Maer Fan Removal
1) Turn off miner load following site preferences
2) Leave fans running for at least 10 minutes to fully cool down miners
3) Use HMI controller to turn off fans
4) Turn off the individual fan breaker for the fan that will be removed
5) Remove the back of fan from assembly housing
From inside the container, remove the (4) 13 mm bolts holding the protection cage. A second person will have to hold the nut (13 mm) from the outside of the container through the louvers. Be sure to keep track of all washers and hardware
6) From the outside through the louvers, remove the 2 screws securing the junction box lid.
7) Ensure power to the fan is disconnected using a multimeter
8) Take note of or photo of all wire connections and remove the wires connected to the motor. Be sure to note the jumper wire connections (small black wires).
9) Remove the 2 screws holding the junction box to motor. This allows the motor to slide out easier as the junction box can be rotated now.
10) Remove the weatherproof cable gland using a crescent wrench or channel locks
11) Before removing the motor, the best practice is to number the blades AND THE positions on the motor 1 through 5. Then remove the blades.
Note the direction AND the numbering. EX: Clockwise or counterclockwise
12) Remove motor from mount
Remove the 4 bolts (17 mm) mounting the motor to the outside of the housing. Have a second person hold the motor from the inside while these bolts are removed. The motors are approximately 60 lbs. Remove the motor from the fan assembly.
13) Install blades to new motor IN THE SAME direction and order (clockwise or counterclockwise) as numbered in Step 11 above.