Trojan Technologies Aquafine TrojanUVLogic Series, Руководство по установке и эксплуатации, Страница: 106 / 186

Control Panel (CP)
Trojan UV Logic Operations & Maintenance
2006-1-19
7-2
mode Alarm suspension) + (the adjustable 10 to
999 second Alarm Delay) = minimum 28 or
maximum 1017 seconds before alarms can be
activated after start-up.
Shutdown
If the system is being controlled by a Plant PLC
and if the Remote On signal is removed, the
system will turn off and remain in Standby
mode. In Standby mode the UVR Lamps are
de-energized.
The UV System will also initiate a shutdown
sequence for the UVR in response to only one
Critical fault condition – “Reactor HiTemp”
(Reactor High Temperature). When a UVR
Critical alarm is active, the CCB will shut off the
lamps. Refer to table of Critical alarm details at
the end of this chapter.
Lamp Control and Monitoring
The UVR CCB is set to a fixed power level.
Each Lamp is controlled directly from the Lamp
ballast. All Lamps for the UVR will be turned
on/off together if commanded by the CCB and
all operate at the same power level.
Specially designed current sensing circuits
detect Lamp on/off status. The status of each
individual Lamp whether it’s faulted or okay is
displayed by the CP Operator Interface on the
panel door.
When switched on, Lamps are initially
energized for a Warm-up period regardless of
Local or Remote control. After the warm-up
period has expired, the Lamps are
automatically switched to the operational power
level (100% Power Level).
Wiping System (Optional)
When an automatic and integral mechanical
cleaning system is provided, the cleaning
system uses a mechanical wiping action to de-
scale the Lamp Sleeves. The cleaning system
is fully operational without requiring the UVR to
be placed out of service. A UVR cleaning
sequence may be initiated automatically as
scheduled by the CCB CP controller.
In Automatic mode, the interval between
cleaning sequences is determined by the
"cleaning sequence" timer, which is normally
pre-set at 8 hours and adjustable to 0, 0.5, 1, 2,
3, 4, 6, 8, 12, 24, 48, or 96 hours.
For systems with greater than 30 cm chambers,
they will use the Home Limit Switch. At the start
of a wiping sequence, the UVR Wiper extend
sequence is energized and counts out a
specific number of revolutions using the
Proximity Sensor. After reaching the extended
position, the UVR Wiper extend sequence is
de-energized, the motor is stopped, pauses for
3 seconds and the retract sequence is
energized. The Proximity Counter will count
back past “0” until it has forced the Wiper Home
Limit Switch to engage, which sends a signal
that stops the motor. After a 3 second pause,
the CP initiates an extend sequence and the
motor is then instructed to move the Wiper
Plate out 5 revolutions from the Wiper Home
Limit Switch to the
Park position. The CCB
uses a "Wiper stroke" timer during the wiping
sequence for fault logic.
For systems with chambers 30cm and smaller
an EPDM spring is attached to the Stop Plate.
This spring is used to reset the Park position
instead of the Home Limit Switch on the larger
Models. At the start of a wiping sequence the
UVR Wiper extend sequence is energized and
the Wiper extends to the extended position
using a proximity counter. After reaching the
extended position, the UVR Wiper extend
sequence is de-energized and the retract
sequence is energized until the proximity
counter has returned to zero. However, a reset
to the Park position is performed every 15
cycles. During this reset cycle the proximity
sensor continues counting past Zero until Wiper
compresses the EPDM Spring and the
Proximity Sensor detects a reduction in
revolution speed. The motor is then de-
energized, and the Wiper is now in the Home