Search:

Type: Posts; User: bradluke0

Page 1 of 3 1 2 3

Search: Search took 0.02 seconds.

  1. Replies
    12
    Views
    1,296

    Can you post a hand drawn schematic or something...

    Can you post a hand drawn schematic or something similar?
  2. Replies
    3
    Views
    672

    I would rather see a real balancing valve also ,...

    I would rather see a real balancing valve also , problem is you still typically need a check valve and its cheaper just to put a triple duty valve in .
  3. That Fluke is a really nice meter . Expensive ,...

    That Fluke is a really nice meter . Expensive , but cheap meters are expensive too in their own way .
  4. Be careful with setting a chiller by DP . You...

    Be careful with setting a chiller by DP . You need to use the chiller chart and not a calculated minimum pressure drop from the maximum flow as some chillers are "turbulent flow " and the fluid laws...
  5. Replies
    28
    Views
    3,007

    The lo flow hood from Evergreen is bad ass . Its...

    The lo flow hood from Evergreen is bad ass . Its not cheap though .
  6. Replies
    7
    Views
    943

    Also , be very careful of pulling down anything...

    Also , be very careful of pulling down anything on the return / outside side of any fan coil or ahu . If you create too much suction pressure the negative pressure will not allow the trap to drain ....
  7. Replies
    6
    Views
    1,104

    The practical exam stumps most of the guys . They...

    The practical exam stumps most of the guys . They are good at the theory but have a hard time hooking up a water meter properly . Part of the exam is a small pump and a hand full of circuit setters ,...
  8. Replies
    27
    Views
    3,032

    I have so many stories its nuts . Here's another...

    I have so many stories its nuts . Here's another ...We were working down in Homestead , FL on a joint military listening / planning center . We had to work nights as there was just too much action...
  9. Replies
    27
    Views
    3,032

    I have so many stories its nuts . Here's another...

    I have so many stories its nuts . Here's another …...We were working down in Homestead , FL on a joint military listening / planning center . We had to work nights as there was just too much action...
  10. Replies
    27
    Views
    3,032

    I unscrewed the cap off a pete's plug once and...

    I unscrewed the cap off a pete's plug once and the whole thing unscrewed from the pipe . I wasn't paying attention at the time but I can say it never happened again .
  11. Replies
    34
    Views
    2,857

    Its good to see they followed though . I am a bit...

    Its good to see they followed though . I am a bit disappointed in one respect though , I still think its better off wide open and let the 2-way control valves do their thing . BTW.....Many years ago...
  12. Replies
    29
    Views
    2,121

    OOPS , I got distracted a few times and didn't...

    OOPS , I got distracted a few times and didn't process that this was a domestic system . My post above was meant for a closed system with reheat coils. Sorry dudes !
  13. Replies
    29
    Views
    2,121

    The very first thing I would check on this system...

    The very first thing I would check on this system is the make-up water pressure . The easy way is to get to the highest and furthest point away from the pump and take a pressure on top one of the...
  14. Replies
    16
    Views
    1,837

    The other thing I should mention is over the...

    The other thing I should mention is over the years we have stopped working for certain contractors that do a crappy job and don't want to pay . One goal we should ALL have is improving the quality of...
  15. Replies
    16
    Views
    1,837

    They are going to complain and try not to pay . I...

    They are going to complain and try not to pay . I stick to my guns and provide time sheets to back up the lost time . All time sheets are considered a federal document which you don't want to mess...
  16. Replies
    27
    Views
    3,032

    ^^That is a bit of a hindrance to...

    ^^That is a bit of a hindrance to airflow....haha. I was working in a JC Penny store horsing around a 14' wooden ladder . The store was almost ready to open . I was moving the ladder and got a bit...
  17. Replies
    34
    Views
    2,857

    I guess I am dumb , I cant figure out how to pm...

    I guess I am dumb , I cant figure out how to pm you . PM me your # and I'll call you .
  18. Replies
    34
    Views
    2,857

    I will pm you with my number later on ….give me a...

    I will pm you with my number later on ….give me a shout .
  19. Replies
    6
    Views
    1,207

    I knew you had it but couldn't quite spit it...

    I knew you had it but couldn't quite spit it out....hehe.
  20. Replies
    27
    Views
    3,032

    One quick one.....In my truck I always carried...

    One quick one.....In my truck I always carried toilet paper and one of those old service phones that had the two wires with alligator clips on them . Every building had a phone room . Walk in , clip...
  21. Replies
    27
    Views
    3,032

    In my experience people don't usually complain...

    In my experience people don't usually complain when the system is working with the proper setpoints . Good story......Went to a GTE ( General Telephone ) job many years ago when all we had was...
  22. Replies
    34
    Views
    2,857

    What I meant about setting each floor by return...

    What I meant about setting each floor by return temperature was using the main valves to each floor , one adjustment only to get the return water from each floor the same temperature . ( glad this...
  23. Replies
    16
    Views
    1,837

    The other thing you can do is put the dampers in...

    The other thing you can do is put the dampers in general on a punch list . My punch lists state they have to sign it off before we return and its one return trip only . After that its T&M .
  24. Replies
    6
    Views
    1,207

    The worst case ( which Wayne discusses in his...

    The worst case ( which Wayne discusses in his post above ) is what we call "breaking the back of the fan ". Kind of hard to explain but here goes....Say you are looking at the side of a fan and it is...
  25. Replies
    34
    Views
    2,857

    Since you have a VFD I would set the total to...

    Since you have a VFD I would set the total to each floor by the return water temp . Then you can play with it a bit to find the DP setpoint for the VFD . Being you have infinite control of the pump I...
  26. Replies
    16
    Views
    1,837

    When we have this problem I have the contractor...

