MA-ND3
WASHERS
Figure 3
: ND/ND2
Bracket Assembly
Anti-Rotation
(Continued from previous page)
-Using 1/4” nut driver, Insert 1/2” self-tapping
screws into proper holes and tighten.
-Follow instructions for
Replacing Motor
Actuator
for ND/ND2 on Page 3 and 4.
REPLACING MOTOR ACTUATOR
MODEL URD STYLE DAMPERS
(Figure 4)
-Remove the four (4) phillips head screws holding
the existing motor actuator to the damper.
-Pull the existing motor actuator straight off.
-Using the
Manual Gear Release
on the New
Actuator/Bracket Assembly, position the Actuator
Clamp to the far LEFT. (OPEN Position)
-Loosen the nuts on the
V-bolt
so the Shaft
Adaptor will slide thru easily.
-On the URD damper, position the slot on the
Damper Blade Shaft
vertically and insert the
URD/ND mating end of the
Shaft Adaptor
fully
into the
Damper Blade Shaft
.
-Align Actuator/Bracket Assembly and mounting
holes with
Shaft Adaptor
and mounting brackets.
-Insert Philips head screws thru mounting
brackets into the Anti-Rotation Bracket and
tighten.
-Using a 5/16” nut driver, tighten the
V-bolt
to the
Shaft Adaptor.
-Reconnect wiring.
Figure 4
: URD Motor Actuator Replacement Assembly
ACTUATOR/BRACKET
ASSEMBLY
URD
DAMPER
DAMPER BLADE SHAFT
SHAFT
ADAPTOR
POSITION
BLADE SHAFT
SLOT VERTICALLY
SHAFT ADAPTOR-
URD/ND MATING
MOUNTING
BRACKETS
ND/ND2
ANTI-ROTATION
BRACKET
1/2” SELF-
TAP SCREWS
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-635-8646 E-Mail- [email protected]
2
Model MRK
- Motor Actuator Replacement Kit
**ACTUATOR CLAMP NOT SHOWN FOR CLARITY
