Compressor Requirements; Design Pressures - Carlyle TS Series Application Manual

6.1 Compressor Requirements

The compressor is designed to meet the UL and
ASHRAE safety code for refrigeration compressors. The
manufacturing facilities for the compressor conduct pres-
sure burst tests in accordance with ASHRAE-15, UL
safety codes and the Pressure Equipment 97/23/CEE
directive.
PRESSURE TYPE
Hydrostatic Burst
Test Pressure (BURST)
Proof Test Pressure (TP)
Maximum Operating
Pressure (MOP)
Leak Test Pressure
(AP)
UL60335-2-34 Design
Pressure (DP)
LEGEND
LT — Low Temperature Refrigeration
36
Table 17 — Compressor Design Pressures
APPLICATION
R-134a Water-Cooled 950 psig (6.6 MPa)
R-134a Air-Cooled 1470 psig (10.1 MPa)
R-404A LT Ref 1770 psig (12.2 MPa)
R-134a Water-Cooled
R-134a Air-Cooled
R-404A LT Ref
R-134a Water-Cooled 190 psig (1.3 MPa)
R-134a Air-Cooled 294 psig (2.0 MPa)
R-404A LT Ref 354 psig (2.4 MPa)
R-134a Water-Cooled
R-134a Air-Cooled
R-404A LT Ref
R-134a Water-Cooled 190 psig (1.3 MPa)
R-134a Air-Cooled 294 psig (2.0 MPa)
R-404A LT Ref 354 psig (2.4 MPa)

6.2 Design Pressures

Pressure Relief Valve
The internal relief valve is designed to open when the
pressure differential between suction and discharge pres-
sure is greater than 27.6 bar (400 psid) for R-134a and
greater than 30 bar (435 psid) for R-404A. The valve will
close and seal again after the pressure difference falls
below the set value.
Hydrostatic Design Pressures
The design pressures for the compressor castings are
listed in Table 17.
DISCHARGE ECONOMIZER
540 psig (3.7 MPa)
610 psig (4.2 MPa)
1040 psig (7.2 MPa)
465 psig (3.2 MPa)
108 psig (0.7 MPa)
122 psig (0.8 MPa)
116 psig (0.8 MPa)
310 psig (2.1 MPa)
108 psig (0.7 MPa)
122 psig (0.8 MPa)
116 psig (0.8 MPa)
NOTE: All pressures listed are gage pressures. Add 14.7 psi (0.1 MPa)
to obtain absolute pressure, if necessary.
SUCTION
440 psig (3.0 MPa)
440 psig (3.0 MPa)
870 psig (6.0 MPa)
61 psig (0.4 MPa)
51 psig (0.4 MPa)
38 psig (0.3 MPa)
88 psig (0.6 MPa)
88 psig (0.6 MPa)
176 psig (1.2 MPa)