DEMA
®
MODEL 294DC FOAMER & 294DC-DS
DROP STATION FOAMER
INSTALLATION INSTRUCTION
Form I-739 Page 4 of 7
Rev. F-40211
POSSIBLE SITUATIONS
SITUATION CAUSE
SOLUTION
1
Chemical tube not immersed in chemical
or chemical depleted.
Immerse tube in chemical or replace.
2
Air pressure is too high for water.
Adjust air regulator down.
3
Water pressure is too low.
At least 30 psi is required. Increase if possible, or decrease air
pressure.
4
Chemical to water ratio is too low.
Change metering tip to one that is larger.
5
Foam hose is kinked.
Straighten hose.
6
Foam hose is too long or wrong size.
See table 1.
7
Air supply is inadequate.
Increase air pressure by regulating up.
8
Detergent is wrong.
Use a more effective detergent, and be sure that product is
recommended for foaming.
9
Using oil on the airline may deteriorate the
quality of the foam.
Use only clean, dry air.
10
Holes or cuts are in chemical inlet tube.
Replace the tube.
11
Strainer and/or metering tip is blocked.
Remove, clean or replace.
12
Solution check valve is not working.
Remove, clean or replace.
13
Air regulator is not working.
Remove, clean or replace.
14
Soil has hardened on surface.
Reapplication may be necessary. Be sure to rinse foam off
before it dries.
15
Rust or build-up is clogging the foamer
aspirator.
Disconnect water from unit and visually inspect. Remove
blockage.
16
Water scale or chemical build-up may
have formed in the water jets.
Place the chemical tube in descaling acid and completely open
the shut-off valve. Let unit run until the chemical tube is fill
with acid, then close the shut-off valve and water supply.
Elevate the chemical tubing and outlet hose until acid has had
enough time to descale. Repeat if necessary. For severe
cases, disassemble unit and soak foamer body in descaling
acid.