York Millennium YCAS 310, Установка, эксплуатация и обслуживание

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FORM 201.10-NM3
77
YORK INTERNATIONAL
Remote Control Mode allows an ISN system or an RCC
(Remote Control Center – 60 Hz models only) panel to
receive chiller data from the chiller through the RS-485
port. This mode will also allow programming of load-
ing, unloading, shutdown, Leaving Water Setpoint Re-
set, Current Limit Setpoint, and Lag Start Setpoint from
an ISN or RCC. If communications are lost to the ISN
or RCC, the micro will run the chiller on the locally pro-
grammed values.
SWITCH 4: Expansion Valve Type
Both Positions:
This switch is presently disabled. In the future, it will
allow selection of control from either thermal expan-
sion valves or electronic expansion valves.
SWITCH 5: Units of Measurement
Open:
English Units Mode causes all information relating to
pressures, temperatures, etc., to be displayed in En-
glish (Imperial) units (°F, PSI, etc).
Closed:
S.I. Units Mode causes all information relating to pres-
sures, temperatures, etc., to be displayed in S.I. (Met-
ric) units (°C, BAR, etc.). For conversion purposes,
1BAR = 14.5 PSIG.
SWITCH 6: Compressor Motor Starting
Open:
Across-The-Line Mode MUST be used for chillers with
single contactor Across-the-Line (D.O.L.) starters on
each compressor.
point to be programmed from 38 to 70°F. Selecting this
mode also auto-programs the Low Chilled Liquid Cut-
Out at 36°F and the Suction Pressure Cut-Out at 44
PSIG and are not adjustable.
Closed:
Brine Cooling Mode is for brine / glycol applications
with setpoints below 40°F and allows the chilled liquid
leaving temperature setpoint to be programmed from
10 to 70°F. In this mode, the Low Chilled Liquid Cut-
Out can be programmed from 8 to 36°F and the Suc-
tion Pressure Cut-Out programmed from 20 to 70 PSIG.
SWITCH 2: Ambient Temp. Low Limit
Open:
Standard Ambient Mode fixes the Low Ambient Cut-
Out setting at 25°F (–3.9°C) and should normally be
selected if a Low Ambient Kit is NOT installed.
Closed:
Low Ambient Mode allows the Low Ambient Cut-Out to
be programmed from 0 to 50°F. Values above 25°F can
be used to automatically shut down the chiller when
direct cooling methods become operational.
SWITCH 3: Chiller Control
Open:
Local Control Mode allows an ISN system or an RCC
(Remote Control Center – 60 Hz models only) panel to
receive chiller data from the chiller through the RS-485
port but not change programmable setpoint values re-
motely.
Closed:
B R I N E
C O O L I N G
L O W A M B I E N T
C O N T R O L
S T A N D A R D
A M B I E N T
L O C A L C O N T R O L
M O D E
R E M O T E C O N T R O L
M O D E
T H E R M A L E X P A N S I O N
V A L V E S
E N G L I S H U N I T S
R E A D O U T
S I U N I T S
R E A D O U T
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