Page 1
DEMA BLEND SAFE
MODEL 662-GAPDB
INSTALLATION INSTRUCTION
1. PARTS CHECKLIST:
A. Blend Safe Assembly B. ¼” x 28” Long Viny l Supply Tubing & Foot Valve Assy .
C. ½”ID x 6’ Long Viny l Outlet Tubing (4 GPM only) D. ½” ID X 6” Long Vinyl Outlet Tubing (1 GPM only)
E. Outlet Tubing Hanger (4 GPM only) F. Drip Tray (1 GPM only) G. Screw and Anchor Kit
H. Cabinet Lock Keys I. Hinges J. Label Card
K. Metering Tip Kit L. Ceramic Weight M. Mounting Template (I-769-2)
*Quantity varies depending on the mo del of the Blend Safe.
2. INSTALLATION: Note: All installations must conform with local plumbing codes and use approved backflow preventers.
Pressure indi cating tee is to be installed with existing faucets according to local plumbing codes in the state of Wisconsin and any
other state that requ ires the use of a pressure indica ting tee. WA RNING: Wa ter supply should not exceed 12 5 psi and water
temperature must not exceed 150°F.
A. MOUNTING AND WATE R SUPPL Y
: Use mounting template enclosed to locate the mounting screw positions. Drill all of the ho les
into the drywall using a 1/4” diameter bit for use with the included #10 screw and anchor set. (If mounting the Blend Safe to wood and
you do not plan to use the included anchors, drill 1/8” diameter holes.) Insert the anchors into drilled holes and hammer t hem i nto t he wal l
until they are flush with face of wall. Assemble all of the #10 screws with a phillips screwdriver into the anchors so the screw heads are
sticking out of the wall approximately ½”. Mount the Blend Safe by inserting the screw heads through the keyhole slots in the base and
tightening the screws. The water inlet is equipped with a female garden hose fitting (with strainer washer) for attaching a water supply
hose. The water inlet may be removed to permit direct connection to a 3/8 in. NPT pipe. The unit is designed so water can be supplied to
either side by interchanging the pipe plug with the water inlet. Note: Apply pipe dope, hand tighten, and then turn 1-½ times w i th a
wrench. DO NOT OVER TIGHTEN. WARNING: Do not use Teflon® tape to seal internal plastic threads as the extra
thickness of the tape may cause the plastic to crack. Use a non-welding liquid sealant instead. The 662 Blend Safe can
accommodate additional stations added to it. DEMA kit #66-129 is used for attaching single-station units to each ot he r an d k it #66-130 i s
used for attaching dual-station units to each other.
B. PRESSURE INDICATING TEE INSTALLATION: Screw female quick disconnect to faucet and attach pressure indicating tee to
female quick disconnect. Attach f emale end of reinforced h ose to m ale threads of tee, then attach the male end t o the f em ale garden hose
fitting at the water inlet of the Blend Center (See Figure 3).
C. CHEMICAL INJECTION ADJUSTMENT: Warning: use care when handling hazardous chemicals.Chemical f eed rates are
controlled by metering tips screwed into the proportioner barb. Select a tip using Table 1 or 2 as a guide.
