User Guide
Table Of Contents
- Compressor model designation
- Danfoss scroll compression principle
- Features
- Technical specifications
- Dimensions
- Electrical data, connections and wiring
- Approval and certifications
- Operating conditions
- System design recommendations
- Specific application recommendations
- Sound and vibration management
- Installation
- Compressor handling and storage
- Compressor mounting
- Compressor holding charge
- System cleanliness
- Tubing
- Brazing and soldering
- System pressure test
- Leak detection
- Vacuum evacuation and moisture removal
- Filter driers
- Refrigerant charging
- Insulation resistance and dielectric strength
- Commissioning
- Oil level checking and top-up
- Ordering information & packaging
- Accessories
Application guidelines
21AB237986441643en-US0701
Compressor models SM / SZ 175 – 185 R and C version
Legends
Compressor models SY 240 - 300 - 380 & SM/SZ-185 (P, X, Y versions)
Fuses F1
Compressor contactor KM
Control relay KA
Safety lock out relay KS
Optional short cycle timer (3 min) 180 s
External overload protection F2
Pump-down pressure switch LP
High pressure safety switch HP
Control device TH
Liquid Line Solenoid valve LLSV
Discharge gas thermostat DGT
Fused disconnect Q1
Motor safety thermostat thM
Compressor motor M
Motor Protection Module MPM
Thermistor chain S
Safety pressure switch LPS
CONTROL CIRCUIT
F1
F1
KA KAKA
HP
LPS
T1
T2
T3
KM
DGT
KS
KS
1
2
M
ThM
KS
KS
KA
KM
KM
LLSV
180s
TH
F2
Q1
L1 L3 L2
A1
A2
A3
Wiring diagram with pump-down cycle
LP
CONTROL CIRCUIT
F1
F1
KA
KA
KA
HP
T1
T2
T3
KM
DGT
KS
KS
1
2
TH
KS
LPS
KA
KM
180s
F2
Q1
L1 L3 L2
M
ThM
A1
A2
A3
Wiring diagram without pump-down cycle
A1
A3
A2
MPM
S
LPS
Wiring diagram with pump-down cycle
LP
A1
A3
A2
MPM
S
KS
Wiring diagram without pump-down cycle
LPS
Electrical data, connections and wiring