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X2, cost effective and it works

I know this is a ten year old thread, maybe you know this but Andy retired recently, I guess that means he will be working for free.

I thank Andy and Mr Dennison for all they have done for our...

Those new valve plates need to be run in for 24 to 48 hours to get a valid pump down test. What type of interstate desuperheating are you using?

On a typical receivers the refrigerant is kind of first in, last out. On a surge tank refrigerant first in, first out (close but not ALWAYS FIFO) surge tanks have a weir at the inlet to facilitate...

I think I met him in Staunton several years ago at a PE tear down school. The just hospitalized my son in law mom with COVID it turned into pneumonia in less than a day. Family had to leave Christmas...

That is a good improvement did you verify CFM was the same?

@VTP99 I see now in the pic you sent.

What location did you take the pressure readings?

That is a substantial range on some of those valves

We see this a good bit. Even if you retap the transformer if the stat is located beyond its maximum distance you still might get chatter.

@snapperhead A three pole contractor could aggravate the...

Or is it

Two one way
Six two ways
Five threes

end of test

Do three AAA =1 D?

Call him what you want he is THE ICEMEISTER.

Great thread BobFrost, you had everybody thinking overtime.

Are these domestic or feral pigs?

Good deal sound like your on top of it.

We have saved several barrels with Eddy Testing, lost two because we didn’t, it is like politics those that do those that don’t, somehow they both work out....

Are you doing oil and refrigerant analysis? Like motojo said moisture and other contaminates can cause megohm values to trend down. Are you doing tube testing?

Are any of your other trending...

That condenser is dirty, looks like somebody brushed half off, like Quinnnipiac said, it needs to be cleaned not brushed off.

The amp are low because it’s not pumping anything, it’s not pumping anything because the suction is blanked off with a gauge. The pump down test seems to be ok.

If your not an experienced tech,...

Three since 1972, two were certified remanufactured semi’s, one Copeland one Carlyle. The hermetic did what you just described, but with high amps. I did have one other that was grounded out of the...

Maybe before you cut it open put a gauge on low side bench run it and see see if it will pump down.

I didn’t see any amp draw or other important information that you used to deduce a compressor...

Thanks, you guys convinced me I will be going with a conventional HP system. Our ASHRAE design is above 22*F we have 6” well insulated walls and 12” ceiling.

Your comments really changed my mind!

Not really since like you said it will be on HP most of the time.

For the rest of the story we are encapsulating the crawl space so we will not have adequate combustion air for the 80% furnaces,...

Great copper, can you clamp them faster than soldering?

LP are the 90 plus reliable, it in a crawl space, read some comments about secondary heat exchanger stopping up.

Dunham Bush used to make a unit that you are describing, not sure of availability now. The unit had two centrifugal blowers driven by a single double shaft motor. 2 to 5 tons.

If he is an older...

I am not as knowledgeable in modern residential equipment as many of you are.

It is time to replace my heat pump, it is an 80% 13 seer hybrid HP.

I can do all the cost savings payback...

We do preemployment test and on event (vehicular accident, job site accident....)

The state and our insurance company dictate how our “drug free work place” program is implemented.

Your DOL...

Well it’s got a back draft damper doesn’t it?

That was a bad joke.

We still have some of those Atron systems at the shop, the young techs will call the old hats out there and and say “what’s that”

I’ve put in new Atmos systems, there are a lot of systems that...

Not on those chillers, but same motor. Motors are fine, our power packs are failing. I will try to find my pics and assessment we made, we had a string of them, I think it was on speed control...

Have you checked to make sure expansion tank is not waterlogged or if has a bladder that the bladder is not ruptured.

This would cause relief valve to open as the water gets hot when the boilers...

Think dandyme hit the nail on the head with the red letter edition. How “water cold in, hot out....” I think that liquid pressure is 125* SCT, high for any loop system I’ve worked on.

Unit can...

I understood what he was saying, I guess my wife yelling at me for nearly 50 years paid off.

R600a, I hope he lets us know what he finds out about this too.

I’ve only seen PVE lubricant on scroll compressors in stationary refrigeration systems, that does not mean there are not others.

Each manufacture list recommended lubricant for specific...

icemeister that was the link, and greg58 that was a good pic of what I needed.

This getting old and forgetful is not for sissies.

Thanks to all for the information, is this a great site or what?

UmmScott

That sounded a lot like it best I remember it had pics of basic system drawn with Hot, Warm, Cool, and Cold with an explanation of several problems and what you would expect to see, a lot...

That is good advice, that is the first time I’ve heard half cond warm it’s waxed, make sense since it would be restricted and increasing subcooling.

On this site (I think, defiantly maybe) I saw a touch method for troubleshooting cap tub sealed systems, I believe icemeister may have produced and explained it.

It was a great troubleshooting...

Other than staging is there a reason you did not use the lead-lag function in the K2 Therm software? Did you do the 407A conversion, how are those 5H’s handling that? Have you noticed any performance...

Looks good. Is that a Sporlan EEV, I thought the used a Carel or Danfoss valve. How are they performing?

My understanding is Trenton is using the K2Therm product.

The factory guys came by our...

Those required hold down straps kind of defeat the purpose of those new easy off panels. Is there adequate clearance on the sides facing the house?

That looks like a nice clean job, the line set...

We should all be working in the customers best interest. If we take it to the powers that be an they say install as specified we need to get with our project managers and document their decision.
...

ASIC, configured with set-sys, dial up modem.

Our first system used a pay phone booth for the modem connection, every time someone used it it knocked us offline.

BadDaddy has the master book. I have always looked for a maximum 2 degree drop on my vapor lines while still considering my minimum velocity for oil return. On liquid lines max velocity is...

We clean separator recharge with oil, change oil in reservoir, then you can change by compressor, we send oil sample to lab, and change oil filter in line from oil reservoir to the oil pods. Hope...

Wayne,

I am a refrigeration guy but am a student of air flow in systems. I agree there is a lot of misinformation out there. The best stuff I see is from fan manufactures, product manufactures...

Are you saying that taking the static pressure drop across a cooling coil is useless information and does not correlate to the manufactures CFM to pressure drop information?

If you have multiple evaps at the same or lower elevation than the common suction line you need to use inverts to prevent flow of refrigerant and oil into other evaps. Sporlan Bulletin 10-9 has a...

I’ve had a True T-49TD (one side medium temp one side low temp) in my garage in north Georgia about eight years, no low ambient controls, I works fine. The medium temp side runs a little warmer in...

ISO 68 for all POE lubricants down to -40f.

I have been told 33% flow, felt like 25%. It varied with fan design.