SEAFLO 12V 80 PSI 21 Series DC Viton Diaphragm Pump User Manual

Introduction

Thank you for choosing the SEAFLO 21 Series DC Viton Diaphragm Pump. This pump is engineered for reliable performance in various applications, including liquid transfer, spraying, circulation, filtration, and dispensing. Its compact design, self-priming capability, and ability to run dry without damage make it a versatile solution for your water pressure needs. This manual provides essential information for the safe installation, operation, and maintenance of your pump.

Important Safety Instructions

• Read all instructions carefully before installation and operation.
• Ensure the power source matches the pump's voltage requirements (12V DC).
• Always disconnect power before performing any service or maintenance.
• Do not pump flammable liquids. This pump is designed for water and compatible non-flammable liquids.
• Protect electrical connections from moisture.
• Install a fuse in the positive (+) lead as close to the power source as possible. Refer to specifications for recommended fuse size.
• Keep hands and loose clothing away from moving parts.
• Ensure adequate ventilation around the pump during operation.

Setup and Installation

1. Mounting

The pump features an industry-standard mounting pattern for easy installation. Mount the pump in a dry, well-ventilated area, protected from direct sunlight and freezing temperatures. The pump can be mounted in any position, but it is recommended to mount it with the pump head down if possible, to prevent potential water accumulation in the motor housing in case of a seal leak.

Figure 1: Side view of the pump, illustrating the mounting feet for secure installation.

2. Plumbing Connections

Use appropriate fittings and hose clamps to secure all plumbing connections. Ensure all connections are watertight to prevent leaks and maintain pump efficiency. The pump is designed to serve 1 or 2 3/8" (10 mm) outlets.

• Inlet: Connect the inlet port to your water source. A filter is recommended on the inlet line to prevent debris from entering the pump.
• Outlet: Connect the outlet port to your distribution system.
• Avoid kinks or sharp bends in hoses, which can restrict flow.

Figure 2: Front view of the pump, highlighting the inlet and outlet ports for plumbing connections.

3. Electrical Connections

This pump operates on 12V DC. Ensure correct polarity when wiring. The red wire is positive (+), and the black wire is negative (-).

• Connect the red (+) wire to the positive terminal of your 12V DC power source.
• Connect the black (-) wire to the negative terminal of your 12V DC power source.
• Install an appropriately sized fuse (refer to specifications) in the positive (+) lead, as close to the battery or power source as possible, to protect the pump and wiring.
• Use marine-grade or automotive-grade wiring of sufficient gauge to minimize voltage drop.

Figure 3: Top-down view of the pump, displaying the product label with electrical specifications and wiring details.

Operating Instructions

1. Initial Priming

The SEAFLO 21 Series pump is self-priming. To prime the pump:

1. Ensure all plumbing connections are secure and the inlet line is submerged in the liquid source.
2. Open a faucet or outlet downstream from the pump to allow air to escape.
3. Apply power to the pump. The pump will run, drawing liquid and expelling air.
4. Once a steady stream of liquid flows from the outlet, close the faucet. The pump's pressure switch will automatically shut off the pump.

2. Automatic Operation

The pump features a built-in pressure switch. When a faucet or outlet is opened, the pressure in the system drops, and the pump automatically turns on. When the faucet is closed, the pressure builds up, and the pump automatically turns off. This on-demand operation conserves power and extends pump life.

3. Running Dry

The 21 Series pump can be run dry without harm. However, continuous dry running is not recommended as it can lead to unnecessary wear. Always ensure the pump has an adequate supply of liquid for optimal performance.

4. Intermittent Duty

This pump is designed for intermittent duty. This means it should not be run continuously for extended periods without rest. Allow the pump to cool down between prolonged operational cycles to prevent overheating and ensure longevity.

Maintenance

• Regular Inspection: Periodically check all plumbing and electrical connections for tightness and signs of wear or corrosion.
• Inlet Filter: If an inlet filter is installed, clean it regularly to prevent clogging and maintain optimal flow.
• Winterization: In freezing conditions, drain all liquid from the pump and plumbing system to prevent damage from ice expansion. Running RV antifreeze through the system is also an option.
• Cleaning: Clean the exterior of the pump with a damp cloth. Do not use harsh chemicals or immerse the pump in water.

Troubleshooting

Pump Fails to Start or Run

• No Power: Check power supply, fuse, and all electrical connections. Ensure correct voltage (12V DC).
• Pressure Switch: If the system is under pressure, the switch will keep the pump off. Open a faucet to relieve pressure.
• Motor Overheat: If the pump has been running for an extended period, it may have overheated. Allow it to cool down.

Low Flow or No Flow

• Clogged Inlet Filter: Clean the inlet filter.
• Air Leak: Check all inlet plumbing connections for air leaks.
• Restricted Line: Inspect hoses for kinks or blockages.
• Low Voltage: Ensure the power supply is providing adequate voltage to the pump.

Pump Cycles On and Off Rapidly (Pulsating)

• Small Leak: Check for small leaks in the plumbing system, including faucets and connections.
• Restricted Flow: A partially closed valve or clogged filter can cause rapid cycling.
• Accumulator Tank (if installed): If an accumulator tank is used, check its air charge.

Leaks from Pump Head

• Loose Connections: Tighten all plumbing connections.
• Damaged Diaphragm/Seals: If leaks persist, the diaphragm or seals may be damaged and require replacement. Contact customer support.

Specifications

Warranty and Support

For warranty information, technical support, or to purchase replacement parts, please contact SEAFLO customer service. Keep your purchase receipt and product model number handy for faster service.

You can typically find contact information on the manufacturer's official website or through your point of purchase. For general inquiries, visit the SEAFLO Store on Amazon.