BG FB-2 Diaphragm Pump Installation Guide

BG FB-2 Diaphragm Pump

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Specifications

• Motor

  • Type: 12 VDC, permanent magnet, totally enclosed, non-ventilated
  • Leads: 12 AWG, 12″ long Duty Cycle: Intermittent
  • Temperature: Motor is not equipped with thermal protection. For user safety, optimal performance, and maximum motor life, the motor surface temperature should not exceed 180 • F (82° C)

• Weight:
  7870/7970: 8LBS (3.6 kg)

• Pump

  • Type: 5 chamber positive displacement diaphragm pumps, self priming, capable of being run dry, demand or bypass mode
    Liquid Temperature: 140°F (60°C) Max.

  • Priming Capabilities: 14 Feet (4m)

  • Max Pressure: 100 PSI (6.7 Bar)

• lnlet/Outle Ports:

  • 7870: 1/2″ FNPT
  • 7970: Quick Attach

• Materials of Construction:

  • Housing: Polypropylene Glass Filled Diaphragm: Santoprene
  • Valves: Viton
  • Fasteners: Stainless Steel
  • Motor Shell: Coated Steel

Quick Attach Nylon Inlet/Outlet Port Fittings (minimum 1/2″ HB Recommended for Inlet Use)

Demand Models

Bypass Models

Installation Recommendations

• Mounting:
  Determine the optimum location for your pump.

  • The pump should be mounted in a dry place and away from any source of heat. If an enclosure is used, special instructions for cooling the motor may be necessary. Consult the factory.
  • Do not subject the pump to extreme high or low (freezing) temperatures while in operation. (Operating ambient temperature range is 32° F to 115° F).
  • The pump may be mounted horizontally with the outlet port on the right when viewed from the pump end or with the pump above the mount, or vertically with the pump above or below the motor.

• Plumbing:

  • Use suction hose on inlet of pump. We recommend use of flexible tubing with proper pressure rating. (Minimum of 1/2″ I.D.)
  • Pump will prime only if all pressure is relieved from outlet port.
  • It is recommended that pure water be pumped or an in-line sediment filter (50 mesh) be installed at the inlet side to keep foreign debris out of the system. If a check valve is installed in the plumbing, it must have a cracking pressure of no more than 2 PSI (0.14 bar).
  • Avoid any sharp bends which may crimp tubing and restrict flow. Use 90° elbow fittings if necessary.
  • The pump should always be mounted prior to any components which could introduce particles to the water; thus, preventing them from entering the pump chambers and possibly causing clogging.

• Electrical:

  • The FB-2 series pumps are designed for intermittent duty. Make sure that “OFF” periods are sufficient. Consult the factory for particular data and design criteria.
  • Be sure power supply used is adequate for the application.
  • Pump and motor specifications are based on an alternator charged battery (13. 7 VDC).
  • Use sufficient battery supply power. Smaller ATV and lawn tractor batteries may affect pump performance due to low voltage and amp ratings.

Installation and Operation Precautions

1. The pump is equipped with a pressure sensing demand switch that controls the maximum operating pressure. (Demand series only)
2. In addition, never subject the pump to pressures above 125 PSI (8.5 bars)
3. As long as there is inlet water pressure, the pump will not stop forward flow of water even if the motor is turned off. Be sure the system has positive means of shutting off water supply.
4. Do not operate pump in an explosive environment. Arcing from the motor brushes, switch or excessive heat from an improperly cycled motor may cause an explosion.
5. Do not locate the pump motor near low temperature plastics or combustible material. The surface temperature of the motor may exceed 250° F (120° C).
6. Do not pump gasoline or other flammable liquids. Pump head materials are designed for use with water only. Do not use with petroleum products.
7. Do not assume fluid compatibility. If the fluid is improperly matched to the pumps’ elastomers, a leak may occur.
8. To prevent electrical shock, disconnect power before initiating any work. In the case of pump failure, the motor housing and/or pump fluid may carry high voltage to components normally considered safe. Therefore, always consider electrical shock hazard when working with and handling electrical equipment. If uncertain, consult an electrician. Electrical wiring should only be done by a qualified electrician per local and state electrical codes.

