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Type: Posts; User: gus99

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  1. Replies
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    Are you British and in England? "Service...

    Are you British and in England? "Service Engineer" is a typically British title for maintenance technicians across many industries.

    That said, many service technicians over there are in fact...
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    Is Internet really cheaper???

    I once look at an internet dealer's pricing on Goodman. It was list or "customer" colum. Just for fun I called them. They claimed yes it's the contratctors price. I asked why Johnstone was 20%...
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    Depending how the over temp protection works,...

    Depending how the over temp protection works, this could be a sign of a serious problem. If the over temp sensor cut's off the AC power completly, this would account for the fan going down as well....
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    Why can't the joints just be wrarpped with the...

    Why can't the joints just be wrarpped with the proper tape? Leave the old tape there and just wrap over it. Other than it's adhesive failing what other problems will it cause?
    Honestly the scope of...
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    Example: "I needed to move my condenser and when...

    Example: "I needed to move my condenser and when I cut the pipes all the air came out along with some oil. The air frosted up too - strange huh. I put it back and filled the pipes with an air...
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    That's not really a true EMF measurment. To do it...

    That's not really a true EMF measurment. To do it right you need a lab storage oscilliscope. The EMF will be very high at startup and close to unity at running load. Unless your meter can take a...
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    The condenser needs to sit level and be stable....

    The condenser needs to sit level and be stable. Doesn't really matter how you achieve that. Two rail road ties and a sheet of marine plywood would work too but perhaps a bit of a hack job!
  8. Thread: Can R22 mix

    by gus99
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    590

    Careful!

    Ah, Azeotrops. There are some applications for mixed refridgerants in highly specialized applications. I have a college level HVAC book that goes into the chemistry of refridgerant blends. Quite...
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    It's a licensed commercial station. Older 5KW...

    It's a licensed commercial station. Older 5KW tube rig, probably a "hand me down" from another market that upgraded. One of the smallest in the market and I am doing some consulting for the part time...
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    The voltage rating is primarily the dielectric...

    The voltage rating is primarily the dielectric strength. Now with oil caps and their metal shell, there is a definently a concern with internal arcing to the case but the difference between 440v and...
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    Yes, typically 220K at 2 watts each.

    Yes, typically 220K at 2 watts each.
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    Thanks, I know that trick but would rather not go...

    Thanks, I know that trick but would rather not go down that road. Space concerns.
  13. Thread: 24v contactor

    by gus99
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    1,077

    Measure the coil voltage when it's pulled in....

    Measure the coil voltage when it's pulled in. Should be no less than 21vac for reliable operation. If it's lower than that, you have a control system problem.

    Another possibility is the motor load...
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    Who stocks 660v run caps? I need 10uf. Grainger...

    Who stocks 660v run caps? I need 10uf. Grainger and Johnstone only stocks 370 and 440v.

    I'm in Los Angles but online order is OK too.
  15. Thread: Speeding ticket

    by gus99
    Replies
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    1,518

    I you stand to be fired over a minor sppeding...

    I you stand to be fired over a minor sppeding ticket, you are on your way out anyway. I find it hard to believe any shop would fire a skilled competent tech over a speeding ticket.
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    THis is not really a technical question but...

    THis is not really a technical question but rather a legal one.

    If the sales contract says the line set is to be replaced, then it must be. It doesn't matter if the tech thinks the old set is OK....
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    I belong to several various forums, electrical,...

    I belong to several various forums, electrical, home audio and video, and a couple of computer forums.

    They all have some form of no price discission policy. Some only allow MSRP to be listed. ...
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    Yes call for service. There is usally a seperate...

    Yes call for service. There is usally a seperate breaker for the furnace and fan unit. But the furnace / fan unit also typically provides the control system low voltage. So if the fan unit has a...
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    This is a very dangerous hack job. Kill the...

    This is a very dangerous hack job. Kill the circuit breaker!

    Black - power feed to the primary
    Orange - switched hot for motor and transformer
    White - neutral.

    So it seems that they hooked...
  20. Thread: Sweet Conduit

    by gus99
    Replies
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    3,063

    In Los Angeles city and county there is no limit...

    In Los Angeles city and county there is no limit on legnth. But you must install a ground wire at any legnth. The flex cannot be used as the ground.
  21. Thread: diy

    by gus99
    Replies
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    1,481

    Hmmm, I guess all the pro's here started at the...

    Hmmm, I guess all the pro's here started at the top.

    Some replies in this thread is a disgrace to your business. Here we have someone wanting to learn and he/she is scorned fior asking. This...
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    I'm not a licensed tech myself but as an...

