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PROCEPTOR®
TECHNICAL MANUAL
2.2
FIBERGLASS ACCESSWAY RISERS
A. Fiberglass accessway extensions: Fiberglass wound pipe.
1. Length: From top of underground tank to underside of access frame at grade.
2. Extension Sections: 0.25-inch (6-mm) minimum thickness and [24-inch (610-mm)] diameter single
continuous piece, without joints unless approved by the manufacturer.
3. Sealant: Watetight Flexible Caulking, Sikaflex 255 or Sikaflex 221 or approved alternate to provide
watertight seal at extension collar joining to tank on bottom and access frame at top.
PART 3 – EXECUTION
3. 1
EARTHWORK
A. Excavating and trenching and backfilling are to meet local building code.
B. Backfill per Zurn Green Turtle Installation Instructions. Pea gravel is preferred backfill material.
3.2 INSTALLATION
A. Install fiberglass interceptors according to manufacturer's installation instructions.
3.3 CONNECTIONS
A. Piping installation requirements are to meet local code for sanitary waste and vent piping. Drawings indicate
general arrangement of piping, fittings, and specialties.
B. Make piping connections between interceptors and piping systems.
STANDARD PROCEPTOR OIL / GREASE POINT ALARM SPECIFICATION SHEET
Description
The Zurn Green Turtle Oil/Grease Point Alarm is specifically designed for use in Proceptor Oil or Grease Gravity type
separators. The unit contains no moving parts, eliminating maintenance due to mechanical malfunction.
An integrated pulse card (PMC) is mounted directly onto the probe in an explosion proof epoxy coated housing. This allows the
alarm panel electronics to be mounted up to 1 km (0.7 mile) away using inexpensive 2-conductor shielded wire. Wetted parts
are 316SS and Teflon, and the alarm panel housing is Type 4 metal, providing a tough, yet economical, solution for switch point
elevation alarm in Proceptor Separators.
A relay is included for user-supplied remote devices such as pump controls, connection to building automation systems, etc.
Operation
The probe length is determined by the distance from the desired alarm point up to the process connection of the probe head.
The bottom 100 mm of the probe is a Teflon-coated active capacitance probe, which is calibrated with clean water by the
installer or operator. The remainder of the probe is sealed within a stainless tube so that any level changes of the upper air
surface are discounted.
During wastewater flows, water is gradually displaced through the separator as the oil/grease rises to the surface and accumulates.
When the tip of the probe, which is normally submerged in water, senses a decrease in capacitance from contact with the oil/
grease, the alarm switch closes a relay contact and triggers an alarm light and buzzer at the panel. This is the signal for the
maintenance operator to have the tank pumped out and then refill with clean water. Once the unit is refilled with clean water
the alarm light will go out.
