SUGGESTED SPECIFICATION FOR DUPLEX VSSF AND VSSF-QD UNIT WITH TYPE SBS CONTROLLER FOR INSTALLATION IN CONCRETE PIT

Furnish and install, as shown on plans, a Federal Pump Corporation Type VSSF (VSS-QD if Quick-Disconnect fittings are required) duplex submersible Fed-Flush sewage pump unit. The pumps shall be of cast iron construction with non-clog, balanced impellers, and rated as shown in the pump schedule.

The unit shall be so designed that sewage entering the pit shall flow through a stainless steel strainer basket in each pump discharge pipe. Solids will be retained in the baskets and the liquid will continue through the pump casings into the pit. Solids will be flushed into the discharge line during the pump discharge cycle and a control valve ahead of each pump shall prevent backup into the house line. An overflow fitting shall allow liquid to flow directly into the pit during pump discharge cycles, if necessary.

Each motor shall be submersible, air filled, protected by double-sealed oil chamber, and shall have a stainless steel shaft, thermal sensors, moisture sensing probe in the seal chamber, and 25 ft. waterproof cable. Motors shall be rated as shown in the pump schedule.

Pump control shall be by a Type SBS Submers-a-bulb controller, including four mercury tube bulbs on a Style 1 suspension bracket. A NEMA-4 junction box shall be provided together with a control panel in a NEMA-1 wall mounting enclosure, including therein fusible disconnect switches, magnetic starters, HOA selector switches, automatic pump alternator, required relays and transformers, pump-run lights plus an alarm bell and silencer with lights to indicate high water and outer seal failure conditions.

For units to be furnished with quick-disconnect fittings (VSSF-QD), add the following specification paragraph: Each pump shall have Quick-Disconnect fittings including base plate, guide brackets, base elbow and lifting cable. Each pump shall be removable from the pit by riding up on the guide rail (4x4 wide flange beam) without disconnecting any piping or electrical connection, and without anyone entering the pit. Pumps shall be relowered to their operating position in the same manner.

For concrete pit and thru-cover pump discharge, add the following specification paragraph:
Furnish a Style PF-1 angle iron pit frame and steel cover for the concrete wet pit. The pit cover shall be gas-tight with pump removal plates, flanged openings for pump discharge pipes, vent connection and control openings. The frame and cover shall have a corrosion-resistant coating and shall be fabricated for a pit size and top opening size as shown in the pump schedule.

For concrete pit and under-cover pump discharge, add the following specification paragraph: The pumps shall discharge through the side wall of the wet pit. Provision shall also be made in the side wall for venting and for control and power wires. Furnish a Federal Type Q access door for installation in the top slab of the concrete pit. Pit size and door size shall be as shown in the pump schedule.

The access door shall be single-leaf with steel frame, diamond steel leaf, steel hinges and torsion bars for easy opening. The door and frame shall have a corrosion-resistant coating.

Also furnish a concrete valve chamber of the size shown in the pump schedule, with steel-covered top access opening, to house the discharge check valves, gate valves and wye fitting.

Pump Schedule:

Model Number:

_______GPM per pump _______FT. TDH

Motor HP:_______ RPM ________

Phase:________ Cycles: 60 Volts:_______

Pump Pit Size:_______ in. x_______ in. x_______ in. deep

Top Opening (or Access Door) Size:_______ in. x_______ in.

Valve Chamber Size (If Any): _______ in. x_______ in. x_______ in. deep