Carney Plumbing, Heating & Air Conditioning Blog

What Are Thermostatic Expansion Valves?

June 11th, 2012

The thermostatic expansion valve, sometimes known as a TEX, TEV or TXV, is a critical piece to influence the efficiency of your Blue Bell air conditioning and refrigeration units. A tiny sensor controlling the evaporating phase of process, the valve can have a big effect.

Cool air is manufactured by a re rapid movement of a refrigerant between liquid and gaseous states. Compound chemicals that are able to do this at a low temperature are compressed and expanded, absorbing and releasing heat at different points along the way. The TEV controls the flow of the refrigerant into the evaporator coils according to the temperatures of the various ingredients.

Cool Air 101

To condition air, the refrigerant, most often freon or another fast acting, low temp compound, evaporates into a gas that runs through a coil and absorbs heat. Passing through a compressor, the freon condenses under pressure back into a liquid again and releases the heat, becoming cool enough to chill a party.

Too much freon in the evaporator tube and the pressure is not low enough to expand to gas and absorb heat, working inefficiently for no gain. Too little freon and the conversion is also ineffective by not reaching the density needed to condense.

There are four types of valves with different benefits for different types of cooling environments. With its ability to adjust minutely to changing conditions, the thermal expansion valve creates the perfect mixture of pressure and freon for more complicated systems.

At the Starting Gate

An interactive device, the valve senses the evaporator pressure and temperature and adjusts the flow of the refrigerant so as to maintain a given “superheat”, the difference between the refrigerant vapor temperature and its saturation temperature. By controlling superheat, the TEV keeps nearly the entire evaporator surface active while not permitting liquid refrigerant to return to the compressor.

Some valves operate on an electrical impulse from sensors that can measure the temperatures. Others are open all the time. The thermostatic expansion valve actually utilizes the pressure between the two sections to open or close itself, regulating flow based on the very same pressure it is designed to moderate.

Like the buildings they comfort, Blue Bell central air conditioning systems are varied and diverse. There are nearly as many thermostatic expansion valves as there are units to receive them. Call Carney Plumbing, Heating & Cooling today if you need any air conditioning service in the Blue Bell area!

Air Conditioning Q/A: Why Is My Air Conditioner Not Cooling?

June 4th, 2012

Your Lansdale air conditioner can run virtually trouble free with just a little maintenance annually. If these little things like changing the air filter and cleaning the drain are not done regularly, the neglected units can really lose their cool.

The Basic Course

Through a process which involves the rapid evaporation and condensation of chemicals called refrigerants, air conditioners use compounds that have properties that allow them to change rapidly from gas to liquid and back again at low temperatures.

Heat is absorbed when the liquid evaporates and transforms into gas, making the space around it cooler. Compressing it tightly together again, the heated gas condenses back into liquid with a residue of unwanted moisture that must be released and is vented usually to the outdoors.

The newly cooled air is distributed through the house by means of ductwork, pushed by fans driven by electric motors. As the air moves along, it passes through a filter and can be further de-humidified.

Problems in the System

If the filter is clogged, movement of the cooled air is slowed to the point we might think the unit is broken. If the condensate drain is plugged, the motor can get damaged and stop producing. Regular maintenance performed by the home owner or as a service of Carney Plumbing, Heating & Cooling can avoid or eliminate these simple aggravations.

When the heat builds, however, and cool relief seems nowhere near the air ducts, it may be time to call a professional to dig deeper to find the reason and suggest solutions.

Back to Cool

If not serviced regularly, the amount of refrigerant in the coils may decrease over time or the coils themselves could get clogged and impede the evaporation/condensation process. A leak in the coils could drain the system, rendering the unit useless and wholly unproductive.

There are belts on each of the two separate fan motors which may be worn or loose, causing the fans to blow less efficiently. The motor may need to be oiled or have a broken part that doesn’t allow it to push the air at all.

Most of the time, these fixes are relatively minor and do not threaten the life of the air conditioning unit. Schedule an annual inspection and service from a certified Lansdale HVAC company like Carney Plumbing, Heating & Cooling today!

What Professional AC Maintenance Includes

May 29th, 2012

Besides the cool air, what we like most about having air conditioning in Abington is that we don’t have to do anything to still live in a cool climate when it’s boiling outside. With programmed thermostats adjusting the temperatures automatically, we don’t even have to turn it on.

