DEMA 700 Series Manual de usuario

I-776 Page 1of 18

Rev. G29208

(Not all models are shown)

700 SERIES

DAH “Dilution at Hand” Blend Centers

Owners Manual

Basic DAH Blend Center Operation

Warning:Usecarewhenhandlinghazardouschemicalsanduseprotectiveclothing/eyewearasrecommendedbyChemicalManufacturer.

The DAH “Dilution at Hand” blend center is a chemical/water solution dispensing system engineered to dilute

concentrated chemicals utilizing versatile controls and ASSE Standard 1055 Type B approved backflow

prevention devices with 1 and/or 4 GPM flow rate proportioners. Depending on the DAH blend center

equipment, the flow of inlet water and the desired mixture of chemical can be either activated by sliding a lift

button by hand, sliding the lever with the spray bottle, or depressing the trigger on the remote fill gun. Once the

valve control mechanism is activated, the water inlet valve opens allowing water to flow through the backflow

prevention device/proportioner that mixes a chemical/water solution at the desired induction rate with the use of

metering tips.

Bottle & Hose Fill Application: A return spring is used on the sliding lift button and sliding lever to prevent an

accidental overflow of chemical/water solution if unattended (Note: Unless the sliding lift button is in the

“Lock” position). To “Lock” the sliding lift button, slide the button all the way up then push it in towards the

wall. Slowly release the button and it will stay in the “Lock” position. To “Unlock” the button, the button

and/or the lever can be pushed upward to automatically release the locking mechanism.

Remote Fill Application: A return spring is used on the remote gun trigger to prevent an accidental overflow of

chemical/water solution if unattended (Note: Unless the trigger lock is in the “Lock” position). To “Lock” the

remote gun trigger, depress the trigger and slide the lock lever to the right. Slowly release the trigger and it will

stay in the “Lock” position. To “Unlock” the trigger, depress the trigger again to automatically release the

locking mechanism. Sold by DEMA Engineering Company, St. Louis, MO 63122 U.S.A.

I-776 Page 2of 18

Rev. G29208

Getting to Know Your DAH Blend Center

(Some models may not include all items listed below)

1. Sliding Lift Button: The button controls the flow of a chemical/water solution through the outlet hose. The button can be locked

for continuous flow by lifting the button all the way up then pushing it in towards the wall. Slowly release the button and it will

stay in the “Lock” position. To “Unlock” the button, the button and/or the lever can be pushed upward to automatically release

the locking mechanism.

2. Cover: The cover is easily snapped into place for assembly and removed for serviceability. Insert the two lower tabs on the cover

into the lower base pocket features, and then rotate upper cover towards the base until it snaps into place. Push down on upper

cover snap-in lever feature and pull forward on cover for removal.

3. Bucket Fill Outlet Hose: The bucket fill outlet hose is used to fill containers away from the unit by means of the sliding lift

button. The container being filled must be positioned lower than the dispenser.

4. Bucket Fill Outlet Hose Hanger: The wire formed hanger is designed to slide on the end of the bucket fill hose and to be used as

a handgrip. The hanger has a hook feature capable of sliding into the cover pocket feature for storage (See item 8 below).

5. Base: The base is used to mount the unit to the wall and to support the valve body mechanism.

6. Water Inlet Connection: A female ¾ - 11 ½ hose swivel coupling with strainer washer is used to connect the DAH blend center

to the water supply line.

7. Selector Control Knob: Selector knob allows the operator to choose either a desired chemical or amount of chemical dilution.

8. Bucket Fill Outlet Hose Pocket Features: A pocket feature on either side of the cover is used to hang the bucket fill outlet hose

onto the dispenser. The bucket fill outlet hose must be unhooked prior to removing the cover.

9. Sliding Lever: The lever controls the flow of chemical/water solution through the outlet hose by pushing the lever up with the

bottle. If the “Sliding Lift Button” is locked for continuous flow, the lever can be pushed upward to unlock the lift button feature.

10. Bottle Fill Outlet Hose. The bottle fill hose is used to fill spray bottles with minimal foaming.

11. Lever Return Spring: The compression spring returns the lever automatically to shut off the flow of chemical/water solution

unless the lift lever is in the “Lock” position.

