Kriwan Copeland Protectors

ddlong1286@yahoo.com

Hi Don,

These have been running since 97. Direction is fine. They are starting, just the module is shutting them off. I don't think that they are overloaded, I believe the comp would have to run longer to heat up the sensors in the motor, or be at locked rotor amps longer before it would shut off.

I will be going there tomorrow, unless of course it rains.

Don in Mo

ddlong1286@yahoo.com

Problems with Copeland Protectors

Hi all,

Been checking out some AAON units, 6-60 ton with 4 Scroll ZR16M3-TWD compressors with Kriwan motor protectors. 24v control. The protectors open when the comp are started. Comp bump start then off. These units had not been running, the only heat in the comp was the crankcase heaters. Some would start, but the majority would not. Some reset after 30 minutes, others did not.

Anyone seen problems with this setup? The unit is 460 volt. Sec. voltage is 24v, not 24+ as in most units. Suggestions, opinons?

Thanks
Don in MO

don_185

Whats up

Hi Don it seen you run across alot of different stuff in your travels.

I would check startup amps,safety and rotation on the compressor.What amps draw is your protector set at?

Sound like a few of them may be seize and sometime just reversing rotation will help.However keep in mind that on scroll the comp wil not pump if they are truning the wrong
rotation.

Happy hunting.