Fatpa direct drive series instructions – Greenheck MSxx04 & MSxx09 Series External (477252) User Manual
Page 2

Figure 2: MS Series wiring illustration.
FATPA DIRECT DRIVE SERIES
INSTRUCTIONS
These installation instructions assume the damper is 
already mounted in a duct or sleeve with the damper 
shaft extending beyond the duct or sleeve 6 inches 
(152mm).
 1. Install the stand-off bracket
Dampers with a jackshaft
1a. Remove the 1/2 in. (13mm) ball bearing from the
standoff bracket. Mount the stand-off bracket (item 
#7) with [4] 1/4-20 x 1/2 in. (M6 x 12mm) spinlock 
bolts and nuts (item #4 and 5). Orient the stand-off 
bracket (item #7) so the hole is centered on the 
jackshaft (see Figure 1, With Jackshaft).
Dampers without a jackshaft (Shaft Extension)
 1b. Mount the stand-off bracket (item #7) spanning 
across the damper frame flanges. Fasten to the 
damper frame with [4] 1/4-20 x 1/2 in. (M6 x 12mm) 
spinlock bolts and nuts (item #4 and 5). Be sure not 
to run the screws into the damper linkage, which is 
between the flanges.
2. Mount actuator bracket
 Fasten the actuator bracket (item #1) (See Figure 
1) to the standoff bracket (item #7) using [4] 1/4-20 x 
1/2 in. (M6 X 20mm) spinlock bolts and nuts (item #4 
and 5). Use outer four holes of the actuator bracket 
(item #2).
3. Fail Position
 If fail position is closed, make sure damper 
blades are fully close and ensure blade seals are 
compressed prior to tightening the actuator clamp 
to the damper extension pin or jackshaft.
4. Install the actuator
Install the actuator (item #6) over the damper drive
shaft and tight against the actuator bracket (item 
#1). Install [1] #10-24 x .375 shoulder bolts (item #2) 
through lugs on actuator and through the holes in 
back of the actuator bracket (item #1). Secure with 
[2] #10-24 nuts (Item #5) (See Figure 1).
5. Secure actuator (Item #6) to drive shaft by
tightening the set screws on actuator collar.
6. The wiring illustration identifies actuator electrical
requirements and connections (See Figure 2). 
Wiring must comply with all applicable electrical 
codes.
7. Apply power to the actuator. The damper blades
should fully open or close and return to the fail 
position when power is disconnected. 
M34624
24 VAC
BLACK
RED
GREEN
L1 ( )
L2 ( )
YELLOW
YELLOW
BLUE
7° AUXILIARY
SWITCH
85° AUXILIARY
SWITCH
BLUE
24 VAC wiring diagram
120 VAC wiring diagram
230 VAC wiring diagram
WHITE
BLACK
GREEN
L1 ( )
L2 ( )
YELLOW
YELLOW
BLUE
BLUE
7° AUXILIARY
SWITCH
85° AUXILIARY
SWITCH
120 VAC
M34625
M34626
BLUE
BROWN
GREEN
230 VAC
L1 ( )
L2 ( )
YELLOW
YELLOW
BLUE
BLUE
7° AUXILIARY
SWITCH
85° AUXILIARY
SWITCH
2
