Emerson 20/20 service manual Table of Contents

Table of Contents

Section Title	Section Number
How To Use This Manual	TOC-8
Section 1 • Operational Flow Charts
Requirements to Start Compressor	1-1
Critical Compressor Run Logic at Compressor Start	1-1
Compressor Amperage Load Limiting	1-1
Figure 1-1. Operational Flow Charts	1-1
High Discharge Pressure Load Limiting	1-1
Suction Pressure Override Load Limit During Temperature Control	1-2
Section 2 • Installation Recommendations
Proper Wiring Sizing	2-1
Voltage Source	2-1
Figure 2-1. Vission 20/20 with Individual Transformer	2-1
Figure 2-2. EMI and Vission 20/20	2-1
Grounding	2-2
Mixing Voltages	2-2
DC signals	2-2
Figure 2-3. Ground Wiring	2-2
Figure 2-4. Mixed Voltage Wiring	2-2
Wiring Methods	2-3
Figure 2-5. Correct Transformer Wiring Method	2-3
Figure 2-6. Incorrect Transformer Wiring Method	2-3
Best Practices	2-4
Section 3 • Hardware Architecture
Overview	3-1
Figure 3-1. Hardware Architecture Overview	3-1
Digital Input/Output (I/O)	3-2
Table 3-1. Digital I/O	3-3
Analog Inputs	3-4
Table 3-2. Analog Inputs	3-5
Analog Outputs	3-6
Digital & Analog I/O Boards Layout	3-6
Table 3-3. Analog Outputs	3-7
Figure 3-2. Digital I/O Board Layout	3-7
Digital Outpout Boards	3-8
Figure 3-3. Digital Output Board Layout	3-8
Digital Input Boards	3-9
Figure 3-4. Digital Input Board Layout	3-9
Digital In-Out Boards	3-10
Figure 3-5. Digital Input-Output Board Layout	3-10
Analog Input Boards	3-11
Figure 3-6. Analog Input Board Layout	3-11
Analog Input Jumper Tables	3-12
Table 3-4. Analog Input Jumper Tables	3-12
Analog Output Boards	3-14
Figure 3-6. Analog Output Board Layout	3-14

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 TOC - 1