Model H-2000/H-3500 Proportioning Unit
26 159421A-1, Issue 2
continued operation of the hose heating system in case of signal or SSR failure. To
convert to manual control, proceed as follows:
a)
With power OFF, remove the terminal jumper strip conveniently located on the
heat sink and install it across terminals #1 and #2 on the hose heat SSR.
b)
Maintaining hose temperature
now requires manual adjustment
of the hose heater power set.
Adjust the control to maximum
(clockwise) for initial warm up
and then adjust as required to
maintain the hose temperature.
Figure 20. Terminal Jumper Strip
WARNING:
T
HE TERMINAL JUMPER MUST NEVER BE USED ON EITHER PRIMARY HEATER
SSR.
T
HIS WILL RESULT IN COMPLETE LOSS OF CONTROL AND CAUSE DAMAGE TO THE EQUIPMENT
OR SERIOUS BODILY INJURY
.
9.
The purpose of the hose heater is not to add heat but rather to maintain the
temperature developed by the primary heater. If conditions indicate that the hose
heater is not maintaining temperature during flow (Amber Hose Heat Controller light
on the console stays lit continuously), check that the primary heater and hose heater
controllers are set for the same temperature or reduce the output.
10.
The hose heater operates at 220 Volts. Low line voltage will significantly reduce
power available and the heater will not perform to its full capability
11.
When checking for improper electrical isolation, remember that the electrical
connection of the low voltage hoses is in series, and that the hose fittings make the
electrical connection between hoses. Thus, If the Resin fittings contact the
Isocyanate fittings, all hoses from the point of contact out to the gun will be “cold”
while those hoses back to the proportioning unit will be heated. This can occur if
there was no electrical isolator installed between them, or if the isolator has slipped
out of position. If this occurs, it is a matter of finding where the fittings are in
contact and isolating them.
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