2.6
B. Install aneroid bellows assembly for atmospheric pressure reference in the
junction box on the leachate sump side riser pipes, unless otherwise noted.
Use manufacturer-supplied vented cable full length to bellows.
C. Level transmitters shall be intrinsically safe. Circuit shall be rendered
intrinsically safe by Zener Barrier in the control panel.
D. Acceptable Manufacturer: WIKA Instrument Corporation IL-10 transducer
with Pressure Systems, Inc. Series 815 Aneroid Bellows.
E. Schedule:
Location Range Cable Length
Phase III Primary Leachate Sump 0-100 inches water 125 feet
Phase III Secondary Leachate Sump | 0-100 inches water 125 feet
PUMP-DOWN SWITCHES
A.
The secondary leachate pump-down switches shall be tethered, wide-angle
float type.
Pump-down switches shall be normally open contacts with an activation range
between 7 and 9 inches as installed in the secondary leachate sumps.
Pump-down switches shall be sized to operate without binding or hanging
when installed in the secondary leachate sumps with the provided secondary
leachate pumps.
The switch element shall consist of a SPDT, snap-acting mechanical contact.
Switch element activation shall not be sensitive to rotation of the float or
turbulence in the sump.
Mercury-based switch elements shall not be acceptable.
The float body shall be PVC or other suitable material, and the cable shall be
flexible 16-gauge, 3-conductor SJOW cable.
Float switch installed inside the leachate vault shall be intrinsically safe.
Circuit shall be rendered intrinsically safe by Zener Barrier in the control
panel,
The pump-down switch shall be supplied with mounting hardware adequate to
provide a stable, consistent operating range for the switch.
Acceptable Manufacturer ~ SJE-Rhombus Milliampmaster or approved equal.
File No. 3066.09 Instrumentation and Controls 16500 - 3 of 5 Revised January 2019
