Seaflo 42 Series - User Manual

DIAPHRAGM PUMP MANUAL
42 & 43 Series
42 & 43 series retains the raw power and pressure of its predecessors, but also can adapt to situations
where huge flow is not needed. Compact but capable, it is a great fit for tight spaces. It also may be
configured with different inlet types, each with their own unique fittings, to be sure that it fits any
application you can find.
APPLICATIONS
• Yacht/RV/caravan pressurized water system
• Sprayer fixtures (vehicle-mounted sprayers, electric sprayers)
• Cleaning machines, humidifier, water purification, medical apparatus
• Food beverage filling & liquid transfer
• Solar water system
• Any other pressurization system
INSTALLATION
Materials
1 diaphragm pump with related accessories
2 (at least) pieces of flexible, reinforced hose piping, with collapsing strength of twice the inlet collapsing pressure, hose must be
minimum 1/2" ID(42 series) or 3/4" ID(43 series)
4 stainless steel hose clamps and screws
4 screws to fasten the pump to the mounting surface
1 electrical cutoff switch
1 fuse
1 screwdriver
1 strong cutting implement for tubing
(if desired) Teflon tape or sealant
Setup
1 .The pump may be mounted in any position. If mounted vertically, the pump head should be in the down position to avoid leakage
into the motor casing in the event of a malfunction.
2.Secure the feet, but do not compress them. Overtightening the securing screws may reduce their ability to dissipate noise and
vibration.
3.Intake hose must be minimum 1/2" (13 mm) ID (42 series) or 3/4" (19 mm) ID (43 series) reinforced hose. Main distribution line
from pump outlet should also be 1/2" (13mm) ID (42 series) or 1/2" (13 mm) ID (43 series) with branch and individual supply lines
to outlets no smaller than 3/8" (10 mm).
4. Plumb the system using high pressure (2 x pump rating), braided, flexible tubing to minimize vibration/noise.

Summary

Pump Applications

Pump Installation Guide

Required Materials for Installation

Lists all components and tools needed for pump installation.

Pump Setup Procedure

Step-by-step instructions for mounting and connecting the pump.

General Usage Notes

Understanding the Bypass

Electrical Information

Pump Repair Kits

Pump Troubleshooting Guide

Troubleshooting Pulsating Flow

Diagnoses issues causing pump cycles on and off.

Troubleshooting Noisy Pump

Identifies causes and solutions for pump noise.

Troubleshooting Prime Failure

Addresses issues where the motor runs but no discharge occurs.

Troubleshooting Motor Start Issues

Resolves problems related to the motor failing to turn on.

Troubleshooting Pump Not Stopping

Diagnoses why the pump fails to turn off after fixtures are closed.

Troubleshooting Low Flow and Pressure

Identifies causes for reduced flow rate and pressure.

Important Safety Caution

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

This document provides a comprehensive manual for the 42 & 43 Series diaphragm pumps, detailing their function, applications, installation, troubleshooting, and repair. The pumps are designed to offer robust power and pressure while being adaptable to situations that do not require exceptionally high flow rates. Their compact size makes them suitable for installations in confined spaces. The design also allows for configuration with various inlet types, each equipped with specific fittings to ensure compatibility with a wide range of applications.

Function Description

The 42 & 43 Series diaphragm pumps are primarily designed for fluid transfer and pressurization in various systems. They operate by using a diaphragm to create pressure, moving fluid through the system. The pumps are capable of handling different types of fluids, making them versatile for both domestic and industrial applications. A key feature of these pumps is their ability to maintain consistent pressure and flow, which is crucial for the efficient operation of connected systems.

Usage Features

The pumps are highly versatile and find application in numerous scenarios:

• Yacht/RV/Caravan Pressurized Water Systems: They are ideal for providing a reliable and consistent water supply in recreational vehicles and marine environments, ensuring comfort and convenience for users.
• Sprayer Fixtures: The pumps can be integrated into vehicle-mounted and electric sprayers, delivering the necessary pressure for effective spraying in agricultural, gardening, or cleaning tasks.
• Cleaning Machines: Their ability to generate pressure makes them suitable for various cleaning machines, enhancing their efficiency in tasks ranging from household cleaning to industrial applications.
• Humidifiers: The pumps can supply water to humidifiers, ensuring a steady and controlled mist output for environmental conditioning.
• Water Purification Systems: They play a role in water purification processes by facilitating the movement of water through filtration stages, contributing to the production of clean water.
• Medical Apparatus: In certain medical devices, these pumps can be used for precise fluid handling, highlighting their reliability and control.
• Food Beverage Filling & Liquid Transfer: The pumps are suitable for transferring food-grade liquids and for use in filling machines, adhering to hygiene standards required in the food and beverage industry.
• Solar Water Systems: They can be incorporated into solar water heating or pumping systems, assisting in the circulation of water.
• Other Pressurization Systems: Beyond these specific examples, the pumps can be adapted for any system requiring fluid pressurization.

