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 barb and slide
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 by metering tips screwed into the detergent inlet barb. Tips are identified by number or color. Other
tips are available from Dema (Part No. 61-9-specify size). 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 Pressures
Hose 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)
1
75
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
