York J Series - Configuration Key Parameters

JOHNSON CONTROLS
58
FORM 100.50-NOM7 (808)
Parameter Descriptions and Options
Purge Schedule
This is the programmable time of day to start Purge
for each day.
Purge OAT High Limit
This programmable temperature is the upper limit for
Purge using 100% outdoor air.
Purge OAT Low Limit
This programmable temperature is the lower limit for
Purge using 100% outdoor air.
Smoke Purge Mode
The smoke purge setting enables/disables the Smoke
Purge function and tells the control what Smoke Purge
control sequence to follow. The setting range is 0 – 5. A
“0” setting tells the control to ignore the Smoke Purge
input and do nothing (Smoke Purge disabled). A setting
of 1 – 5 tells the control which one of ve smoke purge
control sequences to follow when the Smoke Purge
input is active. Smoke Purge conguration options are
detailed in the section on Sequence Operation.
Internal Clk/Sched
This setting tells the control to use the Internal Time
Clock and Schedule built into the controller for all
scheduling functions. When this function is set to ON,
all Occupied/Unoccupied commands and Morning
Warm Up commands received over a Network (BAS)
will be ignored. Unoccupied Override commands via
Space Sensors and the hard wired Occupied/Unoccupied
input will take priority over the internal scheduling.
Weekly Schedule
The schedule for time programmed operation of the
unit is entered for all days of the week plus a holiday
schedule. One start and stop time is allowed.
Holiday Schedule
Holiday dates are entered into the Holiday Schedule for
use in time programmed operation. Up to 16 dates are
allowed. Dates are assumed to be for the current year.
CONFIGURATION KEY PARAMETERS
These setpoints are intended to be programmed
at the factory and should not be changed by eld
personnel.
Unit Type
This tells the control that it is controlling one of the
three selectable rooftop unit type options:
• Constant Volume
• Variable Air Volume
Dirty Filter Switch
This conguration setting tells the control that a Dirty
Filter Switch is installed and that the control is to
monitor the Dirty Filter Switch input and respond as
specied to the input status.
ASCD Override
This is not an option parameter but rather a one-time
command issued on the OptiLogic Control Center.
When this command is issued, the control will read all
compressor Anti Short Cycle Delays. If any of them are
loaded with more than 30 seconds, the control will load
30 seconds in them.
Number of Compressors
This conguration setting tells the control the number
of compressors available. There are two options, 4
compressors and 6 compressors. All Models J32, J33 &
J34 are set to four compressors. Refer to the "Compres-
sor Staging" section for details on how the unit stages
compressors.
Number of Heat Steps
This conguration setting tells the control the number
of heating steps (stages) available. This option will be
selectable from 0 to 6. Note, zero (0) must be selected
if hydronic heat is enabled.
Freezestat
This conguration setting tells the control that a hot
water freeze protection Freezestat is installed on the unit
and the control will monitor the hot water Freezestat
input. This option is used only on units with hydronic
heat (Hydronic Heat option is turned ON).
Reset Lead Lag
Setting Reset Lead Lag to ON tells the control to set the
accumulated compressor run times to zero. This causes
all compressors to be considered as if they have no run-
time history. This is a one time action. The control resets
the ON to OFF as soon as the runtimes are zeroed.