DEMA 294CDF Installation Instructions

1. PARTS
A. Foamer assembly
B. 2 pcs. plastic supply tubing with strainer
*C. Outlet hose ¾" ID x 25' lg.
*D. Shutoff valve
*Optional
2. INSTALLATION
A. Water inlet is ¾" garden hose swivel. It may be removed if
attaching to ½" pipe.
B. Air Inlet is ¼" NPT female pipe.
C. Foam outlet is ¾" garden hose. See Table 1 for hose
limitations.
D. Detergent may be drawn directly from any size container
which is usually set on the floor. Use the plastic tubing for
connecting to the injector barbs. First cut to desired length
and then drop the end with the strainer into the container.
HOSE SIZE AND
LENGTH
25' of 3/4" ID
50' of 3/4" ID
25' of 1/2" ID
3. OPERATION
Open shutoff valve at end of hose. Turn on air supply. Set pressure at 40 PSI. Turn on water supply.
4. ADJUSTMENT
WARNING: Use care when handling hazardous chemicals. Adjust detergent feed rate by turning recessed screws in the square
knobs. Turning to the left increases the rate to the maximums shown in Table 2. To increase dryness of foam, raise air pressure 5
PSI. Repeat if necessary. See Table 3 for water and air flows.
5. SERVICING
CAUTION: Turn off air and water supplies before servicing.
If flow surges and unit falls to make foam:
A. Is the metering screw backed off?
B. Is the outlet hose too small or too long?
C. Is there sufficient water and air pressure? At least 30 PSI is required.
D. Does the detergent contain a foaming agent?
E. Is the foamer outlet attached to a manifold with too few or too small nozzles? They should have a combined water rating of
20 GPM @40 PSI.
If unit stops operating:
A. Is a foot strainer clogged? Lift from drum and clean.
B. Is a detergent check valve clogged? Remove the 4 screws in a square knob. Remove knob to inspect and clean check valve
ball, spring and o-ring.
CAUTION: When servicing unit be sure that replacement parts have been installed according to drawing. Be certain check valve
parts are in
place.
I-148
Rev. A0500
DEMA SPRAY FOAM MODEL 294CDF
(DUAL FEED, LINE PRESSURES)
INSTALLATION INSTRUCTIONS
MIN. PRESSURES
WATER AIR
40 PSI 40 PSI
50 PSI 40 PSI
60 PSI 40 PSI
TABLE 1
WATER INLET
METERING SCREW
DETERGENT INLET
FOAM OUTLET
FIGURE 1
VISCOSITY CPS
MAX. OZ/GAL.
PRESSURE PSI
WATER FLOW GPM
AIR FLOW SCFM
AIR INLET
PRESSURE REGULATOR
AND GUAGE
1 75 220
33 31 28
TABLE 2
40 50 60
1.4 1.6 1.7
3.5 4.2 4.8
TABLE 3
Pg. 1 of 3
500
24
80
2.0
6.1