The Heating Season Begins…

As autumn progresses, daily temperatures begin to drop.  And so the heating season begins.  It’s that time of year when particular attention should be paid to making sure that your furnace is in good operating condition.  This means that the blower motor and burners should be thoroughly cleaned, old filters should be replaced, and the cyclic operation tested to make sure that everything works properly.  The cyclic operation is tested simply by turning up your thermostat to a temperature above the ambient where the burners should ignite and the blower motor should begin circulating air.  When the thermostat is turned down to a temperature below the ambient, the burners should turn off and the blower motor should also stop after a few minutes.  If you furnace is in a closet, make sure that anything stored in the closet that is combustible is removed and stored elsewhere or discarded.  If you will be using a gas logs unit, be sure that the burner and logs are free from dust and lint before using.  In addition, be sure that the unit is properly ventilated, your chimney damper is open or you have a window open to draw in air with a non-vented appliance.  Gas ranges are NOT intended to be used as heating appliances – please do not light all burners and keep it going indefinitely.  Carbon Monoxide can fill an enclosed room and become deadly.  Electric furnaces do not have this problem because they are not gas burning appliances.  However, heat can eventually cause wiring insulation to become brittle and short circuits can occur, leading to fires in homes and businesses.  When the heating demand is increased on boiler applications, pumps should be checked to make that water flow is not restricted and that all safety devices are operational.  Similarly, in geothermal applications water flow is critical in heat transfer between the heat source and the heat sink.  It is imperative that all piping, pumps and controls be inspected to assure proper operation and the prevention of loss due to fire.  Lastly, if you don’t know how to service your heating equipment, call a qualified service company!

2019 AHR Expo

Just returned from attending the Air Conditioning, Heating, and Refrigeration Expo held in Atlanta Georgia.  Some of the biggest names in the HVAC industry, such as Carrier, Trane, and York, were in attendance.  Along with cooling and heating equipment, those manufacturers that make specialty items such as boilers, compressors, piping, controls, motors and refrigerants were also in attendance.  Visitors, as well as vendors, came from all over the world to see new product lines as well as to showcase their products.  The trend, as has been the case for several years now, is to make machines more energy efficient.  Incorporating electronics to measure different parameters such as temperature and pressure, is now routinely done.  Depending on the type of equipment, manufacturers are also offering options on how the equipment is monitored.  Some owners prefer to let their on-site personnel keep up with the operation of their equipment while others are connected by internet to a servicing agency.

No matter how efficient or how well built a machine is, it will eventually fail.  Hopefully, when it does, there won’t be any property damage or personal injury.  But if there is,  the information collected during the Expo on various products will be invaluable in helping to determine the cause of failure and subsequent damage.  More specifically, the literature can be used to help identify a machine by model number, determine the pressure limitations, or establish the power requirements.

A Word About Fraud…

Every once in awhile a case comes along that has a little bit more intrigue than the run-of-the mill investigation. A few years ago, we were asked to look into why a man was injured while working on a scissor lift that had apparently gotten away from him. In order to understand what happened, it is important that one realizes that a scissor lift can be raised and lowered while in place or moved forward and backward. The controls for this particular lift were located on the side of the platform railing and were raised and lowered as the platform was raised and lowered. This particular lift had been rented from an equipment rental company by a construction company and as stated earlier, was in use at the time of the accident. Specifically, a construction employee was standing on the platform in a raised position while attempting to move the lift to his left. Upon releasing the control to stop the machine, the machine did not respond and eventually crashed into a forklift. As a result of this incident, the rental company, by its contractual agreement with the construction company, was expecting to be indemnified because the employee had filed suit against the rental company for his injuries.

After receiving this assignment, a trip was made to the rental company’s location in order to conduct an examination of the machine. At first, no restrictions had been placed on the examination. Upon arrival, it was learned from rental company representatives that the lift could not be operated, disassembled, or tested in any way. The examination was to be limited to taking photographs and making notes of observations. One of the photographs that was taken is shown below. The photograph shows the condition of the control panel as it was found during the first examination. Note the dirty appearance and the type of joystick used.

Approximately four months later, a joint examination was organized wherein various parties that had used or worked on the machine gathered to witness the testing and examination of the lift. The examination was begun with allowing all of the parties to photograph the machine. Although the machine had been photographed four months previous, the lift was again photographed. When the photographs were later reviewed and compared with the photographs taken at the first examination, it was then discovered that the control in place during the second examination was different form the control initially found on the machine. The appearance of the control shown below is the control that was on the lift during the second examination. Clearly, this control is different from the one shown in the photograph above. It then became obvious that not only had the control been replaced but, the only reason to replace the control was to hide the problem in the first control that most likely caused the accident. Once the lawyers were made aware of the switch, the claim for indemnification by the rental company soon disappeared. Presumably, the lawsuit filed by the employee against the rental company was settled.

Although fraud exists, even in civil cases, it is fairly hard to prove. This aforementioned case was more the exception than the rule. Over the past 30 years, I have had several cases where I thought that something was missing or there was more to the situation than “meets the eye”. In all cases, at the end of the day, it’s what you can prove not what you can feel. If you can develop proof for what you can feel, then great! If not, then all you do is conclude based on your evidence. If you are going to commit fraud, be prepared to cover even the smallest detail. As illustrated above, no one thought that the control replacement would be noticed, but it was!

 

Buyer Beware!

Recently, we were called to investigate damage to a residential air conditioning unit. The allegation was that the unit was destroyed by fire.  Upon examining the unit, no evidence of fire was found.  That is, there was no evidence that any wiring or controls were burned and the compressor and condenser were both undamaged (as far as fire was concerned). However, during the examination of the unit, the compressor was found to have blown a terminal and caused its destruction. Most HVAC technicians will recognize this scenario. The possibility of lightning causing the damage was also explored and eliminated because there was no lightning in the area at the time of the compressor failure.  Instead of replacing the compressor, the homeowner had the entire unit replaced with a unit of greater capacity.  In doing so, the homeowner assumed that the insurance company would pay for the new installation which amounted to more than $8000.00.  Without a covered loss, the insurance company denied the homeowner’s claim leaving the homeowner to  absorb the entire cost of the new installation.   The lesson to be learned here is that you do not want to commit to a major purchase unless you can handle the expenditure if your insurer denies your claim. In this case, the cost to replace the compressor and recharge the unit would have been in the neighborhood of $1200.00 to $1500.00, which is significant lower than the new unit.