Titus FFD/FFDR/FFDRA - Manual (Page 11)

I N S T A L L A T I O N & O P E R A T I O N M A N U A L
FFD, FFDR, FFDRA Models
Fan Filter Unit IOM
Installation & Operation 10
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
Service: FFDRA Motor Removal and Installation
WARNING
ELECTRICAL SERVICE SHOULD ONLY BE PERFORMED
BY A LICENSED OR QUALIFIED ELECTRICIAN
Note: Minimum 2 person project.
Tools Required: 3/16 Ball Driver, Phillips screw bit, Head Driver, Battery Operated Drill, (2) 8” adjustable wrenches, 10 mm
hex head wrench, #2 standard screwdriver, and slip joint pliers.
Step 1. To gain access to the motor, remove the gel seal filter.
Step 2. Prior to removing motor/blower assembly, remove blower wheel to expose motor connectors on motor. Using an
adjustable wrench loosen the two set screws that attach the blower wheel to the motor shaft. Disconnect the two brown wires from
the capacitor, using a pair of pliers. Disconnect the motor wiring from the rotary switch and rocker switch or speed control and rocker
switch and remove the grommet from the motor leads. Save this grommet for reinstallation.
Step 3. While supporting the motor blower assembly from below, remove the six screws on the underside of the venturi ring
and lower the assembly. (See Figure 7). Note the baffle does not have to be removed to remove the motor/blower assembly.
Step 4 . Before removal of the motor mount bracket, measure the precise location of the bracket on the motor. Remove the
bracket.
Step 5. Replace with the new motor and reassemble by reversing the above steps. Set the location of the motor mount
bracket as measured (see above Step 6). Set the spacing at 0.25” (6.35 mm) clearance between the blower and the upper
motor plate/prefilter frame creating a 0. 1” (2.80 mm) overlap between the wheel and the venturi ring. When reinstalling the
assembly, align the plate to insure that the leads will reach the electrical box.
11
Motor/Electrical Removal
Motor Assembly
Plenum
Electrical connectors
located in inner
prefilter wall
Motor/Blower
Assy
Baffle Assembly
Gel Seal Filter
Screen
Blower
Wheel
Wellnut
Venturi
Ring
Motor
Machine Screw
and washer
Grommet