Ooh...

For those situations i carry the mars 60 relays

BUT.....I also carry the 5 2 1 universal kit for this type of moment.
It kinda sucks yeah but the 521 will get it running.

Ive actually left a 521 kit in place and its been about a year now and no issues so far.

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I have the Mars 60 relays, but none crossed over, and they were physically too large. What's the 521 kit? I ended up using a Supco URC0210 relay/capacitor/overload to get them running.

 

Yep.

Those 5-2-1 are made to be a "hard start" for resi air conditioners but they work good for refrigeration compressors in a pinch.

 

A physically smaller Pot Relay? Got a comp MN to go w/ that?

 

Model # RST45CIE-IAA-108

And, Copeland is making me crabby. Sticking the control boxes on the sid of the compressor... right over the plastic terminal box cover. 7,000 wires, a terminal strip, and a relay; all stuffed in a 2 sq. in. Box!

To top it off, the screw to mount the relay can't be accessed without removing the box from the side of the compressor.

 

OMG! I'm such an idiot! The relay is a 040-0172-03. It's a current relay. :Faint:

I was thrown off when I saw the bleed resistor on the cap, and the remote screw mount on the relay. To top it off, when I looked it up in the Emerson X-REF app, the exact compressor didn't come up. The one that did, used a potential relay.

I'm still interested in what everyone stocks on their trucks. Current and potential.

 

I have always carried the mars 66, in a pinch this has worked on 230v units, gets a guy by until you can get the oem. I agree Copeland is getting stupid with some their controle box settups

 

In a pinch I've hot wires them to run and pegged the tstat and removed any defrost cycles

 

I've done the same.

 

Copeland has two diff size current relays. The smaller one pushes onto S&R comp terminals. The other current relay(larger body) has the mounting screws that go thru the back of the comp control panel. And the control panel has to be removed from the comp to gain access to the screw heads,its been that way for a long,long time.

 

How bout hookin up a potential relay instead of one of the big current relays in a pinch

Done that one too

 

I used to stock all the Mars/Steveco/RBM/GE Relays from the 90-63 to the 90-71 and they covered all the bases...until Copeland and Tecumseh started revising all their start components. I am certain there was collusion there somewhere, but I can't prove it.

This guide provided all the info you needed to know:

https://www.marsdelivers.com/wps/wc...853.pdf?MOD=AJPERES&CONVERT_TO=url&CACHEID=0f4c2377-9b43-415c-b2eb-a89019251d2c

Mine was so worn and tattered it became hard to read...right about the time it also became obsolete because there were any of the listed units left any more.

If you have to buy a relay that you don't have in stock, but two of them.