12. Backflow Prevention Device: The backflow prevention device prevents any chemical solution from flowing back into the water

supply. The “Action Gap” & “Air Gap” backflow prevention devices are ASSE Standard 1055 Type B approved.

13. Proportioner: The “Action Gap” is used with either a 1 or 4 GPM flow proportioner. The 1 & 4 GPM “Air Gap” backflow

prevention devices have built in proportioners. The 1 GPM proportioners are green and the 4 GPM proportioners are white.

14. *Elbow: The chemical supply tube assembly is connected to the elbow for drawing chemical out of the concentrated bottle.

15. Valve Subassembly: The valve assembly is a watertight valve utilizing high pressure “O-Rings”. The various components are

held together when the valve subassembly is slid into the retaining blades (forks) on the base itself. (Note: The complete valve

assembly must be subassembled then slid into the base or bases as “one” component.)

16. Base Keyhole Mounting Bosses: Each base has two keyhole bosses for mounting the unit to the wall.

17. *Selector Body: One or more chemical supply and foot valve assemblies are connected to the selector body for drawing

concentrated chemical out of one or more containers.

18. Chemical Supply Hose Access Features: The two bottom slot features in the base are used when the blend center is mounted to

the wall whereas the two large holes are used when the blend center is mounted to a wire rack.

19. Remote Fill Outlet Hose/Handle Assembly: The Remote Fill Outlet hose is used to fill containers away from the unit by means

of depressing the trigger. The container being filled must be positioned lower than the dispenser. The remote handle (gun) has a

hook feature capable of sliding into the cover pocket feature for storage (see item 8 above).

20. Trigger: The trigger controls the flow of chemical/water solution through the outlet hose by depressing it.

21. Trigger Lock: The trigger can be locked for continuous flow by depressing the trigger and sliding the lock lever to the right.

Slowly release the trigger and it will stay in the “Lock” position. To “Unlock” the trigger, depress the trigger to automatically

release the locking mechanism.

*The elbow and selector body hose barb features are threaded to accept various size metering tips for controlling the desired chemical

induction flow rate (See section labeled “Metering Tip(s) Selection and Installation” on page 7 for detailed information.)

10 14

I-776 Page 3of 18

Rev. G29208

Table of Contents

Basic DAH Blend Center Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Getting to Know Your DAH Blend Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Installation Must Meet Local Plumbing Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

ASSE Standard 1055 Type B Approved Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

DAH Blend Center Application Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Merchandise Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Product Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Tools Needed for Mounting DAH Blend Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Unpacking and Checking Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Installing New DAH Blend Center to the Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Installing New DAH Blend Center/Rack Assembly to the Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7

Typical DAH Blend Center “Chemical Supply & Hose” Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Metering Tips(s) Selection and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

DAH Blend Center Proportioner Induction Flow Rate Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Maintaining and Servicing DAH Blend Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-12

Disassembling & reassembling the remote fill hose assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Checking backflow prevention device/proportioner, metering tip(s), and/or foot valves . . . . . . . . . . 10

Checking water valve malfunction on bottle & hose fill applications . . . . . . . . . . . . . . . . . . . . . . . . . 10

Adding a DAH blend center to an existing DAH blend center . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-12

Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Parts List for DAH Blend Center (Bottle/Hose Fill Applications) . . . . . . . . . . . . . . . . . . . . . . . . . . . 14, 16-17

Parts List for DAH Blend Center (Remote Fill Hose Assembly Application) . . . . . . . . . . . . . . . . . . . . . 15-17

Parts List for DAH Rack Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Installation Must Meet Local Plumbing Codes

Note: All installations must conform to local plumbing codes and use approved backflow prevention devices. A pressure indicating

tee is to be installed with existing faucets according to local plumbing codes in the state of Wisconsin and any other state that requires

the use of a pressure indicting tee.

ASSE Standard 1055 Type B Approved Components

“Action Gap” & “Air Gap” backflow prevention devices are ASSE Standard 1055 Type B approved.

DAH Blend Center Application Requirement

Water supply pressure should be in the 20-125 psi range and water temperature must not exceed 150°F.

