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HVAC News-Learn about ATC products and services! The latest heavy duty mobile HVAC news, product features, how to procedures including technical tips.

Diagnosis and Troubleshooting A/C Systems

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.

AC System - Replacement HVAC Parts & Supplies - ATC I 1-800-295-4156


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. AC Compressors - Replacement HVAC Parts & Supplies - ATC 1-800-295-4156

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 AC Compressors - Replacement HVAC Parts & Supplies - ATC 1-800-295-4156
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. AC Compressor - HVAC Replacement parts & Supplies - ATC I 1-800-295-4156
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
A/C Systems – How a simple inspection can save
How To Inspect an A/C Compressor
A/C Compressor Check Up
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
Basic Troubleshooting
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.

A/C Compressor Check

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.
AC Compressor - The heart of your air conditioning system.
4 step tech tip
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, 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 .  

Air Filtration solutions

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)

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.

Tow motor fleet utilizing ATC’s Air Filtration 60 solution (896052) to provide a pressurized cabin and clean air for operators.



















Cab Filtration Solutions

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.
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.

A/C Hose Program – Replacements and Repairs

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.
Replacement OEM AC Hose Assembly - Kenworth, Freightliner, Navaistar, Peterbilt

View a Short video on some of the Common Reasons for Hose Assembly Failures 

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.
How To Repair A/C Hose - OEM Hose Repairs and Replacements fro 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.
ATC not only build and repair refrigerant hoses but also set up retailers and fleets with their own programs.
Contact Us today to find out more at 800-295-4156.

A/C Hose repairs

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.
AC Hose Repair with Aeroquip EZ Fittings - Clips and Cage - ATC Heavy Duty Parts & SuppliesAC Hose Repair with Aeroquip EZ Fittings - Clips and Cage - ATC Heavy Duty Parts & Supplies
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.
AC Hose Repairs with quality fittings and hose. Call us today to see what our experience can do for you - 1-800-295-4156

The reduced diameter hose enables tighter turns (but not right angles) without concern for “kinks” which would compromise the hose and AC system.
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.

Call ATC at 800-295-4156 for all your mobile heavy-duty HVAC parts, supplies and solutions – Burlington, Mississauga or Montreal.

Looking for OEM Replacement lines. Find application specific parts here!
Need an internal Hose Program ? Find more info here!

Custom Coils Canada Replacement Coils

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. 
Replacement TK210Carrier Combination Radiator & Condenser Coil 08-60086-04-SP

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. 

Custom Coils Canada produces tube and fin replacement condensers, evaporators and heater cores.Custom Coils Canada specializes in building unique heat transfer coils and aftermarket drop in replacements for high priced OEM coils or as replacements for overseas manufacturers that no longer have parts available in the local markets. We specialize in short run production quantities for small to medium size manufacturers, one-off replacement coils and quick turn around repairs for HVAC, Plumbing and Mechanical Contractors. 
Replacement Coils and Heat Exchangers for condensers, evaporators and heater cores for almost any mobile, commercial or industrial application.

CCC also services the replacement coil market in the GTA with the ability to produce replacement coils within one week (expedited orders). These can be standard HVAC coils or heavy duty designs using our Grilldenser fin which is capable of being pressure washed for harsh environments. Additionally, all of our coils can be Heresite coated for dramatically improved corrosion protection. 

We can produce the following types of coils, using copper tube and aluminum fins:

  • Hot water coils
  • Chilled water coils
  • Evaporator coils
  • Condenser coils
  • Low pressure steam coils
  • Custom made coils

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.

A/C Preventative Maintenance

When it comes to air conditioning, a good preventative maintenance program will increase operating time and save money by identifying concerns before they become problems. Once the hot weather arrives, implementing planned maintenance allows you to schedule repairs instead of reacting to sudden unexpected issues. A/C filters, coils, and fins require regular maintenance to ensure optimum performance and neglecting necessary maintenance results in a steady decline in performance and increased energy use. 

Filters

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.

Coils

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.

Coil Fins

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.

A/C Preventative Maintenance - a regular HVAC PM program will save you money and decrease down time.

A/C System – How a simple inspection can save

RedDot

Tech Tips From RedDot

Heavy-duty A/C system components rarely fail. In fact, the system fails the components because of contaminated refrigerant oil and general lack of preventive maintenance.

One of the best ways to improve uptime and reduce maintenance costs for the customer is to promote a basic visual check of major A/C components, hose connections, and fittings at regular intervals, like with every engine-oil change. This inspection routine has another benefit: it can generate business for your parts and service department. 

Many A/C components are consumable items. It’s more cost-effective to replace them than to repair them. So preventive maintenance is an opportunity to sell a range of OEM-quality all-makes replacement parts for the air conditioner. Here are some examples:

1. RECEIVER DRIERS

The receiver-drier’s moisture indicator provides a quick visual cue about the refrigerant’s condition: a blue dot means the refrigerant is dry; pink, white, or grey indicates acid or moisture in the system. Checking the sight glass during an oil change or any scheduled maintenance procedure means the truck can receive necessary service while it’s there in the shop, before moisture and acid damage critical A/C components and lead to a failure on the road.

2. CONDENSERS

Dust, bugs, feathers, and other debris collect on the face of fins and tubes and act as a thermal barrier, making it hard for the condenser to shed heat. Condensers also fail because of vibration, which can cause hose connections to come loose and fatigue the condenser tubing adjacent to the fittings. Every 12 months, the condenser should be cleaned (taking special care not to bend or damage the fins) and the hose connections securely clamped.

3. COMPRESSOR/CLUTCH ASSEMBLY

The compressor provides the mechanical energy to circulate refrigerant and manipulate the pressure inside the system. It’s the heart of the A/C system, and the No. 1 HVAC maintenance expense item. Excessive noise and poor cooling performance are the two most obvious symptoms that a compressor is failing. Replacing the compressor involves pulling down the system, which adds refrigerant recovery and recharge to the repair cost.

Next time you see, “A/C won’t blow cold air” on a work order, note that the repair and downtime probably could have been avoided with a simple visual inspection of the truck’s air conditioning system. Any time you change the truck’s oil, check the A/C.

Arctic Traveler Canada is a master distributor and technical service expert for many of our suppliers.
Call us today at 1-800-295-4156 to find your HVAC solutions.

More Tech Tips
A/C Preventative Maintenance Tips from RedDOT 
How To Inspect an A/C Compressor
A/C Compressor Check Up
How To Troubleshoot your A/C Electrical system
Why Do a Winter time PM on your A/C System

Why do a Wintertime PM on your A/C system

Tech tip courtesy of RedDOT

If you are wondering about how to increase defroster performance and visibility for drivers, wonder no more. The simple solution is to do a wintertime PM on your A/C system!
Ensure your A/C system runs at optimal performance all year by including a complete HVAC inspection (PM) before winter.

How to increase defroster performance and visibility for drivers. Do a wintertime PM's on your A/C system.

Arctic Traveler Canada (ATC) is a Master Distributor (MSD) for RedDOT HVAC product line. Call us today at 1-800-295-4156 to find your solution.

How to inspect an A/C Compressor

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.