Refrigerant Handling; Air Cooled Split System Charging; Controls - Data Aire DAPA-2.5 Installation, Operation & Maintenance Manual

Refrigerant Handling

The use of recovery/recycling units is required by U.S. Environmental Protection Agency (EPA)
regulations. Technicians who service and dispose of air conditioning and refrigeration equipment must
recover the refrigerant instead of venting it to the atmosphere.
Except for extremely small releases of refrigerant such as what occurs when disconnecting service
hoses, a technician who knowingly releases or vents refrigerant to the atmosphere is in violation of this
regulation. Refrigerant purchasers must be certified technicians and have a valid EPA certification card.
This applies to all units with either shell and tube condensers or high-pressure relief valve options.

Air Cooled Split System Charging

Air-cooled condensers provided with Data Aire equipment have integral fan speed controls. The fan
speed control is programmed at the factory to start the fan at a specific head pressure and increase
speed (i.e., airflow) when enough head pressure is developed, the fan will run at full speed. The
programming of this fan speed control is based on the refrigerant (R-410A or R-407C) required by the
order. Please see the Air-Cooled Condenser User Manual for more detailed information on fan speed
control.
5.8.2.1
Pre-Charge Fixed Speed Compressor
1. After the system has been properly evacuated. Calculate the proper charge for each
circuit by following the steps and the data in the tables below.
2. Select the model and refrigerant charge for evaporator section and condenser in
accordance with the following R-410A and R-407C Tables for single and dual circuit
models.
NOTICE: Improper charging procedure could cause compressor damage in
several ways: excessive Low/High Pressure differences, liquid slugging or
vacuum operation. The below system refrigerant charge procedure is strongly
recommended to reduce these risks.
WARNING: Pressure relief lines(s) must be vented to the atmosphere per
the latest edition of ASHRAE Standard 15 and/or any local building, fire
or mechanical codes.
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