Moisture inside the motor housing. Manufacturer Leroy Somer

[NEugeny]

Hello everybody!

I have a problem - the burning of the windings of two electric motors.
There is a rubber stopper on the motor housing.
The question is - should it be removed or not?
The chiller works only in the summer. A maximum of three months a year.152641526315265

[NEugeny]

first photo - the lower part of the motor.
second photo - bottom cover from the inside.
The third photo shows the top cover on the outside.
This is the electric motor of the condenser fan. Installed vertically.

[Greek_engineer]

you should seek information from manufacture company.
look for a manual with regard to this make of fan.
my opinion is that you should remove this cap from the fan.then it would be possible for excessive moisture to be drained off through this hole.

[Brian_UK]

What are the off season temperatures/conditions.

I would suggest removing the motors at the end of the cooling season and put them into dry storage prior to refitting at the next season.

If not then perhaps fit electric heaters to keep them dry.

[al]

If the rubber is on the bottom of the motor when installed then remove it. Any condenser fan motor that is off for long periods will have issues. Can you arrange for chiller to cycle once a week for an hour to allow motors to run?

[NEugeny]

The rubber stopper installed on the top cover. This hole is closed from above by the impeller, and to access it, it is necessary to remove the protective grille and impeller.
There are also no seals between the motor casing and the top and bottom covers.
The second chiller, which operates all year round, has no problems with the electric motors.
This chiller (C .... er) does not have a winter option, and the fans operate in automatic mode.
It will be very problematic to run the fans manually, while removing snow and ice from the impellers.
The lower part of the motor has seals, and there are no drainage or ventilation openings.

[chemi-cool]

Had a similar problem, is it a carrier chiller?

Replaced them with ebm fans. no more problems. you should expect bearing failure. not a good motor.

[NEugeny]

Had a similar problem, is it a carrier chiller?

Replaced them with ebm fans. no more problems. you should expect bearing failure. not a good motor.

1. Yes, bingo!!!
2. Exactly, the upper bearing has increased noise, compared to the lower one. The motor coast is still normal, the noise is heard only when the rotor rotates, in disassembled condition.

[NEugeny]

What are the off season temperatures/conditions.
I would suggest removing the motors at the end of the cooling season and put them into dry storage prior to refitting at the next season.
If not then perhaps fit electric heaters to keep them dry.
1. Temperature conditions: summer - to +35°C, winter - to minus 49°C.
2. Sense in the dismantling of electric motors, I do not see, as water gets inside during the warm period of the year with daily fluctuations in temperature. Number of motors - 21 pcs.
3. The thought is good, but one must think carefully about the ways in which this can be done.

[chemi-cool]

1. Yes, bingo!!!
2. Exactly, the upper bearing has increased noise, compared to the lower one. The motor coast is still normal, the noise is heard only when the rotor rotates, in disassembled condition.

I replace them with Ziel Abeg. 900 rpm 650 mm [if I remember right]. Electric cabel is long enough .
Carrier refused to sell only the motor, only a kit with motor and their blades.

[Grizzly]

very helpful Chemi.
Rep point sent!
Grizzly

[NEugeny]

I replace them with Ziel Abeg. 900 rpm 650 mm [if I remember right]. Electric cabel is long enough .
Carrier refused to sell only the motor, only a kit with motor and their blades.

Many thanks for the help. I'll try to find a fan suitable for the fixing and diameter of the impeller.