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  1. Nu-Calgon liquid scale remover turns purple (Neutralizes) fast

    Never had this problem for Two years at the same site
    There is a very
    slight chance the tech performing the sealed Copper tube condenser cleaning with the
    Nu-Calgon scale remover .
    may not be...
  2. Nu-Calgon liquid scale remover turns purple (Neutralizes) fast

    Never had this problem for Two years at the same site
    There is a very
    slight chance the tech performing the sealed Copper tube condenser cleaning with the
    Nu-Calgon scale remover .
    may not be...
  3. configure the Honeywell S7760A. command Display

    does anyone have any literature
    for configuring the Honeywell
    S7760A Command Display.
    I am using Lonspec 05.01
    Thanks
  4. Temperature of Air when air balancing

    we often have air balance contractors
    balance our new sites minus compressors, and minus forced air heating ability
    Often because the condenser water system, or the heating plants are not yet...
  5. Replies
    0
    Views
    615

    i2867 Terminal Controller

    Continuim unitary controller ( i2867 Controller)
    I know that Andover's infinet network is Modbus on a RS-485 interface.
    I have a Siemens SITRANS F flow meter, with a three terminal Modbus card, ...
  6. Replies
    10
    Views
    1,634

    oBIX Open Building Information Xchange

    I probably have used systems that utilize it, it may be transparent.
    I briefly understand that it provides web services for
    direct digital control systems.
    I have John FX jace's that I can access...
  7. Replies
    3
    Views
    2,041

    Condenser water inline booster pumps

    I have a new site with a six story building.
    Water cooled units on each floor
    The Computer room A.C. (CRAC) units 2 - 3 tons each have
    Condenser water in line booster pumps coming off the main ...
  8. Replies
    12
    Views
    2,820

    sorry about that q= 500 x GPM x Water Delta T

    sorry about that

    q= 500 x GPM x Water Delta T
  9. Replies
    12
    Views
    2,820

    I am sure you know this already, but I have...

    I am sure you know this already, but
    I have seen (professionals),
    and simple guys such as myself
    get themselves in alot of trouble,especially when they were providing
    sub metering.
    Make sure...
  10. Replies
    4
    Views
    924

    As per the AOP Rules only Professional Members *...

    As per the AOP Rules only Professional Members * can reply with advice to the OP. Anyone may post and ask questions. They may even question the * member answer but not give advice or expand on the...
  11. Replies
    2
    Views
    829

    Two finn tube coils clog up

    I do not know if there is a technical name for it or if there is an engineering
    description of the cause of it.
    It appears that there will be a good deal of power washer time ahead for us.
    I...
  12. Replies
    1
    Views
    706

    Thinner tube walls on coils

    Copper Finned tube water coils use a thinner tube wall
    I gather this is to facilitate heat transfer.
    We have free cooling coils that have water pressures as
    high as 160 P.S.I.
    Besides being...
  13. Replies
    14
    Views
    905

    assuming your gauges are good , the pump is...

    assuming your gauges are good ,
    the pump is turning the right direction and
    you also measure amps with an amp probe.
    I have seen mechanical propblems with a pump , internal bypassing
    ,pump...
  14. Replies
    14
    Views
    2,327

    Demand response control is growing into a big...

    Demand response control is growing into a big industry.
    I would like to see a section here on this site.
    Benchmarking and sub metering is gradually becoming law
    in many parts of the country.
    It...
  15. Replies
    8
    Views
    2,712

    That is a tall order. I started controls with...

    That is a tall order.
    I started controls with all electromechanical logic.
    Years ago ,I had to make a control sequence of operation using
    relays ,contactors,solid state time delay relays,lock out...
  16. Replies
    2
    Views
    927

    Prouduct names and logos

    I noticed a case of this today,again ,at the Carrier supply house.

    I will see a Honeywell T-Stat with a carrier or even a Trane logo on it.
    Before Johnson purchased York,I would find JCI...
  17. Replies
    14
    Views
    1,686

    Excuse me for the mistake. Very sorry that is...

    Excuse me for the mistake.
    Very sorry that is what I get for reading only a couple of words of a post.
    Yes although I do not do much of the residential anymore
    (some very happy memories)
    we use...
  18. Replies
    14
    Views
    1,686

    I think it is over kill and may harm your...

    I think it is over kill and may harm your compressor

    For cooling and heating with a heat pump you still need
    that minimum C.F.M. of 1,200 400*3tons
    Run the fan too slow and you will slug...
  19. Replies
    2
    Views
    764

    Shut off #6 oil transfer pumps

    We are no longer usig the boilers for Summer, but maintenace still
    wants to run the two transfer pumps year round,24/7 ,
    to constantly keep
    the # 6 heating oil traveling through the...
  20. Replies
    1
    Views
    622

    Free cooling to the last drop

    Is this posible?
    can Cooling tower condenser water produce any cooling moving through a free cooling coil if the Condeser water is about five degrees lower than
    the Return Air Temperature?
    But,...
  21. Replies
    1
    Views
    806

    Technologic 5500 Pump controller

    I have a B&G Technologic 5500 Pump controller.
    It controls water Differential pressure by controling pump speed
    through the V.F.D.'s
    It is conected to a Kele differential pressure transmitter
    It...
  22. Anti corrosion inhibitor with Polymer

    Our chemical people are using an Anti corrosion inhibitor with a polymer
    They are emphasizing the point that
    it has "tags"
    that allow them to track the effectiveness of changes in the dosage.
    How...
  23. Replies
    5
    Views
    1,069

    I think this is what you are looking for

    I think this is what you are looking for
  24. Heat Timer Gold Short Cycles Boiler

    Sometimes The outdoor temperature reading keeps keeps bouncing up and down
    within one degree of the setpoint call for heat.
    The outdoor air temperature will equal the setpoint temperature for a a...
  25. Replies
    4
    Views
    489

    Heat Timer Gold Short cycles

    Sometimes The outdoor temperature reading keeps keeps bouncing up and down
    within one degree of the setpoint call for heat.
    The outdoor air temperature will equal the setpoint temperature for a a...
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