5
MM21036A/MM22036A INSTALLATION GUIDE
OFFSET
OFFSET sets the dancer pot wiper position at which the motor
begins to run. This is expressed as the angle of the wiper
relative to its fully CCW position. With these controls, the of-
fset of the wiper may be set as high as 290° before the motor
will run. To calibrate OFFSET:
1.
Set the dancer wiper to the desired offset position.
2.
Apply line voltage.
3.
Adjust the OFFSET trimpot until the motor shaft just
begins to rotate. Back off the adjustment slightly until the
motor has stopped rotating.
MINIMUM SPEED (MIN SPD)
The MIN SPD setting determines the motor speed at the point
when the OFFSET trimpot allows the motor to run. It is factory
set for zero rated speed.
To calibrate, set the MIN SPD trimpot full CCW. Set the
dancer potentiometer to the point where the motor just begins
to rotate. Adjust the MIN SPD trimpot until the desired
minimum motor speed is reached.
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 5