limits
maximum CFM levels in order to comply with certain local codes or regulations. This installation method may not
be necessary for all installations, please refer to your local codes for further guidelines.
CAUTION
Appliance must be disconnected from main power prior to performing the conversion
instructions listed below. Failure to do so could result in personal injury or damage to the product.
To modify unit (if needed for local codes):
390CFM or 290CFM
By design, the maximum blower speed is greater than
400 CFM. For local codes requiring reduced CFM,
modify the wiring as described below:
1. Remove the filters.
2. Remove the control board box cover.
3. Locate the motor harness plugged into the control
board.
4. A -
For a maximum of 390 CFM
Unit can operate with 4 speeds
(Low, Medium, High, Boost).
1. Disconnect the connector of the blue wire
from the red wire.
2. Connect the 2 red wires together.
B -
For a maximum of 290 CFM
Unit can operate with 3 speeds
(Low, Medium, High).
Disconnect the connector of the blue wire from
the red wire.
NOTE: Boost speed will be disabled. Unit will
operate Low, Med & High only.
5. Reattach the control board box cover and install
Filters, see Filters section.
Note to Inspectors: To verify this product was
installed in either configuration, check motor wiring
connections as described above.
Blue
Red
Red
Motor Harness
Motor Pin
Control Box
Control Box Cover
Motor Harness
Connector
Installation Instructions
INSTALLATION INSTRUCTIONS
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