Bitzer
4NES-20Y
Semi-hermetic Compressor • R134a
Quick Stats
Capacity
61,100 BTU/h
Power
17,908 W (~24.01 HP)
Refrigerant
R134a
Type
Semi-hermetic
Application
AC/Chiller
Technical Specifications
Performance
| Cooling Capacity | 61,100 BTU/h |
| Cooling Capacity (W) | 17,908 W |
| Displacement | 38.3 cc |
| Application | AC/Chiller |
Electrical
| Voltage | 380-420V/3/50Hz |
| Phase | 3-Phase |
| RLA (Running Load Amps) | 16.5 A |
| LRA (Locked Rotor Amps) | 99 A |
Physical
| Weight | 75 kg |
| Oil Charge | 2500 cc |
| Oil Type | BSE32 |
Refrigerant
| Primary Refrigerant | R134a |
| Compressor Type | Semi-hermetic |
Oil Compatibility & Lubrication
Oil Specifications
| Required Oil Type | POE |
| Full Name | Polyol Ester (POE) |
| Viscosity Grades | ISO VG 32, 46, 68, 100 |
| Recommended | ISO VG 32-68 |
| Factory Charge | 2500 cc |
Compatible Oil Brands
- Emkarate RL32-3MAF
- Mobil EAL Arctic 46
- Copeland 3GS
Important Warnings for R134a
- • PAG oil used in automotive systems only
- • POE oil for stationary HVAC/R
- • Higher viscosity for centrifugal chillers
Oil Return: Good miscibility across wide temperature range
General Oil Guidelines
!
Never mix MO (Mineral) and POE oils - causes chemical breakdown
💧
POE absorbs moisture - keep container sealed, minimize air exposure
✓
Check oil level through sight glass after 24 hours of operation
Installation Guidelines
1
Ensure the system is properly evacuated before charging with R134a refrigerant.
2
Use BSE32 oil only. Oil charge: 2500 cc.
3
Breaker size recommendation: 21 A minimum (based on RLA × 1.25).
4
Wire size should be rated for 16.5 A continuous load at 380-420V/3/50Hz.
Recommended Accessories
Start Capacitor
For high starting torque applications
Run Capacitor
Improves efficiency and power factor
Overload Protector
Thermal protection for motor
Start Relay
PTC or current relay for motor starting
Manufacturer Information
Brand: Bitzer
Country: Germany