Merchandise Returns

No Merchandise will be Returned for Credit Without DEMA’S Written Permission. Returned Merchandise Authorization Number is

Required in Advance of Return. Product Warranty

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 that have a normal life shorter than one year or failure and damage

caused by chemicals, corrosion, physical abuse, or misapplication. Rubber and synthetic rubber parts such as “o”-rings, diaphragms,

PVC 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 is 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 must be granted in advance of returned units for repair or replacement (See “Merchandise Returns” above).

Tools Needed for Mounting DAH Blend Center

Hammer Drill with 1/4”, 1/8”, 9/32” and 5/32” Diameter Bits

Pliers Medium Phillips Screwdriver

Tape Measure Straight Edge/Level

I-776 Page 4of 18

Rev. G29208

14 5/8

13 3/4

18 3/8

45/8

91/8

(Note: All

dimensions

are in inches)

3/4

53/83

41/2

WATER INLET

CONNECTION

SEE STEP 2

Unpacking and Checking Contents

Table of Contents

Item Description Qty

ABlend Center or Blend Center/Rack Assembly 1

B Bag of Loose Parts (See table below) 1

C **Outlet Hose **

D Chemical Supply Tube & Foot Valve Assembly *

E DAH Owners Manual 1

F Drip Tray (Only supplied on some DAH Blend Center/Rack Models) *

Note: Save owners manual for servicing and parts information.

Parts in Item “B” (Bag of Loose Parts)

Item Description Qty

G Ceramic Weight

H Screw & Anchor Kit *

I 100-15K Metering Tip Kit *

J Chemical Label *

K Bucket Fill Outlet Hose Hanger (Only on some models) 1

L Key Set (Only supplied on Multiproduct Rack Models) 1

*Quantity varies depending on the model of the DAH blend center.

a. There should be an equal quantity of Items “D” & “G”.

b. Blend Center: 1 #10 hardware kit (Item “H”) per individual unit in blend center.

Blend Center/Rack Assembly: 1 #12 hardware kit (Item “H”).

**Outlet Hose Description for Item “C”

Backflow Prevention

Device/Proportioner Description of Outlet Hose(s) Per

Proportioner Qty

“Action Gap”/1 GPM Proportioner Short Hose 1

“Action Gap”/4 GPM Proportioner Long Hose 1

“1 GPM “Air Gap” Proportioner Short Hose 2

“4 GPM “Air Gap” Proportioner Long Hose 1

“Action Gap”/4 GPM

Proportioner/Remote Fill Gun Double Hose w/Remote Gun Assembly

(Note: Already Assembled) 1

4 GPM “Air Gap” Proportioner

Double Hose w/Gun Double Hose w/Remote Gun Assembly

(Note: Already Assembled) 1

Installing New DAH Blend Center to the Wall

1. Evaluating wall spacing for hanging

blend center on wall: Depending on

the number of individual units that are

connected together, wall space must be

closely laid out to make sure there is

adequate room. Be sure to allow a

minimum of 12 inches on both the left

and right hand sides of the blend

center. The added space will be used

for hanging the bucket fill outlet hose,

remote fill gun, and for attaching the

water supply to the blend center. This

will vary depending on the model of

the blend center. (Note: All dimensions

are shown in inches and the sketch

shows the mounting layout for a 4 unit

DAH blend center.)

I-776 Page 5of 18

Rev. G29208

2. Laying out and drilling holes in the wall for mounting the DAH Blend Center: Carefully layout the proper mounting holes on

the wall based on the information in step 1 on previous page using a tape measure and straight edge/level for hanging the blend

center on the wall. (Note: Drill two holes into the wall for each individual unit in the DAH blend center. Drill all of the holes

into the drywall using a 1/4” diameter bit for use with the included #10 x 1” long screw and anchor set. If mounting the blend

center to wood and you do not plan to use the included anchors, drill 1/8” diameter holes.)

3. Getting the water supply line and blend center ready so it can be mounted on the wall: Remove the individual unit cover(s)

by pressing down on the upper cover snap-in lever feature and pulling forward on the cover. (Note: If the blend center is equipped

with a selector valve, the phillips screw holding the selector knob will need to be removed. Save all removed components in a

safe place for re-assembly.) A water supply line must be plumbed up to the right hand side of the DAH blend center using a male

¾ - 11 ½ N.H. hose coupling fitting.

