Dema 681-5AG Installation Manual

DEMA 681-5AG BLEND CENTER

INSTALLATION INSTRUCTIONS

I. PARTS

A. 1 pc. Blend center assembly.
B. 5 pc. 1/4 in. I.D. or 3/8 in. I.D. x 8 ft. long vinyl supply

tubing, foot valve and ceramic weight.

C. 1 pc. 9/16 in. I.D. x 20 ft. long vinyl outlet tubing.

II. INSTALLATION: Note: All installations m ust conf orm to local plumbing c odes and use appr oved backf low preventer s.

Pressure indicating tee is to be installed with existing faucets according to local plumbing codes in the state of Wisconsin
and any other sta te that requires the use of a pressure indicating tee.

A. Mounting and water supply:

Remove Blend Center lid and hold unit in position to locate the mounting screw positions. Install the mounting screws; leaving
approximately 1/8 in. extension between the wall and screw head. Mount the Blend Center by inserting the screw heads thro ug h
the key hole slots in the base and tighten th e screws (See Figure 1). The water inlet is equipped with a fem ale garden hose f itting
(with strainer washer) for attaching a water supply hose. The fitting may be removed to permit direct connection to a 3/8 i n. NPT
pipe. The unit is designed so water can be supplied to either side by interchanging the pipe plug and the female hose fitting.

B. Pressure Indicating Tee Installation:

Screw female quick disconnect to faucet and attach pressure indicating tee to female quick disconnect. Attach female end of
reinforced hose to male threads of tee, th en attach th e m ale end to the female garden hose fitting at th e wat er inlet of the Blend
Center (See Figure 3). Water supply should not exceed 125 psi and water temperature must not exceed 160°F.

D. 2 pc. #8 pan head 3/4 in screws & anchors.
E. 1 pc. label card.
F. 1 pc. Metering tip kit (3/8 in.: 61-9K) (1/4 in.: 100-

15K)

C. Chemical supply:

Place the chemical containers in a convenien t location not m ore than 6 ft. below the blend center (g rea te r l if t s w il l re d uc e i nj ect io n
capacities) . Inser t the vinyl supply tubing with the foot valve ends into the chemical container s. Cut the vinyl tubes to any
convenient length that will allow them to extend from the bottom of the chemical container to the proportioner inlet barbs. (See
figure 1). Gummed labels are provided for product labeling.

D. Outlet:

Cut the 9/16 in. I.D. outlet tubing to the desired lengths and attach them to the proportioner outlets. Longer lengths may be u sed
up to 10 ft. The 7 in. long tubing must be left on the 1 GPM proportioner to insure priming.

E. Chemical injection adjustment:

1. Dilution Control: Chemical feed rate s are controlled by metering tips screwed into the proportioner bar b s. Select a tip for
each barb using Tables 1-4 as guide.

2. Viscosity 1 cps (centipoise) is equal to the viscosity of water, 75 cps is approximately equal to the viscosity of 10 weight
motor oil, and 200 cps is approximately equal to the viscosity of most dishwashing detergents.

III. OPERATION

The Blend Center is now ready for use. Dep ressing a p ush button opens the valve, allowing water to flow through the chemical
proportioner that mixes chemical at the desired rate. The buttons are spring loaded to prevent accidental overflow if unattended, but ma y
be converted to locking buttons by cutting off the tab at the notch. (See Figure 2) Pushing the button and tubing it 1/4 turn clockwise at
the end of its travel a llows the valve to lock on. This makes it unnecess ary for the attendant to hold the button in while filling large
containers. Turning the button in a counter clockwise direction will release it, allowing the valve to shut off.

IV. SERVICING

A. Proportioner fails to draw chemical.

1. Pinch outlet tube to create back pressure which will cause unit to prime. The foot valve will keep the inlet tube pr imed.

2. Insufficient water supply pressure. 20 p si. is the minimum allowable.

B. Proportioner stops drawing chemical.

1. Inspect foot valve for dried chemical or dirt. Soak in hot water to clean.

2. Propor tioner metering tip clogged with dr ied chemical. Remove tip and tr y injecting hot water to clea r interior passages .

C. Proportioner continues to draw chemical after water valve closes.

Chemical supply is higher than bottom of discharge tube creating a natural siphon. Lower the c hemical supply or hang up outlet
tubing after use.

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DEMA 681-5AG BLEND CENTER

INSTALLATION INSTRUCTIONS

D. Valve malfunction

Check that the button moves freely up & down and that a "click" can be heard when the button is pushed and released, indicating t hat
the magnet is activating the plunger properly. Remove cover. To inspect internal parts, unscrew magnet housing and carefully pull
off the enclosing tube so as not to drop the plunger, kick-off spring, and spacer. Check for dirt of damage impending plunger and
kick-off spring movement. Inspect the diaphragm, making sure the two small pin holes (bleed holes) in the diaphragm convolution
are clear to allow the valve to close.

