Lincoln Electric PRISM COMPACT, Руководство оператора

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C-5
ACCESSORIES
OPERATION & DIAGNOSTICS
NORMAL OPERATION DESCRIPTION
A Prism® Compact with thermal suppression has active
protection even during a power outage since a discharge of
suppressant is exclusively dependent on heat induced rupture of
the detection tubing. The detection tubing is routed through the
filter (dirty air) side of the filter bank. Intake and exhaust dampers
are used to contain an event and maximize the effectiveness of a
suppressant discharge. A smoke detector shuts down the fan
motor and closes the dampers if smoke or particulate due to
bypass of a damaged filter is detected in the fan exhaust but this
will not trigger a discharge since that can only be caused by heat
from a thermal event.
B. FAN/DAMPER SHUTDOWN
There are three alarm conditions that will cause the fan to shut
down and the dampers to close. The first cause is a smoke
detector alarm, the second is heat induced rupture of the
The lower of the two stack lights (on top of the Prism®) will
activate on any thermal event alarm and give a pulsed code of the
type of alarm condition that the unit saw to cause it to shut down.
A set of pulses followed by a 3 second off time can be decoded
according to the alarm codes chart. If there are no system
malfunctions, the dampers close when the fan is turned off.
Offline cleaning initiated when the fan is shut down will delay
damper closing until the cleaning is complete.
C. DISCHARGE NOTIFICATION
Flashing of the Stack Light’s upper high intensity light indicates
there has been a suppressant discharge. A set of pressure
switches are contained in a Firetrace dual pressure switch box.
The 195psi normal charge on the detection tubing keeps the
discharge switch open. A significant loss of pressure caused by
detection tubing rupture, closes the switch which triggers system
shutdown and stack light visual notification.
D. SYSTEM MALFUNCTION ALARMS
The Prism® thermal suppression system monitors important
functional conditions and provides visual display of any fault by
flashing a pulsed code on the LED stack light’s lower light. There
are four coded alarms.
Inlet and exhaust damper alarm. Dampers are closed when the
fan is off but are triggered to open when the fan is started. After
opening, the damper’s actuator switch sends a verification signal
that they are opened. If a signal is not received within 10
seconds, the fan is shut down and a coded flash of pulses
identifies which damper failed to open.
The dual pressure switch box monitors pressure in the red
detection tubing. If the pressure drops too low due to a slow leak,
it trips a pressure switch and flashes a coded pulse on the lower
stack light.
The smoke detector alarm triggered by smoke or particulate
bypassing the filters triggers a coded pulse on the lower stack
light
ACTIVATION
STEP 1 – With the ball valve on the suppressant tank still closed,
remove the detection tubing pressure gauge and replace with the
filling adapter included in the Nitrogen charge kit. Nitrogen charge
kits are available through your Lincoln sales representative.
STEP 2 – Using a regulated nitrogen supply, pressurize the
detection tubing through the filling adapter to 195 psig (10.3 bar).
STEP 3 - Remove the filling adapter and thread the pressure
gauge & 0-ring into its place to verify that the tubing is
pressurized to at least 195 psig. This is the normal pressure at
70°F. Pressure will drop at lower temperatures.
STEP 4 – Wait 30 minutes and then observe the pressure gauge.
Any decrease in pressure is an indication of a leak. Locate the
leak using a soapy water solution at each of the red detection
tubing connection points. Fix the leak, then recharge the system.
STEP 5 – After confirming there is no leakage in the detection
tubing, SLOWLY rotate the tank’s ball valve lever counter
clockwise to the “ON” position.
CAUTION: If the ball valve lever is opened abruptly, activation of
the cylinder valve may occur, causing the unit to discharge
STEP 6 – Tamper proof the unit by removing the ball valve lever,
then screwing the tamper-proof clip to the valve. Complete
installation of clip by using zip tie through clip’s backside holes.
The unit is now fully armed and ready for use.
Valve shown turned to “on”
position. Remove handle to
install locking clip
Screw clip to
valve
Zip tie through
holes on both
sides
Suppressant
Tank
PRISM COMPACT
®