Bray 70-0122-113E0-536, Руководство по эксплуатации и обслуживанию

Страница: 7 / 16

BRAY Series 70 Tunnel Damper Electric Actuator
Operation and Maintenance Manual
5
NOTICE
The conduit connections must be properly sealed to
maintain the weatherproof integrity of the actuator
enclosure.
CAUTION
Do not reverse motor instantaneously when it is still
running. Reversing direction to actuator motor when
it is running can cause damage to motor, switches and
gearing. Directional control switching can be done
by PLC in 20ms or by a small relay in 46ms. Therefore
time delay of 1s has to be incorporated into the control
scheme to avoid damage.
t
ravel
l
iMit
s
Witch and
M
echanical
t
ravel
s
tOP
a
djustMent
CAUTION
The electrical travel switches must be set to activate
(depress) prior to reaching the mechanical travel stops.
The cams are color coded (green for CCW, red for CW).
NOTE: Manual travel stops are designed to prevent
manual overtravel from turning the handwheel, not to
stop the electric motor. The travel stops have an adjust-
ment range of approximately 10-degrees.
c
lOckWise
t
ravel
s
Witch adjustMent
1. Loosen the mechanical stop for the CW position and
back it off so that it does not interfere with actuator
travel (CW stop located on right when viewed from
travel stop side of actuator).
2. Reference the striker bar for damper position.
3. Manually operate the actuator handwheel clockwise
until the valve reaches the desired fully CW position.
4. Rotate the red adjusting knob by hand or with a flat
head screwdriver until the cam lobe just activates
(depresses) the switch from a clockwise direction.
NOTICE: All actuators have a cam locking screw. Cam
locking screw must be slackened before cam adjust-
ments and re-tightened after cam adjustments.
NOTE: It is possible that the rotation of one cam will
move the other cam. If this occurs, hold the other
knobs or cams during adjustment.
5. With the travel switch in the CW position, rotate
the handwheel clockwise 1 turn for Housing Size
12 and ½ turn for Housing Size 30. Adjust the CW
travel stop bolt until it bottoms against the output
gear and lock it in position with the locknut.
6. After all travel switch adjustments have been com-
pleted, secure the actuator cover.
!
!
Striker Bar
UPPER GREEN
“CCW” CAM
LOWER RED
“CW” CAM
CAM ADJUSTMENT KNOB
(ONLY ADJUST IF LOCKING
SCREW IS SLACKENED)
CAM
LOCKING
SCREW