Det-Tronics C7052J UV/IR Flame Detector used with R7494, R7495 Controller - Manual (Page 21)

Power is connected to a load circuit through the normal-
ly closed contacts of the Alarm relay. Detection of a fire
causes the contacts to open and remove power from the
load. If the pre-programmed voting requirements are
met, power is applied to an extinguishing load through
the Fire Zone relay. Power is connected to a process
control circuit through the normally energized Fault relay.
In the event of a system fault or when the controller is in
the Test mode, the contacts open and remove power
from the process. An annunciation device is connected
to the power source through the Fault relay to provide a
visual or audible warning of a system failure.
STARTUP PROCEDURE
The startup procedure should be performed after instal-
lation of the equipment is complete.
1. After making the electrical connections and setting
the switches, plug the controller into the wiring con-
nector.
2. Disable any extinguishing system connected to the
system.
3. Turn on the input power to the system and perform
the “Initial and Periodic Checkout Procedure.”
4. If the controller is operating normally and is pro-
grammed correctly, remove any mechanical block-
ing devices and restore power to the extinguishing
loads.
INITIAL AND PERIODIC CHECKOUT
PROCEDURE
The entire system should be periodically checked with a
UV/IR test lamp to be sure that the detectors are not
obstructed, that the area “seen” by the detector has not
changed, and that there is no fault in the oi circuit.
1. Place the Mode switch in the TEST position. The
FAULT LED will be illuminated.
CAUTION
Placing the controller in the Test mode inhibits the
outputs, rendering the system incapable of actuating
any extinguishing or alarm circuits that are connect-
ed to it. However, for maximum safety, secure the
output loads that would normally be actuated by the
system before performing the checkout procedure.
2. Shine the UV/IR test lamp into the viewing window
of the detector under test. The ALARM LED is illu-
minated and the corresponding DETECTOR LED
blinks.
3. If the voting requirements are met, the appropriate
FIRE ZONE LED(s) is also illuminated.
4. Turn off the UV/IR source. The FIRE ZONE LED
remains on if it was previously illuminated. The
DETECTOR LED remains on, but stops blinking.
5. Repeat steps 2 through 4 for each detector in the
system.
6. After all detectors have been checked, reset the
system by placing the Mode switch in the NORMAL
position. All LEDs except the POWER LED are off.
7. Restore power to the output loads and remove any
mechanical blocking devices.
Star Programming Checkout Procedure
1. Secure output loads (remove power from valves,
relays or other devices that might otherwise be
actuated by the UV/IR system) before testing.
2. Apply power to the UV/IR detection system.
3. Ensure that the area being monitored is operating
under normal conditions (equipment that would nor-
mally be on is on).
4. Place the UV/IR controller toggle switch in the NOR-
MAL position and monitor for one hour.
— If the rockers have been set correctly, transient
radiation in the area should not activate the system.
The upper and lower LED displays should remain
dark. If this is the case, lower (more sensitive) set-
tings can be attempted.
— If the system sensitivity is set too high, one of the
eight DETECTOR LEDs will turn on and the appro-
priate FIRE ZONE LEDs will turn on if voting require-
ments are met. If this happens, set the rocker
switches for more counts per gate, for more con-
secutive gates required for actuation, or for a short-
er gate length and repeat the test. Altering detector
placement may also decrease the susceptibility of
the system to transient radiation.
For further assistance, contact the Field Support Group
at Detector Electronics.
MAINTENANCE
The C7052J Detector requires no periodic calibration.
However, to maintain maximum sensitivity, the detector
viewing windows must be kept clean at all times. Even
a small amount of certain UV or IR absorbing materials
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