model 690NT
Page
iNsTallaTioN
GRILLE
TAB
SIDE OF HOUSING
mOTOR PLATE
1. disconnect the electrical power supply and
lock out the service panel for the existing fan.
2. remove the grille from the existing fan.
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.
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 straight-blade screw-
driver into slot in housing next to tab and twist screwdriver.
When motor plate tab disengages from housing slot, pivot
blower assembly down and out.
SPRING
-- 690 series faN oNly --
3. remove blower assembly from existing fan.
Unplug motor cord from receptacle and remove screw located
next to receptacle. If necessary, insert a straight-blade screw-
driver between motor plate and side of housing near the screw
location and gently pry housing away from motor plate.
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.
SCREW
SIDE OF
HOUSING
mOTOR PLATE
