Air Supply
Air Supply
Air Requirements
•Compressed air supply pressure:
•Air hoses: use grounded hoses that are correctly sized for your system.
•Air regulator and
Trapped air can cause a pump or dispense valve to cycle unexpectedly, which could result in serious injury from splashing or moving parts. Use
To reduce the risk of fire and explosion if using a Graco electrostatic gun, a shutoff valve must be installed in the gun air line to shutoff the atomizing and turbine air to the gun. Contact your Graco distributor for information on air shutoff valves for electrostatic applications.
•Air line filter: to filter oil and water out of the air supply and help avoid paint contamination and clogged solenoids. See Technical Data, page 37, for air filtration requirements.
Air Connections
1.Tighten all system air and fluid line connections as they may have loosened during shipment.
2.Connect the main air supply line to the main air inlet (136). This air line supplies the solenoids, valves, and pumps. Do not use this line to supply the gun’s atomizing air.
3.Connect a separate, dedicated, clean air supply line to the air inlet (159a) of the air flow switch.
This air supplies gun atomizing air. The air flow switch detects air flow to the gun and signals the controller when the gun is being triggered.
NOTE: If there is more than one gun (for example, a separate gun for each color), the atomizing air outlet (159c) must be branched to each gun. For ease of maintenance, install a ball valve at all air line tees.
Figure 11 Atomizing Air and Air Manifold Connections
Key
Connection | Description |
|
|
A | Air inlet |
|
|
C | Air cutoff output |
| (plugged) |
M | Exhaust muffler |
|
|
S | Solvent cutoff output |
| (plugged) |
20 | 332458B |
