DEMA 294CTDM User manual

I-145 Pg. 1 of 3
Rev. A0600
DEMA SPRAY FOAM MODEL 294CTDM
INSTALLATION INSTRUCTIONS
1. PARTS
A. Foamer assembly
B. Plastic tubing with strainer and ceramic weight
C. Metering Tips (specified on order)
D. Outlet hose 3/4" ID x 25' lg. (optional)
E. Shutoff valve (optional)
2. INSTALLATION
A. Mounting: Attach plastic tubing to detergent inlet barbandslide
ceramic weight over tubing.
B. Water inlet is 3/4" garden hose swivel.
C. Air inlet is 1/4" NPT
D. Foam outlet is 3/4" garden hose. Connect shutoff valve to end
of hose. See Table 1 for hose limitations.
3. OPERATION
WARNING: USE CARE WHEN HANDLING
HAZARDOUS CHEMICALS.
Open shutoff valve at end of hose. Turn on air
supply; set pressure at 40 psi. Turn on water supply.
4. ADJUSTMENT
Chemical feed rates are controlled bymetering tips screwed into the detergent inlet barb. Tips are identified bynumber or color. Other
tips are available from Dema (Part No. 61-9-specifysize). To increase dryness of foam, raise air pressure 5 psi. Repeat if necessary.
5. SERVICING
CAUTION: TURN OFF AIR AND WATER SUPPLIES BEFORE SERVICING
If flow surges and unit fails to make foam:
A. Is the outlet hose too small or too long?
B. Is there sufficient water and air pressure? At least 30 psi is requried.
C. Does detergent contain a foaming agent?
D. Is the foamer outlet attached to a manifold with too few or too small nozzles? They should have a combined water rating of 20
G.P.M. @ 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 knob. Remove knob to inspect and clean check
valve ball, spring, and o-ring.
C. Is the metering tip clogged? Remove from inlet barb and clean.
DEMA SPRAY FOAM MODEL 294CTDM
INSTALLATION INSTRUCTIONS
Table 1
Minimum PressuresHose Size and
Length Water Air
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
Table 2
Viscosity (cps) 175 200 500
Maximum
(Oz/Gal) 34.3 20.4 10.5 6.5
Table 3
Pressure
(psi) 40 50 60 80
Water
Flow
(G.P.M.)
1.4 1.6 1.7 2.0
Air Flow
(SCFM) 3.5 4.2 4.8 6.1

I-145 Pg. 2 of 3
Rev. A0600
Table 4
Induction Rates for Viscosities Shown
1 cps 75 cps 200 cps 500 cps
Metering Tip
Color
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
Clear 0.84 152-1 0.65 197-1 0.45 284-1 0.30 427-1
Purple 1.35 95-1 1.10 116-1 0.90 142-1 0.60 213-1
Yellow 2.40 53-1 2.00 64-1 1.50 85-1 1.10 116-1
Green 4.20 30-1 3.40 38-1 2.65 48-1 2.10 61-1
Pink 5.25 24-1 4.50 28-1 3.45 37-1 2.60 49-1
Turquoise 9.40 14-1 7.25 18-1 5.45 23-1 3.70 35-1
Black 11.75 11-1 8.80 15-1 6.35 20-1 4.20 30-1
Gray 14.50 9-1 10.80 12-1 7.75 17-1 4.75 27-1
Red 18.00 7-1 13.20 10-1 8.30 15-1 5.00 26-1
Blue 20.60 6-1 14.70 9-1 8.65 14.8-1 5.20 25-1
Brown 24.10 5-1 16.15 8-1 9.30 14-1 5.50 23-1
White 27.50 4.7-1 17.80 7-1 9.70 13-1 5.70 22-1
Orange 30.00 4.3-1 18.50 6.9-1 10.10 12.7-1 5.85 21.9-1
Lt. Blue 32.00 4-1 18.90 6.8-1 10.20 12.5-1 6.00 21-1
Tan 32.50 3.9-1 19.25 6.6-1 10.40 12.3-1 6.25 20.5-1
None 34.25 3.7-1 20.45 6-1 10.60 12-1 6.50 20-1
All induction rates are based on 40 psi water pressure and 40 psi air pressure.
RETURNS: NO MERCHANDISE MAY BE RETURNED FOR CREDIT WITHOUT DEMA’S WRITTEN PERMISSION.
RETURN MERCHANDISE AUTHORIZATION NUMBER REQUIRED IN ADVANCE OF RETURN.
WARRANTY: DEMA products are warrantedagainstdefective material and workmanship under normal use andservice for oneyear fromthe
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 bychemicals, corrosion, improper voltage supply, physical abuse, or misapplication. Rubber and
synthetic rubber parts such as “o”- rings, diaphragms, squeeze tubing and gaskets are consideredexpendableandarenotcovered
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.
Defective units or parts should be returned to the factorywith transportation prepaid. If inspection shows them to be defective,
theywill be repaired or replaced withoutcharge, F.O.B. factory. DEMA assumes no liabilityfor damages. Returnmerchandise
authorization number, to return units for repair or replacement, must be granted in advance of return.

PART N0.
93-30-1V
93-1
93-2
93-6
93-14
93-28
93-29
93-31
93-32
93-45
100-12LS
93-24
93-17-4
93-25
93-38
93-30-2
23-34-3 CHECK VALVE CORE
WATER NOZZLE W/ O-RING
FOOT STRAINER
METERING KNOB O-RING
INLET HOSE ADAPTER
METERING TIP-SPECIFY COLOR (294CDMT ONLY)
OUTLET SHUTOFF VALVE
BALL 5/16" RUBBER
CERAMIC WEIGHT
STAINLESS STEEL BALL 1/4" (294CDMT ONLY)
CHECK VALVE REPAIR KIT
24-8-8S
24-11L
25-29
34-1
61-9
90-15
30-2V
61-107-1
24-24S
24-63
AIR CHECK VALVE O-RING
MACHINE SCREW (4 REQD)
CHECK VALVE SPRING
CHECK VALVE BALL (9/32 DIA STNLS. STL.)
CHECK VALVE O-RING
23-26CDM
METERING SCREW W/ O-RING (294CDM ONLY)
METERING KNOB & BUNG ASSEMBLY (294 CDM ONLY)
23-26CTDM
METERING KNOB & BUNG ASSEMBLY (294 CDM ONLY)
PART N0.
21-8
23-7
23-9
23-10
23-11
23-24
23-26CTDM
23-26CDM
DESCRIPTION
61-9
23-7
93-45
ADAPTER
4' LG. SPRAY WAND W/ SOLID STREAM NOZZLE
STAINLESS STEEL BALL 5/16" (294CDMT ONLY)
ACCESSORIES
NOZZLE W/ SOLID STREAM (SUPPLIED)
1/2" OD VINYL TUBING X 8'3 1/2' LG.
NOZZLE W/ 40° ANGLE
FOAMER BODY
SNAP RING
DESCRIPTION
PRESSURE REGULATOR
PRESSURE GAGE
AIR CHECK VALVE SPRING
3/4" ID X 25' LG. OUTLET HOSE
RETAINER SCREW
BALL 5/16" DIA
BALL 1/4 DIA
SPRING
93-17-4
ACCESSORY 93-24
93-25
SPRAY FOAM-MODEL 294 CDM & 294CTDM
24-24S
34-1
24-8-8S
93-14
23-24
23-9
23-10
23-11
25-29
23-34-3
93-32 21-8
93-6
93-31
93-30-1V
93-1
93-29
90-15
93-30-2
61-107-1
93-38
93-28
100-12LS
24-11L
93-2