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N20, N34 SERIES CN7220, CN7234
Manual Adjustment
IMPORTANT
In order to prevent equipment damage, you must
remove power before manual adjustment.
After removing power, the gear train can be disengaged using
the declutch button, permitting the actuator shaft to be manually
rotated to any position. The feedback signal will then follow the
new position.
Limitation of Rotation Stroke
Two mechanical end limits (adjustable in 3° increments) are
provided (20 Nm [177 lb-in] models, only) to limit the angle of
rotation as desired (see Fig. 7).
Fig. 7. Mechanical end limits
The mechanical end limits must be securely fastened in place
as shown in Fig. 8. Specifically, it is important that they
properly mesh with the rotational angle scales when the
screws are tightened.
Fig.8. Correct / incorrect tightening of end limits
Override
If terminal 3 of the terminal strip (see section "Wiring Diagrams"
on page 5) is unplugged, the stroke will be 0%; reversing the
rotation direction using the rotation direction switch will result in
a max. stroke of 100%. If terminal 3 is jumped with terminal 1
(24 V), the stroke will be 50%.
INSTALLATION
These actuators are designed for single-point mounting.
IMPORTANT
In order to prevent equipment damage, you must
remove power or set the rotation direction switch to
the "Service/Off" position before manual operation.
Mounting Instructions
All information and steps are included in the Installation
Instructions supplied with the actuator.
Mounting Position
The actuators can be mounted in any position (no IP54 or NEMA2 if
mounted upside down; see Fig. 9). Choose an orientation permitting
easy access to the actuator's cables and controls.
IP54
IP54
Fig. 9. Mounting for IP54
Mounting Bracket and Screws
If the actuator is to be mounted directly on a damper shaft, use the
mounting bracket and screws included in the delivery package.
Self-Centering Shaft Adapter
The self-centering shaft adapter can be used for shafts having
various diameters (10...27 mm [3/8...1-1/16"]) and shapes (square or
round)
In the case of short shafts, the shaft adapter may be reversed and
mounted on the duct side.
Stroke Limitation with Mechanical End Limits
The mechanical end limits (20 Nm [177 lb-in] models, only) enable
the stroke to be limited from 0...90° in increments of 3°.
4
IP54
IP54
CN0B-0341CH33 R0407
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