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The semi hermetic screw compressors (bitzer) that I have worked on have rotation monitoring safeties. Hook it up, if it shuts down on rotation, switch the legs. The open drive screws, well they're...

I don't like to set pressure cut out below 0 just in case the system develops a small leak it won't be in a vacuum. I usually cut out around 5 psi. That compressor should be able to pump down below...

Also, what is your suction pressure on pump down? Does the time between cycles increase when it pumps down the second time?

If it isn't the solenoid then it could be a valve. Does it have suction/discharge service valves on the compressor (assuming its recip)? If so, you could pump it down and turn it off. Then close...

Thanks. I just took on a small independent store. I feel so lost on these things. In the end it's just refrigeration, but it's the little tips and tricks that you can only get from experience that...

Yeah I've got a cracked tee on one of the drains so I'll be doing plenty of fixing just to get by while I'm waiting for parts. Thanks for your help. Once I get the drains fixed and de-ice the coils...

I guess I should say I've de-iced plenty of high and medium profile coils, but this is my first time working on reach in coils.

10-4. Im all about the water hose. Just wasn't sure if it was worth it to try and remove the plenum with the fans or go through the fan holes.

I have an Hussmann RL-5 lineup that has iced up evaporator on 3 out of the 5 sections. What is the fastest way to de-ice these evap coils. It looks like the plenum can be removed to gain access to...

Ok, I'll see what I can do. I will be working offsite on a running system for the time being so I'll figure out how to set that up and start recording. I'll probably do some on the E2 itself and...

Yes, when all is right the valve will hold very close to sh setpoint. Assuming the charge is correct and the superheated is that far off you have a problem with the transducer, the temp sensor, the...

That controller is a rebranded ke2 therm controller. I would check the temp sensor to verify it is reading properly. Then I would login to the controller and change the superheat set point and...

if its a sporlan moisture indicator and it looks black then somebody baked it when they put it in. You can buy the element by itself and change it out by removing the bolt in the back of the body. ...

Which eev is it. I mostly familiar with the sporlan eev. On those valves you can ohm out the two stepper motor windings and determine if the motor is good. I think that most of those small valves...

I was considering making some instructional videos about the Emerson E2 and some of the different ways to set one up. There was also some interest in how to setup up alarm emailing which I am also...

TimJimBob - I didn't figure that the installers would know what a manual j or d is. I think I have access to enough brainpower and resources to figure those out. I have run service calls here and...

I am a commercial/industrial refrigeration technician in the DFW area looking to expand my knowledge base. I started this trade in service; therefore, I have little knowledge about residential...

I ran across something I hadn't seen before today. The return (16" flex duct) is running through the supply plenum and terminates at a combination return/supply grill. I could see how this might...

You need to have a computer running ultrasite that has outlook (not express). Message me your email address and I can email you the setup instructions from CPC.

I have also seen both. It's usually "preferred" to put the solenoid as closer to the coil as possible. This eliminates any possible hammer caused by feeding high pressure/high velocity liquid into...

Yes I am that lucky. I have two accounts that I split my time between. I know my customers very well. They spend a lot of money on their systems, so if I need to replace a sheave I replace it and...

Ok then it's even more simple. You aren't talking to the customer. Why not? If you had 3 out of 6 units crap out on one building who would give you the go ahead to replace them? There has to be...

Last I checked pictures can be emailed. You have come up with a counter argument for everyone's suggestion, but I'll throw one more your way. You say to the customer (however many there may be and...

I like to show the customer. I place the sheave gauge on the pulley and then take a picture of the light coming between the gauge and the pulley groove. Or, if it's a small one, I take the sheave...

Hoshizaki makes an automatic ice maker/bagger setup. Might be worth looking into. Around here most of the small stores depend on delivery from the regional ice house. The ice houses here provide...

If only add that it might help if you looked at the compressor as a compressor and a vapor pump. Maybe this would help you to wrap your mind around a little easier.

^^^^ Ding, Ding, Ding

Yes that would be my recommendation. Analysis is relatively cheap. It's just like any other preventive maintenance tool. The more frequently you sample, the clearer the readings become.

I like to alternate oil analysis with oil changes annually. Basically, I try to do oil change annually and then at the 6 month mark I do an oil analysis reading. Not just for acid, it keeps a...

If the condenser is dirty or condenser fan is out it will cause high discharge, in turn causing high suction. I would start there before I condemned the compressor.

That's very interesting. Who knew shaft seals could lead to good conversation. I work mostly with Vilter 440/450 compressors. This is the actual language from their service manual. 471231

www.omega.com
If you have time to order it they'll have what you need.

Not sure what the instructor was referring to in this case. In order for the shaft seal to perform properly the bellows need to be constantly lubricated. There is a weep/drip hole in the bottom of...

100% agree with all the previous posts, but I would also add that the compressor type you choose is going to be determined in large part by your system requirements and who engineers it. I have one...

Anyone heard of openings in the DFW area?

Hello all. I am trying to relocate to the DFW area and need some help finding industrial refrigeration companies in the area. I have about four years of experience working on a variety of different...

Simple green in a Hudson sprayer. Spray the whole coil down with the simple green. Let it soak for a few minutes. Use water hose with nozzle to wash off dirt. If you have access to warm of hot...

I'll try that. Thanks medic.

Run cap is new and I have checked it multiple times thinking the same thing. Still shows correct capacitance (35).

Alright guys,

Looking for a little help on a problem unit I am dealing with. First call was to replace the dual cap due to condensing fan not running. Replaced the cap, but the compressor was...

Only reviving this old thread because I'm pretty sure I have Stoecker's "Industrial Refrigeration" in PDF somewhere in my email. If you would like a copy shoot me a pm and I'll get it to you.

385481

Have no idea how it happened, but my customer called asking for a crane and sent me this picture. In the end they were able to get it turned over with some other forklifts. Wish I could...

Suddenly the hotter than hell process plant in working in doesn't seem so bad. If they ask you to check out a problem with the inside of the oven, I suggest turning that work down.

Sorry ga hvac my post was directed at the op not to you. We must have posted at the same time. I also was trying to provoke the op to think where the moisture would have come from that they thought...

Others have said it but it doesn't seem like they were heard. Before you do anything else you need to clear the sight glass and set the superheat for each txv, not just if it is "flowing" or not. ...

Without knowing the amp draw on the motor it's going to be hard to say what's wrong with your motor. My advise would be to triple check that all of your connections are torqued properly.

That sounds like a wonderful textbook answer, but where did the moisture come from???

JB makes enviro safe hoses

Reminds me of techs who turn ball valves past the stop pins and shear them off. If something takes that much force I try to make a habit of taking a second look at the situation before proceeding. ...

On call is a mind set. We're on call from Monday to Monday about once a month. During that week I just get it in my mind that I'm going to get called out. That way when I do it's not such a big...