Honeywell Modutrol IV M7284Q1106/U - Operation and Checkout; Operation; Checkout Procedures; Motor Operation Checkout

SERIES 72 MODUTROL IV™ MOTORS
11 Based on 63-2640—08
F
F
.)
1/8 INCH
MOVE SCREWDRIVER AT
TOP ONLY TO ADJUST CAM.
NOTE: CAMS ARE OFFSET
VERTICALLY TO PROVIDE
BETTER VIEW OF BACK CAM.
STRAIGHT-BLADE
SCREWDRIVER
SLOW RISE
PORTION
(APPROX.
10 DIFF.)
INNER
AUXILIARY
CAM
(BLUE)
RIGHT/INNER
AUXILIARY
SWITCH
FAST RISE
PORTION
(APPROX.
1 DIFF.)
LEFT/OUTER
AUXILIARY
SWITCH
FAST RISE
PORTION
(APPROX.
1 DI
MOTOR
OPEN
OUTER
AUXILIARY
CAM
(RED)
POWER
END
SLOW RISE
PORTION
(APPROX.
10 DIFF.)
MOTOR
CLOSE
LEFT/OUTER
AUXILIARY
SWITCH
POWER END
OF MOTOR
RIGHT/INNER
AUXILIARY SWITCH
INNER AUXILIARY
CAM (BLUE)
OUTER AUXILIARY
CAM (RED)
M17101
Fig. 12. Auxiliary switch adjustment.
OPERATION AND CHECKOUT
Operation
The internal shaft position feedback potentiometer in
conjunction with the actuator microprocessor and modulating
input circuit form a control loop. When the external controller’s
output remains at a fixed amplitude the actuator’s shaft position
is held at a position proportional to that input amplitude. When
the value of the external controllers output changes the
actuator responds by initiating movement of the motor to
proportionately compensate for the change in input amplitude.
When the motor reaches the control loop balance point the
system is again in a static state and the actuator holds position
until the next change of input from the external controller.
Checkout
After installation and linkage adjustment, operate the motor
through the controller. Make sure that:
• The motor properly operates the damper or valve.
• The motor responds properly as the input is varied.
• The auxiliary switch, if used, operates at the desired point of
motor rotation.
Inspect the motor, linkage, and valve or damper to see that all
mechanical connections are correct and secure.
In damper installations, the pushrod should not extend more
than a few inches past the ball joints. Check to see that there is
adequate clearance for the linkage to move through its stroke
without binding or striking other objects.
See controller or system instructions for additional checkout
procedures.
Motor Operation Checkout
For motors with F, + and - terminals:
To close the motor, open terminals +, -, and F.
To open the motor connect terminal F to positive (+) or
negative (-).
NOTE: DO NOT SHORT + to -