The APR Control is designed to modulate based on entering air conditions at the evaporator. If your system is going to be running in low ambient conditions, please refer to the manufacturer’s recommended low ambient kit. The APR Control is NOT a low ambient control.
No, the APR Control must not be insulated as this would reduce the effectiveness of the APR Control’s operation. The heat is shed through the wall of the desuperheating chamber.
Yes, this is as critical as any step in the installation of the APR control. The insulation needs to be properly installed and completely covering the APR Control valve bulbs. The insulation needs to be adequate to protect the bulb from the ambient temperature.
The Sensing Bulbs connected to the APR Control valves will be installed between the Tee connecting the APR to the suction line and the compressor. These bulbs must be strapped to the suction line and properly insulated. Equalizer Lines (where the APR Control has such connections) will tap into the suction line between the suction line Tee and the compressor.
Yes for every APR Control, there will be at least 3 connections that need to be made (some have 4). All piping connection will be made within the compressor compartment of the condensing section/unit.
The Compression Ratio Reduction Valve (CRR Valve) should be piped into the compressor discharge line, after the compressor before the condenser.
The Mixed Gas Discharge line of the APR should be piped into the suction line after the evaporator and towards the inlet of the compressor.
The liquid line….
Please follow our piping diagram included in the box with your APR Control and can be found Here… (Link)
Yes, the APR should always be securely mounted in the vertical position!
You also want to avoid creating traps while installing field piping. Don’t want these lines filling up when APR not active. Be sure to follow standard piping best practices.
Every job is unique, if you have any concerns field free to call us. Also check out our installation video.
We recommend Harris Products Stay-Silv 15 or equivalent 15% silver alloy.
Much like a TXV or any other device added to the refrigerant system, you need to provide protection from excessive heat when soldering or brazing the APR Control.
No, the chamber holds no charge. If you have any questions or concerns, please call our Technical Support team!
No. It is preferred to install the APR inside the unit housing, but it is also ideal to have access to the control. If exterior installation is preferred, make sure there is limited access to the unit from the general public.