responsibility to properly install and set up each
gate, such that a gate closed limit switch, one per
gate, is transmitted to the UV Control Center. Each
gate must be able to receive one opening and one
closing signal from dry 10 amp contacts located in
the Control Center. To insure disinfection under
all conditions, gate interlocking, both mechanical
and electrical, is required to prevent all gates
from being closed at any given time. These
interlocks are the responsibility of the gate
manufacturer.
During automatic operation, if channels are to be
placed in and out of service, accommodations should
be made to drain the channel when the channel is not
in service. Channels, when out of service, must be
completely isolated and not allow any leakage
through slide gates or valves to enter final
effluent.
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a.
A level control device shall be placed [at the discharge end]
[both ends] of each channel. Level control device shall maintain
constant channel water level within tolerances required to keep
lamps submerged and shall prevent excessive water layer over the
top lamps.
b. [Automatic level controller shall be pivoted above the effluent
water surface so that each unit shall open across the width of the
channel. Counterweights shall be adjusted using counterbalance
weight at startup for the full flow range and shall not require
adjustment after initial setting. Material of construction shall
be stainless steel, Lexan, Delrin bearings, counterweights of
carbon steel with galvanized finish and corrosion resistant seal
of neoprene or other suitable elastomer.] [Fixed weir shall be
stainless steel.] [_____].
c.
A water level sensor shall be situated within the channel to
provide an alarm indication and/or automatic system shutdown
should the water level drop below the uppermost part of the top
row of horizontal lamps. Alarm contacts for remote annunciation
shall also be provided.
2.2.7
Nameplates
Major equipment items shall have the manufacturer's name, address, type or
style, model or serial number, and catalog number on a plate secured to the
item of equipment.
2.3
ELECTRICAL
2.3.1
General
a.
The system shall be divided into the proper number of parallel
electrical subsystems for the peak design flow.
b.
Each electrical subsystem shall be powered from a distribution
center and shall include ground fault circuit detection, circuit
protection, modules, and interconnecting cables.
SECTION 11376
Page 15