Quantech QTC4 STYLE A Series User Manual

QUANTECH
16
SECTION 2 - PRODUCT DESCRIPTION
FORM QTC4-NM1
ISSUE DATE: 4/2/2018
Oil separators utilize no moving parts. Oil cooling is
accomplished by refrigerant leaving the eductor flash-
ing in the suction line which cools the oil, motor and
compressor.
An integral liquid cooled, transistorized, PWM,
Variable Speed Drive (VSD) is controlled by the chiller
microprocessor control panel to start/stop, select com-
pressors to run, and select compressor speed. Displace-
ment Power Factor is 0. 95 at part or full load.
The chiller microprocessor communicates with the
VSD Logic Board via a 3-wire RS-485 opto coupled
data link. The VSD Logic Board runs the number of
compressors required to meet the load and the com-
pressors to the speed requested by the chiller micro-
processor.
The basic system control and VSD system architecture
is shown in Figure 2 on Page 16.
FIGURE 2 - CHILLER CONTROL SYSTEM
LD15028
INPUTS
Pressure Transducers
Temperature Sensors
Switches
Liquid Flow
High Pressure
Start/Stop
Level
Customer Supplied
Contacts
CONTROL
PANEL
Chiller Control
Board)
Microprocessor
User Interface
Display and
Keypad
DISPLAY
KEYPAD
MOTOR
OUTPUTS
Relay Output Board)
Solenoids
Contactors
Alarm
Pump
Compressor Heater
Run Status
Evaporator Heater
VSD
VSD Logic Board
SCR Trigger Board
Power Components
PWM (Speed Control)
COMMUNICATIONS
Building Automation
Printer Modem
LD15158
3 Phase Power Line
AC/DC Rectier
Power Driver
IGBT Gate Driver
VSD Logic Board
Inverter
PWM Signal
Signal From Main Control Panel
Rectier
Compressor 1
Compressor 2
Rectier Controller
SCR Trigger Board
(IGBT)

Quantech QTC4 STYLE A Series Specifications

General

Brand	Quantech
Model	QTC4 STYLE A Series
Category	Chiller
Language	English