Service Tools, Service Procedures | Heat Controller R410A guide

R410a Application and Service Guide

Figure 1. PPM of Water Absorbed Over Time

POE: Continues to absorb moisture

PPM of

Water

Mineral Oils: Max water absorption, excess separates

24 hrs

Time

•A vacuum pump will not adequately remove mois- ture from the POE lubricants. Use a filter drier and replace whenever the system is opened.

•POEʼs can be irritating to the skin

•POEʼs can damage some roofing membrane materi- als

•POEʼs are better solvents than mineral oils

•Leave POE Refrigerant circuits open no more than 15 minutes

Approved POE Oils for Copeland R410a and R407c

compressors are:

•Copeland Ultra 22CC

•Copeland 3MA (scroll compressors only)

•Mobil EAL Arctic 22CC

•ICI (Virginia KMP) Emkarate RL32CF

•Thermal Zone 22CC

Service Tools

It is recommended that a separate R410a tool set be em- ployed to avoid the problem of mixing refrigerants on the job site.

Gauge Manifold Sets

A specific gauge set for use with R410a is required. These will allow pressure measurements to 800 psig on the high side and 250 psig on the low side. Hoses should have a service rating of 800 psig.

Vacuum Pump

A 500 micron evacuation IS NOT ADEQUATE to sepa- rate moisture from POE oil in R410a systems. It is for this reason that an R410a approved liquid line filter drier should be installed everytime the system is opened.

Leak Detectors

An approved leak detector for HFC refrigerants can be

used in R410a systems. Older R22 leak detectors and Ha- lide torch leak detectors can not be used in R410a service. NEVER use a mixture of air and R410a to leak check.

The mixture may become flammable at pressures above amtospheric. Nitrogen and trace R410a or nitrogen alone can be safely used for leak testing in R410a systems. Six approved leak detector types for alternative refrigerants are:

•Non-selective detectors

•Halogen specific

•Compound specific

•Infrared based

•Flourescent dyes

•Ultrasonic

Active Recovery Equipment (Self-Contained)

Due to the increased pressure of R410a, recovery equip- ment has been redesigned to handle these higher pres- sures. Recovery equipment rated for R410a must be used. Recovery cylinders must have a service pressure rating of 400 psig (DOT 4BA 400 and DOT 4BW 400 are accept- able). DO NOT USE STANDARD DOT RECOVERY

OR STORAGE CYLINDERS WITH A 300 PSIG RAT- ING WITH R410A!

Other Service Tools

Other service tools such as the micron gauge and vacuum pump are adequate for both R22 and R410a service.

Service Procedures

Leak Detection

If an R410a system develops a leak, the technician does not have to recover the the remaining refrigerant from the system before topping-off the system. Because R410a is close to being an azeotropic blend, it behaves like a pure compound or single component refrigerant. The techni- cian can use the existing refrigerant in the system after leaks have occurred. There is no significant change in the refrigerant composition during multiple leaks and re- charges. However, the service technician must remember that when adding R410a to the system, it must come out of the charging cylinder as a liquid to avoid fractionation and for optimum system performance. If the refrigeration system has lost its complete charge, the system should be leak checked, repaired, liquid line filter drier replaced and evacuated below 500 microns. A digital scale or a calibrated charging cylinder designed for the greater pres- sures of R410a should then be used to recharge R410a back into the system.

The Refrigerant Recycling Regulations Section 608 of the Clean Air Act states that the technician must find and

repair substantial leaks of systems with 50 lbs. or more of

refrigerant. Substantial leaks are defined as:

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R410A specifications

The heat controller R410A is a modern refrigerant that has gained significant popularity in recent years, particularly in air conditioning systems and heat pumps. As an environmentally friendlier alternative to older refrigerants, R410A is primarily composed of a blend of two hydrofluorocarbons (HFCs): R-32 and R-125. This combination offers several advantages, making it a preferred choice for both residential and commercial heating and cooling applications.

One of the main features of R410A is its high efficiency. This refrigerant operates at higher pressures than traditional refrigerants like R22. As a result, systems designed to use R410A can achieve higher cooling capacities and overall energy efficiency. This leads to better performance and lower energy consumption, which is beneficial not only for the environment but also for consumers seeking to reduce energy bills.

Additionally, R410A is designed to have a significantly lower ozone depletion potential (ODP) compared to older refrigerants. It has an ODP of zero, meaning it does not contribute to the depletion of the ozone layer, aligning with global efforts to protect the environment. Furthermore, R410A has a lower global warming potential (GWP) than many traditional refrigerants, which further enhances its reputation as an eco-friendly refrigerant option.

When it comes to technologies, R410A has been integrated into various heat pump and air conditioning systems, many of which utilize advanced inverter technology. This technology allows the compressor to adjust its speed according to the cooling or heating demand, optimizing energy consumption and enhancing comfort levels. Additionally, systems using R410A are often equipped with enhanced heat exchange surfaces, allowing for better heat transfer and overall system efficiency.

Another characteristic of R410A is its compatibility with modern lubricants, which improves system performance and reliability. These lubricants are specifically formulated to work effectively with R410A, ensuring that systems maintain optimal efficiency throughout their operational lifespan.

In summary, the heat controller R410A boasts a range of features, technologies, and characteristics that make it a leading choice in the HVAC industry. With its high efficiency, low environmental impact, and compatibility with advanced systems, R410A continues to play a pivotal role in modern heating and cooling solutions. As the industry moves toward greener alternatives, R410A stands out as a viable refrigerant option for the future.