York ECO2 YPAL 050 - Manual (Page 67)

67 JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
5
•
“CV UNOCCUPIED HEATING SETPOINT”
– using Parameter 13 under the PROGRAM
key on the Simplicity control board or under
the HEATING SETUP tab in the Simplicity PC
software package.
•
“SPACE SENSOR FAULT OVERIDE EN-
ABLED” must be turned on – using Parameter
8 under the PROGRAM key on the Simplicity
control board or under the SYSTEM OPTIONS
tab in the Simplicity PC software package.
Cooling Operation – Occupied or Unoccupied
The Simplicity Control will stage on the cooling as
follows:
•
At cooling start up
– If the return air temperature is between 1.5°
F and 1.9° F above the “CV OCCUPIED
COOLING SETPOINT” or “CV UNOCCU-
PIED COOLING SETPOINT” the control
will turn on the fi rst compressor from System
1 and turn on a 5 minute timer.
– If after 5 minutes the return air temperature
is between 1.5° F and 1.9° F above the “CV
OCCUPIED COOLING SETPOINT” or “CV
UNOCCUPIED COOLING SETPOINT” the
control will bring on the second compressor
of System 1 and start a 5-minute timer.
OR
– If the return air temperature is greater than
2.0° F or more above the “CV OCCUPIED
COOLING SETPOINT” or “CV UNOCCU-
PIED COOLING SETPOINT” the control
will bring on the fi rst compressor from System
1 and start a 3 minute timer. After 30 seconds,
the control will bring on the second compres-
sor from System 1.
•
If after 3 or 5 minutes the return air temperature
is between 1.5° F and 1.9° F above the “CV
OCCUPIED COOLING SETPOINT” or “CV
UNOCCUPIED COOLING SETPOINT” the
control will bring on the fi rst compressor from
System 2 and start a 5 minute timer.
•
If after 3 or 5 minutes the return air temperature
is 2.0° F or more above the “CV OCCUPIED
COOLING SETPOINT” or “CV UNOCCUPIED
COOLING SETPOINT” the control will bring
on the fi rst compressor of System 2 and start a 3
minute timer.
•
If after 3 or 5 minutes the return air temperature
is 1.5° F or more above the “CV OCCUPIED
COOLING SETPOINT” or “CV UNOCCUPIED
COOLING SETPOINT” the control will bring on
the second compressor of System 2.
The Simplicity Control will stage off the cooling as
follows:
•
If the return air temperature is within 0.5° F of
the “CV OCCUPIED COOLING SETPOINT”
or “CV UNOCCUPIED COOLING SETPOINT”
the control turns off the System 2 compressors,
if on, with a 30 second delay between the com-
pressors provided the minimum compressor run
times have been satisfi ed.
•
If the return air temperature is equal to or below
the “CV OCCUPIED COOLING SETPOINT”
or “CV UNOCCUPIED COOLING SETPOINT”
the control turns off the System 1 compressors
with a 30 second delay between the compressors
provided the minimum compressor run times
have been satisfi ed.
The Simplicity Control has the following timing cooling
functions:
•
Minimum off time of 5 minutes.
•
Minimum on time of 3 minutes – This param-
eter can be programmed from between 1 and 10
minutes using the COOLING SETUP tab of the
in the Simplicity PC software package.
Heating Operation – Occupied or Unoccupied
The Simplicity Control will stage on the heat as
follows:
•
When the return air temperature is 1.5° F – 1.9°
F below the “CV OCCUPIED HEATING” or
“CV UNOCCUPIED HEATING SETPOINT”
the control energizes the fi rst stage of heat.
•
When the return air temperature is 2.0° F – 2.4°
F below the “CV OCCUPIED HEATING” or
“CV UNOCCUPIED HEATING SETPOINT”
the control energizes the second stage of heat.
•
When the return air temperature is 2.5° F or more
below the “CV OCCUPIED HEATING” or “CV
UNOCCUPIED HEATING SETPOINT” the
control energizes the third stage of heat.