Air Handler Equipment DDC Controllers | HVAC Control
Air Handler Equipment DDC Controllers – These controllers will control an air handler once the wiring is completed. The panel is freshly mounted and waiting for the technician to run the piping and pull the wire from the control points. Other points, such as outside air, temperature sensors in piping or duct work, flow meters, actuators, or other control points can be terminated to these controllers and the data collected from those input points can be networked over the entire building automation system through the communication trunks. Included in this panel are: a terminal strip connection point for line voltage and control voltage, a transformer to step-down line voltage to the required control voltage of 24 volts which powers the controllers and a surge arrestor which is a requirement on many government jobs.
Condensing Unit Frozen Wont Turn Off
What you can expect to learn from Condensing Unit Frozen Wont Turn Off article: this article is an answer from a question taken from our email by a visitor to High Performance HVAC. We often use the questions we get in the email as a guide to write articles. The topic is a condensing unit that will not turn off and it is freezing up. From my experience in the field and using my HVAC knowledge I offer the readers a list that could cause this problem. We hope it helps you.
What’s the possible problem with a frozen air conditioner condenser that won’t turn off except with the breaker?
Related Link: Here is a similar but different problem with a frozen air conditioner.
The Answer for frozen air conditioner condensing unit that won’t turn off –
There are 3 possible problems with this unit and will probably need the attention of an HVAC Technician for repair. Here’s the 3 possible problems:
Air Conditioner Ductwork Leaks
A good consideration when replacing the air conditioning system is the duct work.
Red Arrow Shows a Duct Work Leak
Duct work seems to be the most ignored part of an HVAC system but is a very important consideration in this age of new technology and higher energy efficient equipment being developed and manufactured. You can have the most energy efficient engine but if its in an old 60 or 70’s model car your efficiency is going to suffer. The same is true with HVAC systems. You can have the most energy efficient compressor available on the market but if your duct work is leaky or your house or business is not properly insulated that high efficient system you just spent big dollars on is wasted money. For more insight on HVAC ductwork see the High Performance HVAC Ductwork Page. (more…)
Air Handler Components 3: Hot Water Coil Heat
Air Handler Components 3 – Hot water coils inside of air handler units combine a boiler system or a special capacity hot water heater and forced air to provide forced-air heating. The concept is simple and used a lot in commercial and some in residential. Commercial systems almost exclusively use a boiler to provide hot water to the hot water coil inside the air handler unit while the residential systems use mainly special capacity hot water heaters to provide hot water to the hot water coil inside the air handler unit. On a call for heat a pump is energized to begin the circulation of hot water from the heating source to the coil. The air handler unit blower motor energizes and air begins to move across the coil. Heat is exchanged from the hot water coil to the air and the air is delivered to its appropriate destination through the ductwork.
Pricing New Air Conditioner – We get emails on a regular basis asking us about prices for a new air conditioner, heat pump system, boilers, and other types of HVAC systems. This article addresses those questions and why it is nearly impossible to give anyone an estimate for a new system through email or forum without first looking at the house and other factors involved with giving someone a price. (more…)
Air Conditioner Condensate Problems – It is important for air conditioning preventive maintenance to be performed on your system to avoid problems. Condensation water leaking near the air handling unit can be avoided with proper air conditioning repair and preventive maintenance. Normally this is a very simple problem that can be fixed in less than 30 minutes. Here is a list of what can cause water around the outside of the air conditioning air handler unit.
This is a brand new installation and the duct work was leaking. Older duct work definitely leaks and can cause a dusty environment
Trane Air Handler Making Dust | HVAC Troubleshooting
I would appreciate from some one in Trane organization that would please tell me why since installment and still 5 years later my house is nothing to a dust pit. I am not exaggerating. You can wipe dust blankets DAILY off my walls, floors, furniture. I have been since installation for someone to help me. My original installer put a filtering system “like used in coal mines” – did not help. I have had independent HVAC inspectors who cannot understand nor have any reasoning for the dust. One thing was that the original TRANE installer did not put sufficient air return duct in my house.
CAN SOMEONE HELP OR AT LEAST GIVE ME AN ADDRESS/TELEPHONE NUMBER WHERE I CAN CONTACT THE MAKER/OWNER OF TRANE?
HVAC Inspections and Commissioning
How often have you heard someone complain about inspectors or code officials whose job it is to inspect mechanical, electrical, plumbing, and other trades work for safety and quality workmanship? One could argue that workmanship or even design can be horrible and the work pass a code inspection but chances are if the trades have any integrity they want the job to look good whether it is for the inspector or whether it is for pride and quality of work. It is not only good for the tradesman but it can make the inspection of the job better and smoother for everyone. That brings us to the purpose of this article. There are many homes and commercial buildings out there with HVAC equipment systems and duct work that has never been inspected for either safety and health or even quality workmanship and yes there are problems created by this lack of quality in the workmanship of the HVAC equipment installation and duct work and dare say safety, energy, and health issues. All three issues are increasingly important today. (more…)
Magnehelic Duct Pressure Sensor – The magnehelic measures duct pressure inside of ductwork. It is important, for many reasons, to know the pressure inside of duct work. This magnehelic measures the supply side pressure of the blower inside the air handler. The static pressure in this system is actually controlled by a static pressure transducer which is directly hooked up to a DDC controller that controls a variable frequency drive based on static pressure. The static pressure transducer is a solid state magnehelic and works in much the same way a magnehelic works except the transducer is digital and sends out a signal that registers the pressure it is reading. The magnehelic pictured is simply for visual display and reading the static pressure inside the air handler. It does not send out any signals. (more…)
Bad Ductwork – Ductwork is necessary to deliver the air throughout the HVAC system. It is important that the system has integrity with no leaks. Duct work is made of different materials. Duct systems also have different construction methods which hold the ductwork together.
Pictured above is an old ductwork system (which needs to be replaced) made of duct board, which is a rigid fiberglass board, and flex duct work. The duct board is cut to size from the duct work sizing requirements for tonnage and taped together with special duct tape. For the branches coming off the duct board trunk, metal collars are inserted into holes cut to size in the duct board. Flex ductwork is attached to the metal collars for the branch ductwork. (more…)