NON SPRING RETURN MOTORS
E373C
FIG. 2-LIMITS OF MOTOR ROTATION.
ADAPTER BRACKET
The220738A Adaptor Bracket, positioned between the motor and the equipment, raises the shaft height ptthe- M9484 motor by 0.75 inch to match that of the M941 motor. This is required on all valve linkage applications, Q607 External Auxiliary Switch applications, and on some damper linkage applications (either to provide clearance for the crank arm to rotate through the downward position, or to allow the damper linkage to reach the shaft).
To mount the motor with the bracket:
1.Mount the bracket to the equipment with existing or standard bolts.
2.Mount the motor to the bracket using the bolts pro- vided into the threaded holes of the bracket (see Fig. 3).
For valve linkage applications, the bracket should first be mounted to the linkage (see Fig. 4). The bracket then provides a convenient base on which the motor can be positioned. After the motor shaft is aligned to the linkage, it can then be attached to the bracket with the 4 bolts provided. These bolts go through the inner set of holes in the motor flanae and into the threaded holes of the bracket.
BOLTS
PROVIDED (4)
n1 #12 OR l/4” ZINC PLATED MACHINE SCREWS OR BOLTS
M 3076
FIG. “MOUNTINGMOTOR WITH 220738A ADAPTER with standard bolts. The motor is then mounted
which thread into the threaded bracket holes.
BRACKET. The bracket is first mounted to the equipmel to the bracket using the bolts provided with the bracKet,
DAMPER LINKAGES
A 220738A Adapter Bracket is packed with replace- ment motors. Use of this bracket is optional for many damper applications but may be needed in damper appli- cations requiring the crank arm to rotate through the bottom plane of the actuator. If the bracket is not used in a replacement application, the damper linkage will have to be adjusted to the new shaft position.
The motor comes without a crank arm. The crank arm is included in the Q605 linkage or may be ordered sepa- rately (see Accessories).
For detailed instructions on the assembly of specific linkages, refer to the instruction sheet packed with each
linkage. In general, however, check the following points of operation when installing a motor and linkage.
1.Linkages for valves and louver type dampers should be adjusted so that the damper or valve moves through only the maximum required distance when the motor moves through its full stroke.
2.With modulating control, maximum damper opening should be no more than 60”. Little additional airflow is provided beyond this point.
3.The motor must be stopped at the end of its stroke by the limit switch and must not be stalled by the damper or valve. The motor will be damaged if it is not permitted to complete its full stroke.
563-2195-l
