York YD Series - Page 80

JOHNSON CONTROLS
80
FORM 160.69-O1
ISSUE DATE: 9/30/2012
SECTION 2 – OPTIVIEW CONTROL CENTER
Chiller Pulldown in Effect (LED)
This LED is only present in software version
C.OPT.11.02B.xxx (and earlier). It illuminates while
the Chiller Pulldown Period is in effect(from chiller
start until the Leaving Chilled Liquid Temperature is
within 2 ºF of the Leaving Chilled Liquid Temperature
setpoint). During this period, the rate of change of the
leaving Chilled Liquid Temperature is monitored to de-
termine if it is necessary to bring the Lag compressor
on line to meet the load requirement. With software
version C.OPT.11.02B.xxx (and earlier), the Chiller
Pulldown Demand Limit setpoint is active during this
period. With software version C.OPT.11.03.01.004
(and later), this LED is not present but the logic to de-
termine if it is necessary to bring on the lag compressor
(to meet load) still exists (the lag compressor will not
be brought online if the Lead Compressor Pulldown
Demand Limit Setpoint is used).
Motor 1
Motor Run (LED)
Illuminated when compressor #1 motor is being com-
manded to run. Otherwise, extinguished.
% Full Load Amps
Displays the motor current of compressor #1 motor as
a percentage of the full load amps of that motor.
Motor Current Limit Setpoint
Displays the current limit being applied to compressor
#1 motor.
If both compressor motors are running:
• (Software version C.OPT.11.02B. xxx (and earlier))
• If the Chiller Pulldown Demand Limit is in effect,
it is the Pulldown Demand Limit value.
• If the Chiller Pulldown Demand Limit is not in
effect, it is the active Chiller Current Limit value.
• (Software version C.OPT.11.03.01.004 and later)
• It is the active Chiller Current Limit value.
If only compressor motor #1 is running:
• (Software version C.OPT.11.02B. xxx (and earlier))
• If the Chiller Pulldown Demand Limit is in effect,
it is twice the Chiller Pulldown Demand Limit, up
to 100%.
• If the Chiller Pulldown Demand Limit is not in
effect, it is twice the Chiller Current Limit, up to
100%.
• (Software version C.OPT.11.03.01.04 and later)
• If the Lead Compressor Pulldown Time Setpoint
is in effect, it is the Lead Compressor Pulldown
Demand Limit Setpoint value.
• If the Lead Compressor Pulldown Time Setpoint
is not in effect, it is twice the Chiller Current Lim-
it, up to 100%.
Operating Hours
Displays the total accumulated run time of compressor
#1.
Number of Starts
Displays the total accumulated number of starts of
compressor #1.
Run Time
Displays the amount of time in days, hours and min-
utes that compressor #1 motor has been running since
the last start signal was received. Value is reset to zero
when compressor #1 enters Coastdown. It remains at
zero while shutdown.
Motor 2
Motor Run (LED)
Illuminated when compressor #2 motor is being com-
manded to run. Otherwise, extinguished.
% Full Load Amps
Displays the motor current of compressor #2 motor as
a percentage of the full load amps of that motor.
Motor Current Limit Setpoint
Displays the current limit being applied to compressor
#2 motor.
If both compressor motors are running:
• (Software version C.OPT.11.02B. xxx (and earlier))
• If the Chiller Pulldown Demand Limit is in effect,
it is the Pulldown Demand Limit value.
• If the Chiller Pulldown Demand Limit is not in
effect, it is the active Chiller Current Limit value.
(Software version C.OPT.11.03.01.004 and later)