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Commercial Cooling System Service and Repair

Commercial Cooling System Service and Repair

cooling services in MissouriAmerican Services heating and cooling repair in St. Louis knows that today’s generation of commercial cooling systems are designed primarily to be energy efficient, but also are built so that maintenance and repairs are minimal due to new technology.

Modern cooling systems are expected to meet certain specifications in order to be installed in commercial buildings, some of the requirements are listed below:

  • Appearance-the way a cooling system looks matters a lot, much of the ductwork is exposed so a clean and orderly appearance is desired.
  • Noise-a clean and quiet functioning cooling system should ventilate the air; eliminate dust and potential allergens without a high noise level.
  • Adaptability-commercial cooling system should have a flexible ability to adapt to energy efficient sources.  More and more facilities management are interested in installing commercial cooling systems which can be adapted to efficient sources such as a solar source.
  • Energy efficiency-without a doubt the most significant aspect in the commercial cooling system is energy efficiency. This is the number one reason manufacturers are beginning to use water for the making of such systems. New technology is showing manufactures that basing their selection on the high capacity of water to transport energy will be superior compared to air.

Before actually purchasing one of the commercial cooling systems on the market today, be prepared to hire the best team for the actual installation, such as American Services, because commercial cooling systems are very complex.  These systems can be purchased as singular or modular units, roof or ground mounted. (At this point an upgraded HVAC system should be considered) which will support your new cooling system efficiently. This will also provide a proper working environment without consuming too much energy or requiring high maintenance costs.

Many commercial buildings today have learned the advantage of retrofitting energy efficient HVAC systems. These systems efficiently deliver heat and cool air wherever needed, and provide a substantial energy savings in the process.

Refrigeration Applications Can Offer Energy Savings

Refrigeration Applications Can Offer Energy Savings

refrigeration installation in MORefrigeration applications in the commercial sector involve a wide range of technologies, from standalone residential type refrigerator, to large central supermarket refrigeration systems. The most common refrigeration applications include the following;

– Grocery store refrigeration systems- Grocery store systems have 2 separate and distinct components including the display cases, and the central refrigeration system which includes the mechanical equipment and control section. Grocery stores account for about one third of refrigeration energy use.
– Beverage merchandisers- beverage merchandisers consume about 5 percent of overall refrigeration energy use.
– Reach-in refrigerators-reach-in refrigerators account for about 12 percent of refrigeration energy use overall.
– Refrigerated vending machines-these machines consume about 13 percent of commercial sector refrigeration energy use.
– Walk-in cooler and freezers- account for about 18 percent of refrigeration energy use.
– Ice machines- ice making accounts for about 10 percent of refrigeration energy use
and there are other applications as well.  Commercial refrigeration also includes a wide range of other miscellaneous applications to include water coolers, on- beverage merchandisers, and residential grade refrigerator/ freezer combinations. These miscellaneous applications account for about 8 percent of refrigeration energy use for the average restaurant establishment.

This is a basic breakdown of general energy use in the commercial restaurant sector for refrigeration applications. There are many opportunities that exist for energy efficiency improvements in the commercial refrigeration industry.

One of the considerations for energy cost savings would be to hire a professional such as American Services refrigeration services in Missouri,  to evaluate your equipment’s efficiency.  The older your equipment is, the less your efficiency ratings are.

Today there is new technology which includes energy efficient reaches in refrigerators utilizing 30 percent less energy than older models. Replacing your old equipment with the new, updated technology will produce instant and significant energy savings.

HVAC Retrofits

HVAC Retrofits

HVAC Services in Saint LouisRegardless of how well your HVAC system is maintained, age and building expansion will eventually cause you to replace it. This critical decision needs consultation from professionals such as American Services HVAC repair in St. Charles, and a well thought out plan.

HVAC system replacements are a costly process that can disrupt building operations over an extended period of time. A well thought out plan including consultation with a certified HVAC designer helps ensure that the retrofit produces maximum benefit. This will enhance operations of the facility, and immediately generate energy cost savings. A good plan will also make sure that the retrofit process will not have to be repeated in the future secondary to poor planning and impulsive decision making.

