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Residential and commercial HVAC advice, air conditioning preventive
maintenance, air conditioning repairs, and replacing air conditioning
systems.
HVAC Variable Speed Motors
Today's technology,
while being more expensive to purchase up front, can pay for itself
over time in energy savings by increasing efficiency. Variable speed
blower motors not only increase the efficiency but they also increase
your comfort. Conventional HVAC systems are designed to maintain
comfort based on a peak load of 95 degrees Fahrenheit out side
temperature with 75 degrees Fahrenheit and 50 percent relative humidity
inside. That means that even when the temperature outside is 80 degrees
Fahrenheit the system will still operate full blast as if it were 95
degrees Fahrenheit outside. Imagine you had a car that only did one
speed. Sure it would get you there but how efficient would it be? Both
Trane and Carrier HVAC systems have specifically designed systems with
variable speed blowers for greater efficiency and humidity removal.
Other manufacturers have followed their lead.
Variable speed motors (technically called ECM or
Electronically
Commutated Motor) along with two-stage compressors and multi-stage
furnaces offer better control and efficiency by helping your system run
at the speed it needs to run at to meet the current load demand.
Temperatures are even and the equipment cycles per hour are reduced. In
both the summer and winter the motor runs at a lower speed until the
demand increases and then it ramps up to meet that higher demand. It
only runs or consumes enough energy to meet the current demand. Other
benefits to having variable speed motors are:
- Soft-start capabilities
- Quieter operation (research indicates up to 50
percent less noise than conventional blowers).
- Better humidity control which adds increased
comfort in the summer
- On higher SEER condensing units, variable speed
motors are used for the condenser fan motor.
- When used in conjunction with multi-stage
furnaces AFUE ratings increase.
THE CARRIER INFINITY®80 GAS FURNACE
The Infinity™ 80 Variable-Speed, 4-way Multipoise Gas Furnaces offer
unmatched comfort with ComfortHeat ™ technology and IdealHumidity™ in
an 80% AFUE gas furnace. You get all the benefits of a ComfortHeat
technology furnace: reduced drafts, reduced sound levels, longer
cycles, less temperature swings between cycles, and less temperature
differences
between rooms. With the variable speed blower motor, homeowners can now
economically run constant fan to help eliminate temperature differences
throughout the house and to get better indoor air quality. This
IdealHumidity furnace also increases comfort in the summer by wringing
out extra humidity when needed. The Infinity 80 furnaces are approved
for use with natural or propane gas, and the 58CVX is also approved for
use in Low NOx Air Quality Management Districts.
TRANE XV95 VARIABLE-SPEED, TWO-STAGE FURNACE
* Variable-speed blower motor with Comfort-R™ operates at lower, more
efficient speeds than conventional blower motors. With Trane’s
exclusive Comfort-R™ feature, there is greater humidity control during
cooling. Allows
compatibility with higher SEER two-stage outdoor units.
* Adaptive silicon nitride hot surface igniter. Highly reliable
ignition system provides longer service life.
* Heavy steel insulated cabinet. Comes in easy-to-install sizes in
three industry standard widths; 40" tall. Insulated panels hold more
heat in the furnace, ensure greater durability and reduce operating
sound.
* Self-diagnostic controls. Complete diagnostics for easy servicing.
Also includes a system fault analysis for quick gas flow shutoff,
coupled
with automatic ignition retry after sensing a fault mode.
* Easy-access doors (upflow models only). Quarter-turn dual door
latches provide quick and easy access for servicing.
* Multi-port in-shot burners. Perfectly shape the flame cone for the
maximum heat possible while using less fuel. No service adjustment
necessary.
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We can assist you with IAQ, indoor air quality, air filtration,
filtration, design build, air conditioning service, second opinion,
chiller service, chilled water, chilled water piping, hydronic, make up
air, energy management systems, load calculation, heat pump, two stage,
variable speed, VFD, humidity control, HEPA
Affiliations with heating, ventilation and air conditioning equipment
suppliers includes: CaptiveAire, Inc. commercial kitchen
ventilation, Superior Products International II, Inc, (Supertherm, HPC,
HSC, Rust Grip, Omega Fire), Lennox, Carrier , Trane, Goodman,
Honeywell; and insulation manufacturers Certainteed, Johns Manville,
Owens Corning, Knauf
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A/C SERVICE
-Call Now
713-875-0872
COMMERCIAL
AND RESIDENTIAL - AIR CONDITIONING SERVICE
* Preventive Maintenance
* Seasonal Checkups, Filter Change
HVAC System - Component Replacement, Repair and Service
Air Conditioning Maintenance, Service, and Repairs
No
matter what name brand (York, Trane, Carrier, Rheem) of air
conditioning and/or heating unit you purchase some time or the other
you will need to have that air conditioning and heating equipment
checked for a problem and repaired. Even if you have regular air
conditioning maintenance done. While there are air conditioning and
heating manufacturers that engineer quality into their air conditioning
and heating equipment, that equipment is prone to breakdown simply
because it is a mechanical/electrical device and will need repair
sometime throughout its useful life. Most of the time diagnosing
problems is simple and other times it can be a complicated process
where the HVAC technician calls in another HVAC
technician or even an HVAC
manufacturer representative. Residential and commercial heating and
cooling is important and you want the best possible HVAC air
conditioning and heating service. It does not matter whether you have a
Carrier Air Conditioner, Trane Air Conditioning Units, or need air
conditioning or heat pump replacement, it is best to get a qualified
technician to look at your system before a decision is made to repair
or replace the air conditioner or heat pump systems.
