York YZ - Water Circuits; Flow Rate and VPF

JOHNSON CONTROLS
18
FORM 161.01-PW2
ISSUE DATE: 7/18/2018
SECTION 2 - ENERGY MANAGEMENT SYSTEMS
6. When the Current Limit control Source is set to
BAS, 0-10, 4-20 or PWM, the BAS can control
the maximum allowable compressor motor AMPS
from 30 to 100%, through the Remote Current
Limit Setpoint. Refer to Figure 14 on page 13,
Figure 15 on page 13, and Figure 16 on page
13.
7. The Johnson Controls METASYS
™
System may
be interfaced with the chiller OptiView
™
Control
Center to provide unied chiller plant system con-
trol. The METASYS
™
System directly communi-
cates with the OptiView
™
Control Center via the
SC-EQ communication card which is installed in
the Control Center. All temperatures, pressures,
safety alarms and cycling information known to
the OptiView™ Control Center are then available
to the METASYS
™
System for integrated chiller
plant control, data logging, and local, remote op-
erator displays. The SC-EQ also allows the BAS
to start, stop, and reset the chiller’s leaving chilled
water setpoint and the current limit setpoint by
using the BACnet MS/TP protocol. The SC-EQ
also supports other BAS systems using BACnet
MS/TP, Modbus RTU or N2 communication pro-
tocols.