8 steps to keep in mind for an  HVAC retrofit:

  1. The quickest and easiest way to replace older HVAC systems is to put in a new system that matches the old one. Match components by type, compatibility, voltage/amp output, and then replace with new components of exactly the same profile. This process will work if there are no changes in your building.
    2. New technologies result in tremendous progress in the last 15 years as far as HVAC technology. New DDC control systems provide a better climate while reducing energy costs. High efficiency chillers can reduce the cost of air conditioning. Variable frequency drives improve operating efficiency. These are all proven new technologies and are used widely today in modern installations.
    3. Modern buildings today are under a constant state of change. Interiors are upgraded; tenants are moving in and out, infrastructure changes increase. The one thing that doesn’t change is your HVAC system trying to support all these changes. This is why flexibility must be built into your HVAC system retrofit.
    4. Part-load performance-chillers are the single largest users of electricity improving the efficiency of chillers is what chiller manufactures strive to do. When selecting replacement chillers, pay attention to full load efficiency ratings
    5. Maintain records of maintenance performed on your building, maintenance costs, increasing maintenance requirements.  Implement a preventative maintenance checks and services checklist for your building’s maintenance staff.
    6. Seeing the big picture- most generally tunnel vision develops when planning for HVAC retrofits focusing on only specific components or portions of the entire HVAC system. Experience shows, before making retrofit decisions facility executives should step back and determine if other projects planned for the building will affect the HVAC system operation.
    7. The major goal of any HVAC retrofit program is to improve the level of service.  Facility executives should consult the occupants and be willing to receive input. Facility executives can then develop a clear understanding of what the HVAC system will be expected to do.
    8. Program approval-HVAC retrofits are costly programs.  More often than not facility executives simply submit funding requests with little or no supporting information, the outcome, “Funds Denied”. Put a band aid on components and just patch systems together, to keep things going. An HVAC retrofit is a major undertaking for the Facilities Department, the occupants, and organizations management. A certified HVAC systems designer, HVAC component manufacturer should all be brought in during the planning phase.

 


Troubleshooting Commercial Refrigeration Systems

Troubleshooting Commercial Refrigeration Systems

refrigeration installation in MOAmerican Services, commercial refrigeration maintenance service in University City knows that maintaining and repairing the refrigeration units in your restaurant can be expensive.

Being aware of troubling signs and symptoms of common problems that you can fix will save you major repair costs down the road.

A list of common commercial refrigeration issues and how to address them;

1. My refrigeration doors won’t close and frost builds up on the shelves. Most generally a rubber door gasket is the cause. Replacing the gasket is easy enough, measure the old gasket, measure from outside corner to outside corner. Record manufactures name and model   and serial number, these gaskets can normally be found online.
2. Refrigeration unit will not run at all. Check to see if unit is plugged in, if so and the unit is not running chances are the thermostat has failed in the open position. A quick check entails
pulling the housing down connect the thermostat wires together, turn on breaker and plug the unit back in, if the unit begins to run replace the thermostat.
If you experience the opposite (unit running all the time) your evaporator apparatus normally freezes up, restricting air flow, and temperatures rise. Conduct the same procedure as above, to test the unit and replace the thermostat if necessary. If the evaporator continues to freeze up call a service technician.
3. How do I find out the type of thermostat my refrigeration unit has? There are 2 types of thermostats: And air sensing thermostat which does just that senses temperature through the air. It’s most generally located inside the unit near the top.
Evaporator sensing thermostats have a coiled capillary tube attached to it; it appears as a tight spiral. It senses the temperature of the evaporator rather than the air. Caution these 2 controls are not interchangeable.
4. How do I replace a condenser or evaporator fan blades? There are 2 types of motors for refrigeration, condenser and evaporator.
Motors vary in size, voltage and rotation all of this information is found on the motor. Having this information on hand when ordering is critical, motors and fan blades must match up (clockwise or counterclockwise).
5. How do I replace refrigeration door latches and hinges?
Walk-in cooler or freezer hinges are either flush or offset. When removing them they will have a number on the back, this number is important when ordering your replacements. These latches and hinges do not interchange.
6. I want to buy a new reach in refrigerator. Commercial reach-in refrigerators, available through eTundra.com, are built for heavy duty use and have a more powerful compressor than residential refrigerators.

 

Commercial HVAC System Troubleshooting

Commercial HVAC System Troubleshooting

new HVAC Installation in MOAmerican Services HVAC maintenance service in Clayton knows that when it comes to commercial heating and cooling systems, a major mechanical unit breakdown can really take the complacency out of maintenance professionals.  Your HVAC system requires regular upkeep, just as your car needs a regular tune-up, so must your HVAC system.

