Maximum Allowable Pressures Ps; Maximum Operating Pressures; Shut-Off Valves - Emerson Copeland 4MTL-05 Application Manuallines

Figure 18: Position of the pressure relief valve – Models 4MTL-35 to 4MTL-50

3.2.2 Maximum allowable pressures PS

The maximum allowable pressures PS according to EN 12693 are shown on the compressor
nameplate; they are obligatory and must not be exceeded.
▪ For transcritical applications: High-pressure side (HP): 135 bar
▪ For subcritical applications:
All pressures are expressed in bar(a) (absolute pressure).

3.2.3 Maximum operating pressures

The maximum operating pressures according to the envelopes shown in Chapter 2.4.2 "Application
limits" have to be respected during compressor operation. Running a compressor outside the
envelope could lead to compressor breakdown and/or system failure.
The position of the HP and LP connections is shown in Appendix 1 "Stream compressor
connections". It is recommended to connect the pressure cut-out devices directly to the compressor
housing. For the high-pressure cut-out switch, one of the connection ports "4" can be used – see
Appendix 1 "Connections of Stream CO2 compressors". For the low-pressure cut-out connection,
port "6" is recommended; it is located on the right-hand side of the compressor, ie, the side where
the electrical box is installed, above the oil level.
NOTE: The compressor operating range may be restricted for various reasons. Check the
application range
www.climate.emerson.com/en-gb.
3.3

Shut-off valves

Stream CO compressors are factory-equipped with shut-off valves on both the suction and
2
discharge sides. The shut-off valves are suitable for welding and brazing.
Displacement
Compressor
(m³/h)
4MTL-05 4.60
4MTL-07 6.20
4MTL-09 7.40
4MTL-12 9.54
4MTL-15 12.50
4MTL-30 17.90
4MTL-35 22.70
4MTL-40 26.80
4MTL-50 32.00
Table 6: Shut-off valves for transcritical compressors
14
Low-pressure side (LP): 90 bar
High-pressure side (HP): 135 bar
Low-pressure side (LP):
limitations in Copeland
Suction connection
Flange
mountings
Inner Drawing
(mm)
diameter number
5/8"
510-0823-00
45 x 45 5/8"
5/8"
7/8"
510-0844-00
52 x 52 7/8"
7/8"
⅜
1 "
70 x 70
⅜
510-0847-00
&
1 "
⅜
52 x 52
1 "
90 bar
brand products Select
Discharge connection
Inner
Description
diameter
W22 / ODS 5/8
1/2"
W22 / ODS 5/8 510-0809-00
1/2"
W22 / ODS 5/8
1/2"
W30 / ODS 7/8
5/8"
W30 / ODS 7/8 510-0842-00
5/8"
W30 / ODS 7/8
5/8"
W42.4 / ODS 1 ⅜ ⅛
1 "
⅛
W42.4 / ODS 1 ⅜ 510-0845-00
1 "
⅛
W42.4 / ODS 1 ⅜
1 "
AGL_Stream_ST_4MTL_4MSL_E_Rev01
software at
Drawing
Description
number
W17.2 / ODS 1/2
W17.2 / ODS 1/2
W17.2 / ODS 1/2
W22 / ODS 5/8
W22 / ODS 5/8
W22 / ODS 5/8
⅛
W35 / ODS 1
⅛
W35 / ODS 1
⅛
W35 / ODS 1