2
GENERAL
This publication contains operation and troubleshooting informa-
tion for PIC (Product Integrated Control) 6, a system for con-
trolling 23XRV variable speed screw liquid chillers.
The PIC6 control system monitors and controls all operations of
the chiller. The microprocessor control system matches the capac-
ity of the chiller to the cooling load while providing state-of-the-
art chiller protection. The system controls cooling load within the
set point plus or minus the dead band by sensing the water or brine
temperature and regulating VFD (variable frequency drive) speed
of the compressor.
See Fig. 1 for an example of the Login screen.
Fig. 1 — Login Screen
The PIC6 control system also provides access to a Quick Test
controls function covering all outputs except compressor relay
outputs.
Abbreviations Used in This Manual
The following abbreviations are used in this manual:
HARDWARE
The PIC6 control system consists of one SIOB (Starfire Input/
Output Board) module and two IOB modules. All boards commu-
nicate via an internal Local Equipment Network (LEN) bus.
Main PIC6 Control HMI
The main control board is supplied from a 24 VAC supply ref-
erence to earth ground. In the event of a power supply inter-
rupt, the unit restarts automatically without the need for an ex-
ternal command. However, any faults active when the supply is
interrupted are saved, and may in certain cases prevent a circuit
or unit from restarting. Figure 2 shows the main control inter-
face and connectors.
NOTES:
1. Either BACnet/MSTP or BACnet/IP can be enabled and either
Modbus/RTU or Modbus/TCP/IP can be enabled. Controller does
not allow both to be enabled at the same time.
2. Modbus RTU can be configured simultaneously with BACnet IP.
3. BACnet MS/TP can be configured simultaneously with Modbus
TCP/IP.
4. BACnet MS/TP must be disabled in order to use Modbus RTU and
visa versa.
Fig. 2 — PIC6 Connectors
SIOB (Starfire Input/Output Board)
The SIOB is an input output board which is supplied from a
24VAC supply reference to earth ground. This board controls the
EXV stepper motors.
AWG — American Wire Gauge
CCN — Carrier Comfort Network
®
CCN mode — Operating mode: CCN
DHCP — Dynamic Host Configuration Protocol
EC — Envelope Control (Hot Gas Bypass)
ECDW — Entering Condenser Water
ECW — Entering Chilled Water
EWT — Entering Water Temperature
EXV — Electronic Expansion Valve
HGBP — Hot Gas Bypass
HMI — Human Machine Interface
I/O — Input/Output
IOB — Input/Output Board
LCDW — Leaving Condenser Water
LCW — Leaving Chilled Water
LED — Light-Emitting Diode
LEN — Local Equipment Network
MCB — Main Control Board
NIC — Network Interface Card
PIC — Product Integrated Control
RLA — Rated Load Amps
RTD — Resistance Temperature Detector
SIOB — Starfire Input/Output Board
TFT — Thin Film Transistor
UI — User Interface
VFD — Variable Frequency Drive
CAUTION
Maintain the correct polarity when connecting the power
supply to the boards. Otherwise, the boards may be damaged.
LEGEND
J1 — USB CONNECTOR
J5 — USB CONNECTOR
J6 — LEN CONNECTOR
J7 — CCN CONNECTOR
J8 —
RS485, BACnet MS/TP OR Modbus RTU
(Phoenix 1757035 - not factory supplied)
J9 — RNET (future)
J10 — RS485, Modbus/RTU Comm to VFD Starter
J11 — USB CONNECTOR
J14 — POWER SUPPLY CONNECTOR (24 VAC)
J15 —
ETHERNET CONNECTOR, PORT 0 (DEFAULT
IP: 169.254.1.1, Mask: 255.255.0.0)
J16 — ETHERNET CONNECTOR, PORT 1 (DEFAULT
IP: 192.168.100.100, mask: 255.255.255.0)
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