Data Sheet
Industrial Refrigeration Evaporator Control Panels Type PXE 02 and PXE 04
Distributed control logic panels designed specifically for industrial refrigeration evaporator control applications
The Danfoss evaporator control panel PXE 02 and PXE 04 are distributed control logic panels designed specifically for industrial refrigeration evaporator control applications. The PXE 02 can control up to 2 separate evaporators and their corresponding valve stations while the PXE 04 can control up to 4 evaporators and their corresponding valve stations. There is 200+ control application options for each evaporator that cover most industrial refrigeration evaporator control requirements. Each evaporator application is configured separately and may be either duplicated or take completely different configurations to the other connected evaporators.
Application-specific, energy-efficient control algorithms in each panel, achieve optimal space-cooling and defrost sequences for safe, efficient, trouble-free evaporator operation. Furthermore, all IIAR1 safety recommendations for hot gas defrost are complied with. Please note that evaporator power components such as motor starter protection, drives and contactors are not components contained within the PXE 02 or PXE 04.
Each evaporator application is setup and configured on your laptop via a free downloadable user-friendly graphical interface or via the panel’s display navigation hardware.
AI384930480499en-000101
Industrial Refrigeration Evaporator Control Panels, type PXE 02 & PXE 04
Features
•Designed ready-to-mount-and-connect supply power, sensors, solenoid, and actuator wiring needed for all standard industrial refrigeration evaporator control applications
•High quality standardized panel electrical components
•Rigorously tested control sequences and algorithms
•Well laid-out IP64/65 panels with condensation protection, 360° EMC screen contact glands
•Easy cable penetration with cable tie rail
•Standardized documentation
© Danfoss | Climate Solutions | 2021.08 |
AI384930480499en-000101 | 2 |
Industrial Refrigeration Evaporator Control Panels, type PXE 02 & PXE 04
Applications
Application principles: General
The Danfoss evaporator control panels have many different application choices available that are designed for Industrial Refrigeration applications. It is possible to assign different control applications to each of the evaporators, if required. Some of the control possibilities offered are as follows:
•Flooded ammonia/CO2 /HCFC/HFC.
•Direct expansion (DX) ammonia/CO2/HCFC/HFC.
•Superheat Control by:
◦Fixed Superheat reference
◦Load defined reference
◦Minimum Stable Superheat
•Modulating or simple ON/OFF room temperature control
•Media temperature control of suction line valve with motorized valve
•Media temperature control of suction line valve with servo valve
•Pressure control of suction line valve with motorized valve
•Pressure control of suction line valve with servo valve
•Modulating room temperature control by modulating the valve in the liquid line of ‡ooded systems
•Supports Multiple Defrost methods:
◦by pressure
◦by liquid drain
◦by water or brine
◦individual defrost schedules by single weekdays, Saturdays and Sundays
•Defrost starts:
◦via Modbus or DI start by time interval (time since last defrost start)
◦according to accumulated cooling time
◦via defrost schedules and Real Time Clock
◦forced manual defrost via the HMI or Modbus
•Defrost stops:
◦on time duration
◦on temperature
•Separate Drip tray Hot Gas control separate from main Hot Gas valve
•Emergency cooling - failsafe operation
•Safe startup procedure after power failure
•Additional product temperature alarm option
© Danfoss | Climate Solutions | 2021.08 |
AI384930480499en-000101 | 3 |
Industrial Refrigeration Evaporator Control Panels, type PXE 02 & PXE 04
Application principles PXE 04: 4 x Evaporator Control
Examples of quick panel setup for evaporator control applications:
Application example 1:
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
| <![if ! IE]> <![endif]>NC |
|
|
|
|
|
|
|
|
|
| <![if ! IE]> <![endif]>NO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
|
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>M |
<![if ! IE]> <![endif]>1AO |
|
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
|
<![if ! IE]> <![endif]>2DO |
|
|
|
|
<![if ! IE]> <![endif]>2DO |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
<![if ! IE]> <![endif]>Wet return line |
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
<![if ! IE]> <![endif]>Hot gas defrost line |
|
<![if ! IE]> <![endif]>Wet return line |
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
<![if ! IE]> <![endif]>Hot gas defrost line |
|
|
1 |
|
|
|
|
2 |
|
|
|
|
3 |
|
|
|
|
4 |
|
|
|
<![if ! IE]> <![endif]>Wet return line |
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
<![if ! IE]> <![endif]>Hot gas defrost line |
|
<![if ! IE]> <![endif]>Suction line |
|
|
<![if ! IE]> <![endif]>Liquid line |
|
|
|
|
<![if ! IE]> <![endif]>NC |
<![if ! IE]> <![endif]>NO |
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>2DO |
|
<![if ! IE]> <![endif]>1DO |
|
<![if ! IE]> <![endif]>PC |
<![if ! IE]> <![endif]>1DO |
|
|
|
|
<![if ! IE]> <![endif]>NC |
<![if ! IE]> <![endif]>NC |
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
<![if ! IE]> <![endif]>PC |
|
|
|
|
|
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
| <![if ! IE]> <![endif]>NO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
|
<![if ! IE]> <![endif]>1DO |
|
|
|
|
|
| <![if ! IE]> <![endif]>NC |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
|
|
Evaporator 1: Flooded evaporator with hot gas defrost by liquid drain.