Some common and reoccurring issues and symptoms include:

-Rooms that are too hot or cold
-Poor duct design and sealing are often the cause here. Inspect your
ductwork regularly seal any leaks on a semi-annual basis. Add insulation to improve comfort for more predictable room to room temperature variations.
– Excessive dust and humidity, HVAC systems that are a mismatch in size or operating on its last legs can cause a pretty undesirable environmental hazard. Change filters regularly, and insure ducts are sealed.
– Your cooling system regularly emits noise, once again your duct system could be improperly sized, or an issue with the indoor coil of your cooling equipment. A certified HVAC contractor at American Services should be consulted for this maintenance operation.
– Excessive maintenance repair bills, and monthly energy cost increases: Most generally the age and condition of your HVAC System is usually related to the efficiency of its output. So if Energy costs are rising and HVAC system efficiency is dropping, it’s time to start shopping for a new system. These are all signs and indications of problems you should observe for;
1. Thermostat settings checked.
2. All electrical connections tightened and motor voltage and current calibrated.
3. Lubrication all moving metal parts.
4. Inspection of condensate drain and central air conditioner, remove any clogs.
5. Controls checked for proper and safe operation

Cooling specific maintenance
1. Cleaning of evaporator and condenser air coils
2. Monitor and adjust air conditioner refrigerant levels
3. Clean and adjust blower components

Heat specific maintenance
Check of all gas connections, gas pressure, burner combustion, and heat exchanger to prevent fire hazards, and health problems related to air quality.

Be sure to schedule an annual pre-season checkup from a certified HVAC contractor from American Services HVAC repair.

Commercial Cooling Solutions for Work Spaces

Commercial Cooling Solutions for Work Spaces

cooling service in MOAmerican Services Commercial Cooling Installation in Overland knows that if your work space is full of heat generating electrical components and electronic devices, then you will need some heat removal systems. The comfort and wellbeing of your employees and safe operation of your equipment will depend on this. Conditioned air and proper ventilation are essential steps in creating a safe air conditioned environment that removes heat and circulates fresh air.

Some examples of these commercial buildings might be Schools, IT firms or manufacturing plants.

There are two types of commercial and industrial air conditioning. Modern cooling system technology uses ductless or split air conditioning. This allows the cooling unit and condenser to be located in a different location most generally on the rooftop. The cooling is thermostat controlled. Ducted cooling systems are inefficient and no longer installed in commercial applications.

Air cooling, water cooling, glycol cooling, and chilled water cooling are just a few of the cooling technologies still available today
Air cooled systems: widely used for its convenient ductless setup. The condensing unit is usually located outside, this helps with the exchange of the fresh air and removing of hot air. Because the cooling pipes are limited in length consideration must be made between workspace and the roof.
Glycol Cooling systems: though a very sophisticated cooling system
which produces temperatures below 50 degrees Fahrenheit. The coolant used in this system is Glycol it can be implemented over long distances and provide cooling to many workspaces with one condenser. This system requires more maintenance and constant monitoring of quality and quantity of the coolant Glycol.

Water cool systems: a cooling tower is used cool water which gets pushed back to the heat exchanger in the work environment. Benefits are multiple workstations can be cooled with just one single cooling tower. The cost of maintenance of cooling tower and quality of water may not be the best economic fit for your building.

Chilled water systems have a greater heat removing capacity. Cools larger areas with a greater efficiency and it only requires one
chiller plant. Possible setbacks can be installation charges; these are “extremely expensive” systems. Another concern should be the removal of most the moisture in the air (employee health problems). Careful consideration of your current building and its infrastructure a combination of one or more of these systems can be used to provide your air conditioning cooling systems.

 

Commercial Radiant Heating

Commercial Radiant Heating

American Services heating installation in Missouri knows that radiant heating systems basically involve supplying heat directly to the floors or to panels in the wall or the ceiling of your commercial building. These systems largely depend on radiant heat transfer, the delivery or transfer of heat directly from a hot surface to the people and objects in the room this is called “infrared radiation”

There are a number of advantages associated with radiant heating. Far more efficient than baseboard heating, and generally considered more efficient than forced air heating, radiant heating has no energy lost through the ducting system. This lack of moving air can also be advantageous to people with allergies. Hydronic or liquid based systems use little energy. Ideal for those homes off the power grid or high energy rate locations.
These systems can be heated with the wide variety of energy sources including standard gas and oil, wood fired boilers, solar water heaters, or a combination of all or some of these.
There are three types of radiant floor heat:
1. Radiant air floors
2. Electric radiant floors
3. Hot water radiant floors
these three radiant heat processes can be broken down further into type of installation.
1. Wet installations
2. Sandwich installations
3. Dry installations

Air heated radiant floors;
because air is incapable of containing large amounts of heat
Radiant air floors are not cost effective in residential applications. Solar heating systems can be used to offset these inefficient methods.