Caution: When servicing unit, be sure that replacement parts have been installed according to drawing.

Metering Tip

* Metering tip color was formerly clear. Leaner dilutions can be achieved by ordering DEMA ultra lean metering tip kit 100-15KU.

Metering Tip

Clear 1.40 91-1 1.00 128-1 0.85 151-1
Purple 2.15 60-1 1.75 73-1 1.40 91-1
Yellow 4.00 32-1 3.25 39-1 2.80 46-1
Green 6.70 19-1 5.40 24-1 4.50 28-1
Pink 8.70 15-1 7.00 18-1 5.60 23-1
Turquoise 14.15 9-1 11.15 11-1 8.15 16-1
Black 17.25 7-1 13.50 9-1 10.00 13-1
Gray 22.60 6-1 16.75 8-1 11.60 11-1
Red 25.15 5-1 19.50 7-1 13.50 10-1
Blue 27.50 4.7-1 21.65 6-1 14.25 9-1
Brown 31.00 4-1 24.25 5-1 15.60 8-1
White 33.50 3.8-1 26.25 4.9-1 16.70 7.7-1
Orange 35.40 3.6-1 28.00 4.6-1 17.40 7.4-1
Lt. Blue* 36.50 3.5-1 29.00 4.4-1 18.20 7-1
Tan* 37.80 3.4-1 29.90 4.3-1 18.65 6.9-1
No Tip 38.30 3.3-1 30.90 4.1-1 21.30 6-1

Note: All induction rates are based on a water pressure of 40 psi. * The se tips are not included in standard tip pack.

.

TABLE 1 - 164 AG (1 GPM flow rate proportioner - 1/4 in. barb and tubing)

Injection Rates For Viscosities Shown

Color

Oz./Gal. Ratio Oz./Gal. Ratio Oz./Gal. Ratio

Tan 1.25 102-1 0.90 142-1 0.60 213-1

Orange 1.70 75-1 1.20 107-1 0.80 160-1

Turquoise 2.15 60-1 1.55 83-1 1.10 116-1

Pink 3.00 43-1 2.00 64-1 1.50 85-1

Light Blue* 3.90 33-1 2.75 47-1 1.80 71-1

Brown 4.55 28-1 3.00 43-1 2.00 64-1

Red 5.80 22-1 3.60 36-1 2.30 56-1
White 7.00 18-1 4.45 29-1 2.70 47-1
Green 7.90 16-1 5.00 26-1 3.00 43-1

Blue 9.80 13-1 5.75 22-1 3.30 39-1

Yellow 14.80 9-1 7.35 17-1 3.55 36-1

Black 20.15 6-1 8.50 15-1 3.70 35-1

Purple 27.80 5-1 9.80 13-1 3.80 34-1

Gray 31.60 4-1 10.50 12-1 3.90 33-1

No Tip 35.70 3.6-1 11.80 11-1 4.50 28-1

TABLE 2 - 164 AG (1 GPM flow rate proportioner - 3/8 in. barb and tubing)

Color

1 cps 75 cps 200 cps

Injection Rates For Viscosities Shown

1 cps 75 cps 200 cps

Oz./Gal. Ratio Oz./Gal. Ratio Oz./Gal. Ratio

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DEMA 681-5AG BLEND CENTER

Injection Rates For Viscos

ities Shown

Injection Rates For Viscosities Shown

INSTALLATION INSTRUCTIONS

TABLE 3 - 163 AG (4 GPM flow rate proportioner - 1/4 in. barb and tubing)

Metering Tip

Color

Tan 0.30 427-1 0.20 640-1 0.15 853-1
Orange 0.40 320-1 0.30 427-1 0.25 512-1
Turquoise 0.60 213-1 0.40 320-1 0.30 427-1
Pink 0.80 160-1 0.50 256-1 0.40 320-1
Light Blue* 1.00 128-1 0.70 183-1 0.45 284-1
Brown 1.20 107-1 0.80 160-1 0.50 256-1
Red 1.50 85-1 0.90 142-1 0.60 213-1
White 1.85 69-1 1.10 116-1 0.70 183-1
Green 2.00 64-1 1.25 102-1 0.80 160-1
Blue 2.50 51-1 1.50 85-1 0.82 156-1
Yellow 4.00 32-1 1.85 69-1 0.90 142-1
Black 5.50 23-1 2.00 64-1 0.94 136-1
Purple 8.80 15-1 2.40 53-1 0.96 133-1
Gray 11.65 11-1 2.50 51-1 1.00 128-1
No Tip 16.20 8-1 3.00 43-1 1.20 107-1

* Metering tip color was formerly clear. Leaner dilutions can be achieved by ordering DEMA ultra lean metering tip kit 100-15KU.

