Page 1
DEMA SPRAY FOAM MODEL 294C
D
EM
A
INSTALLATION INSTRUCTIONS
1. PARTS
A. Foamer assembly.
B. Plastic supply tubing w/strainer.
C. Outlet hose 3/4" ID x 25'long (optional)
D. Shutoff valve (optional)
E. Drum protector disc.
2. INSTALLATION
A. Water inlet is 3/4" garden hose swivel. It may
be removed if attaching to 1/2" pipe.
B. Air inlet is 1/4" NPT.
C. Foam outlet is 3/4" garden hose. Connect
shutoff valve to end of hose. See Table 1 for
hose limitations.
D. Detergent may be drawn directly from any size
container which usually is set on the floor. Use
the plastic tubing for connecting to the injector
barb, first cutting to desired length and
dropping the end with the strainer into the
container. The drum protector disc may be
twisted at the slit to attach to the tubing at the
bung opening.
WARNING: Use care when handling hazardous chemicals.
METERING SCREW
DETERGENT INLET
TABLE 1
MIN. PRESSURES HOSE SIZE
& LENGTH
25’ OF 3/4” ID 40 PSI 40 PSI
50’ OF 3/4” ID 50 PSI 40 PSI
25’ OF 1/2” ID 60 PSI 40 PSI
3. OPERATION
Open shutoff valve at end of hose. Turn on air supply; set pressure at 40 PSI. Turn on water supply.
4. ADJUSTMENT
Adjust detergent feed rate by turning recessed screw in square knob to the left, which will increase the rate to the
maximum shown in Table 2. To increase dryness of foam, raise air pressure 5 PSI. Repeat is necessary. See Table 3
for water and air flows.
WATER AIR
VISCOSITY CPS
MAX. OZ/GAL.
PRESSURE PSI
WATER FLOW
GPM
AIR FLOW SCFM
5. SERVICING
CAUTION: Turn off air and water supplies before servicing.
If flow surges and unit fails 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.
I-144 Pg. 1 of 4
Rev. B-37102 7/29/11
WATER INLET
PRESSURE REGULATOR
AND GUAGE
AIR INLET
FOAM OUTLET
TABLE 2
1 75 220 500
27 13 10 9
TABLE 3
40 50 60 80
1.4 1.6 1.7 2.0
3.5 4.2 4.8 6.1
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DEMA SPRAY FOAM MODEL 294C
INSTALLATION INSTRUCTIONS
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 the foot strainer clogged? Lift from drum and clean.
B. Is the detergent check valve clogged? Remove the 4 screws in the square kn ob. Remove knob to inspect and
clean check valve ball, spring and o-ring.
CAUTION: When servicing be sure that replacement parts have been installed according to drawing. Be
certain to check valve parts are in place.
RETURNS: NO MERCHANDISE MAY BE RETURNED FOR CREDIT WITHOUT DEMA’S
WRITTEN PERMISSION. RETURN MERCHANDISE AUTHORIZATION NUMBER
REQUIRED IN ADVANCE OF RETURN.
WARRANTY:
Defective units or parts should be returned to the factory with transportation prepaid. If
DEMA products are warranted against defective material and workmanship under normal use and
service for one year from the date of manufacture. This limited warranty does not apply to any
products which have a normal life shorter than one year or failure and damage caused by
chemicals, corrosion, improper voltage supply, physical abuse, or misapplication. Rubber and
synthetic rubber parts such as “o”- rings, diaphragms, squeeze tubing and gaskets are considered
expendable and are not covered under warranty. This warranty is extended only to the original
buyer of DEMA products. If products are altered or repaired without prior approval of DEMA,
this warranty will be void.
inspection shows them to be defective, they will be repaired or replaced without charge, F.O.B.
factory. DEMA assumes no liability for damages. Return merchandise authorization number, to
return units for repair or replacement, must be granted in advance of return.
I-144 Pg. 2 of 4
Rev. B-37102 7/29/11
Page 3
DEMA SPRAY FOAM MODEL 294C
INSTALLATION INSTRUCTIONS
2
1
3
4
5
6
19
7
14
15
16
17
18
20
13
8
9
24
10
11
12
ACCESSORY
29
23
25
26
28
21
22
27
I-144 Pg. 3 of 4
Rev. B-37102 7/29/11
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DEMA SPRAY FOAM MODEL 294C
INSTALLATION INSTRUCTIONS
NO
10
11 I I I I I I 93-29 SPRING
12 I I I I I I 93-28 RETAINER SCREW
13
14 I I I I I I 25-29 METERING KNOB O-RING
15
16
17
18
19
20
21 X X I X X X 93-14 ¾” I.D. X 25’ LG. OUTLET HOSE
22 I I I I I I 23-7 MACHINE SCREW (4 REQ’D)
23
24
25
26 X X I X X X 90-15 OUTLET SHUTOFF VALVE
1 I I I I X X 93-1 PRESSURE REGULATOR
2 I I I I X X 93-2 PRESSURE GAUGE
3 I I I I I I 93-31 ADAPTER
4
5 I I I I I I 93-6 AIR CHECK VALVE SPRING
6 I I I I I I 21-8 AIR CHECK VALVE O-RING
7 I I I I I I 93-32 FOAMER BODY
8 I I I I I I 24-8-8S WATER NOZZLE W/ O-RING
9 I I I I I I 34-1 INLET HOSE ADAPTER
MODEL NUMBER
294 C
294CS
294C-1
294C-SJ
294C-SJ-2
294C-SJ-3
PART NUMBER DESCRIPTION
I I I I I X 93-30-1V
X X X X X I 24-24S
I I I I I X 93-30-2
X X X X X I 30-2
I I I X X X 24-63
X X X I I I 24-62
I I I X X X 23-34-3
X X X I I I 24-34-7
I I I X X X 23-9
X X X I I I 24-23
I I I X X X 23-10
X X X I I I 24-24P
I I I X X X 23-11
X X X I I I 24-25
I X I X X X 23-32
X I X X X X 23-32S-2
X X X I I I 24-32
I I I X X X 23-24
X X X I I I 100-24
I I I X X X 100-12L
X X X I I I 100-12
I I I X X X 61-107
X X X I I I 61-107-2
I I I X X X 24-11L
X X X I I I 24-11MP
BALL, ¼” DIA.
BALL 5/16” DIA.
CHECK VALVE REPAIR KIT
CHECK VALVE CORE
CHECK VALVE SPRING
CHECK VALVE BALL
CHECK VALVE O-RING
METERING KNOB W/ METERING SCREW
AND O-RING
METERING SCREW W/ O-RING
½” O.D. VINYL TUBING X 8’ LG.
CERAMIC WEIGHT
FOOT STRAINER
I=INCLUDED
X=OMIT
ACCESSORIES
NO. PART NO. DESCRIPTION
27 93-17-4
28 93-24 NOZZLE W/ SOLID STREAM (SUPPLIED)
29 93-25 NOZZLE W/ 40 DEG. ANGLE
I-144 Pg. 4 of 4
Rev. B-37102 7/29/11
4’ LG SPRAY WAND W/ SOLID STREAM
NOZZLE
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