Greenheck MS4120, MS4620, MS8120, MS7520 Series (464287) - Manual (Page 2)

Copyright © 2010 Greenheck Fan. Corporation
464287 MS4120, MS4620, MS8120 IOM
Rev. 6 Feb 2010.
Wiring Illustration
Black
White
120 Volt or
24 volt M
Wiring Illustration
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 a minimum of 6 inches (152mm).
1. Install the stand off bracket.
Dampers with a jackshaft
1a. Jackshaft supplied is typically 1 in. (25mm) diameter. For
these applications the bearing must be removed from
stand-off bracket (Item #6). Mount the stand-off bracket
(item #6) with [4] threadstuds (item #8) and [4] 1/4 - 20
spinlock nut (item 2). Orient the stand-off bracket (item #6)
so the hole is centered on the jackshaft.
Dampers without a jackshaft (Shaft Extension)
1b. Mount the stand off bracket (item #6) spanning across the
damper frame flanges. Fasten to the damper frame with [4]
#14 x 3/4 (M6 x 12mm) Tek screws (item #3). Be sure not to
run the screws into the damper linkage, which is between
the flanges.
2. Mount actuator bracket
Mount actuator bracket (item #7) using [4] thread studs
(item #8) and [4] 1/4-20 (M6) nuts (item #2).
Note: The mounting bracket (item #7) may be attached
in three positions: parallel with the duct, perpendicular
up from the duct, or perpendicular down from the duct.
Choose a position that offers the most clearance for the
application.
3. Actuator rotation
If the fail rotation of the damper is counter clockwise the
universal clamp should be on the side of the actuator
showing the power direction as clockwise rotation (usually
shipped in this orientation).
To change the universal clamp to the other side, remove
the retaining clip and then the universal clamp from the
actuator. Move the universal clamp onto the actuator. When
the clamp is installed, then lock in place using the retaining
clip.
Note: All fail rotations refer to the damper shaft rotation
needed to achieve the desire blade 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. Inspect the damper blades and the damper
shaft to determine the proper damper shaft rotation for the
desired fail position.
4. Mounting actuator
Slide the actuator (item #1) over damper drive shaft.
Install thread stud through the mounting lug on the back
of the actuator and through the corresponding hole of
the actuator bracket (item #7). Secure the thread stud to
actuator bracket (item #7) with #10-24 (M5) nut. Verify that
the damper is in its fail position. Secure actuator (item #1)
to damper drive shaft by torquing the screw on the actuator
universal clamp to 88 in. lbs. (9.9Nm).
5. The wiring illustration below identifies actuator electrical
requirements and connections. Wiring must comply with all
applicable electrical codes.
6. Apply power to the actuator. The damper blades should
fully open or close and return to the fail position when
power is disconnected.
Important
A break in power of less than one second can cause the
actuator to spring-return 5 degrees or less and remain in
place until a break in power of longer duration
.
Model Volts Running Holding
MS4120F1006
120 VAC 35W 10W
MS4120F1204
MS4620F1005
230 VAC 35W 10W
MS4620F1203
MS7510A2008
24 VAC/VDC
14W
5W
MS7510A2206 14W
MS7520A2007 16W
MS7520A2015 22W
MS7520A2205 16W
MS7520A2213 22W
MS8110A1206 24 VAC/VDC 30W 8W
MS8120F1002
24 VAC 45W 10W
MS8120F1200
Orientation of Stand Off
Bracket for a directly
driven damper
Orientation of Stand Off
Bracket for a jackshaft
driven damper