3. System Configuration
3.1 System components
3.2 Selection of the heat exchanger (air handling unit)
3.2.1 Contamination control
Control the contamination to keep proper quality of the models using HFC refrigerant.
Residual water content
Residual oil content
machining oil content)
3.2.2 Specifications of the heat exchanger
Refer to the LEV Kit applications guide for information on heat exchanger selection.
Specifications are subject to change without notice.
The content shall be less than 1.3E-3 oz/gal [10 mg/lit.].
The low residual oil pipe 5.4E-6 oz/ft [0.5 mg/m] or less shall be used
for heat exchangers.
For long piping connected or piping tended to be stagnated with oil, the
content shall be less than 3.2E-5 oz/ft [3 mg/m]. For other piping,
9.7E-5 oz/ft [9 mg/m] or less shall be applied.
The content shall be less than 8.2E-5 oz/ft
No chlorine content shall be found inside the refrigerant circuit.
Ⓐ Air handling unit
Ⓑ Air handling unit (field
Ⓒ Controller (field supply)
Ⓓ Outdoor unit
Ⓔ Heat exchanger (field
Ⓕ Gas Pipe (field supply)
Ⓖ Liquid Pipe (field
Ⓗ LEV Assembly
Ⓘ Thermistor (gas pipe)
Ⓙ Thermistor (liquid pipe)
Ⓚ Thermistor (suction air)
Ⓛ Thermistor (discharge