Specifications include, but are not limited to: Provide materials, installation, and/or repairs for grinder pump systems. Installations to be completed according to manufacture recommendations, the requirements of the City of Brandon’s system specifications, and MDEQ requirements. All force mains will be installed with a tracer wire. Repairs will be on an as needed basis. Repair costs will be on a case-by-case basis. Additional miscellaneous parts not listed on the price list will be paid for according to the cost of the part on an as needed basis. Additional equipment required for extensive repairs not listed in the price list will be approved on a case-by-case basis. SPECIFICATIONS • Wastewater grinder pumping stations shall be electrically operated and shall be wet pit, totally submersible type capable of achieving long term stable operation against widely fluctuating changes in TDH conditions. • The station shall include a minimum of one sewage grinder pump with lift-out sealing flanges, internal piping with check valve and gate valve, and lifting chain. All electrical connections to be made in the control panel. The station shall include a NEMA 4X electrical panel with an outside alarm light and audible alarm. • Grinder pumping stations and accessories shall be of the following or equal; Pentair Hydromatic HV200 Series; Hyd-0-Grind as manufactured by F. E. Meyers Co.; E/One by Environment One Corporation. All new systems must have an approved submittal before any installation begins. • Electrical service requires a double pole breaker 30 AMP 230 Volt dedicated circuit. • Three liquid level sensors for a simplex unit shall be furnished and installed with the pumping unit to control "pump off," “pump on," and "high water alarm” operations. An additional sensor and control alternator shall be provided and installed for the lead and lag pump operation for a duplex unit. Level sensors shall be as recommended by the manufacturer. • The station shall be equipped with a wall mounted (exterior wall of house) or pedestal mounted electrical control panel in a NEMA 4X, weather tight, non-corrosive fiberglass enclosure with a dead front outer door with a locking hasp or handle. • The panel shall be provided with proper overload protection, lightning protection, circuit breaker, electrical terminals, and all other electrical control equipment required for a complete installation. The electrical panel shall be UL listed/CSA approved. The entire electrical installation shall be in strict compliance with requirements of the National Electrical Code. • The exterior of the control panel shall be equipped with a red flashing high water alarm light, a motor seal failure light, and audible high-water alarm. The high-water alarm light shall glow dim always except under alarm condition. The audible alarm shall produce 85 db at 10 feet distance. Under alarm conditions, the light shall glow brightly and flash. The alarm light shall consist of a weather-proof bracket fixture with a red globe. • The motor seal failure sensor shall consist of an electrode probe, a sensing unit, and a flashing amber light mounted on the interior surface of the control panel. The electrode probe shall be factory-installed in a sealed chamber so that if any water enters the chamber through the lower seal, the electrode will be energized, and a signal will be transmitted to the sensing unit at the control panel and activate the amber alarm light. • The pump station discharge piping shall include a self-cleaning ball-type check valve, hydraulically sealed discharge flange, and a gate valve with handle extension, as illustrated by the installation drawings included herewith. The sealing flange shall permit lifting the pump from the wet pit without mechanical unfastening. • Sealing shall be produced by a heavy rubber diaphragm, which shall seal to the discharge flange. The size of the discharge pipe shown on the attached drawings is the minimum size allowed. Larger pipe sizes may be recommended and/or required by the pump manufacturer. • Pump basins shall be of non-corrosive fiberglass construction. The basins shall be a minimum of 24 inches in diameter for a simplex installation (48 inches for a duplex) and 60 inches in depth unless otherwise approved by the City. • The entire grinder pump installation, including pump, valves, discharge piping, electrical controls, and accessories shall be subjected to an operational test by the homeowner or his representative and the pumping unit installation contractor in the presence of a representative of the City. The test shall be conducted before the system is put into service. A set of as-built drawings must be provided at the completion of the project.
