Installation

Air Line

1.Install the air line accessories as shown in FIG. 2. Be sure the air line supplying the accessories is grounded.

a.The fluid pressure can be controlled with either an air regulator (F) to control the air into the pump, or with a fluid regulator (H) to control the fluid out of the pump.

b.Install a bleed-type master air valve (B) close to the pump. This valve is required in your system to relieve air trapped between it and the pump when the valve is closed. Trapped air can cause the pump to cycle unexpectedly which could result in serious injury including splashing in the eyes or on the skin, or injury from moving parts. Be sure the bleed valve is easily accessible from the pump, and is located downstream from the air regulator.

c.Install a second air valve (E) upstream from all air line accessories to isolate them during clean- ing and repair.

d.Install an air line filter (D) to remove contami- nates such as dirt, moisture, and oil from the compressed air supply.

2.The air valve does not require lubrication.

3.Install a grounded, flexible air hose between the accessories and the pump air inlet. See Technical Data on page 24 to determine the air inlet size of your pump. Use a minimum 1/2 in.(13 mm) ID air hose.

Fluid Suction Line

See Technical Data on page 24 to determine the fluid inlet size of your pump.

Use conductive hoses (see FIG. 2). Screw the suc- tion line into the pump inlet snugly while supporting the inlet with a wrench. Use a compatible liquid thread sealant on connections to prevent air from entering the fluid line.

For maximum suction lift (wet and dry) information, see Technical Data on page 24.

Use an agitator to prevent fluid from settling out. Part number 245081 Agitator Kit (accessory) is available.

Fluid Outlet Line

1.Use electrically conductive fluid hoses (P). See FIG. 2. Screw the fluid fitting into the pump outlet (N) snugly while supporting the outlet with a wrench. See Technical Data on page 24 to determine the fluid outlet size of your pump.

2.Install a fluid regulator (H) at the pump fluid outlet to control fluid pressure, if desired. See Air Line step 1a for an alternative method to control pressure.

3.Install a fluid drain valve (J) near the fluid outlet.

A fluid drain (J) valve is required in your system to relieve pressure in the hose if it is plugged. The drain valve reduces the risk of serious injury, including splashing in the eyes or on the skin, or contamination from hazardous fluids when relieving pressure. Install the valve close to the pump fluid outlet. To use the valve as a circulation valve, connect a tube (K) between the valve and pail.

NOTICE

Some systems may require installation of a pressure relief valve at the pump outlet to prevent overpressur- ization and rupture of the pump or hose.

Thermal expansion of fluid in the outlet line can cause overpressurization. This can occur when using long fluid lines exposed to sunlight or ambient heat, or when pumping from a cool to a warm area (for exam- ple, from an underground tank).

Overpressurization can also occur if the pump is being used to feed fluid to a piston pump and the intake valve of the piston pump does not close, caus- ing fluid to back up in the outlet line.

311688L

7

Page 7
Image 7
Graco 311688L important safety instructions Air Line, Fluid Suction Line, Fluid Outlet Line

311688L specifications

The Graco 311688L is a high-performance airless paint sprayer, designed for both professional contractors and DIY enthusiasts looking to achieve a flawless finish on their projects. Engineered for reliability and efficiency, the Graco 311688L stands out in the competitive market of paint sprayers, offering a range of features that cater to various painting tasks.

One of the key features of the Graco 311688L is its powerful motor, which delivers consistent pressure to ensure an even and smooth application of paint. The unit is designed to handle a variety of coatings, including unthinned paints, stains, and sealers, making it versatile enough for numerous projects, from indoor walls to outdoor fences. The sprayer can cover large areas quickly, reducing the amount of time needed to complete a job.

Equipped with Graco's ProXChange technology, the Graco 311688L allows for easy replacement of the pump without the need for tools, minimizing downtime during projects. This feature is especially beneficial for professionals who need to maintain efficiency on job sites. The sprayer also includes the Graco SmartControl technology, which provides a consistent spray pattern regardless of the selected pressure. This technological advancement aids in achieving optimal results while allowing users to adjust the spray patterns according to their needs.

In terms of ergonomics, the Graco 311688L is designed with user comfort in mind. The lightweight design and integrated handle make it easily portable, while the adjustable spray tip enables users to customize the size and shape of the spray fan for precision work. Additionally, the unit features a built-in suction tube that allows for painting directly from a paint bucket, reducing mess and increasing convenience.

Safety has not been overlooked in the Graco 311688L design. It features a pressure relief valve that ensures safe operation, preventing unwanted discharge of paint when the motor is turned off. The unit also comes with a durable construction that enhances its longevity, making it a worthwhile investment for anyone serious about painting.

To sum it up, the Graco 311688L offers a blend of power, efficiency, and user-friendly features that make it an excellent choice for various painting applications. Whether you're a seasoned professional or a weekend warrior, this airless paint sprayer provides the performance and reliability needed to tackle any paint job with confidence.