York YPAL 050 User Manual

JOHNSON CONTROLS

FORM 100.50-NOM6 (1207)

There are three stages of heating available:

•

  W1 – First Stage of Heating 

•

  W2 – Second Stage of Heating 

•

  W3 – Third Stage of Heating

Unoccupied heating operation is the same as Occupied.  
A programmable thermostat would be required in order 
to change the heating temperature settings between 
occupied and unoccupied.

The following System Parameters must be programmed 
through the Simplicity Control:

•

  “CV OCCUPIED COOLING SETPOINT” – us-

ing Parameter 10 under the PROGRAM key on 
the Simplicity control board or under the COOL-
ING SETUP tab in the Simplicity PC software 
package.

•

  “CV OCCUPIED HEATING SETPOINT” – us-

ing Parameter 11 under the PROGRAM key on 
the Simplicity control board or under the HEAT-
ING SETUP tab in the Simplicity PC software 
package.

•

  “CV UNOCCUPIED COOLING SETPOINT” 

– using Parameter 12 under the PROGRAM 
key on the Simplicity control board or under 
the COOLING SETUP tab in the Simplicity PC 
software package.

•

  “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.

The Simplicity Control will stage on the cooling as 
follows:

•

  At cooling start up

–  If the space temperature is between 1.5° F and 

1.9° F above the “CV OCCUPIED COOLING 
SETPOINT” or “CV UNOCCUPIED COOL-
ING 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 space 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 space temperature is greater than 2.0° F 

or more above the “CV OCCUPIED COOL-
ING SETPOINT” or “CV UNOCCUPIED 
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 compressor 
from System 1.

•

  If after 3 or 5 minutes the space temperature is 

between 1.5° F and 1.9° F above the “CV OC-
CUPIED COOLING SETPOINT” or “CV UN-
OCCUPIED 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 space 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 space 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.