Honeywell Modutrol IV Series 61 Manual page 9

Setting Stroke at 90° or 160°
1. Adjust the trim potentiometer:
a. For 160° stroke, turn fully clockwise.
b. For 90° stroke, turn fully counterclockwise.
2. Drive the motor to the mid-position as follows:
a. For models with an internal transformer (line voltage
motors), connect a jumper across terminals R and 2
to drive motor open (clockwise, as viewed from
power end), or across terminals R and 1 to drive
motor closed (counterclockwise) until motor reaches
mid-position.
b. For models with no internal transformer (low voltage
motors), connect 24 Vac across terminals 2 and 3 to
drive motor open (clockwise, as viewed from the
power end), or across terminals 1 and 3 to drive
motor closed (counterclockwise) until motor reaches
mid-position.
3. Insert 1/8 in. screwdriver blade into a slot on inner cam
and proceed as follows:
a. For 90° stroke: Move the screwdriver top as far as
possible counterclockwise (viewed from the power
end).
b. For 160° stroke: Move the screwdriver top as far as
possible clockwise (viewed from the power end).
See Fig. 10. Repeat in successive cam slots until the
inner cam is against the stop.
NOTE: For low torque motors (75 lb-in. or less), omit
step 4 and proceed to step 5.
4. Insert 1/8 in. screwdriver blade into a slot on outer cam
and proceed as follows:
a. For 90° stroke: Move the screwdriver top as far as
possible clockwise (viewed from the power end).
b. For 160° stroke: Move the screwdriver top as far as
possible counterclockwise (viewed from the power
end).
See Fig. 10. Repeat in successive cam slots until the
outer cam is against the stop.
5. Check the motor stroke before connecting the linkage.
6. Reconnect the controller, replace the motor top cover
and attach the linkage to the motor.
Setting Stroke Between 90° and 160°
1. Adjust the trim potentiometer fully clockwise.
2. Drive the motor to the mid-position as follows:
a. For models with an internal transformer (line voltage
motors), connect a jumper across terminals R and 2
to drive motor open (clockwise, as viewed from
power end), or across terminals R and 1 to drive
motor closed (counterclockwise) until motor reaches
mid-position.
b. For models with no internal transformer (low voltage
motors), connect 24 Vac across terminals 2 and 3 to
drive motor open (clockwise, as viewed from the
power end), or across terminals 1 and 3 to drive
motor closed (counterclockwise) until motor reaches
mid-position.
SERIES 61 AND SERIES 62 MODUTROL IV™ MOTORS
3. Insert 1/8 in. screwdriver blade into a slot on inner cam
and move the screwdriver top as far as possible
clockwise (viewed from the power end). See Fig. 10.
Repeat in successive cam slots until the inner cam is
against the clockwise stop.
4. Drive the motor to the fully-open position as follows:
a. For models with an internal transformer (line voltage
motors), connect a jumper across terminals R and 2
until the motor reaches the fully-open position.
b. For models with no internal transformer (low voltage
motors), connect 24 Vac across terminals 2 and 3
until motor reaches the fully-open position.
NOTE: The motor should now be in the 90° position.
IMPORTANT
During step 5, allow the motor to reposition after
each move of the cam.
5. Insert 1/8 in. screwdriver blade into a slot on inner cam
and move the screwdriver top slowly clockwise (viewed
from the power end). Repeat this procedure until the
motor reaches the desired fully-open position.
NOTE: Each click of the cam provides approximately 2
degrees of rotation.
IMPORTANT
If the motor turns past the desired position, do not
move the cam.
6. If the motor turns past the desired position, drive the
motor to mid-position, then move the cam clockwise to
the stop and repeat steps 4 and 5.
NOTE: Drive the motor to mid-position as follows:
a. For models with an internal transformer (line voltage
motors), connect a jumper across terminals R and 2
to drive motor open (clockwise, as viewed from
power end), or across terminals R and 1 to drive
motor closed (counterclockwise) until motor reaches
mid-position.
b. For models with no internal transformer (low voltage
motors), connect 24 Vac across terminals 2 and 3 to
drive motor open (clockwise, as viewed from the
power end), or across terminals 1 and 3 to drive
motor closed (counterclockwise) until motor reaches
mid-position.
7. Once the desired position is reached, set the electrical
stroke limit:
a. Slowly adjust trim potentiometer counterclockwise
until the motor starts to move.
b. Stop and turn trim potentiometer 1/8 turn clockwise.
NOTE: This last adjustment ensures total motor
movement over the full range of the controller.
8. Check for proper electrical stroke setting by opening the
W lead. The motor should not move.
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