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
Completing the A/C Best Practices on our Youtube channel ATCTV, we feature
How To and Which Components to Inspect
Examining Compressor Failures
Thermistor Kit for Navistar
Arctic Traveler Canada is always focused on the application of Air-Conditioning, Heating, Pressurization and Refrigeration of cabins and cargo areas of mobile vehicles, both on-road and off-road. As a Master Stocking Distributor, ATC offers Air Conditioning systems and replacement parts for any heavy duty vehicle. Call 1-800-295-4156 or visit www.atc.ca for more information.
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
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.
Wondering why your system has a low refrigerant charge?It could be because of a leak that needs repair, or a high-side blockage that limits refrigerant flow to the compressor. Diagnose those problems first, and if not resolved, perform this simple 4 step A/C compressor function check, before you remove the compressor from a vehicle.
Service Tip: Remember when you open the A/C system, you should change your filter drier to remove contaminants and minimize damaging moisture in the system.
4 step tech tip1. 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, there may be 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 for a 12 vdc system and 11.2 to 17.6 ohms for a 24 vdc system? Any resistance outside these ranges will prevent the clutch from engaging or will cause used circuits to open. If the resistance measures correctly, continue to Step 4.
4. Is the compressor able to produce 350 psig or more? The compressor should be able to build over 350 psig on the high side with the condenser airflow restricted, and also able to pull the suction side down to 5 psig when the TXV is closed. If needed, the technician can close the TXV by chilling the charge head using a can of dust-off held upside-down.This will temporarily freeze the TVV charge head and cause it to close. If the compressor is operating correctly, the suction pressure will drop below 5 psig.
Need more info. Go to our blog, ATCNEWS or view more tips on the links below
Arctic Traveler Canada has a complete line of replacement parts & HVAC systems for all makes, any HVAC Part or System. Call us today for more information .
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.
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”.
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.
With over 55 years of experience that Arctic Traveler Canada has in Mobile HVAC and Pressurization of cabins, we successfully design, manufacture, distribute and service industry-leading mobile HVAC equipment. However that is not all that we do, we also service the GTA with hose repairs and replacements. Any problems you have, you can be assured that your solution will be right here at ATC. With today’s wide range of fittings and hose, finding a replacement hose could not be any simpler, with it right here at ATC. Be it an OE replacement, repair, or getting a custom-made hose, everything can be found at ATC. Read below to find out all the options available to you.
OEM Replacement Hose Assembly
Compromising and settling for anything less than what you are looking for has no place at Arctic Traveler Canada. When it comes to OEM replacements and Hose Assemblies for Freightliner, Kenworth, International, Paccar and Peterbilt, ATC has exactly the high-quality products you need.
To find out more, browse the OEM Replacements here.
Hose Building and Repairs
Today, many hose-sets come with metal tube sections, some of which we already offer.
However, in case, no suitable fitting is available, using a hose to replicate the metal tube is a no-compromise option. Our parts department can build you virtually any type of refrigerant hose, be it metric, standard, aluminum or steel. The best part is, in most cases, we’ll build it while you wait. View How To Repair AC Hose here.
We make hoses based on the specifications provided by the customer. In the past, finding a supplier capable of doing hose repairs was challenging, however, with today’s wide range of products and given that the replacement does not need to be from the original manufacturer, your replacement could be right here at ATC.
Truck Hose Program
We not only custom build and repair refrigerant hoses but also set up retailers and fleets with their own A/C hose programs. The programs we offer are customized to meet your exact needs and requirements, complete with inventory and training. Having the right parts to ensure your fleet runs as expected or satisfy your customers’ needs, either way, we can ensure that downtime is kept to a minimum.
Contact Us today to find out more at 800-295-4156.
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. In the past it was difficult to find a manufacturer capable of making replacement coils but with today’s manufacturing processes aided by Computer Aided Design (CAD), consumers have quality choices, at competitive prices.
This TK210Carrier replacement is an intricate combination Radiator & Condenser Coil (08-60086-04-SP).
It hi-lights some of our abilities and proves what 30 years of experience can do for you.
