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  1. Replies
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    I had this to happen to Carrier RTU HP in 1998...

    I had this to happen to Carrier RTU HP in 1998 when the power company changed out a transformer. The unit ran for several days in that condition and after corrected it is still in use today. Hope you...
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    I have 25 years of experience in buildings with...

    I have 25 years of experience in buildings with planned infiltration and it can cause some huge humudity issues in my area. It happens mostly in the warmer months but can happen in the winter if...
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    I am not sure you need another service person...

    I am not sure you need another service person right now until the cause of your problem is diagnosed. Your problem seems to point to excess infiltration of outside air but that cannot be determined...
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    If you are going to hire an Indoor Air Quality...

    If you are going to hire an Indoor Air Quality investigator be very carefull because this industry is not regulated in our state. There are both good and bad players out there. All will say they are...
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    I would agree with what you came up with. My...

    I would agree with what you came up with. My Fluke when set to Ohms defaults to impedence so when it detects voltage it will put 2 ohms of resistance on the reading and display the voltage, not...
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    Did the outside unit for the 2 head system have a...

    Did the outside unit for the 2 head system have a variable speed compressor and fans as opposed the other system being more conventional?
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    Slowing the fan down is a good idea provided your...

    Slowing the fan down is a good idea provided your confident the coil won't ice up. Be carefull in trying lower temps. to solve humidity issues. If the unit is oversized, which most are, it could have...
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    A friend of mine in law enforcement recently told...

    A friend of mine in law enforcement recently told me that meth users will ignore all the passive protection methods and even if unarmed will get confrontational with anyone trying to challenge them....
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    That sounds like a mid-range WB/DB comparison. As...

    That sounds like a mid-range WB/DB comparison. As a general rule the higher the wet bulb comparison the higher the total performance but sensible will be lower. I personaly do not think your...
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    It is probably abused by those that have nothing...

    It is probably abused by those that have nothing to lose, but having income, property, investments, etc. generally keeps the rest of us honest.
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    I'm not sure how window units are marketed but on...

    I'm not sure how window units are marketed but on larger equipment the performance and EER are rated on an ARI standard at given entering wet and dry bulb temper and outdoor conditions. I am not sure...
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    Yeah, I've been involved in those negotiations as...

    Yeah, I've been involved in those negotiations as the buyer for my former employer. I think if you have enjoyed a lower a tax rate and are selling for the going commercial rate its time to pay up.
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    That seems to reflect my understanding of the...

    That seems to reflect my understanding of the law. If some developer offers me a bunch of money for it I will gladly pay the tax.
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    Have you ever heard of roll back taxes? That is...

    Have you ever heard of roll back taxes? That is the penalty I will pay if I sell my agricultural land for a non-ag. purpose in my state. I'm sure other states have similar laws, look it up and let us...
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    The problem with the Darwin analogy is that guy...

    The problem with the Darwin analogy is that guy went to a bar that night, went ugly early,got laid, the defective chromosones have been transmitted. Mankind is doomed.
  16. You may want to re-post this in the AOP forum and...

    You may want to re-post this in the AOP forum and get some feed back from contractors in your area. My grandparents had a really large house in Arlington Heights of the same vintage that had a forced...
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    I ran into the same thing with a Weil McLain a...

    I ran into the same thing with a Weil McLain a while back. We tried the JB Weld and about 20 other options before eventually going ahead and replacing the section.
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    Look on the manufacturers' web site or ask the...

    Look on the manufacturers' web site or ask the local distributor. I used to get interactive CDs whenever my local distributor hosted a training session by a manufacturer, but there was a small cost....
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    Are you sure you are in the HVAC biz. Frezone,...

    Are you sure you are in the HVAC biz. Frezone, what is applied ARI number? Rather than adding refrigerant all day, would not fixing the leaks prevent another O in the Ozone layer?
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    http://www.price-hvac.com/Catalog/Section_A/Custom...

    http://www.price-hvac.com/Catalog/Section_A/Custom_Flow_Linear/Adjusta_Jet_Slot_Continuous/AS_Adjusta_Slot.aspx

    I haven't worked with that brand before but if its like the ones I've used in the...
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    Thanks for posting that info. My Manual J is 7th...

    Thanks for posting that info. My Manual J is 7th Edition and doesn't have that in it. May be time to start updating the library. What my supplier is getting me info. on is a diffuser that is longer...
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    I was talking to my equipment supplier about the...

    I was talking to my equipment supplier about the same issue yesterday. He is getting me some info. on some supply registers that will compensate. He does not stock them for obvious reasons. BTW, re:...
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    That is interesting. The duct system part of it...

    That is interesting. The duct system part of it makes sense to me. Whenever I draw up a duct system using equal friction I end up with a larger main branch than what is typically installed around...
  24. Thread: Goodman

    by jburchstead
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    3,149

    Didn't the Goodmans' sell out around 2005? That...

