Danfoss VZH028 Series Instructions Manual page 2

Instructions
Oil level switch assembly
Install the screw-in optical part on oil level
switch port. (Factory preset for manifold version
VZH compressor.)
Install the electrical part on optical part. Make
sure the cable outlet downside vertically
Electrical connections / Wiring
1: Power supply wire
3
2: Power supply wire
2
1
3: Output wire
4
4: Not used
See at the correct diagram corresponding
to different power supply models for proper
wiring
24VDC MODEL
24VDC
OVDC
1 2
Sensor 3
24VAC MODEL
24VAC
OVAC
1 2
Sensor 3
External
Load / Relay
230VAC MODEL
L
N
1 2
Sensor 3
External
Load / Relay
2 | AN233086441027en-000201
L1
L2
L3
External
91,92,93
Load / Relay
03,02,01
06,05,04
-: Optional connection
X: Mandatory connection
The CDS803 frequency converter is factory preset with parameters for the open loop control
principle. The process loop control principle can be selected by changing parameters in the «Quick
menu».
Open loop: preset on input 53
0 - 10 V control
Frequency converter in slave mode
Process loop: preset on input 54
4 - 20 mA control
Frequency converter under own PID controller
Basic connections for VZH028-044 drives
91 L1
92 L2
93 L3
95 PE
45 Ana out or Dig out
42 Ana out or Dig out
50 out +10 V
53 Ana in
54 Ana in
55 Ana in/out COM
12 +24V
18 Dig in
19 Dig in
27 Dig in/out
29 Dig in/out
20 Dig in COM
3 phases mains input
95 Earth
42,45 0/4-20 mA Analague Output or Digital Output
50 +10V DC Output
53 0-10V or 4-20mA Analague Input
54 0-10V or 4-20mA Analague Input
55 Com Analague In/Out
12 External On/Off(NO)
18 External On/Off(NO)
19 Digital Input
27 Safety Device
29 Digital Input
20 Com Digital Input
98 To Compressor T3
97 To Compressor T2
96 To Compressor T1
99 Earth
Relay 1
Relay 2
69,68 RS485 Bus
61 RS485 Bus Com
U 96
V 97
W 98
PE 99
NC
NO 02
COM 01
NC 06
NO 05
COM 04
N- RS485 69
P+ RS485 68
COM RS485 61
Legends:
Ana: Analogue
Dig: Digital
in: Input
out: Output
COM: Common
NC: Normally-closed
NO: Normally-open
Open loop Process loop
x
x
-
-
x
-
x
x
x
-
x
-
-
x
x
x
x
-
-
-
-
© Danfoss | DCS (CC) | 2019.03
T1/U
T2/V
T3/W
x
x
-
-
-
x
-
x
x
-
x
-
-
x
x
x
x
-
-
-
-