User guide
Dow Building Solutions
9.4 System Pressurization
1. Open the nitrogen bottle valve by turning the knob
on top of the cylinder counter-clockwise. If a hissing
sound occurs, further tighten the nitrogen regulator
valve stem with an adjustable wrench.
2. Verify that nitrogen cylinder pressure using the center
gauge of the nitrogen regulator assembly. The system
WILL NOT operate efficiently if the pressure falls below
500 psi. If below 500 psi, replace the nitrogen cylinder.
3. Turn the left regulator stem clockwise to the proper
pressure setting of the “A” tank (120160psi – Do not
go over 225psi). If a hissing sound occurs, further
tighten the yellow-coded nitrogen line connection to
the nitrogen regulator assembly and/or the nitrogen
intake connection on the “A” tank using an adjustable
wrench. If the left gauge fails to indicate a pressure
setting, contact your Dow Sales Representative.
4. Turn the right regulator stem clockwise to the proper
pressure setting of the “B” tank (120160psi – Do not go
over 225psi). If a hissing sound occurs, further tighten the
yellow-coded nitrogen line connection to the nitrogen
regulator assembly and/or the nitrogen intake valve
connection on the “B” tank using an adjustable wrench.
If the right gauge fails to indicate a pressure setting,
contact your Dow Sales Representative.
5. Slowly open the nitrogen intake valve of each tank.
The valve handles should be parallel with the nitrogen lines.
6. Slowly turn on the chemical valve of each tank and the on-off
valve of each chemical line. The valve handles should be
parallel to the chemical lines. Verify that the filter connection
of each tank is tight and that no chemical leaks are present.
9.5 System Purging and Testing
1. Dispense chemicals in an appropriate container.
This is to verify proper chemical flow.
2. Clean any chemical from the INSTAFLO™ Gun face
using a rag.
3. Insert an unused nozzle with the key slot down. Push in
firmly until the nozzle ejector is seated over the back rim of
the nozzle.
4. Dispense foam to verify proper chemical mixing. If improper
mixing or poor foam quality, refer to the Troubleshooting
section, Section 10 of this manual.
Section 10
Troubleshooting
The FROTHPAK™ Refill System is virtually maintenance-free and
many problems can be corrected through simple troubleshooting
techniques. When troubleshooting, confirm that the system is pressur-
ized correctly, and that all nitrogen and chemical valves are in the open
position. One closed valve can cause a system shut-down.
10.1 Temperature
Chemical temperature can affect foam quality. If the chemical tem-
perature is below 65
°F (18°C), poor quality foam may result. The ideal
temperature range is 70
°-90°F (21°-32°C).
10.2 Foam Color and Quality
Changes in foam quality indicate an off-ratio foam. If the foam is crusty
after curing, the foam is “A” rich and a blockage of “B” chemical exists.
If the foam is mushy, and remains soft after two minutes, the foam is “B”
rich and a blockage of “A” chemical exists.
To identify and correct the problem, initiate the following procedure:
1. DO NOT breathe vapor or spray. Proper PPE and ventilation
are required. See product SDS and Section 2 of this manual
for further information. Follow all precautions for product.
2. Remove the used nozzle by pushing down the nozzle
ejector. Use only in well ventilated areas. With insuf-
ficient ventilation, wear suitable respiratory protection.
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