Graco 3A1705J Fluid Circulation, Circulation Through Reactor, Follow Startup

Fluid Circulation

Fluid Circulation

Circulation Through Reactor

NOTICE

Do not circulate fluid containing a blowing agent without consulting with your material supplier regarding fluid temperature limits.

To circulate through gun manifold and preheat hose, see Circulation Through Gun Manifold, page 60.

1. Follow Startup, page 55.

To avoid injection injury and splashing, do not install shutoffs downstream of the PRESSURE RELIEF/SPRAY valve outlets (BA, BB). The valves function as overpressure relief valves

when set to SPRAY . Lines must be open so valves can automatically relieve pressure when machine is operating.

2.See Typical Installation, with circulation, page 13. Route circulation lines back to respective component A or B supply drum. Use

hoses rated at the maximum working pressure of this equipment. See Technical Specifications, page 102.

3. Set PRESSURE RELIEF/SPRAY valves (SA, SB) to PRESSURE RELIEF/CIRCULATION .

GA GB

SASB

4.Set temperature targets. See Targets, page 50.

5.Press to circulate fluid in jog mode until A and B temperatures reach targets. See Jog Mode, page 60 for more information about jog mode.

6.Press to turn on the hose heat zone.

7.Turn on the A and B heat zones. Wait until the fluid inlet valve temperature gauges (FV) reach the minimum chemical temperature from the supply drums.

8.Exit jog mode.

9.Set PRESSURE RELIEF/SPRAY valves (SA,

SB) to SPRAY .

GA GB

SASB

3A1705J 59