model 690NT
installation
1.Disconnect the electrical power supply and lock out the service panel for the existing fan.
2.Remove the grille from the existing fan.
spring
grille
Pull grille down to expose two springs. Squeeze each spring together and pull down again to release springs from motor plate slots.
-- D-Housing fan only --
3.Remove blower assembly from existing fan.
motor plate
side of housing
tab 
Unplug motor cord from receptacle. Find the single tab on the motor plate. Push up on motor plate near tab while push- ing out on side of housing. Or insert a
When motor plate tab disengages from housing slot, pivot blower assembly down and out.
Page
-- 690 series fan only --
3. Remove blower assembly from existing fan.
screw
side of |
|
housing | motor plate |
Unplug motor cord from receptacle and remove screw located next to receptacle. If necessary, insert a
Pivot blower assembly down and out.
4. Check existing housing.
Vacuum the interior of the existing fan housing with a dusting brush attachment. Examine the housing to make sure it is securely fastened to the building structure and free of any holes caused by corrosion. The receptacle must be intact. If any damage is found, do not continue installation of this product. Contact a qualified person(s) for repair.
5. Compare old and new motor plates.
One of the two new motor plates is the same size as the motor plate from the existing fan. Use this motor plate in step 6.