1 cps (centipoise) is equal to the viscosity of water
75 cps is approximately equal to the viscosity of 10 weight motor oil
200 cps is approximately equal to the viscosity of most dishwashing detergents
TABLE 1-1 GPM FLOW RATE PROPORTIONER, 1/4” I.D. Tubing
Injection Rates For Viscosities Shown
Metering Tip Color
1 cps 75 cps 200 cps
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
Tan 1.03 125-1 0.76 168-1 0.38 333-1
Orange 1.24 103-1 0.98 130-1 0.53 241-1
Turquoise 1.43 89-1 1.07 119-1 0.61 211-1
Pink 2.47 52-1 1.58 81-1 0.92 139-1
Li ght Blue* 3.05 42-1 2.1 61-1 1.06 121-1
Brown 3.48 37-1 2.31 55-1 1.15 111-1
Red 4.38 29- 1 2.83 45-1 1.23 104- 1
White 5.33 24-1 3.1 42-1 1.37 93-1
Green 6.38 20-1 3.63 35-1 1.4 91-1
Blue 6.77 19- 1 3.78 34-1 1.45 88-1
Yellow 9.90 13-1 5.1 25-1 1.48 86-1
Black 15.00 9-1 6.54 20-1 1.53 84-1
Purple 24.94 5-1 7.28 18-1 1.57 82-1
Gray 35.94 4-1 8.5 15-1 1.64 78-1
No Tip 73.21 2-1 9.35 14-1 1.87 69-1
I-769 Pg. 1 of 5
Rev. B-36616 3/08/ 11
Page 2
DEMA BLEND SAFE
MODEL 662-GAPDB
INSTALLATION INSTRUCTION
TABLE 2 - 4 GPM FLOW RATE PROPORTIONER, 1/4” I.D. Tubing
Injection Rates For Viscosities Shown
Metering Tip Color
Tan 0.33 387-1 0.26 500-1 0.12 1090-1
Orange 0.42 307-1 0.32 430-1 0.17 735-1
Turquoise 0.51 251-1 0.34 382-1 0.19 676-1
Pink 0.78 165-1 0.56 230-1 0.3 422-1
Li ght Blue* 0.87 147-1 0.67 192-1 0.33 391-1
Brown 0.99 129-1 0.74 174-1 0.37 345-1
Red 1.37 93- 1 0.91 141-1 0.44 289-1
White 1.52 84-1 1.04 123-1 0.48 264-1
Green 1.72 74-1 1.22 105-1 0.52 244-1
Blue 2.13 60- 1 1.27 101-1 0.54 239-1
Yellow 3.05 42-1 1.71 75-1 0.56 229-1
Black 4.50 28-1 1.96 65-1 0.57 224-1
Purple 7.75 17-1 2.4 53-1 0.59 217-1
Gray 9.86 13-1 2.54 50-1 0.63 204-1
No Tip 19.63 7-1 3.16 40-1 0.67 190-1
NOTE: *Metering tip color was formerly clear All induction rates are based on a water pressure of 40 psi. Leaner dilutions can be
1 cps 75 cps 200 cps
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
achieved by ordering DE MA ultra lean tip kit 100-15KU or capil lary tip 44-61P .
D. CHEMICAL SUPPLY
Remove Blend Saf e cover. Place the chemical container inside the case. Slip a ceramic weight o ver the chemical s uppl y tubin g an d in sert
the foot valve end of the tubing into the chemical container. Run the tubing up to the top of the Blend Safe through the holes in t he back of
the Blend Safe. Install the tubing by pushing tubing over the barb located on the proportioner (Refer to Figure 1). Pe el -of f g um med l abel s
are provided for labeling chemicals.
E. DRIP TRAY
tape or velcro (not included) may be used to secure drip tray to door.
F. OUTLET TUBING: Attach one end of the 1/2 ID tubing to the proportioner outlet barb and run the other end through the ho le lo cate d a t
the bottom of the case. Attach tubing hanger to end of tubing, to hang up when not in use. Do not force outlet tubing onto the larger
barbs on the proportioner.
3. OPERATION
The Blend Safe is now ready f or use. Depressing a push button opens the valve allowing water to flow through the chemical proportioner th at
mixes a chemical water solution at the desired rate. The buttons are spring loaded to prevent accidental overflow if unattended, but may be
converted to locking buttons by cutting off the tab at the notch (See Figure 2). Pushing the button and turning it a 1/4 turn clockwise at th e e nd
of its travel allows the valve to lock on. This makes it unnecessary for the attendant to hold the button while f illing large containers. Turning
the button in a counter clockwise direction will release it, allowing the valve to shut off.
4. SERVICING
A. Proportioner fails to draw chemical:
: Attach to door of unit by inserting notches in back of drip tray through slots in door. Push tray down into place. Tw o-si de d
:
: Caution: Turn off water supply before servic ing.
:
1. Pinch outlet tube to create back pressure, which will cause unit to prime. The foot valve w ill keep the inlet tube primed thereafter.
2. Insufficient water supply pressure. 20 PSI 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. Proportioner metering tip clogged with dried chemical. Remove tip and try injecting in hot water. If there is no suction, remove
proportioner and soak in hot water to clear interior passages.
3. Inspect proportioner to ensure that there are no mineral deposit build-ups on the nozzle. If so, soak proportion er bo dy in d eli mi ng
solution. (Remove all p arts attached to p ropor tioner before s oaking in deliming solution.) Note: Use care when handling
hazardous chemicals.
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 supply vessel or hang up outlet tube after
use.
:
I-769 Pg. 2 of 5
Rev. B-36616 3/08/ 11
Page 3
DEMA BLEND SAFE
MODEL 662-GAPDB
INSTALLATION INSTRUCTION
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 ha t t he
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 or damage impeding plunger and kick-off spring
movement. Inspect the diaphragm, making sure the two small pinholes (bleed holes) in the diaphragm convolution are clea r t o a llo w t he
valve to close.
