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  1. Replies
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    6,187

    http://jobview.monster.ca/First-Year-Apprentice-HV...

    http://jobview.monster.ca/First-Year-Apprentice-HVAC-Refrigeration-Mechanic-Local-516-Burnaby-BC-Job-Vancouver-BC-CA-100087288.aspx
  2. Replies
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    858

    I usually look for 105F sat cond. temp (converted...

    I usually look for 105F sat cond. temp (converted from head pressure for type of refrigerant)
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    1,590

    Oh!....I like to go swimminn.....

    Oh!....I like to go swimminn.. with...bowl...legged ....womenn.....

    I'll show yah a scar chief......
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    1,809

    OUCH....... Now could that be considered an...

    OUCH.......

    Now could that be considered an 'extra'.....:angel::whistle:...or an 'upgrade'
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    1,809

    They are switching an ac load--24vac fan relay...

    They are switching an ac load--24vac fan relay coil.

    Manufacturer of heatpump is Mammoth (17 yrs old).Conventional terminals y=comp contactor coil , o=rev valve solenoid , g=fan relay coil.
    ...
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    1,809

    T7350 communicating stat

    Anyone ever see these holding the loads on (triacs).
    I have a heatpump building that just got 100 of these installed (ddc job),I've been getting numerous calls of blower fans not shutting down at...
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    841

    Any chance that oil is logging in the switches or...

    Any chance that oil is logging in the switches or capillaries leading to the switches,causing intermittent hydraulic trip.Had it before if take-offs were pointed downward.
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    http://www.engineeredair.com/manuals/0fu3ylKGTrac2...

    http://www.engineeredair.com/manuals/0fu3ylKGTrac2%20Manual%203-99%20R1.pdf

    This should be it.You can also call the Calgary office,they have excellent tech help,ask for Allen Chow (Choi?)....
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    836

    Had a building that used one of their products...

    Had a building that used one of their products that did what you might want.

    http://www.act-solutions.com/ICC/ICC.shtml

    It may have been this one controlling the maxitrol modulating vdc gas...
  10. Replies
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    1,100

    Thanks for the responses.

    Thanks for the responses.
  11. Replies
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    1,100

    jci metasys problem

    Hey all.I have a customer where I take care of the mechanical and he so far has taken care of his own controls (JCI NAE metasysis, approx 2004).He has a problem with a module and probably needs to...
  12. Thread: VAV

    by bc guy
    Replies
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    930

    Have you tried Pacific Controls down near 2nd and...

    Have you tried Pacific Controls down near 2nd and cambie?
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    510

    Also sometimes an oil safety trip may not have...

    Also sometimes an oil safety trip may not have anything to do with oil.
    If the control cct calls for compressor but it does not start or trips out,your oil psi switch can still time out and trick...
  14. Thread: VAV

    by bc guy
    Replies
    10
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    930

    This link gives a decent explanation. Also try...

    This link gives a decent explanation.
    Also try to get your hands on the Honeywell gray engineering manual of building control.
    Local control suppliers can get it for ya. (since you wont come back...
  15. Thread: wiring diagram

    by bc guy
    Replies
    3
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    1,309

    If your a tech,stop by your local refrigeration...

    If your a tech,stop by your local refrigeration supply house...they will give you the little copeland booklet with all the wiring diagrams.
  16. Replies
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    They are very common here in heatpump...

    They are very common here in heatpump buildings.They also seem to be very reliable but if you have the older original version then programming may be slightly different....I havent seen one in a long...
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    I don't have a manual handy but as far as I know...

    I don't have a manual handy but as far as I know to check programming:

    -switch dip switch at upper centre part of board to SET
    -hold down small black button beside respective stage relay to view...
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    http://www.airbalancingco.com/vav_systems.html ...

    http://www.airbalancingco.com/vav_systems.html

    A good tutorial on vav's
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    Moneywell.......................spent.

    Just a brief thought......

    Iv'e been with the big red H for almost a decade.I'm not an auto tech but a field ref. mechanic.

    Which basically means that you are a mongrol cross between Sherlock...
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    We have a high rise care home with a two pipe...

    We have a high rise care home with a two pipe system.Three way diverting valve & actuator controlled by ddc does switch over.Not ideal but seems to work ok.
    If design,piping and controls are done...
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    Not sure how they calculate it but i think the...

    Not sure how they calculate it but i think the formula is:

    E (voltage)=I (amperage) x Z (impedance)

    High impedance lockout relay coil ends up in series with contactor coil or other load,reduces...
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    1,413

    Yes,it is to prevent freezing in winter. This is...

    Yes,it is to prevent freezing in winter.
    This is all for a/c..no process at all.They will not be operating the chillers all winter but they don't want to drain loop.
    Thanx for the responses.
  23. Replies
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    1,413

    Chiller loop--Converting H20 to glycol?

    I have an institutional building with a primary chiller loop,two 50 hp circ pumps running together in parrallel,on freq drives with a mix of two way and three way cw mixing valves at the airhandlers....
  24. Thread: Honeywell T7300

    by bc guy
    Replies
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    2,000

    Page 16. ...

    Page 16.

    http://www.honeywell.com.pl/pdf/automatyka_budynkow/automatyka/T7300.pdf
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    I've seen them in there,factory wired and noted...

    I've seen them in there,factory wired and noted on the factory wiring diagram.I was told by our local Eng-air field service tech at a training seminar that their heaters were installed in cold...
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