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Customer Service

Warranty Information

HVAC Service Documents

Recommended Charging Procedure
Charge Determination
Basic Troubleshooting
R134a and PAG Oil Handling
Compressor Oil Handling
Compressor Troubleshooting
Blower Motor
Glossary of Common HVAC components

Gauge Diagnostics

Using Gauges for Troubleshooting
Air in cooling system (insufficient suction)
Defective expansion valve
Excessive refrigerant
Insufficient compressor operation
Insufficient refrigerant
Moisture Intrusion
Refrigerant does not circulate

Summary Table of Gauge Diagnostics



R134a and PAG Oil Handling Practices

  1. Wear eye and hand protection when working with A/C system.

  2. The A/C is under high pressure whenever refrigerant is in the system. Take necessary precautions when servicing any systems under pressure. Do not release R-134a into the atmosphere  

  3. Use gloves when charging a system. Coolant can cause freezing of body tissue.    

  4. Never introduce compressed air or oxygen to any refrigerant container or component.  R-134a A/C system in the presence of air or oxygen above atmospheric pressure may form a combustible material.   

  5. Use approved R134a recovery-charging equipment including weight scale and vacuum pump.  Non-use of one or both will reduce capacity of system, or cause component failure in the system.   
     
  6. Use only approved heating devices with calibrated weight scale when charging.    

  7. Use only approved heating device when working with R134a. 

    DO NOT STORE OR HEAT REFRIGERANT CONTAINER AND EQUIPMENT ABOVE TEMPERATURES OF 125 DEGREES FAHRENHEIT (52 C)

      

  8. Do not mix R134a with any other refrigerants. If refrigerants are mixed failure is likely to occur.   

  9. The specified R-134a lubricant will adsorb moisture from the atmosphere at an extremely rapid rate.

    DO NOT LEAVE PAG BOTTLES OPEN TO THE ATMOSPHERE.

     

  10. Keep PAG oil lubricant in metal cans, not plastic.
For our Seltec brand compressors the only warrantable oil allowed is PAG oil ZXL100 PG (DH-PS). Your compressor comes charged with 5-7 oz. of PAG oil.  Consult compressor manufacturer for any additional oil charge necessary with new system installations, as this may be necessary. 


Information obtained in ZEXEL Service Manual
Basic service procedures for R134a Air Conditioning Systems.
Copyright 1992
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Perrin Manufacturing is committed to providing you with superior products and services; we renew this pledge through continual improvement of our products and motivation of our staff.

We faithfully comply with all of the requirements of our ISO 9001:2008 Quality Management System, the most current edition of the standard. Beyond that, our highly trained quality staff persistently search for new ways to improve the effectiveness of our system.
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