Application guidelines
9
FRCC.PC.023.A7.22
Single compressors
Technical specifications
Compressor specifications
Frequency converter
specifications
Compressor model
Swept
volume
(cu.in/rev)
Displacement
Oil charge
(oz)
Net weight
(lbs)
25 rps
(cu.ft/h)
50 rps
(cu.ft/h)
60 rps
(cu.ft/h)
100 rps
(cu.ft/h)
VZH088
5.39
272
544
657
1088
112
121
VZH117
7.13
357
717
869
1434
122
134
VZH170
10.39
523
1045
1261
1914
228
247
Mains supply voltage
T2: 200 - 240 V +/-10% (3-phase)
T4: 380 - 480 V +/-10% (3-phase)
T6: 525 - 600 V +/-10% (3-phase)
Supply frequency
50 / 60 Hz
Output voltage
0 - 100 % of supply voltage
Inputs
6 digital (0 - 24 V), 2 analogue (0 /±10 V or 4 - 20 mA, scalable)
Programmable outputs
2 digital (0- 24 V), 1 analogue (0-24 V), 2 relay
Protection functions
Over-current protection, low / high current handling
Compressor functions
Discharge gas temperature protection, pressostat / thermostat function, short
cycle protection, oil return management
Oil injection control
Bearings lubrication
VZH compressors are equipped with an oil
injection system that makes the compression
pockets more tight thus improving the isotropic
efficiency of the compressor as well as controls
the oil circulation ratio, at all running speeds.
The frequency converter via an oil injection valve
controls this system. The oil injection valve is a
normally closed valve. At low speed, the valve
is closed and the oil is injected to the scroll set
suction ports.
The compressors are delivered with no coils.
208V-240V or 24V coils are available as accessory
(refer to “Accessories” section). The coil must be
installed for oil injection control.
Control parameters are factory preset but
accessible on the parameter list as read only
values.
Optimal bearings lubrication is ensured by a
gearotor oil pump at all compressor speeds.
