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 ductwork, 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 is Frozen and Wont Turn Off
High Performance HVAC Air Conditioning & Heating: Condensing Unit is Frozen and won’t Turn Off
Condensing Unit is Frozen and won’t Turn Off
What’s the possible problem with a frozen air conditioner condenser that won’t turn off except with the breaker?
The Answer for frozen air conditioner 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:
A good consideration when replacing the air conditioning system is the duct work. 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. Continue reading “Air Conditioner Ductwork Leaks” »
Air Handler Unit Components: Hot Water Coil Heat
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.
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. Continue reading “Pricing New Air Conditioner Cost Price for New Heat Pump” »
Labor time (approximate): 1 hour in some cases, several hours in others
It is important for 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.
- The black insulation (called Rubatex) has a tear in it or doesn’t cover the entire suction line. This line normally (in Air Conditioning air condition mode) operates below the dew point and will sweat if it is not insulated. It must have a sealed vapor barrier to be effective.
- The insulation surrounding the air handler supply transition or ductwork is torn. The supply transition and duct can operate (under the right conditions) below the dew point and sweat. It is important that the transition have a vapor barrier around it. This scenario is especially true for those that have over sized units.
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?
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 workmanshipof the HVAC equipment installation and ductwork and dare say safety, energy, and health issues. All three issues are increasingly important today. Continue reading “Inspections and Commissioning – Building & Energy Codes” »
The magnehelic measures duct pressure inside of ductwork. It is important, for many reasons, to know the pressure inside of ductwork. 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. Continue reading “Magnehelic Duct Pressure Sensor – Magnehelic Duct Static Pressure” »
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. Continue reading “Duct Systems and Bad Ductwork” »