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74
JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
Sequence of Operation
– 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.
SUPPLY FAN OPERATION
Constant Volume (CV)
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.