For optimal performance, specific installation guidelines must be followed. The pump can be mounted in any position, but vertical mounting should position the pump head downwards to prevent leakage into the motor casing in case of a malfunction. The mounting feet should be secured without over-compressing them, as this can reduce their ability to dissipate noise and vibration.

The intake hose must be a flexible, reinforced hose with a minimum ID of 1/2" (13 mm) for the 42 series and 3/4" (19 mm) for the 43 series. The main distribution line from the pump outlet should also be 1/2" (13mm) ID for both series, with branch and individual supply lines to outlets no smaller than 3/8" (10 mm). The system should be plumbed using high-pressure, braided, flexible tubing to minimize vibration and noise.

It is crucial not to apply inlet pressure exceeding 30psi, and ideally, no inlet pressure at all. Kinks or fittings that cause excessive restrictions should be avoided. A strainer should always be attached to the inlet side, and all fittings must be securely fastened to prevent leaks. Clamps should be used at both ends of the hose to prevent air leaks. If a check valve is installed, its cracking pressure should not exceed 2 psi. When using sealers or plumbing tape, care must be taken not to overtighten, as they can be sucked into the pump.

The pump should be wired on its own dedicated circuit, with the positive lead connected to the positive terminal of the battery and the negative wire to the negative terminal. An easily accessible switch should be installed to control electricity to the pump, allowing it to be turned off when not in use for extended periods or when the tank is empty. The electrical circuit must be protected with an over-current protection device (fuse) in the positive lead, with a 15 amp fuse recommended for this pump. The pump circuit should not include any other electrical loads. Proper wire sizing, as per the electrical information chart, is essential for the length of wire used. After installation, the voltage at the pump motor should be checked while the pump is operating to ensure full voltage availability.

Maintenance Features

Proper maintenance is crucial for the longevity and optimal performance of the diaphragm pump. The manual emphasizes several key aspects of maintenance:

• Bypass Adjustment: The bypass comes preset for optimal operation. However, if the application requires a different setting, it can be adjusted by carefully tightening the screw to increase or loosening it to decrease the minimum operational pressure of the bypass. It is strongly recommended to consult a professional technician for bypass adjustments to avoid damaging the pump.
• Sanitizing and Winterization: Lack of sanitizing and maintenance is a common cause of underperformance. Users are advised to perform maintenance and winterize the pump at appropriate times, especially before and after periods of storage, to ensure its continued efficiency and prevent damage.
• Troubleshooting: The manual provides a comprehensive troubleshooting guide for common issues:
  • Pulsating Flow (Pump Cycles On and Off): This can be caused by kinks in the lines, plumbing lines or fittings being too small, clogged faucets and filters, or air leaks due to loose fittings.
  • Noisy Operation: This issue might arise if the mounting feet are compressed too tightly, the mounting surface is flexible and adding noise, there are loose head/screws, or if the pump is plumbed with rigid pipe, which can transmit noise more easily.
  • Failure to Prime but Motor Operates (No Pump Discharge): Potential causes include a restricted intake or discharge line, an air leak in the intake line, or a punctured pump diaphragm.
  • Motor Fails to Turn On: This could be due to loose or improper wiring, no power to the pump circuit, a blown fuse or tripped thermal protection, a failed pressure switch, or a defective motor.
  • Pump Fails to Turn Off After All Fixtures Are Closed: This issue can stem from a punctured diaphragm, a discharge line leak, a defective pressure switch, insufficient voltage, or clogged valves in the pump head.
  • Low Flow and Pressure: Possible reasons include an air leak at the pump intake, accumulation of debris inside the pump or plumbing, a worn pump bearing (often accompanied by loud noise), a punctured diaphragm, or a defective motor.

The manual also includes a caution against deviating from the installation instructions, as any action outside the recommended guidelines may damage the pump, and such damage caused by inappropriate installation or operation will not be covered by warranty. This underscores the importance of adhering strictly to the provided instructions for both installation and maintenance.

Seaflo 42 Series Specifications

General

Model	42 Series
Voltage	12V DC
Dry Run Protection	Yes
Housing Material	Polypropylene
Impeller Material	Santoprene
Operating Temperature	32°F to 140°F (0°C to 60°C)
Type	Diaphragm Pump
Chamber	4
Self-Priming	Yes