Graco 3A1705J - page 32

Overview
Coolant only flows through the secondary heat
exchangers when the heat exchanger controlvalves
(VA, VB) are open and the A and B component
temperatures are below thetarget temperatures set
on the ADM. See Fig. 24.
When the control valves (VA, VB) close, the A
and B material has reached target temperature.
Coolant flows through thebypass control valve (VC),
circulation pump (CP), sight glass (SG), proportioner
coolantfill bottle (HF), and back to the heat exchanger
in the engine coolant loop. See Fig. 23
HE
SG
CP
VC
VB VA
HE
ProportionerCoolant Loop — A and B Valves Closed
(not heating material)
Figure23
SG
CP
VC
VB VA
HE
HE
Proportioner CoolantLoop — A and B Valves Open
(heating material)
Figure 24
32 3A1705J