Delta InfraSuite RDA037, Руководство пользователя

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3.4 System Management
For detailed information of system management, refer to the Installation Manual. The Manual
contents are for reference only.
3.4.1 Charging Refrigeration Oil
While the compressor is operating, the lubricant inside it will more or less be brought outside
the compressor by the high pressure and high-speed refrigerant gas. Therefore, it is
necessary to add refrigeration oil to the refrigerant system. Different piping lengths will
require adding different amounts of refrigeration oil. If the length of the piping is more than
50m (164 ft), one must add refrigerant oil (FV50S) from the schrader valve in front of the oil
separator inlet. Charge 7c.c. refrigerant oil per lb of charged refrigerant.
3.4.2 Pressure Leak Test
After the indoor and outdoor units are connected, introduce nitrogen gas (3.0 MPa) through
the shutoff valve behind the electronic expansion valve and the liquid pipe schrader valve.
Pressure must be retained for 24 hours without leakage.
(Figure 3-31: Schrader Valve Location)
Schrader Valve for Filling of the
Refrigerant
Liquid Pipe Schrader Valve