CAUTION: When servicing unit, be sure that replacement parts have been installed according to the drawing.
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 warranted again st defectiv e material and workmanship under norm al use and service for one y ear fro m th e
date of manufacture. This limited warranty does not apply to any products, which have a normal life shorter than one year or
failure and dam age 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 consid ered ex pend able an d a re n ot cov ered
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 wil l be repaired or replaced without charge, F.O.B. factory . DEMA assumes no liability f or damages. Retu rn m erc h an di se
authorization number, to return units for repair or replacement, must be granted in advance of return.
Inlet Hose
Adapter
FIGURE 1
Push Button
Proportioner
Metering Tip
Chemical Supply
Tube
Outlet Tube
Cabinet Lock
With Keys
Chemical Container
Ceramic Weight
Foot Valve
Removable
Drip Tray
Actuator
Action Gap
PRESSURE INDICATING TEE INSTALLATION
BLEND CENTER
WATER INLET HOSE
OUTLET TUBING
PRESSURE
INDICATING
TEE
WATER IN LET HOS E
CHEMICAL
INLET TUBING
PUSH BUTTON
UTILITY KNIFE
FIGURE 3
DETAIL OF PRESSURE
INDICATING TEE
FIGURE 2
I-769 Pg. 3 of 5
Rev. B-36616 3/08/ 11
Page 4
DEMA BLEND SAFE
MODEL 662-GAPDB
INSTALLATION INSTRUCTION
15
17
16
18
See page 8 for
breakdown
20
19
(1/4" ID BARB)
See page 8 for
breakdown
(6" Long Tubing)
21
(6' Long Tubing)
22
14
29
30
23
13
12
1
SPECIFY
COLOR
2
SPECIFY
COLOR
3
24
25
26
27
28
4
5
7
8
6
9
10
11
31
NO. PART NO. DESCRIPTION NO. PART NO. DESCRIPTION
1
66-139 Magnet Housing (Specify Color)
2
66-140 Push Button (Specify Color)
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 Kick-Off Spring
9
63-38 Plunger
10
41-15-10 Diaphragm
11
63-39 Valve Body
12
100-38 Strainer Washe r
13
63-32-2 Water Inlet Adapter Kit
14
150-6 Rubber Washer
15
65-10 Garden Hose Thread Coupling
16
99-7-1 Hose Fitting Stem
17
66-153 Pipe Plug & O-Ring Assy.
18
16-30 Action Gap Assembly
19
20
61-22GAP-2
61-99GAP-2
4 GPM (1/4” ID Barb) Proportioner
(Gray)
1 GPM (1/4” ID Barb) Proportioner
(Green)
21
16-3-6
22
61-21
23 63-78 O-Ring
24
63-79 Inle t Barb (1/4” ID Barb)
25
100-15K Metering Tip Kit (14 Sizes)
26 100-12-16
27 61-107-2
28* 100-16E-10
29 66-21
30 66-64 Drip Tray
NO. PART NO. DESCRIPTION
31 68-6-QD2 Pressure Indicating Tee
½” ID X 6” Lg. Vinyl Outlet Tube (1
GPM Only)
½” ID X 6’ Lg. Vinyl Outlet Tube (4
GPM Only)
1/4” ID X 28” Lg. Vinyl Supply Tubing
Ceramic Weight
Foot Valve
Cabinet Lock
ACCESSORIES
*Foot Valve also available with silic one (100-16S-) or Viton (100-16V-) rubbe r seals. Please speci fy material when ordering.
I-769 Pg. 4 of 5
Rev. B-36616 3/08/ 11
Page 5
DEMA BLEND SAFE
MODEL 662-GAPDB
INSTALLATION INSTRUCTION
5
1
1
2
3
NO. PART NO. DESCRIPTION
1 150-6 Rubber Washer
2 61-36 Flow Disk
3 16-3-6 1/2” I.D. x 6” Lg. Vinyl Outlet Tube (1 GPM Only)
4 61-21 1/2” I.D. x 6’ Lg. Vinyl Outlet Tube (4 GPM Only)
5 63-89-1 Rubber Washer (1/32” Thick)
6 16-30 Action Gap Assemb ly
4
6
I-769 Pg. 5 of 5
Rev. B-36616 3/08/ 11
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