NOTE: When using insulated flex duct, it is recommended that the inner vinyl core be screw clamped or taped to the inlet and outlet and that the vapor barrier surrounding the insulation be taped to the fan housing.
NOTE: When attaching flex duct to the collar/damper combination and an immediate elbow is necessary, be certain that the elbow is installed with a "soft" bend to allow damper blades to operate properly.
SECTION 7
Installing Optional Balancing Damper
Some kits include an optional balancing damper to allow for adjustment of the system. The damper may be used where the grills will be connected using branches of unequal length or where the flow will need to be balanced for any reason. To Install the optional damper:
1.The damper must be installed on the branch with the least restriction. This is generally the duct that is shortest or has the fewest bends.
2.Drill a 5/16" hole approximately
3.Insert the shaft of the damper into the hole drilled in step 2. Place the washer, handle, then wing nut onto the shaft (Figure 8).
Wing Nut
Screws
Terminal Box
Figure 9
2.Run wiring from an approved wall switch carrying the appropriate rating. One neutral (white) and one hot (black lead connected to the switch). Secure the electrical wires to the housing with an approved electrical connector. Make sure you leave enough wiring in the terminal box to make the connections to the fan’s
3.Insert the white wire from the house into the terminal strip port labeled “N” and tighten using a small regular screwdriver. Insert the black wire from the wall switch into the terminal strip port labeled “L” and tighten using a small regular screwdriver. Since the motor is isolated within a plastic housing, grounding is not necessary (Figure 10).
Supply from house |
Washer
Handle
White |
Hole
Shaft
Blue |
N |
Black |
L |
Damper
“Y” Transition 
Figure 8
4.Adjust the damper to balance airflow and tighten the wing nut to secure.
SECTION 8
Wiring the Fan
CAUTION: MAKE SURE POWER IS SWITCHED OFF AT SERVICE PANEL BEFORE STARTING INSTALLATION.
CAUTION: ALL ELECTRICAL CONNECTIONS MUST BE MADE IN ACCORDANCE WITH LOCAL CODES, ORDINANCES, OR NATIONAL ELECTRICAL CODE. IF YOU ARE UNFAMILIAR WITH METHODS OF INSTALLING ELECTRICAL WIRING, SECURE THE SERVICES OF A QUALIFIED ELECTRICIAN.
1.Remove the screws securing the terminal box cover plate located on the side of the motor (Figure 9).
Red | Brown | Black/Red |
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|
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Figure 10 |
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4.Check to make sure all wire connections are securely fastened to the terminal strip and replace the fan terminal box cover.
5.Restore power and test your installation.
SECTION 9
Use and Care
CAUTION: MAKE SURE POWER IS SWITCHED OFF AT SERVICE PANEL BEFORE SERVICING THE UNIT.
1.Cleaning the Grill: Remove grill and use a mild detergent, such as dishwashing liquid, and dry with a soft cloth. NEVER USE ANY ABRASIVE PADS OR SCOURING POWDERS. Completely dry grill before reinstalling. Refer to instructions in Step 2 of Section 4, to reinstall grill.
2.The fan’s bearings are sealed and provided with an internal lubricating material, no additional lubrication is necessary.
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