Electric radiant floors;
Electric radiant floors consist of electric cables built into the floor itself. Systems that feature mats of electrically conductive plastic are also available on the market and are mounted onto the subfloor below a floor covering such as linoleum or tile.
Because electricity is involved the relatively high cost of energy should be considered before selecting this floor heating design.

Hydronic systems are by far the most popular cost effective radiant heating systems. Radiant floor systems pump heated water from a boiler thru tubing laid in a pattern underneath the floor. In some of these systems the temperature in each room is controlled by regulating the flow of hot water through each loop. This is accomplished by a network of zoning valves or pumps and thermostats.

Commercial Heating Efficiency Options

Commercial Heating Efficiency Options

heating service in MissouriIn order to maintain a comfortable climate, most commercial buildings must pay out a significant amount in energy expenses each year. Reducing those expenses can be challenging for most commercial businesses, although the use of solar heating systems can offset some of this energy expense. There are some methods available for “reducing” the energy used by this system, helping recovery of some energy costs.

Air Filters Need Regular changing
the number one way to keep heating and air systems operating at peak.  A monthly changing of the air filters is recommended particularly during winter and summer months. These filters effectively prevent dust and other materials from building up throughout the duct system.

Give your commercial heating system a tune up annually. Professionals recommend that both commercial and residential structures have a certified HVAC technician such as American Services HVAC maintenance in Florissant give your heating system a complete physical tune up. This should include ductwork. These annual physical checkups by professional HVAC technicians will insure that commercial systems run smoothly and efficiently. These complete heating system evaluations will also help identify any potential hazards, or mechanical breakdowns, resulting in prevention of major repair costs down road.
Seal Ducting-Seal the furnace and cooling ducts in your building, this will prevent the treated air from escaping. Ducts move the warm air throughout your building; if cracks, holes, or deterioration are present warm air will escape leaving cold spots throughout your building. Sealing and insulating your ductwork can save as much as 20 percent of your monthly energy costs.
Install a programmable thermostat-controlling the temperature in your building on a consistent basis, even when no one is present is accomplished by the use of a programmable thermostat. In commercial settings keep the building cooler at night and warmer during the day.

In summary; your commercial heating and air systems need a regularly planned maintenance plan. Systems over 10 years of age should be evaluated for upgrades or installation of newer models. Your American Services technician can provide information and guidance in these maintenance matters. Remember newer models or system upgrades operate much more efficiently than systems built 10 years ago.

How to Purchase Quality Restaurant Equipment at Auction

How to Purchase Quality Restaurant Equipment at Auction

new restaurant equipment in MOAmerican Services restaurant equipment repair in Jefferson County knows that there are 3primary reasons restaurant equipment shows up at an auction.

1.A restaurant fails: when a restaurant closes its doors the equipment has to go somewhere,   many of these failed restaurants sell their equipment to an auction house.
2. Equipment upgrades: replacing outdated models, obsolete equipment usually finds its way to the auction houses.
3. Dead inventory: restaurant equipment dealers try to unload equipment that is not selling well for whatever reason.

Everything that you might need for starting a restaurant business can be found at it these auctions.

Used equipment dealers and individual restaurant owners (or soon to be owners) frequent these auctions on a fairly consistent basis. If this is your first auction it can be advantageous to talk to or observe what the used equipment dealers and restaurant owner looks for in used kitchen equipment and what they bid on.

Restaurant equipment auctions can be held on site of the establishment that has gone out of business. Also at a certified licensed auction facility ( check local directories). Used restaurant equipment auctions are also being listed on the internet, on web sites such as eBay.

Another excellent way to find auditions in your area is to check with the classified ads of your local newspaper. Once you get to an auction there are mailing lists you can sign up for that will notify you when other auctions are occurring in your local geographic area.

Useful tips to successful restaurant equipment purchasing include;

1. Look for auctions with equipment from restaurants that were in business for a very short time; these pieces of equipment will have less time on them and fewer problems will occur right off the bat.

2. Remember there is NO WARRANTY, if you have doubts about any equipment don’t bid on it. Once you win the bid you have to pay regardless of the condition.

3. This equipment is sold as is. That means you buy it you take it away. The auctioneer will not deliver it or take responsibility for it once it’s been sold.

4. You must be aware of the safety/sanitary codes. In other words some of this older  equipment may not be up to current standards. U L and NSF labels must be visually present.

