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Type: Posts; User: markmast

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  1. Replies
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    Thank you! I will keep you posted

    Thank you! I will keep you posted
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    I will post diagram tomorrow while im there.

    I will post diagram tomorrow while im there.
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    No pic of the diagram, sorry I didnt see the...

    No pic of the diagram, sorry I didnt see the reply until now. Found a melted pin connector At the condenser fan motor and saw a spark from there while running. First time I actually saw the fuse...
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    Both fuses blown*

    Both fuses blown*
  5. Replies
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    348

    Lennox RTU fuses keep blowing

    working on a Lennox rooftop unit 575 volt envy first visit there I found the fuses for the condenser fan motors both alone replace the fuses and checked for shorts to ground and checked relays and...
  6. Thread: Tank Sprayer

    by markmast
    Replies
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    444

    Also how does the sprayer work? air compressor?...

    Also how does the sprayer work? air compressor? hand pump? sorry guys no one at any company ive worked at has ever had one
  7. Thread: Tank Sprayer

    by markmast
    Replies
    2
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    444

    Tank Sprayer

    To you guys that use tank sprayers, this might sound like a stupid question but what do you rinse the coil with afterwords, ive never used one, i do maybe 10-12 commercial maintenance jobs myself and...
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    4,233

    Can you email me prices and pics on the recovery...

    Can you email me prices and pics on the recovery machine, turbo torch and vacuum gauge? Thanks
  9. Thread: New C of Q

    by markmast
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    18
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    4,935

    Ya randys a good teacher!

    Ya randys a good teacher!
  10. Thread: New C of Q

    by markmast
    Replies
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    4,935

    I'm in advanced at mohawk right now, I'm going to...

    I'm in advanced at mohawk right now, I'm going to write in january hopefully, I heard there was 4 different tests and some were harder then others I can't wait to get it over with tho
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    carrier heat pump water source

    Working on a carrier M# 50rhr036scc51130
    S# 3805v19316
    Keeps locking out, can't figure out why water into the unit 80f water out 125f
    Suction pressure 75 psig
    Discharge,before entering condenser...
  12. Replies
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    1,062

    so that is a seperate device? do u have a...

    so that is a seperate device? do u have a website?
    thanks
  13. Replies
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    1,062

    all in one hand held tool

    Does anyone have an all in one hvac tool that you can input info to determine superheat, p/t charts, ductulator and heat load all in one? and how do you like it?

    would you prefer a hand held...
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    So it will be R408A in the system will it not?

    So it will be R408A in the system will it not?
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    1,270

    Its on for about 10 minutes before it has a heavy...

    Its on for about 10 minutes before it has a heavy frost on it back to the compressor and eventually starts to ice up
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    1,270

    Ice maker problem

    I got a call today for a Hoshizaki Ice Maker, model KM-250BAC, i dont really work on ice makers that often so any help would be appreciated, It has a Copeland Compressor M# RSU4-0050-1AA-908
    S#...
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    548

    Lmao!!! sorry i didnt even know they gave me the...

    Lmao!!! sorry i didnt even know they gave me the professional member!
  18. Replies
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    548

    well can i get an answer because they never gave...

    well can i get an answer because they never gave me a proffesional membership, i have probably 50 posts and you only need 10 for proffessional and i have my g2 and has been to school twice for...
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    548

    Boiler Maintenance

    confused:What is the best things to do for a residential boiler maintenance, i usually, clean the burners check gas pressure, check expansion tank pressure, bleed air at bleeders if needed, amp pump,...
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    your right i shouldnt think the same scenario...

    your right i shouldnt think the same scenario before i get there, but ive always been meaing to ask about these high pressure switches on those units, because i have reset them before and never gone...
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    Reset button on old Lennox

    On the old lennox condensers, i dont have the numbers with me but those old grey ones, they have a red reset button for high pressure underneath the electrical access panel or above the gauge ports,...
  22. Thread: Trane chiller

    by markmast
    Replies
    1
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    646

    Trane chiller

    I dont work on chillers that often but i am required to change a compressor on a trane chiller for a customer of ours, what steps are required that would differ from a commercial rooftop package...
  23. Thread: York rooftop

    by markmast
    Replies
    1
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    565

    York rooftop

    I was working on a yorkrooftop unit last week and the breaker in the disconnect (100amp 3 phase commander breaker) was no good, i had proper voltage at line side and missing 1 leg of 3 phase on load...
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    Bradford White HWT Problems

