E2 User Manual.book - Emerson Climate Technologies

11.1.2.3 Floating Setpoint Control..................................................................................................................................... 11-1
11.1.3 The Enhanced Suction Group Application..................................................................................................... 11-1
11.1.3.1 Learning Mode..................................................................................................................................................... 11-2
11.1.3.2 Circuit Load Analysis .......................................................................................................................................... 11-2
11.1.3.3 The Control/Cycles Parameter............................................................................................................................. 11-2
11.1.3.4 Variable-Speed, Digital Scroll, and Digital Discus Compressor Support ........................................................... 11-2
11.1.3.5 Floating Suction Control...................................................................................................................................... 11-2
11.1.4 Hardware Overview ....................................................................................................................................... 11-2
11.2 CONDENSER CONTROL........................................................................................................................................... 11-3
11.2.1 Air Cooled Condensers .................................................................................................................................. 11-3
11.2.1.1 Air Cooled Strategy ............................................................................................................................................. 11-3
11.2.1.2 Temperature Differential Strategy ....................................................................................................................... 11-3
11.2.2 Evaporative Condensers ................................................................................................................................ 11-4
11.2.3 Fan Control.................................................................................................................................................... 11-4
11.2.4 Condenser Split Mode .................................................................................................................................... 11-4
11.2.5 Fast Recovery................................................................................................................................................. 11-4
11.2.6 Hardware Overview ....................................................................................................................................... 11-4
11.3 STANDARD CIRCUITS............................................................................................................................................. 11-5
11.3.1 Refrigeration Control..................................................................................................................................... 11-5
11.3.1.1 Temperature Monitor........................................................................................................................................... 11-6
11.3.1.2 Temperature Control............................................................................................................................................ 11-6
11.3.1.3 Line Up(ESR)/Defrost ......................................................................................................................................... 11-6
11.3.1.4 Line Up(MFESR)/Defrost ................................................................................................................................... 11-6
11.3.2 Defrost Control .............................................................................................................................................. 11-6
11.3.2.1 Defrost States....................................................................................................................................................... 11-6
11.3.2.2 Defrost Types....................................................................................................................................................... 11-6
11.3.2.3 Defrost Termination............................................................................................................................................. 11-7
11.3.2.4 Emergency Defrost .............................................................................................................................................. 11-7
11.3.2.5 Hot Gas Defrost with ESR8 and MultiFlex ESR................................................................................................. 11-7
11.3.3 Clean and Door Switches............................................................................................................................... 11-7
11.3.3.1 Clean Switches..................................................................................................................................................... 11-7
11.3.3.2 Door Switches...................................................................................................................................................... 11-7
11.3.4 Fan Control.................................................................................................................................................... 11-8
11.3.5 The TD3 Temperature
Display ........................................................................................................................................................................ 11-8
11.3.6 The Control Link CD Case Display ............................................................................................................... 11-8
11.3.7 Wiring............................................................................................................................................................. 11-8
11.4 CASE CONTROL CIRCUITS ................................................................................................................................... 11-10
11.4.1 Overview....................................................................................................................................................... 11-10
11.4.2 Case Circuit Control Software Overview..................................................................................................... 11-10
11.4.2.1 Valve Control..................................................................................................................................................... 11-11
11.4.3 Refrigeration Control................................................................................................................................... 11-11
11.4.3.1 EEVs (Liquid Pulse and Liquid Stepper)........................................................................................................... 11-11
11.4.3.2 EEPRs (Suction Stepper) ................................................................................................................................... 11-12
11.4.4 Defrost Control ........................................................................................................................................... 11-12
11.4.4.1 Defrost States..................................................................................................................................................... 11-12
11.4.4.2 Defrost Types..................................................................................................................................................... 11-12
11.4.4.3 Defrost Termination........................................................................................................................................... 11-13
11.4.4.4 Demand Defrost................................................................................................................................................. 11-13
11.4.4.5 Emergency Defrost ............................................................................................................................................ 11-13
11.4.4.6 The WAIT State................................................................................................................................................. 11-13
11.4.5 Anti-Sweat Control....................................................................................................................................... 11-13
11.4.5.1 Dewpoint Input Sources..................................................................................................................................... 11-14
11.4.6 Dual Temp Control....................................................................................................................................... 11-14
11.4.7 Fan Control.................................................................................................................................................. 11-14
11.4.8 Light Control................................................................................................................................................ 11-14
x • Table of Contents 026-1610 Rev 10 06-APR-2010