    Didn't the Goodmans' sell out around 2005? That seems about the time their equipment started to pick up in QC department.
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    Thanks beshvac for the reply. I have had a change...

    Thanks beshvac for the reply. I have had a change of heart on this job. I have a lot of respect for the builder and after some discussions I will throw him a number. BTW, my sister lives in...
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    Thanks for the reply. I'm totally with you on the...

    Thanks for the reply. I'm totally with you on the ramifications of oversizing. I was asked to quote a 3700 SF 2 story resi. The total load came to just over 26MBH after throwing everything the ACCA...
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    Sizing-Rules of Thumb vs. Load Calcs.

    I'm interested in seeing if any of you are running in to the same problem I am when sizing packaged or mated split systems. When you do a comprehensive load calcuation on a new build, they come up...
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    I've run in to the same situation with run...

    I've run in to the same situation with run contactors. Thank you NAFTA!:gah:
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    Solar gain, planned infiltration, region? It's a...

    Solar gain, planned infiltration, region? It's a tedious math drill but as long as you understand U x A Delta/T and have the resources (tables) for duct and pipe sizing you can do it.
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    If you are trying to remove the load with...

    If you are trying to remove the load with ventilation and maintain a constant temp, I don't think you are going to achieve it with constant volume. You will probably need a thermostat in the space...
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    That formula looks like what you would use to...

    That formula looks like what you would use to calculate CFM when you know the temperature rise. Here is another way to look at. DX cooling systems are generally sized at 400 CFM per ton. If you...
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    Are you installing a branch duct or balancing an...

    Are you installing a branch duct or balancing an existing? Either way you will need total CFM and BTU for the air handler.
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    Based on the information you have provided I...

    Based on the information you have provided I think you are looking in the lower fractional range. As previously posted, more information is needed.
  34. Replies
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    I think the previous posters have given you some...

    I think the previous posters have given you some good advice regarding preventing short cycling and have also cautioned you as to the ramifications. If the supply temp. is critical to your dehumid....
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    Another thing to look for is make sure that it is...

    Another thing to look for is make sure that it is looking at entering and not leaving temp. as the control set point. Also the control strategy on the air side doesn't sound like process...
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    That eliminates a lot of other issues. The only...

    That eliminates a lot of other issues. The only other thing i can think of besides the control board would be a fan switch on the heat exchanger, if present.
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    Is the indoor fan an ECM or PSC motor?

    Is the indoor fan an ECM or PSC motor?
  38. Replies
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    CO2 vs. H2O?

    CO2 vs. H2O?
  39. Replies
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    Quote: Confused by your post. Ayn Rand was...

    Quote: Confused by your post. Ayn Rand was against any regulation like Glass-Steagle.

    I don't think so, I suspect this an attempt for humor??????

    Edit: I think we did not read each others post...
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    Quote: Ayn Rand had it right.....it's just a...

    Quote: Ayn Rand had it right.....it's just a question of how long before Atlas shrugs....

    Who ever posted that does't remember that after Glass-Steagle was reformed in 2000 that it it took 7 short...
  41. Thread: RFPs

    by jburchstead
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    787

    I think flange has given you good advise. What...

    I think flange has given you good advise. What you are requesting are "Professional Services" and may be dealt with differently than "Contracted Services" by your employer. Government agencies...
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    Thanks for the replies. It seems there are few...

    Thanks for the replies. It seems there are few easy answers any more. mbhydro I am going to try that. The local supply house told me they did not, but he may have been trying to sell me a new one.
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    Our Friends In Canada, question?

    This is not an HVAC question, but I have pallet jack that was manufactured in Canada with a broken handle pin. If I need to fab. a replacement from round bar would it be SAE or metric?
  44. I used to be in to school maintenace. At one of...

    I used to be in to school maintenace. At one of our High Schools we had a Trane sidewinder (R113) that when it got some air in it would make noises that sounded like an elephant. I was exiting the...
  45. Thread: Trane VAV

    by jburchstead
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    1,042

    I remember seeing those, but in that vintage i...

    I remember seeing those, but in that vintage i was dealing with spring rates and not stroke times...sorry. I don't think Trane was real big in to controls back then. They used a lot of Honeywell or...
  46. Thread: Trane VAV

    by jburchstead
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    1,042

    This may not be current but the last job I did...

    This may not be current but the last job I did with Trane VAVs they used Belimo operators. Typical stroke time was 35 secs. If it is a Belimo, they have all their tech. docs. on their website.
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    For commercial space, 1.5 CFM planned...

    For commercial space, 1.5 CFM planned infiltration per occupant is the guideline here. Not sure if that is ASHRAE driven or not.
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    Not saying that your problem is here, but I have...

    Not saying that your problem is here, but I have never seen a VFD that also required a starter and heater.
  49. Replies
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    That was a recommended fix from Trane on early...

    That was a recommended fix from Trane on early 2000 line of voyager RTUs.
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    Great advice.

    Great advice.
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