York YPAL 051 User Manual

JOHNSON CONTROLS

FORM 100.50-NOM6 (1207)

– If 

“CONTINUOUS FAN OPERATION WITH 

SENSOR” is turned on using Parameter 55 
under the PROGRAM key on the Simplicity 
control board, or under the FANS tab in the 
Simplicity PC software package the supply 
fan will operate continuously whenever the 
unit is in the occupied mode.

∗

 

If  “TURN OFF CONTINUOUS FAN 
WHEN START HEAT” is turned on using 
Parameter 7 under the PROGRAM key of 
the Simplicity control board or under the 
FANS tab in the Simplicity PC software 
package the supply fan will shut down on 
a call for heat and then start based on the 
“HEAT, FAN ON DELAY” programmed 
time.

The supply fan will be de-energized when:

•

  The supply fan has been on for 30 seconds and 

anyone of the following occurs:

–  When the 24-volt input to terminal “G” of 

the Simplicity control terminal board is re-
moved.

–  Any time the 24 volt input to terminal Y1, 

Y2, Y3, Y4, W1, W2, or W3 of the Simplic-
ity control terminal board is removed and the 
“COOL, FAN OFF DELAY” or “HEAT, FAN 
OFF DELAY” have timed out.  The “HEAT, 
FAN OFF DELAY” timer does not start until 
the control receives a signal that the gas valve 
is de-energized.

–  Any time there is a call for cooling or heating 

operation by a space sensor is lost and the 
“COOL, FAN OFF DELAY” or “HEAT, FAN 
OFF DELAY” have timed out.  The “HEAT, 
FAN OFF DELAY” timer does not start until 
the control receives a signal that the gas valve 
is energized.

–  When the unit goes into the unoccupied mode 

and there is no call for cooling or heating 
operation.

The following values need to be programmed:

“COOL, FAN ON DELAY” – Using parameter 4 under 
the PROGRAM key on the Simplicity control board 
or under the FAN tab in the Simplicity PC software 
package.

“COOL, FAN OFF DELAY” – Using parameter 5 under 
the PROGRAM key on the Simplicity control board 
or under the FAN tab in the Simplicity PC software 
package.

“HEAT, FAN ON DELAY” – Using parameter 2 under 
the PROGRAM key on the Simplicity control board 
or under the FAN tab in the Simplicity PC software 
package.

“HEAT, FAN OFF DELAY” – Using parameter 3 under 
the PROGRAM key on the Simplicity control board 
or under the FAN tab in the Simplicity PC software 
package.

The supply will be energized when:

•

  The supply fan has been off for 10 seconds and 

anyone of the following occurs:

–  There is a 24 volt input to terminal “G” of the 

Simplicity control terminal board.

–  There is a 24 volt input to terminal Y1, Y2, 

Y3, Y4, W1, W2, or W3 of the Simplicity con-
trol terminal board and the “COOL, FAN ON 
DELAY” or “HEAT, FAN ON DELAY” have 
timed out.  The “HEAT, FAN ON DELAY” 
timer does not start until the control receives 
a signal that the gas valve is energized.

–  There is a call for cooling or heating operation 

initiated by a space sensor demand and the 
“COOL, FAN ON DELAY” or “HEAT, FAN 
ON DELAY” have timed out.  The “HEAT, 
FAN ON DELAY” timer does not start until 
the control receives a signal that the gas valve 
is energized.