Once
a diagnosis is made to your air conditioning and/or heating system, the
unit can be repaired, in most situations, with stock HVAC parts off the truck. Sometimes the HVAC part has to be ordered because it is a
specialty part that only the HVAC
manufacturer of your air conditioning and heating equipment can
provide. If the part can be picked up locally then you can expect to
pay for travel time to and from the HVAC parts dealer. It is
practically impossible to carry every single HVAC
part for every single HVAC breakdown
that occurs.
Finally, air conditioning and heating maintenance,
provided on a
regular schedule, can prevent many air conditioner or heater breakdowns
thereby preventing the need for you to call an air conditioning and
heating repair person for air conditioning and heating troubleshooting.
Air Conditioning and heater maintenance can save you lots of money in
the long run but even so, problems can still occur.
Common Air Conditioning Preventive Maintenance &
Repairs
Air Conditioning Refrigerant Charge
This is a very common air conditioning
problem. The air conditioning
unit will cool for a few hours and then it stops cooling all together.
The next day or several hours later the air conditioning is cooling
again but for only a few hours and then the air conditioning stops
again. The reason this is happening is because the air conditioning
unit is low on refrigerant (the air conditioning unit could freeze
because of a few other air conditioning problems but this is the most
common reason). Believe it or not the evaporator coils inside the AHU (Air Handling Unit) are freezing. You may
notice the air conditioning refrigerant lines on the condenser or at
the AHU
are frozen with ice build-up. The frost or ice builds up on the coils
and blocks air flow (low air flow and no cooling are a sign of a low
charge). A low air conditioning refrigerant charge will cause the
evaporator coil to operate at or below freezing. Since the coil
typically operates below the dew point, it draws condensation out of
the air. When the evaporator coil begins operating below freezing all
this condensation freezes to the evaporator coil and the unit stops
cooling.
Air Conditioning Refrigerant Myth
The myth that most people believe is that if you add
more
refrigerant to the air conditioning unit it will cool better. This is
only true if the evaporator coil is operating below freezing. The air
conditioning unit must have a balanced charge and usually only an HVAC
professional can charge your air conditioning unit properly. Another
misconception about refrigerant is that the air conditioning unit burns
it up and it must be replaced from time to time. This is not true. The
refrigerant loop is a closed system and barring any leaks the air
conditioning system should never need any refrigerant. Click here to see a simple representation of
the refrigeration cycle.
Air Conditioning Refrigerant Leaks
Refrigerant leaks should be repaired for the following
reasons:
- Many refrigerants have been deemed hazardous to the
atmosphere by the EPA and have either Ozone
Depleting Potential (O.D.P.) and/or Global Warming Potential (G.W.P.)
- Low refrigerant charges hurt the efficiency of the
air conditioning unit or heat pump.
- Low
refrigerant charges take away from the life of the air conditioning
compressor. The compressor is cooled from the return refrigerant vapor.
When there is a low charge there is fewer vapors to cool the compressor
therefore it runs hotter. Any air conditioning compressor (or electric
motor for that matter) which runs above the recommended temperature
range will have a shorter life span and cost more to operate.
- Typically
refrigerant oil leaks out of the air conditioning system at the leak
point. Eventually, the oil level in your air conditioning system will
drop below safe levels and the air conditioning compressor will sieze
up from lack of proper lubrication.
The Refrigeration Loop
is a closed system and refrigerant should never have to be added to the
air conditioning unit unless there is a leak. Most residential air
conditioning units use R-22 refrigerant. Prices of R-22 are rising
every year as we get closer to the date when refrigerant manufacturers
will no longer be able make R-22. Phase-out of R-22, an HCFC, begins in
2010 and expected to be complete by 2020. Make sure you ask what air
conditioning service company charges for R-22 when you are calling an
HVAC contractor. If your air conditioning unit needs more than two
pounds or charged more than once a year it is recommended you have a
refrigerant leak check done to your air conditioning system. You most
likely have a serious refrigerant leak and it needs to be repaired.
Leaking units do not operate efficiently, take their toll on the
environment, and can cause serious HVAC mechanical problems in the
future. A good HVAC
service tech will attempt to find the refrigerant leak within the
hour's air conditioning service you are paying for in addition to the
refrigerant charge. Finally, after the air conditioning unit has been
properly charged, the air conditioning unit should have a temperature
difference between the return and supply of 12° to 20°
Fahrenheit
(delta T). The range is generally an acceptable practice to determine
if your air conditioning system is operating efficiently. If you do not
have this range of temperature differential with your air conditioning
system then there are problems which need to be addressed whether it is
bad duct or a mechanical or electrical issue causing the problem the
air conditioning unit is simply not providing the cooling it needs to
provide to make you comfortable.
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