    I was working on a bradford white hot water tank today the M# is MITW40L6BN15
    S#BF6365642

    Tank would ignite and run for 10 to 20 sec and flame would shut off, it would do this over and over...
  25. Thread: Air balancing

    by markmast
    Replies
    26
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    3,911

    Air balancing

    My company always hires out air balancing on commercial jobs, is there any course or any good way to learn air balancing? i know you need some expensive tools for it but i dont know anything about...
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    Noma t-stat junk

    Has anyone ran into this problem? i have seen it a few times... people with 30 or 40 year old olsen or clare heckla low boys changing from a mechanical t-stat to a cheapo digital programmable...
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    zebra analyzer

    what is the best zebra analyzer?
  28. Replies
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    whats a zebra analyzer and how does it work?

    whats a zebra analyzer and how does it work?
  29. Replies
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    DC Motor Question

    Went to a call in the middle of the night yesterday, i had a DC variable speed motor not running, i dont have much experience with these types of systems, 2 years in the trade and my company mostly...
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    Heres the situation now, my boss came with me to...

    Heres the situation now, my boss came with me to the site, we closed the economizer fully and the door was till opening therefore the blower is the problem, supplying too much air then its taking...
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    Whats a VFD ??? My company does not have a...

    Whats a VFD ???

    My company does not have a micromanometer....

    The economizer did not come with an exhaust fan for the dampers, ive never seen that before, anyway my boss expects me to fix this...
  32. Replies
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    Need Economizer Help

    My company recently installed a rooftop unit at a newly constructed variety store, Its an Allied commercial rooftop unit with an economizer on it, the building is getting a positive pressure and...
  33. Replies
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    1,036

    ya its a ref plus... are they known to leak??? im...

    ya its a ref plus... are they known to leak??? im going to have problems then with 2 evaporators! and yes i have P-traps on the suction line because the compressor is above the evap coils!
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    ref plus cooler, 2 Evap coils

    I am going to install a ref plus cooler at a confectionary today with 2 Evaporator coils, I have done a few but i will be honest i usually work with residential and commercial air conditioning but am...
  35. Thread: geothermals

    by markmast
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    387

    geothermals

    can someone explain geothermals??? ive never even heard of them!
  36. Thread: Geothermals

    by markmast
    Replies
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    549

    Geothermals

    Can someone explain geothermals??? Ive never even heard of this before!
  37. Replies
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    thanks for the help, one more thing tho, i wasnt...

    thanks for the help, one more thing tho, i wasnt thinking the TXV was plugged, i konw the suction would be low and have normal to high head with a restriction but i thought maybe the TXV was faulty,...
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    ya im in the trade, im a refrigeration apprentice

    ya im in the trade, im a refrigeration apprentice
  39. Replies
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    how can the compressor be bad?? its pumping? isnt...

    how can the compressor be bad?? its pumping? isnt the plugged txv more realistic
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    Thanks guys! I do need to do some self learning...

    Thanks guys! I do need to do some self learning on these types of systems.... still an apprentice and this website is a great learning tool!
  41. Replies
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    bad pump?

    bad pump?? which pump?? the compressor??? sorry im drawing a blank here...
  42. Replies
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    1,359

    cooler only goin to 60 deg. F

    I had a call today that a cooler was only reaching 60 deg. F, i dont do much refrigeration so any help would be appreciated, it didnt seem low on refrigerant (runs on R 22) pressures were 80psig and...
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    ductless mini split problem

    I was doing a simple maintenance a few days ago on a mini split, installed in a house about 5 years old. It was cooling properly the customer just wanted it cleaned and checked. I took the dry and...
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    ya whats fluff imo i never heard of it

    ya whats fluff imo i never heard of it
  45. Replies
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    American Standard

    has anyone here worked with American Standard furnaces and A/C's, i recently have and they are the best ive seen! what do u think?
  46. Replies
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    1,759

    fluff IMO??? is that a company??

    fluff IMO??? is that a company??
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    why doesnt goodman require iwb?

    why doesnt goodman require iwb?
  48. Replies
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    1,759

    digital refrigeration system analyzer

    Does anyone here own a digital refrigeration system analyzer, how are they? worth the money? i know testo and yellow jacket make them.... any recommendations? Thanks!
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    2,101

    york vs rheem?

    Two words

    American Standard
  50. Replies
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    2,101

    Go with Rheem!

    Go with Rheem!
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