Proper A/C system performance is achieved with many components working together to provide cab comfort for the driver and passengers. The item that receives the most attention is the Compressor. The compressor operates as the “pump” of the system, keeping the refrigerant circulating and increasing the refrigerant’s pressure.
All compressors have two sides: Suction and Discharge. The refrigerant is drawn into the compressor’s suction side as a cold-low pressure vapor and then is compressed, thus raising the refrigerant pressure and temperature. The high pressure-high temperature vapor refrigerant is then pumped out of the compressor’s discharge side to the condenser.
As the compressor moves the refrigerant through the system, the refrigerant oil also moves with the refrigerant.
Why are compressors removed?
1) Loss of a refrigerant charge – Cold refrigerant entering the compressor on the suction side coming from the evaporator provides cooling to the compressor. With a loss of refrigerant, the compressor overheats. Also, with a loss of refrigerant, the oil is not returned back into the compressor and eventually the compressor will run dry.
2) Contamination – Particles found inside the system will cause internal damage to your system. These particles can cause blockage at the condenser, expansion valve or damage to the internal parts of your compressor. Contamination must be removed from the system by using the correct flushing procedures.
3) Misdiagnosis – Change the wrong part is a common procedure in repair A/C failures. The system must be properly diagnosed before changing parts and pieces.
What are the most common causes of compressor failures?
1) Low Refrigerant Charge
2) Leaks with the System
3) Contamination in the System
4) Lack of Lubrication
5) Clutch Failure due to System Failure
6) Blockage or Restriction within the system
7) Insufficient Condenser Cooling
What happens if a compressor continues to run under a low refrigerant charge?
1) Overheating of the compressor occurs.
2) Refrigerant oil circulation slows down and returns very little back to the compressor
3) Without proper lubricant and refrigerant charge, the compressor will “lock-up” and destroy the compressor.
4) The critical low charge point is reached when the system has 50% or less of the recommended refrigerant charge.
5) Disabled or Malfunctioning switches that allow the compressor to run in a low charge situation.
With mechanical reliability at all-time highs, heavy-duty A/C components rarely fail. In fact, components mainly fail because of the contaminated refrigerant oil and general lack of preventive maintenance. Proper maintenance increases operating time and saves money by identifying concerns before they become problems.
More Pre Season maintenance tips
A/C Preventative Maintenance
How To Inspect an A/C Compressor
A/C Compressor Check Up
How To Troubleshoot your A/C Electrical system
Compact floor mount A/C and Heater for smaller commercial & industrial applications.
Arctic Traveler Canada is a proven and trusted specialist in mobile climate control and engineers a wide range of HVAC solutions for Commercial and Industrial applications. With engineered products in Agricultural, Construction, Forestry and Mining, we take pride in designing and manufacturing purpose built HVAC solutions. From concept to design using three dimensional images created in Solid Works, to manufacturing and delivery, all products are engineered to exact specifications to meet your expectations.The ATC #890131 A/C & Heater is perfect for smaller applications and offers enough performance to ensure optimum year round operator comfort. With 14,000 BTU of cooling and 19,000 BTU of heating, it provides powerful heating and cooling with the compact size you need for tight spaces. Recently updated (pictured below) to include a digital controller with temperature display and an Electrical panel that provides fused output to power Condensers, Compressor Clutches and Hot Water Valves.
Are your Tow Motor operators in need of additional comfort for the hot summers and cold winters?
ATC’s compact A/C and Heater could be the solution. It’s 15″ x 10″ & 12″ dimensions creates a package that’s small enough to fit almost anywhere, yet provides maximum performance with minimal maintenance.
* Welded steel construction * Proven reliable performance * 360° adjustable Air outlets * Heavy duty permanent magnet motor * Variable speed blower
The indoor air quality is critical to providing a healthy and productive work environment as operators spend a great deal of time in the cab of their equipment. Cab pressurizers are highly effective at removing particulate as well as vapours and fumes and are manufactured to withstand the rigours of the harshest off-road and mining environments.
For this application, we added a solution consisting of a pressurizer housing, pre-cleaner and three stage filter element, which has been tested by independent third party labs, certifying the systems provide HEPA (99.97% efficiency @ 0.3 Microns) read more here. The combination delivers clean, filtered air to the #890131 A/C & Heater via the fresh air intake.
Arctic Traveler Canada offers replacement parts & HVAC systems for all makes, any HVAC Part or System.
We also engineer a variety of HVAC solutions for any application in any industry.
Contact Us today for more information.
