26
Rockwell Automation Publication MM-IN001B-EN-P - February 2022
Kinetix MMA Asynchronous Main Motors Installation Instructions
Space Heater Terminations
Space heaters provide protection against excessive moisture and condensation that could form in the motor when temperatures are lower than the dew point. Motors that
are equipped with an optional space heater, are connected to the terminal strip, in the motor terminal box.
Using the Space Heater
General guidance for space heater use:
•
The motor must be powered off.
•
The ambient temperature and the degree of humidity in the air has the possibility to generate condensation.
•
The ambient temperature is below 15°C (59°F), typically run space heater for 4…12 hrs.
•
Use the space heater within 24 hours before the motor startup.
•
Turn off the space heater before performing motor startup procedures.
•
It is recommended to wire a contactor or manual switch to control space heater power.
A switch allows the power to be turned on/off without disconnecting wires from the motor terminal board.
Space heater terminations have a protective cover that is securely attached to the terminals to help prevent accidental user contact with high voltage. Space heater
terminations are labeled with the appropriate voltage and wattage of the installed motor heater.
Wiring the Blower Terminal Box
Follow these instructions to wire the blower terminal box. See
Blower Specifications, Replacement, and Repositioning on page 48
for more blower information and wiring
diagrams.
1.
If you removed the blower assembly during motor installation or mounting, reattach the blower subassembly.
See
Blower Specifications, Replacement, and Repositioning on page 48
for instructions and additional blower specifications.
ATTENTION:
During the operation of the motor, the heaters must be switched off (not powered).
To determine which voltage to apply to the space heater see the
Catalog Number Explanation (cont.) on page 5
and the
. Thermal sensors with catalog numbers E…H are 110V AC; catalog numbers J…M are 220V AC.
Table 19 - Space Heater Specifications
Motor Cat. No.
Power (Watts)
Thermal Sensor Cat. No. Terminal Board Layout
MMA-B080
xxx
30
E…M
(1)
(1)
Thermal sensors with catalog numbers E…H are 110V AC; catalog numbers J…M are 220V AC.
MMA-B100
xxx
30
MMA-B132
xxx
40
MMA-B160
xxx
50
MMA-B180
xxx
60
MMA-B225
xxx
70
WARNING:
Hazard of personal injury or equipment damage is possible. Consider all applicable local, national, and
international codes, standards, regulations, or industry guidelines.
ATTENTION:
Check that the cables are well tightened to the terminal board. Appropriately size and tighten wire
terminals. Failure to do so can cause operating irregularities and overheating on the conductor and the terminal
board, with consequent danger or damage to the plant and to the motor. Follow the instructions pertaining to the
electromagnetic compatibility and to the type of cable to use, as supplied by the inverter manufacturer.
Space heater
(SH80-SH100)
Space heater
(SH132-SH225)
