Danfoss VLZ028, VLZ044 Installation guide
Instructions
VLZ028-VLZ044 inverter compressors
VLZ028 - VLZ044 compressors can be
A
B
C
D
A: Model number
B: Serial Number
C: Refrigerant
D: Manufacturing year
E: Supply voltage range
F: max operating current
G: Lubricant type and nominal charge
H: Electronic frequency &
compressor frequency
powered by the dedicated variable speed
drive CDS803.
E
When Danfoss drive is selected, check carefully
F
for compatibility between compressor model
and variable speed drive.
G
Compressor
model
H
VLZ028-035-044 7.5 kW
Variable speed drive
rated power output
Electrical connections
Quick connect spade terminals
Operating limits
70
60
50
40
30
20
Condensing Temperature ºC
10
0
-35
-30 -25 -20 -15 -10 -5 0510 15
VLZ R448/449A Operating Map
Condition:135ºC Max DLT
50-100rps
30-100rps
Evaporating Temperature ºC
RGT20
SH10K
push
push
VLZ R404A Operating Map
Condition:135ºC Max DLT
70
60
50
40
30
20
Condensing Temperature ºC
10
0
-35
-30 -25 -20 -15 -10 -5 0510 15
Evaporating Temperature ºC
50-100rps
30-100rps
push
RGT20
SH10K
All the above limits, temperatures and speeds, are secured by parameters in the drive and application controller softwares.
Installation and servicing of the compressor by qualied personnel only. Follow these instructions and sound refrigeration engineering
practice relating to installation, commissioning, maintenance and service.
The compressor must only be
used for its designed purpose(s)
and within its scope of application
(refer to «operating limits»). Consult
Application guidelines and datasheet
available from cc.danfoss.com
1 | © Danfoss | DCS (CC)| 2017.07
Never operate
compressor
without terminal
box cover in place
and secured.
Under all circumstances,
the EN378 (or other applicable
local safety regulation)
requirements must be fullled.
Wear protective goggles and
work gloves.
The compressor must
be handled with
caution in the vertical
position (maximum
oset from the
vertical : 15°).
The compressor is delivered under
nitrogen gas pressure (between
0.3 and 0.4 bar / 4 and 6 psi). Do
not disassemble bolts, plugs,
ttings, etc... unless all pressure
has been relieved from the
compressor.
8510286P01B - FRCC.PI.039.A3.02
RELAY
2
CDS803
Instructions
Basic connections
- Depending on the frequency converter version, the physical position of individual connectors may dier from below diagram.
- Always make sure that the compressor termi-
nals T1, T2, T3 are connected to the frequency
converter terminals 96, 97, 98 respectively.
- The compressor motor cable must be shielded
L1 91 L1 U 96 T1/U
L2 92 L2 V 97 T2/V
L3 93 L3 W 98 T3/W
95 PE PE 99
45 0/4-20 mA A OUT / DIG OUT
42 0/4-20 mA A OUT / DIG OUT
50 +10 V OUT NC
53 A IN NO 02
54 A IN COM 01
55 COM A IN/OUT
12 +24 V OUT COM 04
18 DIGI IN
19 DIGI IN
27 DIGI IN
29 DIGI IN
20 COM D IN
and the armoured part must be connected to
ground on both cable ends; at the side of the
compressor and at the side of the frequency converter.
- Use an EMC cable gland for cable installation and
perfect grounding; The metallic terminal box of
the compressor has a paint-free surface around
1
03
RELAY
NC 06
NO 05
N RS-485 69
P RS-485 68
Com RS-485 61
the connection hole for better conductivity.
- A low pressure safety switch is mandatory
to avoid compressor vacuum operation.
- At start-up, verify that the compressor rotates
in the right direction and pumps.
Legends:
Ana: Analogue
Dig: Digital
in: Input
out: Output
COM: Common
NC: Normally-closed
NO: Normally-open
91,92,93 3 phases mains input x x
95 Earth x x
42,45 0/4-20 mA Analague Output or Digital Output - -
50 +10V DC Output - 53 0-10V or 4-20mA Analague Input x 54 0-10V or 4-20mA Analague Input - x
55 Com Analague In/Out x 12 +24V output - 18 External On/O(NO) x x
19 Digital Input - 27 Safety Device x x
29 Digital Input - 20 Com Digital Input - 98 To Compressor T3 x x
97 To Compressor T2 x x
96 To Compressor T1 x x
99 Earth x x
03,02,01 Relay 1 - 06,05,04 Relay 2 - -
69,68 RS485 Bus - -
61 RS485 Bus Com - -
-: Optional connection
X: Mandatory connection
2 | © Danfoss | DCS (CC) | 2017.07
Open loop Process loop
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
8510286P01B - FRCC.PI.039.A3.02
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