Operation; Control System Operation; Fan Delay Adjustment - Trane Oxbox 14 Seer Series Installation Instructions Manual

8.0 OPERATION

Most single phase units are equipped with Permanent Split Capacitor
(PSC) motors (no start relay or start capacitor). It is important that
such systems be off for a minimum of 5 minutes before restarting to
allow equalization of pressures. Do not move the thermostat to cycle
unit without waiting five minutes. To do so may cause the compressor
to stop on an automatic open overload device or blow a fuse. Poor
electrical service can cause nuisance tripping in overloads or blow
fuses.
IMPORTANT: The compressor has an internal overload protector.
Under some conditions, it can take up to 2 hours for this overload to
reset. Make sure overload has had time to reset before condemning
the compressor.
The control allows the blower to operate for up to 90 seconds after the
thermostat is satisfied.

8.1 CONTROL SYSTEM OPERATION

1. Heating mode
The wall thermostat "calls for heat," closing the R--to--W circuit. The
furnace control performs a "NORMAL FURNACE OPERATING
SEQUENCE".
2.Cooling mode
In the cooling mode, The thermostat closes the R- -to- -G- -and- -Y
circuits. The thermostat will energize the compressor contactor
and the indoor blower relay. the blower motor will operate on
BLOWER-SINGLE/HI speed , After the thermostat is satisfied, the
compressor is de-energized and the cool mode delay-to-fan-off
period begins. After the delay-to-fan- off period ends, the circulator
fan is de-energized. The indoor blower can be operated
continuously by setting the thermostat fan switch at the "ON"
position.
3. Fan mode
When the circuit R- -to- -G is closed by the thermostat, the blower
motor will operate on BLOWER-LOW speed , If the thermostat
fan switch is moved to the ON position, the circulator fan
will be energized. When the fan switch is returned to the AUTO
position, the circulator fan will be de-energized.
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8.2 FAN DELAY ADJUSTMENT

As shipped, the circulator blower fan will remain on for 90 seconds
after the gas valve closes. When a call for cooling occurs，the
circulator fan comes on and remains on for 80 seconds after the
call for cooling ends. During normal heating operation, the circulator
fan will come on approximately 45 seconds after the gas valve opens.
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