ENCLOSURE SECTION.--In the following
is next to the FLAME DET ALARM indicator.
paragraphs we will describe the switch/indicators
It illuminates when a loss of continuity in the fire
of the ENCLOSURE section (D).
or the Halon system occurs. This is caused by loss
of continuity between the flame detector and
The first switch/indicator is located at the top
signal conditioner or loss of 115-volt ac power to
left side of the enclosure section. It is a split-legend
the detection system. Power is supplied by the
indicator. The upper half is FLAME DET
115-volt ac CB in the FSEE.
ALARM and illuminates when the UV sensor
The next indicator down is a split-legend
has sensed a flame in the enclosure. The lower
indicator. The upper half, labeled HIGH TEMP,
half, HALON FLOOD, is a momentary-contact
is the indicator fed from the two temperature
switch. Depressing this switch releases the primary
switches (set at 400F) in the enclosure. The lower
bank of Halon if the manual inhibit switch is in
half, labeled FAN RUNNING, illuminates when
the ACTIVE position at the enclosure. (NOTE:
the enclosure fan is running.
No automatic release of Halon is available into
The next indicator down is a momentary-
the enclosure.)
contact switch/indicator labeled FAN RUN/FAN
STANDBY. It selects the mode of operation for
The next indicator in this column is the
the ventilation fan. In the FAN RUN position,
ACCESS DOOR OPEN/HEATERS ENERGIZED
the fan will be running. In the FAN STANDBY
indicator. The upper half of this indicator is fed
position, the fan automatically starts when the
from switches at the two GTM doors and indicates
GTE is running below 3000 hp or the GTE is not
that a module door is open. The lower half of this
running and the enclosure temperature is above
indicator indicates the module heater is energized.
125F. The fan automatically shuts down under
The enclosure heater keeps the enclosure air
the following conditions:
temperature above 60F. This temperature is
required to prevent fuel waxing (fuel hardening)
Halon is discharged into the enclosure.
in the GTE fuel system. Control of the heater is
provided on the LOP. Indication of the heater
The GTE is running above 3000 hp.
status is provided on both the PCC and the LOP.
The GTE is not running and the enclosure
The OVERTEMP CUTOUT indicator will
temperature is below 125F.
illuminate when the heater is de-energized because
the enclosure temperature was 145F and the
The vent damper closes.
heater was on. The ICING detector indicator
measures the temperature and humidity of the
To start a GTE, the fan controller must be in
incoming combustion air. When icing conditions
the remote position and the control switch on the
occur (temperature below 41F and humidity
PCC should be in the FAN STANDBY position.
above 70 percent), this indicator will illuminate
The last three indicators down are for the
and an alarm will sound at the PCC.
vent damper. The VENT DMPR OPEN/VENT
The ANTI-ICING VALVE OPEN/ANTI-
DMPR CLOSED indicator shows the position of
the vent damper. The VENT DMPR OPEN/
ICING VALVE CLOSED indicator shows the
actual position of the anti-icing valve. Below this
VENT DMPR CLOSE switch/indicator is for
indicator is the ANTI-ICING ON/ANTI-ICING
manual control. It is only functional when
OFF momentary-contact switch/indicator. It is
the AUTO VENT CONTROL/MAN VENT
CONTROL switch/indicator is in the MAN
used to open and close the anti-icing valve and
VENT CONTROL position. The AUTO VENT
to indicate the operator's command to the valve.
CONTROL/MAN VENT CONTROL switch/
indicator is used to select the mode of operation
The last indicator in this column has a legend
above it labeled BYPASS DAMPER. Switches at
for the ventilation damper, either automatic or
manual. In automatic mode, the ventilation
the bypass damper provide signals to the PCC to
damper will open under the following conditions:
illuminate the OPEN/CLOSED status indicator
of the bypass damper.
The ventilation fan is running.
The FIRE HALON SYSTEM DISABLED
The GTE is running.
indicator, located at the top of the next column,
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