York Millennium YCAS 316, Installation Operation & Maintenance, Page: 81 / 144

FORM 201.10-NM1
81
YORK INTERNATIONAL
SWITCH 3
OPEN:
“LOCAL” mode allows an ISN or an RCC (Remote Control
Center) option panel to receive chiller data from the chiller
through the RS-485 port, but not change programmable
setpoint values remotely.
CLOSED:
“REMOTE” mode allows an ISN or an RCC (Remote
Control Center) option panel to receive chiller data from
the chiller through the RS-485 port. This mode will also
allow loading, unloading, shutdown, Leaving Water
Setpoint Reset, Current Limit Setpoint, and Lag Start
Setpoint from an ISN or RCC. If communications is lost
to the ISN or RCC, the micro will run the chiller on the
micro panel programmed values.
SWITCH 4
OPEN:
This switch is presently disabled. In the future, it will allow
selection of control from either thermal expansion valves
or electronic expansion valves.
CLOSED:
This switch is presently disabled. In the future, it will allow
selection of control from either thermal expansion valves
or electronic expansion valves.
SWITCH 5
OPEN:
Display messages will show units of measure in English
units (°F, PSI, etc.).
CLOSED:
Display messages will show units of measure in Scientific
International (Metric) units (°C, BAR, etc.)
SWITCH 6
OPEN:
This mode MUST be selected for chillers with Across-
the-line starters where only one contactor per compressor
is present in the power panel.
CLOSED:
This MUST be selected for chillers with Wye-Delta
starters where three contactors and wire wound power
resistors are present for each compressor in the power
panel.
L O C A L C O N T R O L
M O D E
E N G L I S H U N I T S
R E A D O U T
R E M O T E C O N T R O L
M O D E
S I U N I T S
R E A D O U T
T H E R M A L E X P A N S I O N
V A L V E S
A C R O S S - T H E - L I N E
M O T O R S T A R T I N G
T H E R M A L E X P A N S I O N
V A L V E S
W Y E D E L T A
M O T O R S T A R T I N G