HALLMARK 6X12 CONVERSION

[Tommy B]

ok. don't ruin your Saturday though messing with this. Im sure you have stuff to do prior to camping next week. your whole day will be shot helping people.

I have comp time I need to use. Checking on leaving work @1100 am Friday. Would any time from noon on be ok for this Friday?

[flboy]

Tommy, I notice the model of AC you have has a locked rotor amperage LRA at startup of 48 to 50+ amps. If that is correct, I am suprised it ever started on a 30 amp service and maybe on 50. The LRA is the momentary current you can expect at start up. The starter boost cap should help lower that... but to get to 30 may be hard. Worth a try. I know guys who swear by it. If the AC is factory installed correctly, your wiring should be good for the current.

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[Tommy B]

ok Don I will be home Friday by noon.

The part will be here tomorrow. I upgraded to next day. It will be worth it for you expertise. Hope to see you then otherwise I will wing it!

this works.

[Tommy B]

Oh I just saw your post. Hope this is for nothing but if it doesn't work I must remove the unit as what good is it if I cant use it. Like the last 8 years. What does this go on ? a gray hound bus or something, Dam it.

[flboy]

Call me when you are home and I'll be there.

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[Tommy B]

ok

[Tommy B]

Hey I just got off the phone with the factory service rep.

Yup, the only thing you can do is the capacitor kit but this thing can draw 62 amps on start up or so he said.. The kit may help but may not be enough. I asked were would I get THAT kind of amperage and he said he did not know. WTF. Are they serious? I think Its a boat anchor for sure. My own personnel reef in 50 feet of water? Who would buy this from me used at this point?

See you Friday at any rate Don.

[hankaye]

Tommy B. Howdy;

RV's come in 2 flavors, 30 amp. and 50 amp. A lot of the bigger Rvs run a 50 amp service so they
can run a second A/C, bigger refrigerator, and 'other stuff'. Perhaps the folks that installed yours
grabbed the A/C from the wrong shelf??? Might be worth asking them a question or few ...

hank

[Tommy B]

You bet I did Hank. Said he was busy and to call him back later as this sounded like a long conversation. I will call him back after lunch. I bet its hopeless and I will eat the loss though. I will be back in a bit.

Thanks Hank, good info. The school of hard knocks is expensive to say the least At least I already have a nice window unit just setting around.

[flboy]

Tommy, we can try the cap.
It may do it. It is just the start up that's the issue... not the running amps. If the cap doesn't do it, I'll buy the cap from you.. I can use it on my rental houses. Older AC compressors can benefit from this in any case. We'll give it a shot.. only chance we got looking at your AC specs.

Btw.. you did state earlier the LRA was 62A . I missed that but saw the LRA a little lower than that in the manual. Either way, that is crazy if the same trailer company installed a 30 amp service. Somebody wasn't doing the math on that one.

My guess is that is a maximum. I can measure it and we will see just what it is before and after the cap.

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[Tommy B]

Ok Don. No problem

I did just talk to the trailer people I bought it all from. He said he still installs those units and that he has one himself and it runs off a 20 amp breaker in a 50 amp breaker box?? Said it does not need 62 amps to run. I can not explain or argue these things as its not my specialty at all. He did give me a # to a good service guy but I will wait till Don and I try this capacitor.

That's all I know.

Don I will give it to you if it does not work. Please!

Oh that LRA is for my model. I did see it. 57915-541. Right?

[Tommy B]

OK, much to learn here.
So what is LRA?

LRA INDICATES HOW MUCH AMPERAGE THE MOTOR WILL PULL WHILE TRYING TO MAKE THE ROTOR SPIN INSIDE THE STATOR, IF THE ROTOR IS LOCKED UP.

So if your pulling LRA, Its bad as something is locking up the compressor. Usually the crankshaft or a piston has broken. Maybe seized up due to lack of lubrication. The evaporator may also be flooded with liquid refrigerant. All possibilities. But I am out of my league here.

Just info I am reading but I do know now I may be fine with a 20-30 amp breaker like the dealer said. Just need to figure it all out.

Anybody got advice to help Don and me please chime in>

[flboy]

I'll measure the startup current. If it is in specification, it is working against the expected load. It's one of those things we just need to measure to be sure. If the LRA is higher than specified, then get worried.

It may work on the 30 amp breaker just fine if the surge is quicker than the breaker's trip reaction (it has to see the power surge long enough to develop the equivalent of 3OA DC I think. Breakers arw Time overcurrent devices. Can take alot more current over a shorter period of time). The boost makes a quicker start also which will reduce the duratation of the surge some also. We just gotta try it to see. Running amps are much lower like 10A or so. A 30 breaker is fine for the running amps. I'll be able to measure both with the voltage at the unit to make sure there are no drops due to wiring issues.

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[Tommy B]

you da man Don!

Hell yeah. We got this.

I just like this picture of Doc. It seems appropriate. Just wish I was smart like him.

we are going to install that flux capacitor. I don't care how many jigga watts it takes!
Must have AC.

[McDave]

Hey Tommy,
You guy's are great, and funny. Gotta say, I'm impressed at your ability digest and process information. Handy stuff that data. The more you know, .... well, you know..
I'll keep my fingers crossed for that hard start cap to be your silver bullet, make a quick afternoon out of it and do your victory dance in the end zone. Crack open a couple cold ones and bask in the glory! Whoo whoo!
On the off chance that PFL (pure friggin luck) doesn't get it, ... Got a plan B ?
Just a little insight from a old timer..
LRA is a bit of a misnomer, in your case it's not locked, just static. To get it off TDC requires some momentary effort or "amps". Once she's moving, it's all RLA from there. If it doesn't move, LRA till "something" gives. There are a lot of "something'"s shown on that schematic and in the guide. They are there to protect the circuit. And yet, the circuit breaker trips. Hmmmm, well, that almost sounds like a clue Mr. Tracey. just sayin'...
I wonder why all those other reefers that NEEDED hard starts didn't trip the breakers? Just PFL, I guess. Or...?

You remember how I asked all those pesky questions and wanted some pics. to begin this Dog and Pony? Just being a PITA I guess. Or....?
You have the manuals, I think I'll leave it right there for now.

McDave