Fluid Circulation
Fluid Circulation
Circulation Through Reactor
Do not circulate fluid containing a blowing agent with- out consulting with your material supplier regarding fluid temperature limits.
To circulate through gun manifold and preheat hose, see page 33.
1. Load fluid with feed pumps, page 24.
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 oper- ating.
2.See Typical Installation, with circulation, page 8. Route circulation lines back to respective compo- nent A or B supply drum. Use hoses rated at the maximum working pressure of this equipment. See Technical Data, page 40.
3.Set PRESSURE RELIEF/SPRAY valves (SA, SB) to
PRESSURE RELIEF/CIRCULATION | . |
SA
SB
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4. Turn main power ON | . |
5. Set temperature targets, see page 25. Turn on
A and B heat zones by pressing | . |
Do not turn on 
heat zone unless hoses are already loaded with fluid.
6.Press 
to display actual temperatures.
7.Before starting motor, reduce hydraulic pressure to
the minimum required to circulate fluid until A
and B temperatures reach targets.
-
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8.Press motor 
to start motor and pumps. Cir- culate fluid at lowest possible pressure until temper- atures reach targets.
9.Turn on 
heat zone by pressing 
.
10.Set PRESSURE RELIEF/SPRAY valves (SA, SB) to
SPRAY 
.
SA
SB
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32 | 313539F |