background image

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 

Installation and servicing of the compressor by qualified 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

 Never operate 

c o m p r e s s o r 

without terminal 

box cover in place 

and secured. 

 Under all circumstances, 

the EN378 (or other applicable 

local safety regulation) 

requirements must be fulfilled. 

Wear protective goggles and 

work gloves.

The compressor must 

be handled with 

caution in the vertical 

position (maximum 

offset 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, 

fittings, etc... unless all pressure 

has been relieved from the 

compressor.

A

B

C

D

E

F

G

H

Operating limits

Quick connect spade terminals 

push

push

push

Electrical connections

All the above limits, temperatures and speeds, are secured by parameters in the drive and application controller softwares.

VLZ028 - VLZ044 compressors can be 

powered by the dedicated variable speed 

drive CDS803.

When Danfoss drive is selected, check carefully 

for compatibility between compressor model 

and variable speed drive.

Compressor 

model

Variable speed drive 

rated power output

VLZ028-035-044

7.5 kW

Evaporating Temperature ºC

VLZ R448/449A Operating Map

Condition:135ºC  Max DLT

Condensing 

Temperature ºC

-35

0

10

20

30

40

50

60

70

50-100rps

RGT20
SH10K

30-100rps

-30

-25

-20

-15

-10

-5

0

5

10

15

Evaporating Temperature ºC

VLZ R404A Operating Map

Condition:135ºC  Max DLT

Condensing 

Temperature ºC

-35

0

10

20

30

40

50

60

70

50-100rps

RGT20
SH10K

30-100rps

-30

-25

-20

-15

-10

-5

0

5

10

15

Instructions

VLZ028-VLZ044 

inverter compressors 

1 | © Danfoss | DCS (CC)| 2017.07

8510286P01B - FRCC.PI.039.A3.02 

Summary of Contents for VZL028

Page 1: ... under nitrogen gas pressure between 0 3 and 0 4 bar 4 and 6 psi Do not disassemble bolts plugs fittings etc unless all pressure has been relieved from the compressor A B C D E F G H Operating limits Quick connect spade terminals push push push Electrical connections All the above limits temperatures and speeds are secured by parameters in the drive and application controller softwares VLZ028 VLZ0...

Page 2: ...O 05 12 24 V OUT COM 04 18 DIGI IN 19 DIGI IN 27 DIGI IN 29 DIGI IN 20 COM D IN N RS 485 69 P RS 485 68 Com RS 485 61 RELAY 2 CDS803 Legends Ana Analogue Dig Digital in Input out Output COM Common NC Normally closed NO Normally open Open loop Process loop 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 In...

Page 3: ... located in the frequency converter package For further details refer to the appli cation guidelines Mounting The base frame of the frequency converter must be very well fixed to the sup port to ensure a very good continuity between the ground potential of all electrical panels and electrical boxes of the system Wiring All control wires have to be of a screeened design The cable for electrical mo ...

Page 4: ...s coil cleanliness fan opera tions water flow water filter etc liquid refrig erant flow and pressure drops solenoid valve filter dryer expansion valve etc refrigerant charge Low refrigerant charge The correct refrigerant charge is given by the liquid sight glass indica tion the condenser delta T in relation to the refrigerant pressure tables pressure tempera ture the superheat and the sub cooling ...

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