C6.1.6/0613-0915/E 7
2.7.5 P&I diagram for ZXLE units
IMPORTANT
No insulation on liquid line! Air moisture condensation and lack of
performance! Moisture will condensate on the liquid line and cause water
droplets. The liquid line can pick up additional heat from the ambient which
will adversely affect the sub-cooling desirable for the liquid refrigerant before
it enters the expansion valve. Insulate both the suction and liquid
interconnecting piping between the ZX unit and the evaporator.
Figure 4: P&I diagram for ZXLE units
High efficient Copeland Scroll ZX
Condenser with 1 or 2 fans
Liquid receiver with service valve
Plate heat exchanger for enhanced vapour injection (EVI)
Expansion device for enhanced vapour injection (EVI)
Filter drier / sight glass combination
Service valve, liquid line
Service valve, suction line
Pressure switch, adjustable, low pressure, not factory mounted
Pressure safety switch, not adjustable, high pressure
Suction pressure sensor, low pressure
Pressure sensor, high pressure
Discharge temperature sensor
Ambient temperature sensor
Vapour in temperature sensor
Vapour out temperature sensor
Table 6: Legend of the P&I Diagram for ZXLE units
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