Custom Coil Canada (CCC) – Operates as an independent division of ATC and produces heat exchangers used on Arctic Traveler Canada and Advanced Temperature Control products, providing a unique capability of being able to react quickly to specialized requests.
We’re able to do site visits and build replacement coils based on samples provided and our staff support includes engineering personnel using SolidWorks 3D modeling software, who can also conduct coil heat load calculations and design.
Whether you need individual coils, large coils for heating and cooling buildings or production runs for retrofitting an entire building or complex, if you’re in need for replacement coils or a type of heat exchanger, we can help.
Call Custom Coils Canada at 905-789-8523 to discuss your needs.
Clogged, dirty filters restrict airflow and reduce a system’s efficiency. When airflow is restricted, the air that bypasses the filter will carry dirt directly into the evaporator coil and reduce the coil’s heat-absorbing abilities. To ensure efficiency, routinely clean or replace filters.
The condenser and evaporator coils collect dirt over time but a clean filter helps to keep the evaporator performing well. Debris reduces air flow, insulates the coil and reduces its ability to absorb heat. Being exposed to the elements, it is easy to see the dirt collecting on the fins. Cleaning the coil fins and removing any debris around the coil will ensure optimal performance.
The aluminum fins on evaporator and condenser coils are easily bent and can block airflow through the coil. Air conditioning wholesalers sell a tool called a “fin comb” that will comb these fins back into their original condition.Remember to always use caution when performing preventative system maintenance, as ambient conditions (heat load) will increase refrigerant hose temperatures and don’t forget, having the right quality parts on hand makes all the difference.
See How To and Which Components to Inspect and watch this video to learn more about Basic A/C Troubleshooting.
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.
Tech Tips from Red Dot
1. Inspect Electrical Connections
As you perform a visual inspection under the hood (cab) and/or at the rooftop condenser, take a moment to check all electrical connections both visually and by feel. Make sure all leads and wires are properly supported and securely connected, and that there’s no corrosion or grime on the leads or connectors.
2. Check Electrical Current Flow and Device Functions
Perform the following steps to check the current flow and electrical device functions:
- Turn on the ignition.
- Turn on the A/C system. This will power the thermostat and clutch. If it does not come on, use the A/C mode switch to check the leads to the switch. You should hear a “click” from the thermostat and hear the clutch drive plate “snap” against the clutch pulley.
- Check fuses. If all the connections are clean and tight and there’s still a failure, check the fuses in-cab as well as in-line.
- Check A/C clutch engagement. Since you can’t see and may not hear the clutch engage, get out and look at the clutch. If it’s engaged, you will see that the drive plate is against the pulley and not slightly spaced from it. If you aren’t sure the clutch is engaged, look for the lead wire connector near the clutch. Break and close that connection. The clutch will disengage and engage again.
- Test blower speed operation. Some systems have a common switch that turns on the air conditioner and powers the blower motor. Test blower speed operation by adjusting this or the separate blower control switch. Feeling the air flow from the ducts or note blower sound (speed) changes.
- Inspect roof-mounted condensers. Don’t forget to inspect roof-mounted condensers and A/C units for dirt and debris. Be sure the condenser fan(s) are working properly and all parts and electrical connections are securely fastened. The roof-mounted condenser fans may come on when the system is turned on. Like the thermostat and most clutches, the normal on-off cycling action cannot be observed until the engine is running with the A/C system on.
Quick Heater Service Tip from Reddot
- When the status is “heater fan doesn’t work,” check the ground connection for rust, paint, grime, or some other obstruction at the terminus.
- If the motor doesn’t have a ground wire, its mount serves as a ground connection. Make sure nothing impedes the mount’s ground path.
- Use a multimeter to make sure you’re getting full voltage to the motor. Once you know the voltage is adequate, you can then look for worn brushes, dirty squirrel-cage fans, damaged fan blades, and other more typical motor problems.
Arctic Traveler Canada is an MSD/Master Stocking Distributor and Authorized Technical representative for many industry-leading products. Call us today at 1-800-295-4156 to see what 55 years of excellence can do to achieve your business objectives.