Emerson Copeland EazyCool ZXME020E - Figure 4: P&I Diagram for ZXLE Units

8 C6.1.6/0117-1017/E
2.8.5 P&I diagram for ZXLE units
IMPORTANT
Absence of insulation on the liquid line in ZXLE units! 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. Both the suction and
liquid interconnecting piping between the ZX unit and the evaporator should
be insulated to avoid condensation.
Figure 4: P&I diagram for ZXLE units
Position
Description
Comments
Fast access
menu
1 (M1)
High efficient Copeland Scroll compressor
2
Oil separator
Pre-charged with 0.5 L
3
Check valve
4 (M2)
Condenser with 1 or 2 fans
5
Liquid receiver with service valve
6
Plate heat exchanger for enhanced vapour injection
(EVI)
7 (Y1)
Expansion device for enhanced vapour injection (EVI)
8
Filter drier / sight glass combination
9
Service valve, liquid line
10
Service valve, suction line
11
Liquid separator
PSL (S2)
Adjustable low-pressure switch (not factory mounted)
System safety (option)
PSH (S1)
Non-adjustable high-pressure switch
System safety
PTL (B1)
Suction pressure sensor, low pressure
Compressor setpoint
P1P
PTH (B2)
Pressure sensor, high pressure
Fan speed control
P2P
TT1 (B3)
Discharge temperature sensor
Compressor safety
P3t
TT2 (B6)
Ambient temperature sensor
Additional functions
P6t
TT3 (B4)
Vapour in temperature sensor
EVI control
P4t
TT4 (B5)
Vapour out temperature sensor
EVI control
P5t
Table 6: Legend of the P&I diagram for ZXLE units