    I'm not a licensed tech myself but as an engineering department manager in the broadcast TV industry, critical technical plant HVAC maintenance falls under me (and occasionally office HVAC as well)....
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    Why can't we simply answer the posters question. ...

    Why can't we simply answer the posters question.

    Just put a 24v lamp acroos the terminals you want to monitor, heat, cool, and /or fan. I don't know the exact colors without looking it up but a...
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    View Post

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    There are two types of three phase power, Delta...

    There are two types of three phase power, Delta and Wye. Delta has no neutral, Wye does.

    Though mostly obsolete for new work, 3 phase Delta @ 240v is 240v phase to phase as you describe.

    But...
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    And isn't the bacteria level carefully monitored?...

    And isn't the bacteria level carefully monitored? I mean they do want bacteria to eat the sewage. Too much clean water will upset the PH.
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    Why does it need "rewiring"? Was it in a fire? If...

    Why does it need "rewiring"? Was it in a fire? If so you are wasting your time.
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    A TRIAC is an electronic switch similar to a...

    A TRIAC is an electronic switch similar to a transistor. In fact a TRIAC is really just two SCR's back to back. My guess is they are using the TRIAC in the first stage to provide infinite variable...
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    Just go to the north east, especially...

    Just go to the north east, especially Philadelphia suburbs. Oil burners rule the roost here.
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    Some of the online sites I looked at are selling...

    Some of the online sites I looked at are selling at MSRP so where's the savings? A authorized install and service dealer will often sell the unit below retail as he has a margin to work with.

    You...
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    I must disagree with your disadvantage #1....

    I must disagree with your disadvantage #1. Switching power supplies are capable of very high currents. The power supply in a typical PC supplies 3.3 volts at 40 amps along with 5 volts at 20 amps,...
  32. Thread: DIY hall of fame

    by gus99
    Replies
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    3,923

    One more thing - these internet dealers still...

    One more thing - these internet dealers still charge retail price for the system. I once saw a Goodman online that was twice the price of the same unit from Johnstone. In other words they were asking...
  33. Thread: DIY hall of fame

    by gus99
    Replies
    39
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    3,923

    What's brazing? Any seasoned DIYer knows you...

    What's brazing?

    Any seasoned DIYer knows you solder copper pipes. Also make sure you get plenty of paste flux inside the tubing to get the solder to flow nicely!

    [Edited by gus99 on 08-18-2005...
  34. Replies
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    Well it's soley my opinion. I realize code may...

    Well it's soley my opinion.

    I realize code may be far less stringent but then there is no rule against exceeding the code requirements. And I'll bet there are customers that will pay for a quality...
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    Keep in mind people that Glendale is a suburb of...

    Keep in mind people that Glendale is a suburb of Los Angeles. Read earthquakes.

    IMO, this job is not acceptable. I hung a unit in my attic and used 3/8in rod down to unistrut that the unit is...
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    2,748

    Perhaps not such a bad idea. Propane is a well...

    Perhaps not such a bad idea. Propane is a well known refridgerant, even better then Freon. So would Methane work as well?

    And hey, no EPA license required!
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    geeze! He is not asking how to charge a unit....

    geeze!

    He is not asking how to charge a unit. He is simply asking the average current demand of a 2ton unit. Doing the electrical work by the homeowner is perfectly legal provided it is inspected...
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    Yeah, spelling needs some work or my keybaord...

    Yeah, spelling needs some work or my keybaord needs cleaning. But at least I can hook the hoses up right.

    Blue to the fat pipe.
    Red to the thin pipe.
    Yellow to the water hose.

    Did I get it...
  39. Replies
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    There are situations in commercial where ducts...

    There are situations in commercial where ducts are grossly oversized for noise control. TV and recording studios. But then these systems are engineered to operate this way.
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    Well I am a DIYer as far as HCAV goes. And I...

    Well I am a DIYer as far as HCAV goes. And I agree anyone can learn the trade. Afterall we aren't born with our lifetime knowledge.

    So as one DIYer to another - if you don't know which hose to...
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    13,361

    Yes, Sears did sell DIY split systems in the 70s,...

    Yes, Sears did sell DIY split systems in the 70s, probably in the 60s too, You are correct, the line sets were pre-charged and worked as you describe, tighten down the connectors, and some seal was...
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    13,361

    That's true for refridgerant cans but split...

    That's true for refridgerant cans but split condensers aren't tagged as "certification required". I cannot buy Freon even though the company has a cert on file. At our Grainger (Los Angeles) the...
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    That's incorrect. Charged "Split Systems" can be...

    That's incorrect. Charged "Split Systems" can be sold to non-certified customers. ead the rules carefully, it specifically addresses this. Now it may be illegal to open the valves but it's not...
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