Installation & Operation

1. Turn off water supply
2. Cut flexible tubing in sufficient length to avoid any stress on the tubing where it connects to the pump or the fitting on any accessory.
3. Insert tubing into pump ports. If fittings are the John Guest type, be sure tubing is inserted past the resistance point until it bottoms out against the port stop. If compression fittings with threaded nuts are used, insert tubing until it bottoms out in the port and hand tighten the compression nut until the connection is tight. Then use a wrench to tighten the nut 1/2 turn clockwise or follow the wrench tightening instructions provided by the fitting manufacturer.
4. The pump is now ready for operation. Turn on water supply to allow water to flow to the pump.
5. If the power source is a transformer, plug the appropriate supplied/approved transformer into the receptacle and connect the pump to the transformer. If the power source is not a transformer, connect the pump to the appropriate power source. Open the discharge or dispensing valve. Allow water to circulate, purging any entrapped air.
6. The pump will now start building pressure. Operating pressure will vary with flow rate, flow valve, feed-water pressure and line voltage. Check for fitting leaks.
7. If compression fittings with threaded nuts are used, observe any leaks after pump has run for approximately 15 minutes. Further tighten compression nuts approximately 1/8 to 1 /4 of a turn on all fittings in the system. Wait 15 minutes and repeat the leak check. Note: further adjustments should not be necessary although it may take several days of operation before all the air has been purged and the system is stabilized.
8. Adjusting the Pressure Switch. Should the pressure switch OFF setting vary with use and time to an unsuitable value, it may be adjusted for optimum performance. Turn the setscrew clockwise to increase the OFF pressure setting and counter clockwise to decrease. The screw should not be adjusted more than one half turn without consulting the factory. Excessive adjusment of the pressure switch could cause low system pressure, rapid cycling ON/OFF operation, and reduced pump and motor life. Damage may occur. The warranty does not cover improper adjustment of the pressure switch.

Troubleshooting Guide

• Pump will not start
  Check:

  • Correct voltage(+/- 10%) and electrical connections
  • Fuse or breaker
  • Pressure switch operation & correct volt­age at switch
  • Rectifier or motor for open or grounded circuit
  • Locked drive assembly

• Pump will not prime (no discharge with motor running)
  Check:

  • Debris in strainer
  • Restriction (kinks) in inleUoutlet tubes
  • Debris or swelling in inlet/outlet valves

• Pump will not shut off
  Check:

  • Air trapped in outlet line or pump head
  • Correct voltage to pump
  • Debris in pump inleUoutlet valves
  • Loose drive assembly or pump head screws
  • Pressure switch operation/adjustments

• Leaks from pump head or switch
  Check:

  • Loose screws at switch
  • Switch diaphragm ruptured or pinched
  • Punctured diaphragm if fluid is present

• Servicing:

  • Every year: Check system against operating standards
  • Every 2-3 years: We recommend replacing the diaphragm and checking against operating standards

Demand Models

Bypass Models

Replacement Parts

Pressure Sensing Demand Switch

The PowerFLO Series pump is controlled by a built-in pressure sensing demand switch. When a faucet or valve is opened down stream of the pump, line pressure drops thus starting the pump automatically. Conversely, when the valve shuts, the line pressure increases turning the pump off automatically. The pressure switch actuates in response to the pump outlet pressure at a predetermined and preset pressure. The pump label indicates the predetermined shut OFF pressure. Typically, the OFF pressure is accurately set at the factory and the ON pressure is within an allowable range below that value. In response to the characteristics of the system in which the pump is installed, the flexibility and length of the tubing, the faucet or valves and the duration that they are open; these pressure settings may vary. Therefore, variations in pressure setting are expected with use or over time.

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