HVAC Connect
Video Comments
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Lascar Presents Downloading Data From Your Logger Tequipment.net Another example of a data logger temperature sensor which is a good tool to have if you are an HVAC technician.
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OCEASOFT New Wireless datalogger This is in French but it illustrates how some data logging wireless temperature and humidity sensors work.
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Home Maintenance : How to Balance HVAC Air Flow How many people close off vents to the detriment of their heating and cooling system?
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How to Install Your Own Furnace Heater BTW, I also sell my own book but I do not do it at the expense of someone else.
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Data Center Humidifier Adding plenty of moisture to the air to maintain a level of humidity in a space is very important in a data center. Does anyone know why?
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Page 1 of 3 Ask Mr. HVACAsk the Mr. HVAC Quickpage jump links:HVAC System On or Off when Unoccupied? Honeywell Chronotherm Plus 8624D Thermostat Problem Twinned Split System with a Single Air Handler Data Logging Thermostats1) Question: Is there a thermostat for a nursing home with a print out for temperature verification? There are a few options for you. The answer...... Home Inspector Training and High Performance HVAC2) Thank you!! I am training to become a home inspector and the info contained on this site is helpfull in identifing issues that require a HVAC professional to resolve. Read more........ Heat Pump Defrost3) Hi. I noticed my that one of my outside condensing units was laboring throughout the night. This morning I found ice/frost buildup on the radiator fins. I live in Tucson, Az. It has been colder than normal (below freezing) with a bit more moisture in the air than usual as of late. Can you please tell me what causes this frost/ice buildup, and how I go about rectifying? Does this mean that the condensor pump is shot? I'm originally from the midwest, and have never experienced this before. What should I be doing? Thank you for your help. The answer............... HVAC System On or Off when Unoccupied?4) Please confirm this advice if you would; it is better to have your thermostat left at 70 to 72 degrees during the day while your home is empty and adjust accordingly when you get home as opposed to shutting off the heater/ac and turning on when you get home. I would think this would put less strain on the unit. Thanks in advance for your help. The answer....... Learning HVAC Controls5) I want to learn about BAS and DDC. The answer.......... Honeywell Chronotherm Plus 8624D Thermostat Problem6) I have a Honeywell Chronotherm Plus 8624D running a Trane XL19i with a Trane XV90 - all installed new in new construction in 2003. Every winter, during the morning warmup from 66 to 70, the burners stays on for approx 1.5 hours at 70, then rises quickly to 73 before finally shutting off. The only way to interrupt the process is to turn the system to OFF at the theromostat. The system is on AUTO with the cooling set at 75 for the winter. I have swapped the thermostats (there are two sets in the house, this is the one in the attic for the second floor) with the same results. I have not swapped the thermostat circut boards, but I can not see a reason to. The main floor is on the same schedule, but has never done this three degree burst. I have had three different contractors out, with correponding charges, with no luck. Have you ever seen this? Any thoughts? Thanks! The answer............. Twinned Split System with a Single Air Handler7) Richard Very nice site! I have a question; my home was fitted out by the previous owner with a twinned system, and a thermostat (Totaline P374-1900) which was not designed to control discreet, paired units. I confirmed this with Totaline. The result is only one unit runs, and the second unit is never activated. It functions, but not automatically. Your website mentioned dual compressors in one system, and mine is similar, two independent compressor/condensers. Seeing the separate condenser units, I first thought the house was zoned, and later discovered both units feed into one Aspen BHA40 4-roll coil. Besides the issue of the wrong thermostat, I'm having problems finding an HVAC person who understands these hybrid systems and will service it. Is this configuration that uncommon? I live very near Houston Texas, so if you know of a local HVAC person with the skills to help me out - let me know. PS - I checked with Honeywell about the possibility of their thermostats working with my setup. They emailed me - they would only work with a HVAC professional. I thought this was strange since they sell them in the hardware stores. The answer............. |
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» How Air Conditioners Work | How Air Conditioning Works | Air Conditioner Operation
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How Air Conditioners Work
How air conditioners work is hot off the press and ready for you to learn how air conditioners work. Have you ever wondered how air conditioners work? No need to wonder any longer. High Performance HVAC will help you learn how air conditioners work. Check out our article on How Air Conditioners Work.
Boiler Maintenance
How important is boiler maintenance? Read the boiler maintenance page. Almost as if by rote many maintenance departments begin their annual boiler maintenance in late summer to get ready for the cooler weather. Does your department understand how important the code is or do they take all this for granted? Read More on the Boiler Maintenance Page

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