Sanitary Sewage Pump Stations - The City of Wentzville | Missouri

SECTION 405Electrical405.1 Description. This section covers the requirements for pump stationelectrical work and associated appurtenances.405.2 Pump Station Control Panel. The selected pump supplier shall bedirectly responsible for all panel fabrication and component installation. The pump control panelshall meet the following specifications:405.2.1 General Control Panel Requirements: It is the intent of thesespecifications that all motor control and control components be supplied by a single supplier.Controls shall not be assembled on site. System supplier shall be a UL 508 certified facility andshall be regularly engaged in the manufacture of controls for the municipal water/wastewaterindustry. The pump control panel shall be assembled by a company having at least ten yearsexperience in the construction of such control equipment. The City Engineer shall be the solejudge as to whether the alternate equipment is to be considered as an approved equal.Approval of an alternate system by the City Engineer will not relieve the alternate system ofstrict adherence to these specifications.405.2.2 Control Panel Operation.a. Demand: Basic operation of the pumps shall be as a pump-down, lead/lag,common off system with high level alarm. Panel shall accommodate connectionof floats (level sensors to be provided by pumping equipment supplier) with thefollowing functionality at a minimum:Retention Tank High LevelWetwell High LevelLag DemandLead DemandStopb. Control: Each pump shall be controlled through a “Hand-Off-Auto” switch. In theHand position, the pump shall run continuously until the selector switch is turnedto Off or Auto.In the Off position, the pump shall not run.In the Auto position, the pump shall be controlled by the floats in the wetwell. Ademand for each pump shall be delayed through adjustable time delay relayswith a range of .1 - 10 seconds. Initially, the time delay for the first pumpdemand shall be set at 8 seconds, with required additional pump demand timedelays being staggered 8 seconds apart. Operation of the lag pumps shall notbe run through the lead demand float.c. Control Panel Alarms: The following alarms shall operate individual pilot lights asdescribed under General Control Panel Equipment.1. Pump Fail: A pump failure (timed from pressure switch indicatingpressure after pump is demanded) shall be annunciated only by theCity of WentzvilleConstruction Specifications and Standard DetailsEffective Date: 06/10/09 400 -15