Direct Gas Make-Up Air
44
OPTIONAL NIGHT SETBACK
Night Setback Schedule
• The night setback schedule is established within
the programmable thermostat on the remote
panel. The schedule must be set for the occupied
and unoccupied hours of the controlled space.
Night Setback Fan Control
• During occupied hours, the fan sequence of
operation is the same as that described in the
“Supply Fan” section.
• During unoccupied hours the fan is turned off.
• If there is a call for heating from the space
thermostat, the fan will be turned on to allow for
tempering operation.
• When the call for heating from the space
thermostat ends, the fan will be turned off.
Night Setback Heat Control
• During occupied hours, the heating sequence of
operation is the same as that described in the
“Heat” sections.
• During unoccupied hours, the unit is off until there
is a call for heating from the space thermostat.
When the unit is enabled by a call for heat from
the space thermostat, the heat is also enabled
and the discharge temperature overridden to a
maximum value to provide the maximum amount
of heat to the space.
• When the call for heating from the space
thermostat ends, the unit will be turned off.
Night Setback Variable Volume Control
• During occupied hours, the variable volume
sequence of operation is the same as that
described in the “Optional Variable Volume”
section.
• During unoccupied hours, the unit is off until
there is a call for heating from the space
thermostat. When the unit is enabled by a call for
heat from the space thermostat, the supply fan
will run at minimum speed.
• When the call for heating from the space
thermostat ends, the unit will be turned off.
Night Setback Recirculation Control
• During occupied hours, the recirculation sequence
of operation is the same as that described in the
“Optional Recirculation” section.
• During unoccupied hours, the unit is off until there
is a call for heating from the space thermostat.
When the unit is enabled by a call for heat from
the space thermostat, the recirculation damper
will be opened to provide a maximum amount of
recirculated air to the unit.
• When the call for heating from the space
thermostat ends, the unit will be turned off.
Sequence of Operation