Therefore, it is very inconvenient (not to mention uncomfortable) when our unit misbehaves and forces us to pay attention. Our first inclination, suddenly over-heated, may be to call for help, but often the expensive repair can be accomplished easily or avoided completely by checking the drain line that may be clogged. That said, if your system is consistently acting up, it may be time to call for maintenance if your AC is having problems, especially before small issues become costly breakdowns.

When it gets more complicated, it is important to consult an Abington air conditioning professional.

Air Conditioning 101

Air conditioning is a process which involves the rapid evaporation and condensation of chemicals called refrigerants, compounds that have properties allowing them to change from liquid to gas and back again at low temperatures.

Simply stated: when the liquid evaporates and transforms into gas it absorbs heat. Compressed tightly together again, the matter condenses back into liquid with a residue of unwanted moist heat that must be released to the outdoors. Over the course of handling the air to cool it, air conditioners are able to filter dust and dehumidify the air as well.

Annual Service

Air conditioning units are designed to last for a decade or two of virtually trouble-free comfort, so long as they are maintained regularly. A service contract with a reputable company ensures reliable maintenance and establishes a relationship so that if anything should go wrong, your call for help will be at the top of the list with a mechanic who likely knows the details of your particular unit. Consistent care also helps reduce stress and wear on your AC, keeping your cooling system performing reliably through the hottest days.

You annual maintenance visit will include all of the following minimal tasks:

a check for the correct amount of refrigerant in the system;
a pressurized system test for any leaks using an actual leak detector tool;
a controlled evacuation and disposal of any excess refrigerant instead of an illegal toss in the dumpster;
a check for and seal of any duct leakage within the in central systems;
a measure of air flow through the evaporator coil;
a verification of the correct electric control sequence, making sure the heating and cooling systems cannot operate simultaneously;
an inspection, cleaning and maintenance of the electric terminals and applying a non-conductive coating if necessary;
a check of all belts for tightness and wear;
a check for oil in the motors;
a check for the accuracy of the thermostat.

These detailed checks are part of what makes professional AC maintenance in Abington so valuable for ensuring comfort, efficiency, and longevity.

To schedule your appointment today, give Carney Plumbing, Heating & Cooling a call!

Plumbing Tip: What is a Faucet Aerator?

May 21st, 2012

A tap aerator or faucet aerator is located on the tip of water faucets which are used indoors such as kitchen and bathroom sink faucets. Their purpose is to spread the water stream into a number of smaller streams, in essence adding air to the water stream. This saves the amount of water which comes out of the tap at one time while also reducing the amount of backsplash which occurs when the faucet is turned on.

Utilizing faucet aerators in your Doylestown plumbing can be one of the most inexpensive ways to save money on water consumption and save energy.

There are two main types of faucet aerators, some which use metal or plastic screens to separate the water, and some which do not use screens. One advantage to those without screens is that they eliminate problematic clogging which occurs on screen aerators due to sediment buildup. There are also aerators with off-valves and swivel aerators which allow users to direct flow to wherever the water spray is needed.

There are three main flow-types seen today. The needle method creates a circular pattern of small, single streams of water with no water-flow in the very center. The aerated method created a tubular flow with air mixed into the water, creating a single stream of bubbly water. The laminar method has no air mixed in which makes for a single stream of water with no bubbles.

Many aerators are designed as more economical low-flow aerators which optimize the water flow while still providing optimal water-flow performance. In kitchens these low-flow options decrease flow from 2.2 gallons per minute to 1.5 gpm or 1.0 gpm, saving anywhere from 32% to 54% of water-usage. On bathroom faucets the water-flow is decreased from 2.2 gpm to 1.0 gpm or even 0.5 gpm saving from 77% to 84% of water usage. When engineered properly, low-flow or economic aerators can provide increased perceived water pressure while in actuality helping to save water.

When purchasing new faucet aerators, ensure that you find the proper type (male or female) and the proper size (regular or small). There are dual-thread options for those who do not know whether a male or female aerator is necessary. Also, look at the tap aerator’s price in conjunction with how much savings it can provide in water usage annually and see how little must be spent on each faucet in order to save hundreds of dollars.

For any help upgrading your Doylestown home’s plumbing, give Carney Plumbing Heating & Cooling a call!