Evaporator 2: Flooded evaporator with hot gas defrost by liquid drain and with wet suction modulating control. Evaporator 3: Flooded evaporator with hot gas defrost by pressure.
Evaporator 4: DX with PWM liquid line control
© Danfoss | Climate Solutions | 2021.08 |
AI384930480499en-000101 | 4 |
Industrial Refrigeration Evaporator Control Panels, type PXE 02 & PXE 04
Application example 2:
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
| <![if ! IE]> <![endif]>NC |
|
|
|
|
|
|
|
|
|
|
| <![if ! IE]> <![endif]>NO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
|
|
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>NC NC |
<![if ! IE]> <![endif]>2DO |
<![if ! IE]> <![endif]>NC |
|
<![if ! IE]> <![endif]>or water defrost |
<![if ! IE]> <![endif]>1DO |
|
|
|
|
|
<![if ! IE]> <![endif]>NO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
|
||||
|
<![if ! IE]> <![endif]>line |
<![if ! IE]> <![endif]>line |
<![if ! IE]> <![endif]>line |
<![if ! IE]> <![endif]>line |
|
|
<![if ! IE]> <![endif]>Electric |
|
|
|
|
<![if ! IE]> <![endif]>Wet return |
<![if ! IE]> <![endif]>Defrost drain |
<![if ! IE]> <![endif]>Liquid feed |
<![if ! IE]> <![endif]>Hot gas defrost |
|
<![if ! IE]> <![endif]>Wet return line |
|
|
<![if ! IE]> <![endif]>Liquid feed line |
|
|
|
1 |
|
|
|
|
2 |
|
|
|
|
|
3 |
|
|
|
|
4 |
|
|
|
|
<![if ! IE]> <![endif]>Wet return line |
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
<![if ! IE]> <![endif]>Hot gas defrost line |
|
<![if ! IE]> <![endif]>Wet return line |
|
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
<![if ! IE]> <![endif]>Hot gas defrost line |
|
|
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
|
|
|
<![if ! IE]> <![endif]>2DO |
|
|
|
|
<![if ! IE]> <![endif]>2DO |
|
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
<![if ! IE]> <![endif]>PC |
|
|
|
|
|
<![if ! IE]> <![endif]>PC |
|
|
|
|
|
|
|
|
| <![if ! IE]> <![endif]>NO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>R |
<![if ! IE]> <![endif]>NC NO |
<![if ! IE]> <![endif]>1DO |
|
<![if ! IE]> <![endif]>1DO |
|
<![if ! IE]> <![endif]>1DO |
| <![if ! IE]> <![endif]>NC |
|
|
|
|
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
<![if ! IE]> <![endif]>1AI |
|
<![if ! IE]> <![endif]>1AI |
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
|
|
|
Evaporator 1: Flooded evaporator with hot gas defrost by liquid drain.
Evaporator 2: Flooded evaporator with PWM liquid line control and electrical or water defrost.
Evaporator 3 & 4: Flooded evaporator with hot gas defrost by pressure. Extra product temperature sensors. Gas detection.
