THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.
Variable Speed (ECM) Supply Air Blower
The 4100 series is factory configured for a left-to-right or right-to-left airflow. In either airflow direction, the holes directly above the air outlet on the right side of the 4100 Series MUST be contained in the duct system.(See Figure 1 for reference to these air holes.)
NOTE: When interfacing with a heat pump, the A-Coil MUST be placed on the return air side.
If a down flow configuration is desired, a down flow kit must be ordered from the factory and the system MUST be raised a minimum of 10" of the ground. An 18" stand is available to elevate the Comfort Plus as well as a easy to assemble Return Air Plenum.
WARNING
HAZARDOUS VOLTAGE: Risk of electric shock. Can cause injury or death.
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Do install ducting before energizing the system.
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Do NOT operate the Comfort Plus without ducting installed to both the air inlet and outlet.
Unbox the Assembly
Unbox the supply air blower plenum assembly.
Remove Metal Plate
Remove and discard metal plate securing supply air blower to plenum assembly.
Attach Support Bracket
Locate the plenum support bracket shipped in the plenum box. Attach the bracket to the supply air side using the blunt tip screws supplied in the plenum assembly hardware package. Refer to Figure 1 for proper positioning of the plenum support bracket.
Attach Wiring Harnesses
Attach the supply blower wiring harnesses located in the base of the system to the blower using the connections located on the ends of the harnesses. Be sure to place any excess wiring in the base of the system below the radiant heat shield. See Figure 1.
Figure 1: Supply Air Plenum Attachment
NOTE: When routing the harness to the supply air blower, the harness must route to the side of the air deflector in the bottom of the supply air blower housing.
Verify Motor is Installed Correctly
Verify that the blower is installed in the plenum with the motor facing away from the system. See Figure 2.
Figure 2:
Attach Plenum to the Comfort Plus
Attach the supply air blower plenum to the Comfort Plus by drilling two 1/8” holes per edge and using the self tapping screws supplied in the hardware package.
Connect the Ducting to the Comfort Plus
Connect both the return air and supply air ducting systems in the structure to the Comfort Plus system. Be sure the air holes just above the air outlet on the right side are contained in the duct system. (See Figure 1 for reference to the location of these holes.)
NOTE: If the Comfort Plus system is installed in a small enclosed area (less than 400 square feet), a minimum of a 24"x 24" opening must be installed into the area where the system is located. In addition, a 6" x 6" non-closing type register must be cut into the return air duct. Refer to the Placement and Clearance Requirements section for more information.
Adjust CFM Setting
Adjust the CFM setting at the variable speed low voltage circuit board as shown in Figure 3.
Figure 3:
Ensure the W/E jumper is On
The W/E jumper (Figure 3) MUST be in the ON position or the blower will not operate with an E call from the thermostat.