EWC Controls ULTRAZONE MRK Application Note page 2

Model MRK
- Motor Actuator Replacement Kit
(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.
WASHERS
ND/ND2
ANTI-ROTATION
BRACKET
Anti-Rotation
Figure 3: ND/ND2
POSITION
BLADE SHAFT
SLOT VERTICALLY
SHAFT ADAPTOR-
URD/ND MATING
ACTUATOR/BRACKET
ASSEMBLY
Figure 4: URD Motor Actuator Replacement Assembly
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-635-8646
2
MA-ND3
1/2" SELF-
TAP SCREWS
Bracket Assembly
ADAPTOR
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.
SHAFT
DAMPER BLADE SHAFT
**ACTUATOR CLAMP NOT SHOWN FOR CLARITY
E-Mail- info@ewccontrols.com
URD
DAMPER
MOUNTING
BRACKETS