Run Contacts; Warning Alarm Contacts; Remote Start And Stop Contacts From Energy Management System; Figure 4 - Run Contacts - York YZ Wiring Diagrams

FORM 161.01-PW2
ISSUE DATE: 7/18/2018

RUN CONTACTS

When closed, these contacts (see Figure 4 on
page 9) signify that the unit is operating. The
OptiView™ Control Center will display a System
Run Message.
I/O
Board
35 36
TB6
N.O. Contacts
(in Control Center) rated 5 AMPS
resistive @ 120 or 240 VAC

FIGURE 4 - RUN CONTACTS

WARNING ALARM CONTACTS

These contacts will close whenever one or more of
the WARNING conditions occur. Refer to all warning
conditions listed in YZ OptiView™ Operation (Form
161.01-M2). The contacts remain closed as long as the
warning condition is in effect. For most warnings, the
contacts automatically open when the condition is no
longer present. While for certain warnings, the contacts
will open only after the condition is no longer present
and the WARNING RESET key is pressed in Operator
(or higher) access level.
I/O
Board
55 56
TB4

FIGURE 5 - WARNING ALARM CONTACTS

JOHNSON CONTROLS
Field Wiring Term. Block
in OptiView Control Center
LD23507
N.O. Contacts
(in Control Center) rated
2 AMPS induction at 250 VAC,
5 AMPS resistive at 250 VAC
LD23508
SECTION 1 - FIELD CONTROL MODIFICATIONS
REMOTE START AND STOP CONTACTS
FROM ENERGY MANAGEMENT SYSTEM
When the OptiView™ Control Center is in the "Hard-
wire" remote operating mode with the Remote Start/
Stop contacts open (see Figure 6 on page 9), the
unit will start via a closure of the Remote Start/Stop
contacts. A subsequent opening of the Remote Start/
Stop contacts causes the chiller to shut down. The
Opti-View™ Control Center will display REMOTE
STOP because the Energy Management System Re-
mote Start/Stop contact has commanded the unit to
shutdown.
Maintained contacts must be used for START and
STOP.
Even when the chiller is applied with
Remote Start‑Stop and the Control Cen‑
ter is in "Remote Operating Mode",
a SAFETY STOP from the OptiView
Control Center, by an operator or others
can STOP the compressor and prevent
the chiller from restarting. However, the
operator cannot locally start the compres‑
sor using the LOCAL start keypad button,
when the control center is in the "remote"
operating mode.
I/O
Board
1
7
TB3
FIGURE 6 - REMOTE START / STOP CONTACTS
FROM ENERGY MANAGEMENT SYSTEM
Contact Rating
5mA @ 115 VAC
Open = Stop
Closed = Start
Field Wiring Term. Block
in OptiView Control Center
LD23509
9
1