Schedule Your Spring AC Maintenance

May 18th, 2012

Be sure to schedule your spring AC Tune Up to have an expert check for damage, corrosion, or a family of mice! All of which will result in reduced efficiency. Contact Carney Plumbing, Heating, and Air Conditioning today to schedule a tune up for your AC system.

What Causes Low Water Pressure?

May 14th, 2012

Low water pressure in your home can make just about everything from showering to cleaning more difficult. It is frustrating, but it often seems like there is very little you can do about it. In fact, you may be able to improve your Doylestown home’s water pressure in a variety of ways, but the appropriate technique will depend on the root cause of your problem.

There are several different possible causes for low water pressure. If the problem is limited to certain areas or fixtures in the house, it may very well be because the pipes feeding that area or fixture are too small. Smaller pipes will only allow a smaller amount of water to pass through at once, making it impossible for you to get the force you are after.

Fixing this, of course, means putting in larger pipes, and that may be easier said than done. However, if the problem is on a small scale, you should not have too much trouble or need to pay too much to have a professional Doylestown plumber complete the job. A problem in a particular fixture can also result from small clogs or backups in the fixture itself, and this is a relatively easy situation to remedy as well.

A low water pressure problem that affects your whole house can result if the main pipes feeding into your house are too small. This could be the case if your house has been added onto since it was built or if you have more people living there now and using more water.

Replacing those incoming pipes is a big job, but it is often the only way to increase your water pressure and make it possible for the system to satisfy the water needs of the house. This is definitely something you will want to have a professional work on, and while it can be costly, it will be well worth it in the end.

Another possible reason that you might have low house-wide water pressure is that you live at the end of the area water system or that you use an improperly located well. If your well is downhill from your home, for instance, you should consider installing a booster pump that can help move the water into your house more efficiently. The same remedy can work if you live on the outskirts of town and at the limit of your town’s water system.

For more information about ways you can improve your Doylestown home’s plumbing, give Carney Plumbing Heating & Cooling a call!

Call Carney for all of your bathroom remodel needs!

May 11th, 2012

Here at Carney Plumbing, Heating, and Air Conditioning we are experts when it comes to remodeling or adding a new bathroom. We remodeled the existing bathroom below for a customer, check out the before and after pictures!

Before #1

After #1

Before #2

After #2

Before #3

After #3

Plumbing Basics: Learning the Parts of a Toilet

May 7th, 2012

The majority of homeowners are not aware that they can repair most minor toilet problems on their own. Whether it’s overflowing or running more than it should, toilets can be repaired often without calling a Willow Grove plumber; however, it is important to know the basic parts of a toilet before trying to troubleshoot toilet issues.

Here’s a guide to learning the parts of a toilet:

Tank: Pictured above (inspectapedia.com) is the tank on the back of the toilet, which holds the water supply for the bowl and the components that you need to know to fix most problems.

Bowl: Holds wastewater and uses the water from the tank to flush the waste.

Flush Handle: The flush handle is the part that everyone knows, but it’s important to know what happens when you flush: the flush handle is connected to the trip lever, which lifts the flapper and allows the water for the tank to enter the bowl.

Trip Lever: The trip lever is the part that you need to know for a running toilet. It attaches the flush handle to the flapper, and when you flush the toilet, this lever lifts the flapper (sometimes called a flapper valve) and releases the water from the tank into the bowl to force the wastewater in the bowl down the sewer drain. When a toilet is running, you can simply lift the trip lever to lower the water level in the tank.

Float Ball: The float ball basically measures the water in the tank. After you flush, the ball will fall as the water level lowers, and the ball will rise again as the tank fills from the toilet main water supply. When the tank has enough water, the toilet will stop running.

Overflow Tube: This is the tube that will stop the tank from overflowing if the toilet is running. It leads into the drain and pushes out all the excess water. Sometimes you can remove the rubber water supply tube from the overflow tube to keep a toilet from overflowing if you are not able to shut off the main water valve behind the toilet.

Flapper Valve: This is the part to know whenever you have an overflowing toilet or a backup. The flapper is attached to the flush handle by a chain and the trip lever. Whenever the flapper is pushed down, the water cannot leave the tank, so when you flush, it creates a suction to pressurize the water entering the bowl so that it has enough force to flush the waste. If your toilet is overflowing, push the flapper down with your hand so that it stops the water from entering the bowl. Most people are afraid to put their hands in the tank because they associate the tank water with the water in the bowl. The water in the toilet tank is clean because it comes from the main water supply line, which is attached to the stop valve.

