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
15AB237986441643en-US0701
Connection details
Suction and discharge
connections
Oil drain connection
Oil equalisation connection
Oil sight glass
Schrader
The oil drain connection allows oil to be removed
from the sump for changing, testing, etc. The
tting contains an extension tube into the oil
sump to more eectively remove the oil. The
connection is a female 1/4" are tting.
Note: on SY240 to 380, it is not possible to drain
oil from the suction connection.
SM/SZ 112-124-147: 1"3/4 rotolock connector
allowing use of 1"3/4-7/8" or 1"3/4-1"1/8
SY 240-300-380: 1/2" are
Other models: 3/8" are
This connection must be used to mount an oil
equalisation line when two or more compressors
are mounted in parallel (please refer to
Danfoss Parallel Application Guide lines reference
FRCC.PC.005 for details).
The oil ll connection and gauge port is a 1/4"
male are connector incorporating a schrader
valve.
All Danfoss SM / SY / SZ scroll compressors come
equipped with a sight glass (1"1/8-18 UNEF)
which may be used to determine the amount and
condition of the oil contained within the sump.
Model
SM/SZ084-090-100-110-
120-148-161
SM/SZ 175 - SM/SZ/SY185
SM 112-124 -
SM/SZ 147
SY 240 - 300 SY 380
Version V R-Y C-P-X AL MA - MB AA - AB AA - AB
Suction and discharge connection brazed rotolock brazed brazed rotolock brazed brazed
Oil sight glass threaded threaded threaded threaded threaded threaded threaded
Oil equalisation connection 3/8" are 3/8" are 3/8" are rotolock 1"3/4 1/2" are 1/2" are 1/2" are
Oil drain connection - 1/4" are 1/4" are - 1/4" are 1/4" are 1/4" are
Low pressure gauge port (schrader) 1/4" are 1/4" are 1/4" are 1/4" are 1/4" are 1/4" are 1/4" are
Brazed version Rotolock version
Brazed Rotolock Sleeve included
SM/SZ 084-090-100
Suction 1" 1/8 - -
Discharge 3/4" - -
SM/SZ 110-112-120-
124-147-SM148&161
Suction 1" 3/8 - -
Discharge 7/8" - -
SM/SZ 175-185
Suction 1" 5/8 2" 1/4 1" 3/8
Discharge 1" 1/8 1" 3/4 7/8"
SY 240-300
Suction 1" 5/8 2" 1/4 1" 5/8
Discharge 1" 1/8 1" 3/4 1" 1/8
SY 380
Suction 2" 1/8 - -
Discharge 1" 3/8 - -
1
2
2
1
Dimensions