    When we have this problem I have the contractor go in front of us and check every one of them . Most times their guy will work with us and adjust the dampers as we balance. This kind of crap is what...
  27. Replies
    34
    Views
    2,857

    On the one that you had to reduce the primary...

    On the one that you had to reduce the primary minimum airflow down , why not just let it go to zero ? There are enough boxes that have minimums to provide ventilation so I wouldn't hesitate to do...
  28. Replies
    34
    Views
    2,857

    Slowing the loop speed down will help a bunch...

    Slowing the loop speed down will help a bunch with the hunting . Most all loop speeds are way too fast anyway as the control guys want to see stuff move when they change a setpoint . The problem is...
  29. Replies
    34
    Views
    2,857

    Is this a multiple story building ? How many...

    Is this a multiple story building ? How many boxes and coils are you dealing with? The reason I ask is you maybe better off not balancing each coil and letting the two way valves do their thing ....
  30. Replies
    34
    Views
    2,857

    Sounds like an interesting job. Are these series...

    Sounds like an interesting job. Are these series or parallel boxes? Will the hwc's produce a useable leaving air temperature ? Are the hot water control valves 2 or 3 way? Sizing the control valves...
  31. Replies
    19
    Views
    1,643

    It would be nice if the OP would follow up here...

    It would be nice if the OP would follow up here so we could all see where this is going.BTW....lots of good advice given above .
  32. Replies
    2
    Views
    2,740

    I prefer the Alnor and Evergreen for air and...

    I prefer the Alnor and Evergreen for air and Shortridge for water . When balancing air the guys like the blue tooth connection to their phones with the Alnor and the wrist reporter with the Evergreen.
  33. Replies
    19
    Views
    1,643

    Wayne is correct. Is this steam or hot water?

    Wayne is correct. Is this steam or hot water?
  34. Replies
    2
    Views
    1,091

    I have been out of the field for a while and have...

    I have been out of the field for a while and have never seen this particular valve . I can find out on Monday from my sources. Let me know if you need me to do that .
  35. I worked for a company many years ago that wanted...

    I worked for a company many years ago that wanted to pay me $40,000 with a year end bonus to increase that to around $60,000 ( this is Florida so the numbers are lower than almost anywhere ). I knew...
  36. Replies
    17
    Views
    2,880

    How about the part where my buddy had to traverse...

    How about the part where my buddy had to traverse 75 100cfm exhaust fans? Nobody sees a problem here? In my opinion when you make your competitor do something like that it's only to waste his time ,...
  37. Replies
    17
    Views
    2,880

    The problem with attacking the commissioning guys...

    The problem with attacking the commissioning guys is that the owners back them all of the time . Some of them have been commissioning and balancing for a long time so they are not newbies . They are...
  38. Replies
    20
    Views
    995

    If I didn't know the technical side of the...

    If I didn't know the technical side of the business , there is no way I would get involved .
  39. Replies
    24
    Views
    3,036

    If the submittal or other documentation says 6000...

    If the submittal or other documentation says 6000 cfm minimum then there may be a good reason for that . It would be nice to have a sequence of operation that spells out what is supposed to happen ....
  40. Replies
    14
    Views
    2,431

    Good work but just use the linear way . New hertz...

    Good work but just use the linear way . New hertz old hertz x old rpm = new rpm .
  41. Replies
    14
    Views
    2,431

    Icy nailed it . Also, is this unit on a vfd? If...

    Icy nailed it . Also, is this unit on a vfd? If so , you can measure the rpm once and calculate the rpm from the hertz of the vfd at different settings.
  42. Replies
    24
    Views
    3,036

    Looks like you are getting somewhere . If you can...

    Looks like you are getting somewhere . If you can unload all the way to 16% then your theoretical minimum would be right around 2000 cfm . 4300 cfm for a minimum has plenty of safety built in . 6500...
  43. Replies
    24
    Views
    3,036

    Has anything been determined here yet ?

    Has anything been determined here yet ?
  44. Replies
    24
    Views
    3,036

    Why is it taking 3" of static to get the correct...

    Why is it taking 3" of static to get the correct air through the boxes? Are there manual dampers in front of the boxes ? Are the down stream dampers at the air distribution partially closed ? ...
  45. Replies
    24
    Views
    3,036

    Good going . I would take that new duct pressure...

    Good going . I would take that new duct pressure sensor and install it closer to the unit instead of way at the end . Like Wayne said if the minimums are 10-15% they need to be raised . If there is...
  46. Replies
    30
    Views
    3,041

    I have never tested a pump running backwards so...

    I have never tested a pump running backwards so this is a new one on me...propeller fans and the like are a different animal.
  47. Replies
    24
    Views
    3,036

    The chart needs ESP and fan RPM to determine...

    The chart needs ESP and fan RPM to determine airflow. Is this a draw through or blow through unit ? With 2.3" of supply static and the flooding back , you are low on airflow . Your VAV boxes are not...
  48. Replies
    30
    Views
    3,041

    40 - 60 % when running backwards .

    40 - 60 % when running backwards .
  49. Replies
    14
    Views
    1,427

    The responses you have already received have...

    The responses you have already received have pretty much nailed it . The only thing I can add is don't believe any readings you see on the DDC system . Take some baseline readings and check the...
  50. Replies
    11
    Views
    1,792

    You can have return air in OR's. The filter...

    You can have return air in OR's. The filter requirements are different if you have return air or exhaust air .
Results 1 to 50 of 107
Page 1 of 3 1 2 3
Contracting Business
HPAC Engineering
EC&M
CONTRACTOR