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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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    244

    I will post diagram tomorrow while im there.

    I will post diagram tomorrow while im there.
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    244

    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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    244

    Both fuses blown*

    Both fuses blown*
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    244

    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
    2
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    403

    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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    403

    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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    3,888

    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
    Replies
    18
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    4,658

    Ya randys a good teacher!

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

    by markmast
    Replies
    18
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    4,658

    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
  11. Replies
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    7,222

    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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    962

    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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    962

    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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    1,124

    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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    1,124

    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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    494

    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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    494

    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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    494

    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
    Views
    572

    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
    Views
    492

    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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    2,056

    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
    Views
    3,359

    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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