@Drazen HAP is definitely a more complex and robust HVAC load calculation program than Taco. Also, Taco just has weather data for Canada and USA. However, what cannot be overstated is that either program can just as easily mess up a load calculation if the engineer doesn't understand how to...
@RRA1990 download the Taco-Load Calculator since it is a MUCH easier load-calc program to use than HAP. It's also free. Also, download the McQuay (now Daikin) pipesizer, ductsizer, and psychrometric analyzer since these tools are free and easy to use.
Get a copy of the 1996 Trane Air...
Another point that was brought to my attention was to monitor the stack temperature. There is some literature that indicates condensation could form in the stack below 250F and accumulate on the tubes. We ran large scotch marine boilers during the summer at extremely low firing rates since our...
Just wondering if it is common for scotch marine fire tube boilers to have tube leaks within the first one-two years of operation. Is there a typical timeframe where you would expect the first tube leaks to occur? Would it be more of an operational fault (short cycling or thermal shocks?) or...
The DOE Federal Energy Management Program published Operations & Maintenance Best Practices Release 3.0 which has a boiler checklist with maintenance frequency. Very useful and can be downloaded from the link below...
Are there typical integrity tests for underground electrical sub-feeders (insulation, supports, etc.?) Or should you just plan to survey/inspect each vault and repair whatever is visible?
Aside from specifying a water sealant, what are other ways of waterproofing pipes that penetrate an underground sump pit? Would flanges on either side of the pipes be the answer? Also, with an underground concrete vault, should additional drainage pipes or pressurized slab be specified to...
Does anyone have any success rebuilding the insides of an older boiler? New tubes and tubesheets would be installed and followed up with a hydrostatic test, but I'm skeptical that that 30 year old boiler with new controls on it will continue to break down.
Where in the ICC or NFPA does it talk about ventilating mechanical shafts? Does this only apply to high rise buildings because of stack effect? I know about specific ventilation requirements for elevator shafts, but not mechanical shafts.
For direct injection humidifiers, is there usually a condensate return line back to the clean steam generator? I always thought the condensate was minimal enough that it could be routed to a floor drain and if any hot condensate (>140F) concerns came up, you could put a cooling leg (4 ft of...
