HOW TO CONVERT First, choose the 920or 920R Coalescent Oil Separator. The 920R has a built-in oil reservoir that keeps oil pressure even across multiple systems, with less piping and components, i.e., external oil reservoir. Second, review your Options. 920 Options: Decide if you want to remove or replace the Oil Reservoir and Oil Level Control (OLC)* - If changing the OLC, decide if you want to switch to an Electronic OLC. *Why change? The OLC will be worn-out and full of sediment from years of service. 920R Options: Decide if you want to remove or replace the compressor Oil Level Control (OLC). - If changing the OLC, decide if you want to switch to an Electronic OLC.

Why a built-in oil reservoir? Reduces amount of system piping and components. Reduces number of potential leaks. Creates a stable, high-pressure oil system.

OVERVIEW

• The 920/R Series coalescent oil separator should be installed two (2) weeks before the refrigerant oil is changed to maximize efficiency. This is done first to remove as much excess oil in the system as possible, reducing:
  • the amount of new Polyolester (POE) oil needed;
  • unwanted particles that may clog up the TXV screens and other valves; and
  • the number of oil changes required to dilute the mineral oil below 5%.
• Monitoring and changing the Clean-Up® Filter is essential during the conversion process.
• Changing the oil and refrigerant acts as a cleaning agent and dirt and contaminants will collect in the Clean-Up® Filter.
• Monitor the oil level closely.
  • Once the 920/R Series oil separator is installed, it will remove large amounts of oil from the system.
• Monitoring the pressure drop across the filter using the Pressure Differential Indicator (PDI) is essential during Step 2: Change Refrigerant Oil, and Step 3: Replace Refrigerant.
• Temprite Clean-Up® Filters reduce system particulates down to 3 microns.
  • Once the pressure drop across the Clean-Up® Filter stays below 13 PSID, switch to the Standard Filter and the particulate matter will be further reduced to 0.3 microns.

Step 1: INSTALLATION of the 920 or 920R

Two weeks prior to changing the refrigerant oil:

• Isolate and reclaim refrigerant according to industry standards.
• Replace your current oil separator with the proper-size Temprite 920 or 920R oil separator.
• Remove components no longer needed or to be replaced, i.e., oil reservoir, OLC.
• Install the Pressure Differential Indicator (PDI).
• Install other components, i.e., oil level control, valves, etc.
• Start system and monitor the pressure drop across the oil separator with the PDI.
• Replace the Clean-Up® Filter when the pressure difference is 13 PSID/1 bar PD.
• Remove excess mineral oil.
• Replace known potential leaks, i.e., gaskets, valves.

Step 2: CHANGE REFRIGERANT OIL

Begin changing the refrigerant oil.

• You will need to change the oil until it is at the proper dilution - usually less than 5% residual mineral oil.
  • The number of oil changes is based on the level of residue mineral oil remaining in the POE oil.
• Monitor the pressure drop across the Clean-Up® Filter, replacing it as needed until pressure remains below 13 PSID/1 bar PD.
• The Clean-Up® Filter holds dirt and oil and may need to be replaced at the beginning of each POE change, depending on the amount of contaminants in the system.
• Monitor and replace known potential leaks.
• Continue changing the oil until it is at the proper dilution - usually less than 5% residual mineral oil.
• Once you have reached the desired level of residual mineral oil, you are ready to replace the refrigerant.

Step 3: REPLACE REFRIGERANT

• Reclaim refrigerant per industry standards.
• Replace liquid dryer cores and suction filters.
• Install a fresh Temprite Clean-Up® Filter.
  • Evacuate system.
• Charge system with new refrigerant and start system.
  • Adjust valves, TXVs and controls.
• Continue monitoring the pressure drop across the Clean-Up® Filter, replacing it as needed until pressure remains below 13 PSID/1 bar PD.
• Replace the Clean-Up® Filter with a Temprite Standard Filter.

Step 4: FOLLOW-UP

• Monitor the oil level for six months and adjust accordingly.
• Using the PDI, monitor the pressure difference of the Standard Filter for at least six months.
• Replace Standard Filter as necessary when pressure difference reaches 13 PSID/1 bar.
• Check for refrigerant and oil leaks.
• Monitor system pressures and temperatures.
• Adjust valves and controls as necessary.