TABLE 4 - 163 AG (4 GPM flow rate proportioner - 3/8 in. barb and tubing)

Metering Tip

Color

Clear 0.90 142-1 0.30 427-1 0.20 640-1
Purple 1.10 116-1 0.50 256-1 0.40 320-1
Yellow 1.80 71-1 1.00 128-1 0.70 183-1
Green 2.50 51-1 1.50 85-1 1.20 107-1
Pink 3.00 43-1 2.00 64-1 1.50 85-1
Turquoise 4.50 28-1 3.15 41-1 2.30 56-1
Black 4.80 27-1 3.75 34-1 2.80 46-1
Gray 6.70 19-1 4.80 27-1 3.35 38-1
Red 8.15 16-1 5.80 22-1 3.80 34-1
Blue 9.20 14-1 6.60 19-1 4.20 30-1
Brown 11.10 12-1 7.75 17-1 4.70 27-1
White 13.20 10-1 9.15 14-1 5.00 26-1
Orange 15.00 9-1 10.10 13-1 5.30 24-1
Lt. Blue* 16.70 8-1 11.10 12-1 5.50 23-1
Tan* 18.50 7-1 11.80 11-1 5.80 22-1
No Tip 19.40 6.6-1 13.00 10-1 6.20 21-1

Note: All induction rates are based on a water pressure of 40 psi. * The se tips are not included in standard tip pack.

RETURNS: NO MERC HANDISE MAY BE RETURNED FOR CR EDIT WITHOUT DEMA’S WRITTEN P ERMISSION.

RETURN MERCH ANDISE AUTHORIZATION NUMBER REQUIRED IN A DVANCE OF RETURN.

Oz./Gal. Ratio Oz./Gal. Ratio Oz./Gal. Ratio

Oz./Gal. Ratio Oz./Gal. Ratio Oz./Gal. Ratio

1 cps 75 cps 200 cps

1 cps 75 cps 200 cps

WARRANTY: DEMA products are warr anted 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 f ailure 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.

Defective units or parts should be returned to the factory with transportation prepaid. If 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.

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DEMA 681-5AG BLEND CENTER

INSTALLATION INSTRUCTIONS

FIGURE 1

FIGURE 2

PRESSURE INDICATING TEE INSTALLATION

PRESSURE

INDICATING

CHEMICAL INLET TUBING

OUTLET TUBING

TEE

BLEND CENTER

WATER INLET HOSE

DETAIL OF PRESSURE

INDICATING TEE

FIGURE 3

WATER INLET HOSE

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DEMA 681-5AG BLEND CENTER

INSTALLATION INSTRUCTIONS

NO. PART NO. DESCRIPTION

1 66-139 MAG NET HOUSING
2 66-140 PUSH BUTTON
3 63-35 MAGNET
4 63-36 SPRING
5 41-7-25 ENCLOSING TUBE
6 63-87 VALVE REPAIR KIT
7 63-37 SPACER
8 41-1-8 KICKOFF SPRING
9 63-38 PLUNGER
10 41-15-10 DIAPHRAGM, EP
11 63-39 VAL VE BODY
12 100-38 STRAINER WASHER
13 93-44 PIPE TO GA RDEN HOSE

ADAPTOR
14 66-31 CLOSE NI PPLE
15 66-153 PIPE PLUG ASSY
16 16-30 ACTION GAP ASSY
17 61-22GAP-2 4 GPM PROPORTIONER (WHITE)
18 61-99GAP-2 1 GPM PROPORTIONER (GREEN)

NO. PART NO DESCRIPTION

19 61-21 ½” ID X 6’ LONG VINYL OUTLET

TUBE (4 GPM)

20 16-3-6 1/3” ID X 6’ LONG VINYL

OUTLET TUBE (1 GPM)
21 63-78 O-RING EP
22 63-79 INLET BARB (1/4”)
23 63-80 INLET BARB (3/8”)
24 100-15K METERING TIP KIT (1/4” BARB)
25 61-9K METERING TIP KIT (3/8” BARB)
26 100-12 ¼” ID X 8’ LONG VINYL SUPPLY

TUBING
27 61-107-2 CERAMIC WEIGHT FOR ¼”

TUBING
28 61-107 CERAMIC WEIGHT FOR 3/8”

TUBING
29 100-16E-1 FOOT VALVE
30 68-6-QD2 PRESSURE INDICATI NG TEE
31 61-25-2 FRESH WATER OUTLET KIT

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