351579-YTS-B-0608
Johnson Controls Unitary Products
15
Once the Unoccupied Override mode is initiated, it will continue
until the programmed Unoccupied Override Time Limit is
reached. The Override mode can not be cancelled by, for
example, a change of state of the Occupied input to ON
(occupied) and then back to OFF (unoccupied).
This parameter is adjustable from 0 to 240 minutes. The default
is 60 minutes.
Fan Delays (ON) & (OFF) -
Any time the control starts a
compressor it will load the Fan On Delay for Cool with the
programmed value. Any time the control turns off all the
compressors it will load the Fan Off Delay for Cool with the
programmed value.
When the control turns on a gas heat stage, it will begin
monitoring the gas valve and load the Fan On Delay For Heat
with the programmed value when it senses gas valve voltage. If
modulating gas heat is installed, then Fan Off Delay in heating
must be set to Off.
When the thermostat terminates the call for W1 the control will
turn off H1 output and load the Fan Off Delay for Heat with the
programmed value.
After the control has turned on heat, it will start monitoring the
Gas Valve. If at any time the Gas Valve (24 VAC) is not present
for five minutes while H1 is on, the control will flag an Alarm.
Anytime GV1/H1 goes off during the fan on delay, the control
will force the fan on, for the fan off delay period. The control will
wait for GV1 to be on at least 15 seconds before forcing the fan
on. If GV1 has been on for at least 15 seconds, and then goes
away before the Fan On Delay has finished, the fan will turn on
anyway far a length of time equal to the Fan Off Delay period.
If the control senses this input along with a Y signal, it will not
turn on the compressors and it will run the Heating mode.
Heating takes priority.
Fan ON Mode with the Sensor Option - (ON) -
When this
option is turned ON, the supply fan will continue running when
the zone sensor based temperature control is satisfied. This
option applies only in systems using a zone sensor and only in
Occupied mode. With this option turned OFF, or in Unoccupied
mode, the fan will go off when the zone sensor based
temperature control is satisfied and will go on only when there is
a call for heating or cooling. Turning this option ON is an
equivalent of selecting fan ON (rather than AUTO) in systems
with a thermostat. In a thermostat system, the fan control follows
the thermostat's G signal. In sensor systems and in the Occupied
mode, the fan control follows the Fan ON Mode option.
Space Sensor Enable - (OFF) (INTERNALLY SET) -
The
control will use this input if it detects the device.
RAT Sensor Enable - (OFF) (INTERNALLY SET) -
The control
will use this input if it detects the device.
Demand Ventilation (ON) -
Setting this parameter on tells the
control to expect a signal from a 0-10VDC CO
2
sensor. The
default setting for CO
2
is 1,000 ppm.
Demand Ventilation Setpoint - (1000 ppm) -
This Setpoint is
the maximum Indoor Air Quality (IAQ) level that the control will
allow. It is adjustable from 700 ppm to 1500 ppm.
IAQ Sensor Range - (5,000 ppm) -
This tells the control what
the full range is for a specific IAQ sensor. It can be changed
from 0 to 10,000 ppm.
Cooling Mode Enable (ON) -
This tells the control if it has
Cooling Available (Mode Switch). If this option is turned off,
cooling operation is disabled. Note that this parameter does not
affect cooling operation in Comfort Ventilation mode.
Heating Mode Enable - (ON) -
This tells the control if it has
Heating Available (Mode Switch). If this option is turned off,
heating operation is disabled. Note that this parameter does not
affect heating operation in Comfort Ventilation mode.
Space Setpoint Offset - (3 °F) -
The Space Setpoint Offset is
the +/- value the control will use to offset the Space Setpoint
when the slidebar Space Sensor is used. For example, if the
Space Setpoint Offset value is set to 3.0 °F, shifting the slidebar
all the way in minus direction will decrease the Space Setpoint
by 3.0 °F and shifting it all the way in plus direction will increase
the Space Setpoint by 3.0 °F. It is adjustable from 0 °F to 5 °F.
ASCD Override -
This is not an option parameter but rather a
one-time command issued by pressing the Test / Reset / Up
button pressed and released within five seconds; the ASCD’s
will be set to zero for one cycle.
Run Test (Commissioning Test) -
This is not an option
parameter but rather a one-time command, activated by setting
parameter 1 ON.
When the Run Test command is issued, the control will shut the
unit down if it is running and then start a Run test sequence:
1.
Turn on the Fan and then turn on all the compressors, one
at a time, with a 15-second delay between them. Con-
denser fan #1 turns on with compressor #1, condenser fan
#2 turns on with compressor #2. After the last compressor
has been turned on, the control will run the compressors
for the programmed minimum run time and then turn them
all off. Condenser fans are also turned off.
2.
The control will then turn on the Heat stages, one at a time,
with a 15 second delay between them. The control will run
each Heat stage for three minutes and then turn all the
Heat off.
3.
The control will then open the Economizer to the 100%
open position and wait five minutes before closing it to the
Minimum Position. When the economizer is at 100%, the
exhaust damper will be open to 100% and the exhaust fan
runs for 5 minutes, then shuts down.
4.
During this Run Test operation the control will read all the
installed sensors and verify that their readings are good. If
any error is detected the control will display the appropriate
error. During the Run Test, the supply fan continues to be
monitored via the Air Proving Switch, and a fan failure will
cause a unit shutdown.
After the control is finished with the Run Test the normal
operation will resume. This command is a good method to use
to ensure the control is operating and all input and output points
are functional.