Stop Valve: This is also called the toilet supply valve because it controls the fresh water supply going into the tank. It is usually located behind the toilet near the floor, and turning it off is another way to stop an overflowing toilet because the tank cannot fill once it is turned off. It is attached to the supply tube, which attaches to the refill tube.

Supply Tube: Although the supply tube and refill tube are connected, they are two different parts. People often use their names interchangeable, but what’s most important to know is that the supply tube supplies the water from the main line and into the refill tube, which refills the bowl.

Refill Tube: When the float ball is down, the refill tube fills the bowl with the water from the supply tube. After a flush, the ball rises, and when it reaches a certain level, the refill tube stops the flow of water into the bowl.

Trap: The trap is a seal that prevents backflow and strong odors from the main sewage line. If you smell sewage in your bathroom, particularly near the toilet, you could have a bad seal or faulty trap. Troubleshooting a trap usually requires a plumber, unless you are familiar with toilet installation.

Wax Ring: Another cause for bad odors is the wax ring, which is a seal between the toilet and the sewage line. A faulty wax ring could also cause leaking at the bottom of the toilet. Call a plumber whenever you aren’t sure about leaking toilets or strong sewer odors; there could be a problem in the main sewer line.

Call Carney Plumbing Heating & Cooling if you have any questions about these components, or if you want to trouble shoot with one of our Willow Grove plumbers.

Save $200 off any Energy Star Rated AC System!

May 4th, 2012

Get $200 off any Energy Star rated heating and air conditioning system!

See what our customers say!

“We purchased a Trane from Carney’s also, had it for 6 years now, not only did we get a great system but the service was excellent. The installation was a neat clean finish and they explained everything they were doing. I highly recommend the system and Carney’s Plumbing and Heating!”

Fix Water Leaks Before They Cause Major Damage

April 30th, 2012

Water leaks are one of the most destructive and frustrating problems in many Lansdale homes. Undetected water leaks can rot wood, destroy drywall, and cause mold to grow in unseen spaces of your home. Spending the time and money to find and fix water leaks before they cause significant damage is one of the most cost-effective actions a homeowner can take.

Sinks

Cabinets beneath kitchen and bathroom sinks are a good place to start. Look for signs of water damage or build up. Mold and mildew are telltale signs of water leaks. Touch the pipes, particularly the areas where they enter the faucet. Run the hot and cold water faucets for a few minutes and repeat the inspection. Finally, fill the sink with water, let it stand a few minutes and open the drain. Now check the drain pipe and the joints that connect it to the sink for leaks.

Dishwashers

Dishwashers can’t easily be checked for leaks without pulling them out from beneath the counter. But you can inspect the water lines that connect the dishwasher to the kitchen sink. For some units, you may be able to shine a flashlight beneath the dishwasher to look for puddles.

Toilets

Toilets can leak from the water supply pipes filling the tank and from the seal between the toilet and the waste pipe in the floor. Flush the toilet several times and carefully look for any signs of leaks in the joints of the water supply pipe and the floor around the base of the toilet. Lift the lid off the tank and flush the toilet. When the tank refills, the water should completely shut off. If the flush valve or water control unit is old, corroded, or loose, the water will continue to run. Running water cools the water delivery pipe to the toilet and the tank, which will cause them to collect condensation in humid weather. The condensation will drip and eventually cause water damage to the floor behind the toilet. Bottom line – don’t ignore a running toilet. Have the water control and flush valve fixed or replaced.

Tubs and Showers

Inspect the caulking around the tub or shower. Old, cracked, or missing caulking can allow water to leak into the wall. Water dripping from a leaky faucet or shower head will go down the drain and not cause any damage, but the faucet may also be leaking water behind the tub or shower.

Hot Water Heaters

Finally, inspect the hot water heater for leaks, and the boiler if the house has hot water heating. The first place to look is the floor around the appliance, but also look at the joints where the water pipes connect.

If you need any help with leak detection or any other problems with your Lansdale plumbing, give Carney Plumbing Heating & Cooling a call!