5. Check voltage requirements on the piece of restaurant equipment that you’re interested in. Most restaurants are outfitted to accept 220 /230/240 volts. Sometimes these auction houses will sell equipment that requires 440 volts, which cannot be used in most restaurant settings.

6. Beware, there are some auction houses out there that have a “not our responsibility attitude” these to be avoided. Generally speaking the longer an auction house has been operating , the more likely you will be able to obtain good used restaurant equipment from that particular auction.

 

Commercial Refrigeration Comprehensive Maintenance Part II

Commercial Refrigeration Comprehensive Maintenance Part II

commercial refrigeration installation in MOAmerican Services refrigeration  installation in Sunset Hills knows that performing preventative maintenance on your commercial refrigeration system is the best tool you have to prevent major breakdown or costly maintenance repairs. More often than not when things are going well with your refrigeration system, preventative maintenance is the last thing on anyone’s mind. Developing a daily, weekly and monthly preventative maintenance checklist that should include the task, the equipment, who performed the task, and date completed. Below is a list of items you should check on a regular basis:

– Pressure clean and degrease condenser coils
– Clear condensate drain lines
– Check condition of door gaskets for wear and tear or deterioration
– Monitor thermostat settings a couple of times daily
– Monitor temperature and cycling periodically
– Check compressor operation and control wiring
– Check refrigerant level
– Lubricate motors if oil ports are
present
– Check your refrigeration unit’s. thermometer
– Sure insulation condition on suction line
– Check door hinges and door closures for serviceability
-Check and calibrate defrost timers
This is just a sample refrigeration maintenance checklist ,determine which component requires daily weekly or monthly preventative maintenance checks and services that will best serve and lengthen your commercial refrigeration unit’s operational life span.

Your comprehensive maintenance checklist should also include: preventative maintenance checks an services
(PMCS) For your ice machine
– All removable parts should be taken out and cleaned
– Drain should be pressure cleaned
– An acid wash should be done on the river
– Clean ice level sense probe
Caution : It can be dangerous to have a dirty ice machines.

Comprehensive maintenance checklist for A/C machinery
– Pressure clean condenser coil
– Replace air filters and blower belt
– Check thermostat operation and settings.
Benefits of regular preventative maintenance are:
1. Reduced power consumption.  It easy to be green with a little preventative care.
2. Extended life of your equipment especially critical components like the compressor, and the condenser fan motor.
3. Avoid mold growth and contaminated spotted ice.
4. Properly maintain line coolers won’t cause system oil and capillary tube breakdown.
5. Proper door seal reduces energy consumption and extends life of equipment.

Commercial refrigeration comprehensive maintenance checklist

Performing preventative maintenance on your commercial refrigeration system is the best tool you have to prevent major breakdown or costly maintenance repairs. More often than not when things are going well with your refrigeration system, preventative maintenance is the last thing on anyone’s mind. Developing a daily, weekly and monthly preventative maintenance checklist that should include the task, the equipment, who performed the task, and date completed. Below is a list of items you should check on a regular basis:

– Pressure clean and degrease condenser coils
– Clear condensate drain lines
– Check condition of door gaskets for wear and tear or deterioration
– Monitor thermostat settings a couple of times daily
– Monitor temperature and cycling periodically
– Check compressor operation and control wiring
– Check refrigerant level
– Lubricate motors if oil ports are
present
– Check your refrigeration unit’s. thermometer
– Sure insulation condition on suction line
– Check door hinges and door closures for serviceability
-Check and calibrate defrost timers
This is just a sample refrigeration maintenance checklist ,determine which component requires daily weekly or monthly preventative maintenance checks and services that will best serve and lengthen your commercial refrigeration unit’s operational life span.

Your comprehensive maintenance checklist should also include: preventative maintenance checks an services
(PMCS) For your ice machine
– All removable parts should be taken out and cleaned
– Drain should be pressure cleaned
– An acid wash should be done on the river
– Clean ice level sense probe
Caution : It can be dangerous to have a dirty ice machines.

Comprehensive maintenance checklist for A/C machinery
– Pressure clean condenser coil
– Replace air filters a blower belt
– Check thermostat operation and settings.
Benefits of regular preventative maintenance are:
1. Reduced power consumption.  It easy to be green with a little preventative care.
2. Extended life of your equipment especially critical components like the compressor, and the condenser fan motor.
3. Avoid mold growth and contaminated spotted ice.
4. Properly maintain line coolers won’t cause system oil and capillary tube breakdown.
5. Proper door seal reduces energy consumption and extends life of equipment.