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Danfoss
Air Compressor
R134a
Danfoss R134a User Manual
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Dimensions
SM/SZ 1
85 P
, X, Y versi
on
HM 8 b
olt
Lock w
as
he
r
Flat was
he
r
Steel m
ounting s
leeve
Ru
bb
er grom
me
t
Nu
t
28 mm
Compressor
base plate
Grommet
All dimensions in mm
Brazed version
Rotolock v
ersion
Ø 256
Ø 266
615
153
SANS COMPRESSION: 29.5
/ W
ithout compression
A
VEC COMPRESSION: 28.0
/ W
ith compression
78
650
Ø 317
81
345.4
184
428
178
192
304.8
371
156
279.4
187
83
215
187
5
28.5±1.2
90°
35°
30°
90°
4 holes
Ø 19.43
Ø 266
Ø 256
649
614
187
215
153
77
Ø 317
345.4
195
428
171
279.4
185
192
304.8
371
178
81
83
153
528.5±1.2
SANS COMPRESSION: 29.5
/ Without compression
AVEC C
OMPRESSION: 28.0
/ With compression
4 holes
Ø 19.43
90°
35°
30°
90°
13
AB237986441643en-010801
Application Guidelines
12
14
Table of Contents
Table of Contents
3
Compressor Model Designation
4
Nomenclature
4
Danfoss Scroll Compression Principle
5
Features
6
Technical Specifications
7
50 Hz Data
7
60 Hz Data
8
Dimensions
9
Sm/Sz 084-090-100-110-120
9
Sm 112-124-Sm/Sz147
10
SM/SZ 147 Code 3
10
Sm/Sz 148-161
11
SM/SZ 175-185 & SY185 R and C Version
12
SM/SZ 185 P, X, y Version
13
Connection Details
15
Electrical Data, Connections and Wiring
16
Motor Voltage
16
Wiring Connections
16
IP Rating
17
Terminal Box Temperature
17
Three Phase Electrical Characteristics
18
Danfoss MCI Soft-Start Controller
19
General Wiring Information
20
Motor Protection
22
Voltage Unbalance
23
Approval and Certifications
24
Approvals and Certificates
24
Pressure Equipment Directive 2014/68/EU
24
Low Voltage Directive
24
Machines Directives
24
Internal Free Volume
24
Operating Conditions
25
Refrigerant and Lubricants
25
Motor Supply
26
Compressor Ambient Temperature
26
Application Envelope at Dew Temperatures
26
Application Envelopes at Mean Temperatures
29
Discharge Temperature Protection
31
Maximum Operating Pressure (MOP) Protection
31
High and Low Pressure Protection
31
Cycle Rate Limit
32
System Design Recommendations
33
General
33
Essential Piping Design Considerations
33
Refrigerant Charge Limit
34
Off-Cycle Migration
34
Liquid Flood Back
36
Low Ambient Application
37
Low Load Operations
38
Brazed Plate Heat Exchangers
38
Electronic Expansion Valve
38
Reversible Heat Pump Systems
38
Water Utilizing Systems
39
Sound and Vibration Management
40
Starting Sound Level
40
Running Sound Level
40
Stopping Sound Level
40
Sound Generation in a Refrigeration or Air Conditioning System
40
Installation
42
Compressor Handling and Storage
42
Compressor Mounting
42
Compressor Holding Charge
43
System Cleanliness
43
Tubing
43
Brazing and Soldering
43
System Pressure Test
44
Leak Detection
45
Vacuum Evacuation and Moisture Removal
45
Filter Driers
45
Refrigerant Charging
45
Insulation Resistance and Dielectric Strength
46
Commissioning
46
Oil Level Checking and Top-Up
46
Ordering Information & Packaging
47
Packaging
47
Ordering Information
47
Accessories
52
4
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Danfoss R134a Specifications
General
Brand
Danfoss
Model
R134a
Category
Air Compressor
Language
English
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