Specifications

Multiplex Company, Inc.
Component Parts Workbook
25
00218011 Revision B (KAK) 31 July, 2000
Evaporator pressure of international refrigeration units
R-12 R-502 R-22 R-134A R-404A
bar bar bar bar bar
24°C Evaporator, or 27°C Water 5.2 9.7 9.0 5.2 10.3
10-100% Ice on Evaporator 0.6-1.4 2.1-3.4 1.7-3.0 0.4-1.2 2.3-3.8
Head pressure of international refrigeration units
R-12 R-502 R-22 R-134A R-404A
bar bar bar bar bar
24°C Condenser Ambient
10-100% Ice on Evaporator 6.9-9.7 13.8-17.9 12.4-16.5 7.6-11.0 14.5-19.3
32°C Condenser Ambient
10-100% Ice on Evaporator 8.3-11.7 15.9-20.6 14.5-19.3 8.9-12.4 16.5-22.1
Normal Operating Pressures of International
RefrigerationUnits
S04095
1. On system with expansion valve (pressure limiting) evaporator gets no higher than
3.4 bars on R-12
3.7 bars on R-502
5.9 bars on R-22
2. Water system head pressure should be manually set (adjustable water control valve) to maintain
41°C water condenser out temperature.
3. Remote Condenser system head pressure will be controlled by Low Ambient Control
5.2 bars on R-12, R-134A
10.3 bars on R-502, R-22, R-404A