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  1. I use a digital psychrometer that tells me rh% db...

    I use a digital psychrometer that tells me rh% db and wb. I use it when I am charging a system to tell me what kind of load is on my evaporator. If the wb is close to the db but the db is relatively...
  2. Changed out the motor today and it works now. It...

    Changed out the motor today and it works now. It was a bad motor just having those readings match up like that really threw me off.
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    Those are good formulas too know. It was around...

    Those are good formulas too know. It was around 65f oat. I believe I said that I know it has not load but the temp in the house is 72f but the return air is 60f and I believe this is due to the...
  4. questions about resistance test results for psc condenser fan motor

    I diagnosed a condenser fan motor as bad the other day. 35/10uf cap was good. Its a heat pump and I had 240 between my load side of my defrost relay and the common phase on my contactor with...
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    Also didnt mention blower is in high speed and...

    Also didnt mention blower is in high speed and checked run cap. 10 uf only putting out 8.5 uf so I changed it and it seemed like the blower ran better and my suction pressure came up to the point I...
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    Low airflow concern

    Working on a heatpump today for a maintenance and just couldnt get the pressures to suit me. Couldnt get my evap above 29f saturation. Clean condenser clean evap clean filter. suction pressure is...
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    ok

    ok
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    You might have a grounding issue. I know that...

    You might have a grounding issue. I know that spreading the crossovers isnt ideal, but no one here has ever done that? I am not talking about spreading them wide open just enough to be able to get...
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    Thats correct, my mistake. 27.72"w.c. is 1 psi....

    Thats correct, my mistake. 27.72"w.c. is 1 psi. So yeah 14"w.c. is a half psi. Shows you how small amount of pressure 7"w.c. really is. Its about 1/4 of a psi. Doesnt take much to clog that. I was...
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    I like your attitude, you enthusiasm tells me you...

    I like your attitude, you enthusiasm tells me you will do well in the trade. Dont sweat what some of these guys say on here because no matter who is the greatest technician in the world now they...
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    Some units use the air handler control board to...

    Some units use the air handler control board to bring on second stage. It uses run time as a guide, if it has ran for a predetermined length of time it will energize y2. I personally think a 3 heat/2...
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    deluthtrading.com.....footwear......men's Keen...

    deluthtrading.com.....footwear......men's Keen Pittsburgh soft boot.....about $200 after shipping but well worth it.
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    x2 My company bought me an Appion recovery...

    x2 My company bought me an Appion recovery machine and a brand new vacuum pump, not to mention a new van, couple of ladders, and gps, and I couldnt imagine letting anything happen to them. I think...
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    I use 2 sets one for 22 and one for 410 because...

    I use 2 sets one for 22 and one for 410 because that is what I was told to do. I never really thought the minimal amount of oil in the hoses would make that much difference. When I take my gauges off...
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    I think all compressors should have a start...

    I think all compressors should have a start capacitor.
  16. Replies
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    1,323

    Those are some pretty cool pliers. I want a...

    Those are some pretty cool pliers. I want a wrench that I can carry in my service bag on a call and dont have to go back to the van for my 8" to get the cap off of a service valve.
    1 3/8" outta...
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    1,323

    I found one. Channellock makes a 6" that opens to...

    I found one. Channellock makes a 6" that opens to 1 3/8" found it for $18.99 at Northern tool and equipment.
  18. Replies
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    Looking for a wrench

    Does anyone know a company that makes a 6 inch adjustable wrench with an extra wide jaw, like 1 1/8" or better?
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    I would tell the to close the dampers on the...

    I would tell the to close the dampers on the diffusers, or atleast run the upstairs heat a little bit and cut in a diffusser in the attic and damper it down in the summer. Another thing is I have...
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    To the op, dont check the terminal points on your...

    To the op, dont check the terminal points on your relay to ground, check across them. Firswt see if you have 24 volts on the relay coil, if you do then put your meter leads on your terminal points,...
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    check the grounding/bonding

    check the grounding/bonding
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    I will be the first to say that duct sizing is...

    I will be the first to say that duct sizing is not my strong suit. I cant read a ductulator very good at all, I dont know how to figure out how big my supply duct should be for the size of the system...
  23. Well I dont know if I am the only one or if I am...

    Well I dont know if I am the only one or if I am doing it wrong but I have never charged a refrigerant circuit any other way than throttling liquid into the low side, with my high side gauge always...
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    The way the by-pass works is you set the weight...

    The way the by-pass works is you set the weight on the barometric damper to close when all dampers are open, less static pressure against the damper and the weight forces the damper to close, and...
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    yeah thats pretty obvious now that youve...

    yeah thats pretty obvious now that youve mentioned it, but if you had 2 speed compressor and a bypass or dump zone.
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    Also I wasnt really meaning to set the whole...

