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So, 326# with r410a is 102° condensing temp. 42° subcooling puts your liquid line temp at 60°? At 90° ambient help me understand what I am missing here. The only way to get below ambient temp on...

I worked around a couple of studios several years ago. We put a loop in the flex duct to help with noise, also oversized. they will tell you the frequency of any noises, helps when tracking it down....

Sears doesn't build anything. Most of their fridges are Frigidaire. You can get a chart off the net, the first 3 digits in the model number denote mfgr. Years ago, most Kenmore products were...

A psc compressor will run backwards if you reverse the start and run wires. Maybe not for long, as the start winding is smaller than the run winding. One of the first contractors I worked for...

A few years ago i needed a new fridge. i consulted a couple of appliance forums, and the pros there recommended I get one with mechanical controls, or be prepared to replace boards within 5 years. So...

SLC, I used your manual on a RTU that was throwing the '9" code. First, I shut down the gas to the unit and bypassed all the limits, it never faulted. Replace the limits and it would run fine for a...

Water is so much easier than air, if you have vessel data, measure the flow and split, do the math. In this case you would have seen the high water flow first thing, and hopefully got it back to...

I used a couple of Honeywell t-tats in my brothers boat. Runs on batteries, and identified heat, cooling and fan. He calls me once a year or so, and I tell him to change batteries, and it works fine....

Are they approved by code?

Yep, thermistor(s)

I am almost to the point of not working on restaurants anymore. The have wore out equipment, once you touch it they expect warranty forever. And I don't like negotiating my price, after we have...

I can help you if you nee anything (maybe pm me or email see profile). Its been 15 years or so. I may try to write up a description of the mechanical and controls. or see if I can locate any training...

It may be possible for you to talk to someone in engineering at brandt to see if drawings of your bldg. are still available. If so they may be able to give (or sell) you a cd with pdf drawings. very...

You will have other boxes in the building. See if there is a diagram on one of them (1, 2, or more on each floor). And if they have modified the mechanics or pneumatics, it will give you nothing but...

Try these guys. everyone around here uses them since the 70's that I know of.
http://www.arkomainstruments.com/home

It takes more kw to make ice than it does to make chilled water. The key is what your kw cost is and at what times. If you make ice when your power is a lot cheaper, then melt it to cool when power...

Check the welds on the economizer brackets. The economizer shell is fairly thin and
I have found several with cracked welds. I found 4 in a 2 year period. Hard to pinpoint until you look. Also, the...

I had the opportunity to take on some refrigeration accounts ( after 30 + years as a hvac tech ), and I bought this book. Made most of it painless. I highly recommend this book.

BK, where are you located?

Can you use the same cooling water the plant uses?

Does the wire run in conduit? I had one where the wires ran in a channel. Couldn't find any issues until we were there at night, saw small arcing around the wires in the channel. Changed the wires...

Get the strobe. You can also use it to inspect belts that you can't turn off. Also get the belt sizes and sheave sizes without turning them off. Learned some of this at a facility where you couldn't...

Instead of a check valve, put a bi-directional flow meter in it and use that info to assist with your chiller plant control.

Used clc open bags for a few years, got tired of buying new every 8 months. Got the Tech LC, like it so far, it is obviously better built. Getting used to tool layout. Got to have everything...

Use the ball valve like the previous poster said. That way you drill it, pull out the bit and close the valve. Then add whatever fitting you like. When they do a hot tap in a pipe, they use 2 ball...

Didn't reverse the compressor direction did you? Some of the open drives have a directional oil pump.

I have been out, I was getting to what was said about the black box, and control panel upgrades. I had 3 black boxes someone was throwing away and I confiscated, but I cannot find them. I bet I can...

Which control panel does this machine have?

I have megged it, and it megs in the 2M range, but I may try that. I went through all the connections today, and it fire up and ran 3 hrs til I had to go, probably still on. Go figure, may have had a...

I'm dealing with a 30gtn 080 now. It is having the T05X code on the B circuit. It is now constant, and the safeties are not opening. Someone changed the cpcs on this circuit before I got here. My...

Strainers?

IIRC its an Okidata320. Its a dot matrix.

Saw a chiller at the york factory in San Antonio in 2008. The compressor was on the chiller like a YK. but had an impeller on each end of the motor like a double ender. They wouldn't talk about it...

I read a paper about glycol solutions a few years back as I was taking care of a dew ice storage systems. It is my understanding that as your temp drops to the solution freeze point, it makes a...

This, it really suprised me when a coworker showed this to me. Shook my confidence with the dials.

Just for grins, take a shaft and fix your indicator to it. Zero the indicator and then turn the shaft over and see what it reads.

Are the AK900 thermisters compatible with the Testo 550? Not the connections, but do the thermisters share the same temp/ resistance curve. I have a couplr for the Testo that was stolen, thought I...

The outfit I used to work for needed documentation on a couple of jobs so we bought a laser alignment setup. You could learn to use it in about half an hour. I brought a class in on a Saturday and...

+1 for Wiha. The best phillips I've ever owned. The flats are great screwdrivers, now use my larger Kliens for prybars too.

Astro, the co. that builds the curb adapter will have to measure if they don't have the unit size on file.

I have seen these units used with vav boxes. Could your low airflow be due to this? The compressors should have unloaders also. If vav, what air temp are you trying to get.

I use the same CLC bag. I get about a year and a half out of one. I don't use the shoulder strap, and the rods in the handle come out the ends. I may look for something else next time around. I do...

+1 on what Jayguy said. Personally got bit on #3 when I had an intermittant high pressure switch. Drops out and gives transition diagnostic.

Here we typically go with closed loop (we can't waste the water here) with glycol/water,cooling tower, and a heat source for coldest times. Unless you are using electric to heat the water, I would...

Heat the bearing . You want the bearing to be about 225°. I have used a toaster oven for years. Harder with big ones tho.

Do the main (building) pumps shut down at night? do they ever shut down? I am sure your pumps are there for redundancy. 3/4 hp pumps dont use much power. sooner or later you may regret removing the...

Pick the one you want from here
http://www.ifm.com/ifmus/web/dsfs!U40100.html#pns

One of the compressors will end up with all the oil. Then you know what happens to the other one.

You also posted this in the aop forum, see my answer there.

There is no tonnage designation in the model # on these machines. You need the desighn data sheet.