Leak Testing; How To Save The Refrigerant Charge - Compu-aire SYSTEM 2100 Installation, Operation And Maintenance Manual

3) Start the compressors check the level in the sight glass. If the level has lowered, add
additional freon to maintain the sight clear. After charging is complete, reset the high
pressure switch.
Approximate charge required per circuit:
As recommended by ASHRAE MANUAL.
Total Charge = Basic Charge + Liquid Line Based on Hermetic Compressor Line and
Refrigerated Liquid at 100F.

8.10 Leak Testing

No installation is complete until the entire system has been thoroughly checked for leaks.
This includes water tubing, humidifier make-up water, and condensate lines (if provided).

8.11 How to Save the Refrigerant Charge

The process of opening a refrigerant circuit of the Compu-Aire System 2100 and saving the
refrigerant charge of the system to be opened requires only a few more minutes than does
blowing the refrigerant charge. Intentionally blowing the charge is illegal.
The procedure for saving the refrigerant charge is as follows:
1) Open disconnect switch.
2) Pull fuses on system not to be opened.
3) Install manifold on the receiver at each rotolock valve, using the high pressure gauge and
the charging hose.
4) Purge the hoses to remove any con-condensables.
5) Start the unit and set the thermostat at 40 degrees F; this will start the compressor.
6) Return to the receivers.
7) Backseat the rotolock valves on the system being pumped down. Open gauge
androtolock valve on the other system.
Rev. 01
05/27/2016
Page 23 of 42
Compu-Aire