More Engineered Products from ATCDual Electric Condenser
Wall Mount A/C & Heater
ATC Heaters –
892059 – Dual blowers, 27,000 BTU’s – Click to view specs –
892041 – Dual blowers, 40,000 BTU’s – Click to view specs –
892002 – Dual blowers, 65,000 BTU’s – Click to view specs –
Arctic Traveler Canada is your mobile climate control specialist. Call 1-800-295-4156 for more information or visit us here. From concept to design using three dimensional images created in Solid Works, to manufacturing and delivery, all products are engineered to exact specifications for your specific application.
Arctic Traveler Canada has designed Air Filtration Solutions to ensure vehicle operators are breathing clean cabin air while on the job. Innovating at all levels of Filtration, ATC produces air cleaning systems that continuously protect operators.
Arctic Traveler Canada offers two different Cab Pressurizers or Cab Filtration Solutions. Both systems continually supply fresh filtered air into the cab creating a positive pressure inside a properly sealed cab. This over-pressure pushes clean air out leaks in the positive pressure side of the system, rather than allowing contaminated air to enter. The indoor air quality is critical to providing a healthy and productive work environment and whether it’s agriculture, construction, mining or waste management, operators spend a great deal of time in the cab of their equipment.
Cab pressurizers are highly effective at removing particulate as well as vapours and fumes. The filter element can also be customized to target specific contaminates present where your equipment is working. A differential pressure gauge or electronic pressure control system are available to measure the difference in pressure between the inside and outside of the cab.
Mining operations using dual Enginaire’s precleaners and ATC’s Air Filtration 200 solution (896068)
Tow motor fleet utilizing ATC’s Air Filtration 60 solution (896052) to provide a pressurized cabin and clean air for operators.
The Cabaire system which incorporates Enginaire’s proven air precleaner,with a patented in-line filter to make a highly efficient pressurizer that ensures clean filtered air.
Cab Filtration Solutions
Cabaire™ cab pressurization unit (ECP) combines their proven air precleaner with our proven VLR air filter system to give you a very efficient self contained filter air pump. As air is drawn into the air conditioner, the Cabaire removes the large dirt particles with the built in centrifugal precleaner.
The air is then filtered and blown into the air conditioner intake duct with our self contained air pump. All in a very small space. By having a positive pressure on the incoming air chamber, the air conditioner can do it’s job easier with less power required. Even when the air conditioner is not being used, the clean air from the ECP is blown into the cab creating a positive pressure which prevents dirt from entering the cab through leaks in it’s doors and other spaces.
Enginaire’s Cabaire™ uses it’s own high pressure air pump not a fan to deliver a high volume of dual filtered air into your enclosure which then has a positive air pressure on the inside. When the enclosure has a positive pressure, dirt is forced out of the doors, windows, and other unsealed areas instead of being drawn into the enclosure. You stay clean, your electronics and other instruments stay clean, while you “breathe easy”.
Heavy Duty HVAC Parts, Supplies, Solutions & Technical Tips
So whether you’re looking for a solution for smaller applications like Tow motors, Agriculture or gigantic machinery in Mining operations, Arctic Traveler Canada has a solution for your application. Call or visit us today for more information and see what 60 years of excellence can do for you.
Spring is here and with it, the return of warmer weather and the start of what we all hope will be another busy A/C season. We want to take this opportunity to remind you of the following resources – ATCPARTS, ATC Connect, Catalogs and our blog ATCNEWS.
Ordering Parts – While we do look forward to speaking with you, we know that sometimes you simply want to “place an order” rather than wait in a queue while we assist others. To better serve you, We encourage you to email us at email@example.com.
ATC Connect – Parts Lookup and Cross Reference made easy
Arctic Traveler provides an exciting tool for HVAC components, ATC CONNECT. This tool provides OEM cross-references, pictures, technical tips, on-hand inventory and so much more. Click here to get access or speak with our Customer Service Reps to start utilizing this exciting and useful tool.
Our Blog ATCNEWS is how we share Best Practices and Technical Tips. With mechanical reliability at all-time highs, heavy-duty A/C components rarely fail. In fact, components mainly fail because of the contaminated refrigerant oil and general lack of preventive maintenance. In this edition, we feature 4 articles on A/C system maintenance and a best-seller list of components by Make.
A/C Preventative Maintenance,
A/C Systems – How a simple inspection can save,
How to inspect an A/C Compressor,
How to troubleshoot your A/C Electrical system,
Best selling mobile HVAC parts by Make.