    Also I wasnt really meaning to set the whole thing up on small zones but just one I mean a master bedroom on its own zone has to be a common thing. If you only have one small zone and the rest are of...
  27. Replies
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    beenthere I see your point and that definitely...

    beenthere I see your point and that definitely makes the normally open damper have its value. The Honeywell zone control you are talking about is the one that you can set the zones up by percentages...
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    Opinion on zone dampers

    i was at a class the other night for Lennox I comfort and we were talking about zoning and the instructor and everyone there acted like normally open power closed dampers were the norm and what they...
  29. I thought we were talking about a code for strip...

    I thought we were talking about a code for strip heat in a forced air system as the only source for heat. Sure radiant heat electric baseboards from room to room are fairly comparable in efficiency...
  30. same mass, smaller volume, increased pressure,...

    same mass, smaller volume, increased pressure, increased energy(heat-molecular motion)
  31. Amen This is a hard lesson to learn but fool me...

    Amen This is a hard lesson to learn but fool me once and shame on you fool me twice and shame on me. Always cover your ass.
  32. In my humble opinion I dont think that man is...

    In my humble opinion I dont think that man is influencing global warming, atleast not to the extent that was used as liberal propaganda, in fact many of the top climate scientists who were getting a...
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    Seems to me that if the liquid line is sweating,...

    Seems to me that if the liquid line is sweating, restriction, and the superheat is low, airflow charge metering device, there is more than one problem.
  34. Replies
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    With a restriction in the liquid line at the...

    With a restriction in the liquid line at the condenser he will have a high superheat, so its either way over charge, no airflow, or no metering device.
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    kink in the liquid line. You recovered the...

    kink in the liquid line. You recovered the refrigerant to pipe through factory drier inside the condenser, never reuse a drier, so you weighed in factory charge. sounds like a liquid line restriction...
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    moisture in the refrigerant circuit from an...

    moisture in the refrigerant circuit from an improper evacuation. moisture destroys the oil and causes the compressor to run hot, moisture mixed with refrigerant oil creates an acid that eats up the...
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    People that run there ac in 68f weather can have...

    People that run there ac in 68f weather can have freeze-up issues. Its doing what it is suppossed to do, leave it alone. At 68f ambient there is not enough load to keep back pressure above freezing,...
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    In all fairness though, if I were to buy my own,...

    In all fairness though, if I were to buy my own, new pump, I would change it more often, maybe once a month or so.
  39. Replies
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    The vacuum pump my company gave me to use is...

    The vacuum pump my company gave me to use is about 20 years old, seriously, Robinair, I change the pump oil probably 4 times a year. I use a yellow jacket micron gauge, vacuum rated hoses 1/4",...
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    I kind of like using my manifold gauges I have a...

    I kind of like using my manifold gauges I have a pretty good set up. 2 sets of gauges one for 410 and the other for 22, I have 1/4 inch vacuum rated hoses all the way around, and both gauges are set...
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    I use a jb pump with 1/4 vacuum rated hoses and...

    I use a jb pump with 1/4 vacuum rated hoses and usually dont have much of an issue with time, it a 7 cfm pump and the good hoses and pulling the cores out with my yellow jacket core tool I think is...
  42. I know this is an old thread but just wondering...

    I know this is an old thread but just wondering what type of oil you are using for making the flares?
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    I would have thought that if the txv is shutting...

    I would have thought that if the txv is shutting down the compressor will pull all the refer out of the indoor coil, pump down, creating a higher high side pressure. If its a heat pump you can check...
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    Thanks for the advice , I took it. Ended up they...

    Thanks for the advice , I took it. Ended up they do pay me for ride time but had forgotten to pay me for a day. I am glad I didnt go in to it with a full head of steam. Actually I took the job with...
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    Thanks for the info guys. I wanted to be armed...

    Thanks for the info guys. I wanted to be armed with some knowledge on the subject when I make my case tomorrow and I knew I would get it here. Either way the law works it is still a bunch of crap!
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    Yeah that $50 a week really bothers me. I dont...

    Yeah that $50 a week really bothers me. I dont live outside of service area but I dont live in the same town as the company locale(about a half hour ride). I have been working there since January and...
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    Ride time pay

    Is it legal or illegal for a company not to pay me for drive time in between jobs? I am not talking riding home or to work, I clock in when I get to the first call and out when finished with the...
  48. Replies
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    A pitot measures both total and static pressure....

    A pitot measures both total and static pressure. It is concentric with the inner tube measuring total and the outer tube surrounds the inner and has several tiny holes and connected to the other end...
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    If you are worried about pressure drop with the...

    If you are worried about pressure drop with the plate heat exchanger why couldn't you run a hot water recirculation loop? I know the main obsticle is volume but a recirc loop might combat the...
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    That a tough one. I would think that the head...

    That a tough one. I would think that the head pressure would build up in ac mode leaving backing the refer up in the condenser. So in heat mode samething but it would be backing up at the indoor unit...
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