York YCIV Series, Установка, эксплуатация и обслуживание

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JOHNSON CONTROLS
261
SECTION 8 - MICROPANEL
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
8
Low Ambient Cutout
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
LOW AMBIENT TEMP CUTOUT = XXX.X °F
The low ambient temp cutout allows programming the
outdoor temperature at which it is desired to shut down
the chiller to utilize other methods of cooling.
The cutout is programmable between –2.0°F (-18.9°C)
and 50°F (10.0°C) with a 25°F (-3.9°C) default.
Low Leaving Liquid Temp Cutout
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
LEAVING LIQUID TEMP CUTOUT = XXX.X °F
The leaving chilled liquid temp cutout is programmed
to avoid freezing the evaporator due to excessively low
chilled liquid temperatures. The cutout is automatically
set at 36°F (2.2°C) in the Water Cooling mode and is
programmable in the Glycol Cooling mode. In the Gly-
col Cooling Mode, the cutout is programmable from
11.0°F to 36.0°F (-11.7°C to 2.2°C) with a default of
36.0°F (2.2°C).
Motor Current Limit
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
MOTOR CURRENT LIMIT = XXX % FLA
The motor current limit %FLA is programmable. This
allows the microprocessor to limit a system before it
faults on high current. Typically, the limit point is set at
100%. The unload point is programmable from 30% to
100% with a default of 100%.
Pulldown Current Limit
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
PULLDOWN CURRENT LIMIT = XXX % FLA
The pulldown current limit %FLA is programmable.
This allows the microprocessor to limit a system on
pulldown limiting for the purpose of peak time energy
savings. Typically, the limit point is set at 100%. The
pulldown limit point is programmable from 30% to
100% with a default of 100%. Be aware when using
pulldown motor current limit, the chiller may not be
able to load to satisfy temperature demand
Pulldown Current Limit Time
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
PULLDOWN CURRENT LIMIT TIME = XXX MIN
The pulldown current limit time is programmable.
This allows the microprocessor to limit a system on
pulldown limiting for a defined period of time for the
purpose of peak time energy savings. The pulldown
limit point is programmable from 0 to 255 with a de-
fault of 0 Min.
Suction Superheat Setpoint
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
SUCTION SUPERHEAT SETPOINT = XXX.X °F
The suction superheat setpoint is programmable from
8.0°F to 12.0°F (4.4°C to 8.3°C) with a 10.0°F (5.6°C)
default. Typically the superheat control will be pro-
grammed for 10.0°F. Higher superheats between 10
and 12°F will reduce the risk of liquid carry over and
are preferred by some users.
Unit ID Number
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
REMOTE UNIT ID NUMBER = X
For purposes of remote communications, multiple
chillers may be connected to an RS-485 communica-
tions bus. To allow communications to each chiller, a
chiller ID number may be programmed into memory.
On a single chiller application, the value will be “0”.