7
ZXI Vapor Injected
Scroll Compressor
Vapor Injection control EXV
Vapor Injection Tube
To Compressor
Vapor/ Liquid Sub Cooling PHE
Condensing Unit Handling
Transport and Storage
Move ZX/ZXD/ZXL unit only with appropriate mechanical or
handling equipment according to weight. Keep in the upright
position.
Do not stack single boxes on top of each other without
pallet in any case.
Keep the packaging dry at all times.
Application Guideline
In ZX MT units, suc
tion line injection is applied to the compressor suction. Suction line injection allows a reliable and efficient MT
envelope of up to -15°C (R22) and -20°C (R404A) evaporating temperature. In suction line injection, a part of liquid refrigerant is
added into the compressor suction gas. Suction injection de-superheats the suction gas and controls the compressor discharge
temperature. This is implemented through electronic control by the E2 controller and an electronic expansion valve (EXV). The E2
monitors the compressor discharge temperature and optimizes the opening of the EXV for optimal discharge gas control.
In ZXL LT units, vapor injection is applied to the compressor. Vapor injection enhances the compressor efficiency by applying 2-stage
compression with an economizer refrigeration cycle. Vapor injection eliminates the need for liquid injection, which would otherwise
have been required to operate a reliable LT envelope down to -40°C evaporating temperature. In vapor injection, a part of liquid
refrigerant is expanded and passed through a heat exchanger. In the heat exchanger, this expanded refrigerant absorbs heat from the
main liquid line and sub-cool the main liquid. The expanded refrigerant vaporizes while passing through the heat exchanger and is
supplied back into the scroll intermediate pockets through the vapor-injection tube. The sub-cooling of the main liquid increases the
compressor capacity by as much as 30%. The figure 14 below identifies the key components of the vapor injection assembly.
Figure 07:
Key Components Of The Vapor Injection Assembly
2
2
1
1
max
300 Kg
Storage
Transport
max
300 Kg
max
300 Kg
Net Weight
ZX
ZXD
ZXL
Model
Weight (kg)
Model
Weight (kg)
Model
Weight (kg)
ZX0200/E
76
ZXD0400/E
2
104
ZXL0200/E
79
ZX0250/E
79
ZXD0500/E
3
112
ZXL0250/E
81
ZX0300/E
79
ZXD0600/E
4
114
ZXL0300/E
81
ZX0400/E
1
91
ZXD0750/E
5
122
ZXL0350/E
93
ZX0500/E
108
ZXL0400/E
93
ZX0600/E
112
ZXL0500/E
106
ZX0750/E
118
ZXL0600/E
116
ZX0760/E
121
ZXL0750/E
121
Notes:
1
100 kg for models under 60 Hz TF5/7 and 50 Hz PFJ
2
109 kg for models under 60 Hz TF7
3
117 kg for models under 60 Hz TF7
4
121 kg for models under 60 Hz TF7
5
127 kg for models under 60 Hz TF7
