Repair

Servicing the Control Box

Replacing the Isolation Board

NOTICE

To avoid damaging the circuit boards when servicing the control box, wear Part No. 112190 grounding strap on your wrist and ground appropriately.

To avoid electrical component damage, remove all system power before plugging any connectors.

1.Follow the steps in Before Servicing, page 34.

2.Loosen the screws (124) and remove the enclosure cover (117).

3.Note the position of the isolation board cables. See the following table, Electrical Schematics, page 27, and Figure 24. Disconnect the cables from the isolation board (111). Remove the brackets (110).

Isolation Board

Cable Destination

Connector

 

J1 (non-intrinsically

Gateway Module

safe)

 

J2 (non-intrinsically

Optional Non-IS Color

safe)

Change Module

J3 (intrinsically safe)

Barrier Board

 

 

J4 (intrinsically safe)

Optional IS Color

 

Change Module

4.Remove the screws (128) holding the isolation board (111) to the barrier cover (107). Remove the isolation board.

5.Install the new isolation board, using the screws (128).

6.Install the brackets (110). Reconnect the cables to the positions as noted above.

7.Turn on power at the main circuit breaker.

8.Turn on the control box power switch. Check that the two green LEDs (D7, D8) and two yellow LEDs (D6, D14) are on. See Figure 24.

9.Reinstall the cover (117) and tighten the screws (124).

Figure 23 Replacing the Isolation Board

To reduce the risk of fire or explosion, be certain that the barrier board is connected to J3, on the IS side of the isolation board. If connected incorrectly, the intrinsic safety of your system is compromised.

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332709B

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Graco 332709B Servicing the Control Box, Replacing the Isolation Board, Isolation Board Cable Destination Connector
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332709B specifications

The Graco 332709B is a versatile and innovative airless paint sprayer designed to meet the demands of both professional contractors and DIY homeowners. This robust unit is engineered to deliver impressive performance, enabling users to achieve a high-quality finish on various surfaces, making it an ideal choice for a wide range of painting projects.

One of the standout features of the Graco 332709B is its powerful motor, which allows for consistent paint flow and the ability to spray a variety of materials, from thin stains to heavy paints. The adjustable pressure control system is designed to provide optimal spray control, enabling users to fine-tune the pressure based on the specific project requirements. This feature ensures a smooth application, reducing the risk of overspray and providing a more precise result.

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The Graco 332709B also boasts compatibility with a wide range of spray tips, allowing users to achieve different spray patterns and widths. This versatility makes it suitable for various applications, from detailed work to large-area coverage.

In summary, the Graco 332709B stands out for its combination of power, convenience, and versatility. Its advanced technologies and user-friendly features make it an excellent choice for anyone looking to achieve professional results while enjoying the ease and efficiency of an airless paint sprayer. Whether for residential or commercial applications, this model is designed to deliver performance and reliability for all painting endeavors.
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