Operation
311075ZAB
23
6. Adjust the heater control knobs as necessary for a
stable spray temperature.
Heatup Guidelines
NOTE:
The fluids must be circulated from the pumps
through the heaters, hoses, and back to the tanks to
ensure warm fluids are supplied to the gun.
Slow Recirculation
•
Slow Recirc results in a higher temperature transfer
in the heater, so hoses and gun heat up quicker.
•
Good for touchup or low flow spraying, up to
moderate temperature.
•
Not used to circulate full tanks up to temperature.
•
Use with 245 fa blowing agent foams, to minimize
heat returned to tank and reduce frothing.
Fast Recirculation
•
Fast Recirc keeps heaters on fulltime to bring fluid
tanks up to temperature. The higher your usage
rate, the more heat needed in the tanks before
spraying.
-
For normal usage rates:
Use Fast Recirc to
get tanks to approximately 50°F (28°C) below
desired spray temperature, then use Slow
Recirc to raise hose and gun to desired
temperature.
-
For higher flow rates or continuous
spraying:
Use Fast Recirc to bring temperature
of tanks to approximately 20°F (11°C) below
desired spray temperature, then use Slow
Recirc to raise hose and gun to desired
temperature.
-
Volume in tanks:
Use only what you need. For
example, 2.5 gal. (10 l) in each tank will heat up
almost twice as fast as 5 gal. (20 l).
•
Mixes fluid within tanks, to avoid heating only the
fluid at the top of the tank.
•
Use for flushing.
Heat Management Tips
•
Heaters perform better with lower flow rates or
smaller mix modules.
•
Triggering the gun for short periods helps maintain
efficient heat transfer, keeping material at the
desired temperature. Triggering the gun for a long
period does not allow enough heating time, and cold
material will enter the hose.
•
If the temperature displays fall below acceptable
limits, set the function knob to Slow Recirc
and
circulate again to bring temperatures back up.
•
Each 35 ft (10.7 m) hose bundle adds about 5
minutes to heatup time with most materials.
Water-based materials take longer to heat up.
Maximum recommended hose length is 105 ft (32
m).
•
Use Fast Recirc
until the tanks are warm to the
touch, then use Slow Recirc
until the displays
read desired temperature.
Table 4: Heatup Time Guidelines for starting a cold machine with 5 gal. (19 l) per side (see Notes below)
Fluid Spray Target
Temperature
35 ft (10.7 m) Hose
(1 bundle)
70 ft (21 m) Hose
(2 bundles)
125°F (52°C)
20 minutes
25 minutes
150°F (65°C)
40 minutes
50 minutes
NOTE:
Use fast circulation until temperature is within 20 °F (11 °C) of
target, then use slow circulation to reach final temperature.
Different fluids will absorb heat at different rates. When refilling a warm
machine, heatup times will be less.
