York J Series Manual page 54

Parameter Descriptions and Options
Space Sensor Enable
If this option is turned ON, it means that a Space (tem-
perature) Sensor is installed and is used by appropriate
control algorithms except when:
• Conditions are specified that override Space Sensor
use, or
• The Space Sensor fails.
• If the Space Sensor fails, the control will use the
RAT sensor as a backup if available.
If the sensor is not connected, or fails, a fault will
be set. The fault can be turned off by turning off
this option. If the option is OFF, the control will
only operate the unit from the Thermostat inputs, a
Network Communicated Sensor or stand alone.
Use of the Space Sensor is not self-configuring. The
Space Sensor is only used when enable is ON.
Unocc Override Time
The value programmed here will determine how long
the unit will operate in the Unoccupied Override mode
after the Unoccupied Override button is pressed on the
Space Sensor.
Space Setpt Offset
The Space Temperature Setpoint Offset is the +/- value
the control will use to offset the Space Temperature
Setpoint when the slidebar on some versions of the
Space Sensor products is used. For example, if the
Space Temperature Setpoint Offset value is set to 3°F,
shifting the slidebar all the way in minus direction will
decrease the Space Temperature Setpoint by 3°F and
shifting it all the way in plus direction will increase the
Space Setpoint by 3°F.
Fan ON With Sensor
When this option is turned ON, the Supply Fan will
continue running when the Space Sensor based tem-
perature control is satisfied and control is in the Oc-
cupied Mode.
RAT Sensor Enable
If this option is turned ON, it means that the RAT sensor
will be used by appropriate control algorithms. If the
sensor is not connected, or fails, a fault will be set. The
fault can be turned off by turning off this option.
Space Temp Alrm Diff
This parameter and the Space Temperature Alarm Time
parameter below are used to generate a fault in case the
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space temperature deviates from the current space tem-
perature setpoint by more than the Space Temperature
Alarm Differential and continues moving away from
this setpoint for longer than the time entered for the
Space Temperature Alarm Time parameter. These two
parameters are used together and should be specified
(enabled) together.
This space temperature monitoring process is used only
in CV units and when:
• The space temperature is monitored by a Space
Sensor or a Network Communicated Sensor, and
• The value of Space Temperature Alarm Differ-
ential parameter is greater than zero, and
• The value of the Space Temperature Alarm Time
is greater than zero.
When the Differential parameter value is greater than
zero, the control will:
• Trend the space temperature anytime the space
temperature is above the setpoint by the fault tem-
perature differential or greater. The control must
have been operating in a cooling mode for at least
10 minutes before trending begins.
• Determine if the offset is increasing.
• Declare a fault if the differential temperature con-
tinuously increases for the Space Temperature
Alarm Time.
Space Temp Alarm Time
When this option has a value other than zero pro-
grammed, it will load a timer with this value as soon
as the Space Temperature Alarm Differential function
starts trending. Each time the trend is positive (Space
temperature is moving toward the Setpoint), the timer
is set to zero.
SensConsist Enable
The "SensConsist Enable" parameter when set to ON
will permit operation of Sensor Consistency Tests 1
& 2.
SAT Control For Cool
When enabled, this tells the control it is to do excessive
SAT monitoring and tripping for cooling.
SAT Control For Heat
When enabled, this setting tells the control it is to do
excessive SAT monitoring and tripping for heating.
FORM 100.50-NOM7 (808)
JOHNSON CONTROLS