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Automatic Fuel Oil Transfer Pump Set

Application | Features | Overview

The Automatic Fuel Oil Transfer Pump Set is a state of the art system duplex pump sequencing and monitoring system.  This system includes automatic lag pump back-up features that improve fuel system availability and safety.  A pump set mounted LCD display is used to monitor day tank and pump set status and alarms.

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ATPSF Automatic Transfer Pump Set
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ATPSF Automatic Transfer Pump Set

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  • Application
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Preferred ATPS pump sets are used for emergency diesel generator facilities as well as dual fuel fired boiler facilities. The microprocessor-based monitoring panel can be configured to monitor and control transfer pumps, return pumps, tank level gauges, and tank leak detectors.

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  • Features
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  • Loop or Day Tank Fuel Oil Transfer System
  • Microprocessor Based Monitoring and Control with Automatic Lead/Lag Function
  • Automatic Pump Prime and Suction Line Integrity Check
  • Main Storage Tank Monitoring
  • Building Automation System (BAS) Interface
  • Alarm and Event Summaries
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  • Overview
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The Automatic Fuel Oil Transfer Pump Set is a state of the art system duplex pump sequencing and monitoring system.  This system includes automatic lag pump back-up features that improve fuel system availability and safety.  A pump set mounted LCD display is used to monitor day tank and pump set status and alarms.

The Automatic Fuel Oil Transfer Pump Set is a factory packaged, pre-engineered, pre-wired and pre-plumbed system that includes pumps, industrial motors and accessories.  These systems are shipped to the job site, requiring only external fluid and electrical connections ensuring undivided responsibility of delivering fuel at the selected flow.

Standard Equipment Includes:

  • Microprocessor Based Control With 16 Line x 40 Character LCD Display and Alarm / Event And Operator Action Log
  • Control Circuit Transformer (if required)
  • Alarm Bell With Alarm Silence / Reset Pushbutton 
  • Two “Hand-Off-Auto” Switches 
  • “Pump On” Indicators
  • Two Magnetic Motor Starters With Overload Protection 
  • Two Motor Circuit Breakers 
  • Two Pump & Motor Assemblies
  • Two Relief Valves, Two Check Valves And Four Ball Valves
  • Two Simplex Inlet Strainers
  • Inlet Compound Pressure Gauge
  • Pump Discharge Pressure Gauges 
  • Three Gauge Isolation Valves
  • Pump Set Flow Proving Switch And Base Assembly

Motor Power: 120, 208, or 230 Vac 1 phase or 208, 230, or 460 Vac 3 phase

Control Circuit Power: 120 Vac 1 phase step down transformer included when selected motor voltage is other than 120 Vac

Fluid: No. 2 or No. 4 Fuel Oil is standard.  Consult factory for other fuel types

Pump: Bi-rotational, positive displacement type with cast iron housings and self-adjusting mechanical seals

Motors: Base mounted, Totally Enclosed Fan Cooled (TEFC) construction

Strainer: Simplex, ½", 1", 1½", or 2" (according to inlet line size) complete with 40 mesh basket (Duplex strainer available)

Fuel Oil Transfer System: The lead fuel pump is energized when day tank oil level falls below 50%.  The lead pump continues to operate until the day tank level is greater than 80%.  Upon the next call for fuel, the lead pump automatically alternates.  The control system automatically energizes the back-up pump upon detecting a low level condition, (40% full condition).  Both pumps then continue to operate until the level of oil reaches the high level point, 90% full condition.  Upon detection of loss of flow or pressure or lead pump thermal overload the control system automatically energizes the backup pump and de-energizes the lead pump. 

Loop Fuel Oil Transfer System: The lead fuel pump is energized upon a call for oil and run continuously until the demand is removed.  Upon the next call for fuel, the lead pump automatically alternates.  The lead pump shall automatically rotate every 1 to 168 hours or shall be manually selected by the operator.  Upon detection of loss of flow or pressure, or lead pump thermal overload the control system shall automatically energize the backup pump and de-energize the lead pump. 


Automatic Pump Prime And Suction Line Integrity Check: Fuel transfer system suction piping, pump prime and pump operation are automatically verified each week (adjustable).  The lead pump is automatically energized.  Once the lead pump has been proven, the lag pump is energized and run through the same test.  These tests are recorded in the controller memory with a time-date stamp for later verification.  If either lead or lag pump fails any of these test, the control system generates an audible and visual alarm and logs the “Failed Pump” condition.  To permit pump set testing, fuel oil piping system design must allow pump set discharge to return to the main storage tank.  The above diagrams show suitable Loop and Day Tank system arrangements.   Additionally system designs may include return flow pumps or solenoid valves.  Consult Factory for additional information.

Modbus Communication Interface: An easy to setup RS485 Modbus interface is available for off-site monitoring and control.

Alarms / Event Summary: Up to 200 alarms, system events and operator actions are listed in “first in first out” order with time/date stamp.  Alarms include “Pump Thermal Overload”, “Pump Loss Of Flow” and “Pump Set Failure” with “Day Tank Leak”, “Day Tank High level” and “Day Tank Low level” added for Day Tank Systems.  The following events are recorded with time/date stamp: “Pump Started”, “Pump Control Switch in “Off” position”, “Pump Set Prime Test OK” and “Pump Selected as Lead”.

Duplex Strainer (Option “-D”): A Preferred duplex fuel oil strainer is provided on the suction side of the pump set instead of the two simplex strainers.  S trainer baskets are 40 mesh stainless steel.

Duplex Strainer Differential Pressure Switch (Option “-DP”): A differential pressure switch/indicator with isolation cocks is provided to energize a audible and visual alarm should an excessively dirty strainer condition be detected (Option “-DP”  can only be used with option “-D”).

Pump Set Leak Detector Switch (Option “-L”): A float operated Containment Basin Leak detection Switch is provided to shut off the pumps and energize an audible and visual alarm should a pump set leak be detected.

Main Storage Tank Monitoring (Optional): Up to two (2) tanks, Model TG-EL-D5-2 may be integrated into the Model ATPS Transfer Pump Set

Telephone Modem (190604): The Modem allows the controller to dial out to an alphanumeric pager in response to alarms or events and allows a technician to dial in to the controller to view all displays and make tuning adjustments.

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