Figure 4 - Basic System Control And Vsd System Architecture - York YVWA Installation Operation & Maintenance

SECTION 2 - PRODUCT DESCRIPTION
Pressure Transducers
Temperature Sensors
Switches
Liquid Flow
High Pressure
Start/Stop
Level
Customer Supplied
Contacts
COMMUNICATIONS
Building Automation
Printer Modem
3 Phase Power Line
Rectifier
Signal From Main Control Panel

FIGURE 4 - BASIC SYSTEM CONTROL AND VSD SYSTEM ARCHITECTURE

18
INPUTS
DISPLAY
AC/DC Rectifier
Rectifier Controller
SCR Trigger Board
VSD Logic Board
CONTROL
PANEL
(Chiller Control
Board)
Microprocessor
User Interface
Display and
Keypad
KEYPAD
Power Driver
(IGBT)
IGBT Gate Driver
PWM Signal
FORM 201.30-ICOM1 (519)
ISSUE DATE: 05/22/2019
OUTPUTS
(Relay Output Board)
Solenoids
Alarm
Pump
Compressor Heater
Run Status
VSD
VSD Logic Board
SCR Trigger Board
Power Components
PWM (Speed Control)
MOTOR
LD15028
Compressor 1
Compressor 2
Inverter
LD15158
JOHNSON CONTROLS