This document discusses technological innovations in refrigeration compressors for new HFO refrigerants. It summarizes BITZER Italia's CSH and CSW compact screw compressor ranges, which have been qualified for use with HFO refrigerants such as R1234yf and R1234ze(E). The document outlines the compressor models and performance levels with these refrigerants, showing they can provide cooling capacity and efficiency similar to R134a. It also discusses application limits, lubricant selection, safety considerations, and the lower discharge temperatures that can be achieved with HFO refrigerants compared to R134a due to their lower isentropic exponents.

1. Technological innovations in refrigeration and air conditioning
CENTRO STUDI GALILEO
Milan, 17.03.2016
COMPRESSORS AND APPLICATIONS
FOR HFO
Piero Trevisan // BITZER Italia Srl

2. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 2
Compact screw compressors for HFO
 Compact screw compressor range
 Common product feature
 Application range with new refrigerants
 Performance level
 Lubricants
 Safe operation
Summary

3. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 3
Compact screw compressors for HFO
HFO -READY

4. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 4
CSH Compact Screw Compressors for HFO
CSH/CSW Series
HFO ReadyCSH95113-320Y
 Extensive qualification program completed
 Released for HFO’s and HFO/HFC blends
 HFO’s implementation in BITZER software
 35 different models (HFO – READY)
 Displacement: 137m³/h -1120m³/h @50Hz
 CSH series optimized for high SDT
 CSW series optimized for low SDT
 Infinite or 4-Step capacity control: 25%-100%
 Highest energy efficiency in its class
 Lowest sound levels in its class
HFO -READY

5. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 5
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSW series with R1234yf (like with R134a)
 Refrigeration oil: BSE170L (like with R134a)
15
20
25
30
35
40
45
50
55
60
-20 -15 -10 -5 0 5 10 15
Condensingtemperature[°C]
Evaporating temperature [°C]
CSW / R1234yf
CSW
CR ≤ 75%
Δtoh = 10 K

6. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 6
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSW series with R1234yf (like with R134a)
 Refrigeration oil: BSE170L (like with R134a)
15
20
25
30
35
40
45
50
55
60
-20 -15 -10 -5 0 5 10 15
Condensingtemperature[°C]
Evaporating temperature [°C]
CSW / R1234yf
CSW
CR ≤ 75%
Δtoh = 10 K
BSE170L

7. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 7
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSW series with R1234ze(E) (like with R134a)
 Refrigeration oil: BSE170L (like with R134a)
15
20
25
30
35
40
45
50
55
60
-20 -15 -10 -5 0 5 10 15
Condensingtemperature[°C]
Evaporating temperature [°C]
CSW / R1234ze(E)
CSW
CR ≤ 75%
Δtoh = 10 K

8. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 8
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSW series with R1234ze(E) (like with R134a)
 Refrigeration oil: BSE170L (like with R134a)
15
20
25
30
35
40
45
50
55
60
-20 -15 -10 -5 0 5 10 15
Condensingtemperature[°C]
Evaporating temperature [°C]
CSW / R1234ze(E)
CSW
CR ≤ 75%
Δtoh = 10 K
BSE170L

9. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 9
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSH series with R1234yf (like with R134a)
 Refrigeration oil: BSE170 (like with R134a)
15
20
25
30
35
40
45
50
55
60
65
70
75
-25 -20 -15 -10 -5 0 5 10 15 20 25 30
Condensingtemperature[°C]
Evaporating temperature [°C]
CSH / R1234yf
CSH / Motor 1
CSH / Motor 2
CR ≤ 75%

10. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 10
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSH series with R1234yf (like with R134a)
 Refrigeration oil: BSE170 (like with R134a)
15
20
25
30
35
40
45
50
55
60
65
70
75
-25 -20 -15 -10 -5 0 5 10 15 20 25 30
Condensingtemperature[°C]
Evaporating temperature [°C]
CSH / R1234yf
CSH / Motor 1
CSH / Motor 2
CR ≤ 75%
BSE170

11. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 11
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSH series with R1234ze(E) (only Motor 2)
 Refrigeration oil: BSE170 (like with R134)
15
20
25
30
35
40
45
50
55
60
65
70
75
-20 -15 -10 -5 0 5 10 15 20 25 30
Condensingtemperature[°C]
Evaporating temperature [°C]
CSH / R1234ze(E)
CSH / Motor 1
CR ≤ 75%
Δtoh = 10 K
2

12. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 12
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Application limits of CSH series with R1234ze(E) (only Motor 2)
 Refrigeration oil: BSE170 (like with R134)
15
20
25
30
35
40
45
50
55
60
65
70
75
-20 -15 -10 -5 0 5 10 15 20 25 30
Condensingtemperature[°C]
Evaporating temperature [°C]
CSH / R1234ze(E)
CSH / Motor 1
CR ≤ 75%
Δtoh = 10 K
2
BSE170

13. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 13
CSH for HFO application limits

14. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 14
Performance level of compact screw compressors
with R1234yf and R1234ze(E)
/ R1234yf for medium-temperature refrigeration and air-conditioning
/ R1234ze(E) for medium-temperature refrigeration, air-conditioning and
high-temperature heat pumps
0
5
10
15
20
25
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Vapourpressure[bar]
Temperature [°C]
R1234yf
R1234ze(E)
R134a

15. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 15
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ CSH and CSW series
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
105%
Qo Pe COP/EER
CSW9593-210Y (3°C / 45°C / 10 K)
R134a
R1234yf
R1234ze

16. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 16
Performance level of compact screw compressors
with R1234yf and R1234ze(E)
R1234yf
Cooling capacity and efficiency (full and part load) very similar to R134a
R1234ze(E)
Efficiency very similar to R134a
Cooling capacity about 25% less than with R134a
R1234yf slightly better in case of low condensing temperature
R1234ze(E) slightly better in case of high condensing temperature
Both refrigerants match very well with screw compressors!

17. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 17
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ R134a has a higher isentropic exponent than HFO refrigerants
 At to = 5°C; tc = 45°C; Δtoh = 5 K is (DGT – tc) = 15 K

18. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 18
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ R1234ze(E) has a lower isentropic exponent than R134a
 At to = 5°C; tc = 45°C; Δtoh = 5 K is (DGT – tc) = 10 K

19. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 19
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ R1234yf has the lowest isentropic exponent
 At to = 5°C; tc = 45°C; Δtoh = 5 K is (DGT – tc) = 7 K

20. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 20
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ R1234yf has the lowest isentropic exponent
 At to = 5°C; tc = 25°C; Δtoh = 10 K is (DGT – tc) = 14 K

21. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 21
APPLICATIONS ON PURE HFO REFRIGERANTS:
SCREW COMPRESSORS
/ Difference between discharge gas temperature and condensing
temperature
to/tc Δtoh (K) R134a R1234ze(E) R1234yf
5°C/25°C 5 K (DGT – tc) = 14 K (DGT – tc) = 11 K (DGT – tc) = 9 K
10 K (DGT – tc) = 19 K (DGT – tc) = 16 K (DGT – tc) = 14 K
5°C/35°C 5 K (DGT – tc) = 14 K (DGT – tc) = 10 K (DGT – tc) = 7 K
10 K (DGT – tc) = 19 K (DGT – tc) = 15 K (DGT – tc) = 12 K
5°C/45°C 5 K (DGT – tc) = 15 K (DGT – tc) = 10 K (DGT – tc) = 7 K
10 K (DGT – tc) = 20 K (DGT – tc) = 15 K (DGT – tc) = 12 K

22. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 22
Lubricant choice
CHEMICAL STABILITY OF REFRIGERANT AND OIL
/ No long-term experience with HFO refrigerants
/ Water content increases oil acidity (POE). Oil acidity test to be done as
good engineering practice.
Compact screw CSH Standard Oil BSE170
Compact screw CSW Standard Oil BSE170L
OIL SELECTION

23. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 23
Safety & Flammability
TO ASSEMBLE A SAFE SYSTEM WITH HFO REFRIGERANTS
CSH/CSW screw compressors
are approved for HFO
+
Individual risk assessment considering
current standards and regulations
Safety risks
Flammability
Formation of hydrofluoric acid

24. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 24
SAFE SYSTEMS WITH HFO REFRIGERANTS
/ Differences between R1234yf and R1234ze(E)
 Higher requirements for transport and storage for R1234yf
according to safety data sheet
 R1234yf is flammable and special requirements apply (e.g.
special driving license), while R1234ze(E) is non-flammable
 Higher requirements for design and production of pipework and
heat exchangers for R1234yf in the PED 2014/68/EU
 R1234yf is classified in fluid group 1 (dangerous substances),
while R1234ze(E) is in fluid group 2 (all other substances)
IMPORTANT BACKGROUND INFORMATION
R1234yf R1234ze(E)

25. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 25
SAFE SYSTEMS WITH HFO REFRIGERANTS
/ For all refrigeration systems, R1234ze(E) is flammable
(R1234yf is also flammable)
 Industrial standards (e.g. prEN 378-1:2013) are applied
 Test temperature of the flammability test (60°C) is higher than
the one considered for the safety data sheet (20°C) and
PED 2014/68/EU
/ It is highly recommended to do an individual risk assessment of
the system with help of certified bodies and experts
IMPORTANT BACKGROUND INFORMATION

26. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 26
SAFE SYSTEMS WITH HFO REFRIGERANTS
/ The followings ones are examples of industrial standards,
international and local regulations for the system manufacturer
 Machinery directive: 2006/42/EC
 Safety requirements for refrigeration systems: e.g. EN 378
 Workplace safety regulations
 Product safety regulations: e.g. PED 2014/68/EU
 Operational safety and accident prevention
 ATEX directives: e.g. 2014/34/EU and 1999/92/EC
 Internal regulations from end user
/ Further standards and regulations might apply
THE RISK ASSESSMENT FOR THE SYSTEM

27. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 27
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL

28. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 28
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control Cabinet © Rittal
Motor protection device power supply
Fault relay
Oil heater
Oil supply monitoring
HP switch
Head fan
SU
CRII
CIC
Oil level regulator
Long & extensive wiring
• System controller
• Time-delay relays
• Fittings
• Terminal strips
• Alarm indicators
DGT sensor (PTC)
Motor PTC
sensor
Today’s Situation

29. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 29
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Module power supply
Fault relay
Control signal 0..10 V
Motor contactor control signal
Modbus
Compressor start signal
CM-RC-01
Control Cabinet © Rittal
Oil heater
Oil supply monitoring
HP switch
Head fan
SU
CRII
CIC
DGT sensor (PT1000)
Motor PTC
sensor
• System
controller
Future Situation

30. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 30
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Installation and
life-cycle costs
Value for the
customer

31. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 31
SYSTEM SIMPLIFICATION
DATALOG & COMMUNICATION
CONTROL
/ Compressor Start (DOL, PW, Y/Δ)
/ Oil heater
/ Head fan
/ SU,CRII and CIC
/ Oil level regulator
/ Less components
/ Less design time
/ Quick diagnosis
/ Easier installation and operation
/ Motor temperature
/ Discharge gas temperature
/ Oil supply (OLC-D1 and DP-1)
/ High Pressure (Compressor Safety)
/ Application Limits
/ Compressor operation statistics
/ BEST software (Wireless
communication)
/ Modbus
/ LED indicators
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
MONITORING & DIAGNOSIS

32. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 32
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
/ Compressor start
 Direct-On-Line: control signal for motor contactor
 PW and Y/Δ: control signal for motor contactors and
cut-in time-delay relays included
/ Oil heater
 Activation during compressor standstill
 Deactivation during compressor operation
/ Head fan
 Activation at DGT > 120°C (248°F)
 Activation at CR0% operation
(required for motor cooling)
Figure: Siemens
R134a

33. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 33
/ Start Unloading (SU)
 Either with dedicated SU cylinder head or
with the available CRII cylinder heads
/ Capacity Regulation (CRII)
 Only a 0 - 10 V control signal
from the system controller is required
 Higher system efficiency with smooth control
/ Controlled Injection Cooling (CIC)
 Improved for stable and
efficient operation at CR ≥ 50%
/ Oil level regulator
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
SU CRII

34. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 34
/ CRII System
 Developed for a high-switching frequency
 Capacity Regulation range: 0% .. 100%
 Accurate control with 0 – 10 V control signal from the
system controller
 Pre-programmed control logic
 Stable control of the operating conditions
 Immediate reaction to load changes
 Higher system efficiency
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control

35. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 35
/ Capacity Regulation (CRII) / Application example
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
0%
50%
2 min
2,5 V
4 V
0,8 bar
0,6 bar
Discharge Pressure
Capacity step [%]
Suction Pressure
Control signal [V]
Stable reaction
Stable control

36. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 36
/ Capacity Regulation (CRII) / Application example
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
2 min
2,5 V
5 V
1,2 bar
0,9 bar
Discharge Pressure
Capacity step [%]
Suction Pressure
Control signal [V]
0%
50%
Stable reaction
Unstable control

37. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 37
/ Capacity Regulation (CRII) / Application example
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
50%
100%
2 min
7,5 V
8,7 V
1,0 bar
0,7 bar
Discharge Pressure
Capacity step [%]
Suction Pressure
Control signal [V]
Stable reaction
Unstable control

38. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 38
/ Capacity Regulation (CRII) / Application example
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
50%
100%
2 min
5,5 V
8,5 V
0,6 bar
0,5 bar
Discharge Pressure
Capacity step [%]
Suction Pressure
Control signal [V]
Stable reaction
High system load change

39. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 39
/ CIC System
 Reduced compressor
thermal load under
extreme operating
conditions
 Stable control
 Efficient system
operation
 CR ≥ 50%
automatically kept if
CIC is in operation
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
t [s]po
[bar]
CIC
impulse
t [s]
Set point
DGT
[°C]
t [s]
Set point

40. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 40
/ Controlled Injection Cooling (CIC) / Application example
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control
50%
100%
2 min
DGTmin
DGTmax
ON
OFF
0,1 bar
0,2 bar
CIC
Discharge Gas Temperature
Discharge Pressure
Capacity step [%]
Suction Pressure
Stable control
Stable and efficient operation

41. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 41
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
System Simplification
/ Less components in the switchboard
 Reduced external wiring, number of terminal strips and fittings
 No time-delay relays for compressor start and power supplies for
compressor components are required
/ Less design time
/ Quick diagnosis
 Operating conditions, compressor status and alarms are saved
 Easy maintenance and trouble-shooting through BEST software
/ Easier installation and operation
 Reduced system assembly and commissioning time
 Better and more reliable service for the end customer

42. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 42
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Datalog & Communication
/ Compressor operation statistics
 Operating hours; number of starts; operating conditions;
compressor load statistics; critical, warning and fault alarms
/ BEST software (FREE)
 Live monitoring of operating conditions and download of
compressor datalog for analysis
 More comfortable service with wireless communication between
module and notebook
/ Modbus
 More value for the customer with communication between
module and system controller
/ LED indicators

43. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 43
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Datalog & Communication
/ Compressor operation statistics and live monitoring of operating
conditions / BEST software

44. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 44
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Monitoring & Diagnosis
/ Motor temperature (PTC sensor)
 Detection of motor overload due to e.g. phase loss, phase
unbalance and high current consumption
/ Discharge gas temperature (PT1000 sensor)
/ Oil supply
 OLC-D1 for CE4S and DP-1 for CE4, BE5, BE6 and CE8
/ High-pressure (for compressor safety)
 AUTO reset for CE4 and CE4S (HP limiter)
 MANUAL reset for BE5, BE6 and CE8 (HP cut-out)
/ Application Limits
 Suction and discharge pressure transducers as option

45. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 45
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Monitoring & Diagnosis
/ High-pressure (Requirements of EN 378-2)
Refrigerant
charge
Compressor
displacement
Required protection against
excessive pressure
Remarks
< 10 kg - HP limiter with auto reset
(Type Examination)
OK for CE4 with
< 10 kg refrigerant
> 10 kg and
< 100 kg
< 25 l/s
(90 m3/h)
CE4
HP limiter with auto reset
(Type Examination)
OK for CE4
> 100 kg < 25 l/s
(90 m3/h)
CE4
HP cut-out with manual reset
(Type Examination)
HP safety cut-out with manual
reset (Type Examination)
CE4 parallel
compound with
> 100 kg refrig. is
unlikely
- > 25 l/s
(90 m3/h)
BE5, BE6, CE8
HP cut-out with manual reset
(Type Examination)
OK for BE5, BE6
and CE8
Reset
button

46. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 46
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Monitoring & Diagnosis
/ Application Limits
tc(SDT)
to (SST)
2 K
2 K
2 K
Fault limit: direct shut-down
Critical limit: shut-down after 30 s
Warning limit
Official application limit

47. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 47
Power supply to the module,
including all sensors and
components (115 Vac / 230 Vac)
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Control signal for capacity
regulation (0 - 10 V)
Control start signal for
motor contactors
(DOL, PW or Y/Δ)
Compressor
start signal
Modbus (RTU)
communication
Wireless Communication
or BEST converter
Power & Control Connections
Fault relay

48. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 48
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Availability

49. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 49
CM-RC-01 MODULE
EXTENT OF DELIVERY
Crankcase heater
2x CRII solenoid coils
(optional 3x)
HP limiter-AUTO reset (CE4)
HP cut-out-MANUAL reset (others)
PTC motor temperature
monitoring
OLC-D1 or DP-1
PT1000 discharge gas
temperature monitoring

50. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 50
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
Extent of delivery

51. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 51
Article Numbers CE4 BE5 BE6 CE8
Standard 34705101 34705103 34705105
Advanced CRII 34705102 34705104 34705106
CM-RC-01 MODULE
ON-BOARD COMPRESSOR CONTROL
+ =
Portfolio

52. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 52
Today
Compressor + External FIVARISPEED (since 2008)
ABB
Vacon
Schneider Siemens
Danfoss Power Electronics
(Yaskawa)
Others…
Leroy Somer
0
1,000
2,000
3,000
ECOSTAR VARISPEED

53. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 53
Short-term target and project partners
Introduction of external BITZER frequency inverters
for reciprocating compressors (380 – 480 V)

54. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 17th March 2016 // Page 54
Tomorrow
Compressor + External FIVARISPEED (since 2008)
ABB
Vacon
Schneider
Siemens
Danfoss
Power El.
(Yaskawa)
Others…
Leroy
Somer
VARIPACK
Still in the
main
focus where
possible