Startup of Heated Units
24 311075R
Heating Foam Resins with
245 fa Blowing Agents
New foam blowing agents will froth at tempera-
tures above 90°F (33°C) when not under pres-
sure, especially if agitated.
Never fill the 7 gal. (26 l) supply tanks beyond
the 5 gal. (19 l) line on the tanks, to leave room
for some frothing.
At High Ambient Temperature (above
75°F/24°C)
• Pour resins slowly to avoid frothing.
• Only use Slow Recirc , to avoid heating
and agitating the tank. If temperature
doesn’t keep up, set function knob to
Stop/Park , then set to Slow Recirc
again.
• When you stop to refill the tanks, avoid boil-
ing off fluid in the heaters by following these
steps:
a. Shut off Heater Power.
b. Leave hoses under pressure.
c. Fill tanks, page 19.
d. Set Recirc/Spray valves to Recirc.
e. Set function knob to Slow Recirc .
f. Turn on Heater Power.
At Cool Ambient Temperature (below
75°F/24°C)
• Use Fast Recirc to heat tanks to
75-90°F. (24-32°C), then use Slow Recirc
to raise hose and gun to desired spray
temperature.
• If the top of the resin in tank starts frothing,
do not use Fast Recirc any more.
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