© Danfoss | Climate Solutions | 2021.08 |
AI384930480499en-000101 | 5 |
Industrial Refrigeration Evaporator Control Panels, type PXE 02 & PXE 04
Application principles PXE 02: 2 x Evaporator Control
Examples of quick panel setup for evaporator control applications:
Application example 1:
|
|
<![if ! IE]> <![endif]>1AI |
|
|
| <![if ! IE]> <![endif]>M |
<![if ! IE]> <![endif]>1AO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
|
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
|
<![if ! IE]> <![endif]>2DO |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
<![if ! IE]> <![endif]>Wet return line |
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
<![if ! IE]> <![endif]>Hot gas defrost line |
|
|
|
|
1 |
|
|
|
|
2 |
|
<![if ! IE]> <![endif]>Wet return line |
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
<![if ! IE]> <![endif]>Hot gas defrost line |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
|
|
<![if ! IE]> <![endif]>2DO |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
<![if ! IE]> <![endif]>PC |
|
|
| <![if ! IE]> <![endif]>NO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
|
| <![if ! IE]> <![endif]>NC |
|
|
|
|
|
|
<![if ! IE]> <![endif]>R |
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
Evaporator 1: Flooded evaporator with hot gas defrost by liquid drain. Motorized valve control on the wet return line.
Evaporator 2: Flooded evaporator with hot gas defrost by pressure. Extra product temperature
© Danfoss | Climate Solutions | 2021.08 |
AI384930480499en-000101 | 6 |
Industrial Refrigeration Evaporator Control Panels, type PXE 02 & PXE 04
Application example 2:
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
| <![if ! IE]> <![endif]>NC |
|
|
|
|
|
| <![if ! IE]> <![endif]>NO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>NC |
<![if ! IE]> <![endif]>1DO |
|
|
<![if ! IE]> <![endif]>PC |
|
|
<![if ! IE]> <![endif]>2DO |
|
|
|
|
<![if ! IE]> <![endif]>NC |
|
|
<![if ! IE]> <![endif]>Wet return line |
<![if ! IE]> <![endif]>Defrost drain line |
<![if ! IE]> <![endif]>Liquid feed line |
|
<![if ! IE]> <![endif]>Hot gas defrost line |
1 |
|
|
|
|
|
2 |
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>Suction line |
|
<![if ! IE]> <![endif]>Liquid line |
|
|
<![if ! IE]> <![endif]>NO |
|
|
|
|
|
|
<![if ! IE]> <![endif]>1DO |
<![if ! IE]> <![endif]>PC |
|
<![if ! IE]> <![endif]>1DO |
|
<![if ! IE]> <![endif]>NC |
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
|
|
|
|
<![if ! IE]> <![endif]>1AI |
|
|
Evaporator 1: Flooded evaporator with PWM liquid line control and hot gas defrost with pressure. Separate drip tray line control.
Evaporator 2: DX with PWM liquid line control.
© Danfoss | Climate Solutions | 2021.08 |
AI384930480499en-000101 | 7 |
Industrial Refrigeration Evaporator Control Panels, type PXE 02 & PXE 04
Product speci€cation
Technical data and dimensions
Table 1: Technical data and dimensions
Standards: |
IEC61439 -2 |
- |
|
Class of protection: |
IP65/66 (depending on variant is with display) Indoor |
- |
|
|
usage only |
|
|
Short circuit current rating: |
15 |
kA |
|
Ue Supply voltage: |
1x230+N+PE |
VAC |
|
Ue Control voltage: |
230/24DC |
V |
|
Frequency: |
50 |
Hz |
|
System earth: |
TN-S |
- |
|
Internal separation: |
Form 1 |
- |
|
|
|
|
|
Dimensions (Height x Width x Depth): |
PXE 02: 800x600x210 |
mm |
|
PXE 04: 800x800x210 |
|||
|
|
||
|
|
|
|
Panel color: |
RAL 7035 |
- |
|
EMC Environment: |
B |
- |
|
Pollution degree |
3 |
- |
|
Temperature range ambient |
-20 °C to +40 °C |
|
|
Temperature range transport/storage |
|
|
|
|
|
|
|
Weight range (depending on variant) |
PXE 02: 30-35 |
kg |
|
PXE 04: 35-40 |
|||
|
|
||
|
|
|
|
Wire identification by color codes |
IEC 61439 |
|
|
|
|||
Wire numbering |
DS/EN 60204 according to connected terminal |
|
|
|
|
|
© Danfoss | Climate Solutions | 2021.08 |
AI384930480499en-000101 | 8 |
Loading...