Single compressors
Technical specifications
Compressor
specifications
Frequency converter
specifications
Compressor model
Swept
volume
(cm³/rev)
Displacement
Oil charge
(Liters)
Net weight
(kg)
15 rps
(m³/h)
50 rps
(m³/h)
60 rps
(m³/h)
100 rps
(m³/h)
VZH028
27.8
1.5
5.0
6.0
10.0
1.1
26
VZH035
34.9
1.9
6.3
7.5
12.6
1.3
27
VZH044
44.5
2.4
8.0
9.6
16.0
1.3
27
Mains supply voltage
T2: 200 - 240 V +/-10% (3-phase)
T4: 380 - 480 V +/-10% (3-phase)
Supply frequency
50 / 60 Hz
Output voltage
0 - 100 % of supply voltage
Inputs
4 digital (0 - 24 V), 2 analog (0 /±10 V or 4 - 20 mA, scalable)
Programmable outputs
2 digital (0- 24 V), 2 analog (0-24 V), 2 relay
Protection functions
Over-current protection, low / high current handling
Compressor functions
Pressostat / thermostat function, short cycle protection, oil return
management
Oil return management
Bearings lubrication
Oil return management function only works
under auto mode: After running at low rpm
(less than 40 rps) for 19 minutes, the internal
lubrication algorithm in the drive will accelerate
the compressor speed to 40 rps or above for
60 seconds to ensure sufficient lubrication of
compressor moving parts.
Warning:
This function is enabled by parameter 28-10 as
default setting. Please notice when hands on
mode is selected, oil return management will
not work even if parameter 28-10 (oil return
management) is set to on. If compressors run
below 40 rps for more than 19 minutes, oil return
fault alarm (A208) will report on LCP and stop
the compressor. Please select hands on mode
carefully and only select hands on mode if the
OEM has implemented oil return management
in the system controller and qualified oil
management. Under such conditions, the
compressor could run below 40 rps continually
and meanwhile disable drive oil return
management 28-10.
A specific oil pump ensures optimal bearing
lubrication at all compressor speeds. The specific
oil pump provides sufficient bearing lubrication
at low speeds as well as to avoid excessive Oil
Circulation Ratio (OCR) at high speeds.
9
FRCC.PC.034.A2.02
Application Guidelines