Completing the A/C Best Practices on our Youtube channel ATCTV, we feature
How To and Which Components to Inspect
Examining Compressor Failures
Cabin Air Filters – Reduce dust, dirt and allergens – A relatively new feature on the automotive scene, the cabin air filter is often overlooked in regular vehicle maintenance. This filter is just as important to the passengers as the engine air filter is to the vehicle and a likely cause of “A/C Not Blowing Cold Air“. A cabin filter processes the air that enters the passenger compartment via the vehicle’s heating and air conditioning system, increasing passenger comfort by trapping particulates, pollen, and other irritants. See more here
A/C Hose Program – Replacements & Repairs
With today’s wide range of fittings and hose, finding a replacement hose could not be any simpler. Whether you need an OE replacement, repair, or getting a custom-made hose, you can find it at ATC. Read more about our Hose Program here.
To view all our offerings, visit Product Lines to access catalog downloads or call us toll-free at 1-800-295-4156, our Customer Service Representatives will be happy to assist you.
Replacement Coils & Heat Exchangers don’t have to be from the original manufacturer.
For over 30 years, Custom Coils Canada has produced replacement condensers, evaporators and heater cores for almost any mobile, commercial or industrial application. CCC services the replacement coil market in the GTA and specializes in building unique heat transfer coils and aftermarket drop-in replacements. Call 905-789-8523 to find out how our 30 years of heat exchanger experience can help you.
Replacement A/C Hose lines don’t have to be from the Original Manufacturer!
How To Repair A/C Hose – In the past, it was difficult to find a supplier capable of doing AC hose repairs, but with today’s wide selection of high-quality fittings and hose, your replacement could be right here at ATC. The Air Conditioning System provides the desired cabin temperatures to ensure operator comfort. The AC hose is used to effectively transfer both liquid and gas between the components and should be inspected for leaks and either repaired or replaced ASAP, to ensure the system continues to perform as expected.
Click here to view an Aeroquip EZ Clip Demo from Reddot
Today, many hose sets come with metal tube sections, some of which we offer. If no suitable fitting is available, using a hose to replicate the metal tube is the next best thing.
Our experience suggests using Aeroquip hose and E-Z Clip may hold an advantage over crimp fittings for replacing metal tubes. Aeroquip EZ Clip & Hose fitting is a simple option for making or repairing Air Conditioning hose lines on heavy-duty trucks, agricultural, construction and other industrial applications. No hydraulic equipment is needed. Rather, a simple, easy-to-use crimping plier enables quick and easy A/C Hose repairs in the field.
Each Aeroquip fitting comes with 2 Clips which slide over the hose and a Cage which locks into the fitting, goes through the cages and is secured with crimper pliers.
This example shows an OE Hose at the top and using 4 Aeroquip fittings and hose, we can quickly provide a quality solution for your application.
The reduced diameter hose enables tighter turns (but not right angles) without concern for “kinks” which would compromise the hose and AC system.Call ATC at 800-295-4156 for all your mobile heavy-duty HVAC parts, supplies and solutions – Burlington, Mississauga or Montreal.
AC Hose Repair using Aeroquip EZ Clip Fittings and Hose is a quick solution for the quick turn around needs and mobile technicians. Providing even greater flexibility, when the E-Z Clip fitting is lubricated with a slight amount of refrigerant oil before it’s inserted into the hose, the direction/index of the fitting can be changed by rotating the fitting in the hose. Once the refrigerant oil used has dried (1-2 hours) the fitting can no longer be turned or re-indexed.
Looking for OEM Replacement lines. Find application specific parts here!
Need an internal Hose Program ? Find more info here!
Take these steps to inspect an A/C compressor to ensure it really needs replacing before you pull it from a heavy-duty vehicle:
1. Is The Compressor Rotation Smooth?
With the vehicle off, turn the compressor shaft with a 14-mm socket. If you feel grinding or hanging as you rotate the shaft, it’s probably due to broken components within the compressor. If the rotation is smooth, move on to Step 2.
2. Is The Coil Getting More Than 11.5 Volts?
Take a reading with the engine running and the clutch engaged. If there’s insufficient voltage, get to work on that. Otherwise, move on to Step 3.
3. Is The Coil Resistance Between 2.8 And 4.4 Ohms?
Any resistance outside this range will prevent the clutch from engaging or will cause used circuits to open. If the answer is yes, continue to Step 4.
4. Is The Compressor Able To Produce 350 Psig Or More?
If not, leave the compressor where it is. The system may have a low refrigerant charge because of a leak that needs repair, or a high-side blockage that limits refrigerant flow to the compressor.
Tech Tips from Red Dot
” We see lots of compressors that are returned fully functional and therefore not warrantable.
Get the diagnosis right. Inspect an A/C compressor before you pull the component from the vehicle.”
For expert insight into common failures and causes, watch Examining Compressor Failures on ATCTV
While there, check out How To and Which Components to Inspect and Basic A/C Troubleshooting to further your understanding of A/C Systems.
For more information about AC Compressors or any HVAC component, call the mobile HVAC specialist Arctic Traveler Canada at 800-295-4156.