4. Mounting blend center to the wall and connecting the water supply line: Insert the anchors into drilled holes and hammer

them into the wall until they are flush with face of wall. Assemble all of the #10 x 1” long screws with a phillips screwdriver into

the anchors so the screw heads are sticking out of the wall approximately ½”. Carefully align the large section of the keyhole

slots in the blend center base(s) over the screw heads. Once positioned properly, push blend center against the wall over the

screw heads and slide it down until the keyhole slots are resting on the screws. Tighten the screws against the keyhole bosses in

each base. Connect the water supply line to the female swivel garden hose coupling on the blend center and tighten by hand.

(Note: May need to tighten hose coupling another ¼ turn with pliers but Do Not Overtighten.) Water supply pressure should be

in the 20-125 psi range and water temperature must not exceed 150

F. Slowly turn on the water supply and check for any leaks.

(Note: See section labeled “Trouble Shooting” on page 13 if any continual leaks are visible.) Mount water supply line to wall

with proper clamp(s) to avoid any damage to the blend center. (Go to step #5 on the next page)

Installing New DAH Blend Center/Rack Assembly to the Wall

1. Evaluating wall spacing for hanging blend center/rack assembly on wall: On the single product rack, allow a minimum of 12

inches on both the left and right hand sides of the rack. On the multiproduct rack, allow a minimum of 4 inches on both the left

and right hand sides of the rack. The added space will be used for attaching the water supply to the blend center. This will vary

depending on the model of the blend center. (Note: All dimensions are shown in inches and the sketch shows the mounting for a

single product and multiproduct rack assembly.)

25 3/8

MULTIPRODUCT RACK

(Note: All dimensions are in inches)

SINGLE PRODUCT RACK

19 1/4

11/16

2 7/16

5 5/8

6 1/2

1 5/8

7 3/4

(DAH Blend Center not shown)

19 9/16

4 11/16

4 15/16

10 1/8

I-776 Page 6of 18

Rev. G29208

Selector

Foot Valve

Assembly

Ceramic

Weight

Tip

Foot Valve

Assembly

Elbow

Tip

Ceramic

Weight

2. Laying out and drilling holes in the wall for mounting the DAH Blend Center/Rack Assembly: Carefully layout the proper

mounting holes on the wall based on the information in step 1 on previous page using a tape measure and straight edge/level for

hanging the rack assembly on the wall. (Note: Drill four holes into the wall for either DAH rack assembly. Drill all of the holes

into the drywall using a 9/32” diameter bit for use with the included #12 x 1” long screw and anchor set. If mounting the blend

center to wood and you do not plan to use the included anchors, drill 5/32” diameter holes.)

3. Getting the water supply line and blend center ready so it can be mounted on the wall: Remove the individual unit cover(s)

by pressing down on the upper cover snap-in lever feature and pulling forward on the cover. (Note: If the blend center is equipped

with a selector valve, the phillips screw holding the selector knob will need to be removed. Save all removed components in a

safe place for re-assembly.) A water supply line must be plumbed up to the right hand side of the DAH blend center using a male

¾ - 11 ½ N.H. hose coupling fitting.

4. Mounting blend center to the wall and connecting the water supply line: Insert the anchors into drilled holes and hammer

them into the wall until they are flush with face of wall. Carefully align and position the rack over the anchors and assemble all

of the #12 x 1” long screws with a phillips screwdriver into the anchors. Tighten the screws against the rack but DO NOT

OVERTIGHTEN. Connect the water supply line to the female swivel garden hose coupling on the blend center and tighten by

hand. (Note: May need to tighten hose coupling another ¼ turn with pliers but DO NOT OVERTIGHTEN.) Water supply

pressure should be in the 20-125 psi range and water temperature must not exceed 150

F. Slowly turn on the water supply and

check for any leaks. (Note: See section labeled “Trouble Shooting” on page 13 if any continual leaks are visible.) Mount water

supply line to wall with proper clamp(s) to avoid any damage to the blend center. Assemble drip tray (if provided) directly below

the bottle fill units by snapping the tabs over the rod (see page 18).

Typical DAH Blend Center

“Chemical Supply & Hose Installation”

5. Metering tip(s) selection and installation for

various chemical induction flow rates: The

chemical induction flow rates through the

proportioners are controlled by individual

metering tips. Select and install the proper tip(s)

depending on the proportioner in the DAH blend

center and based on the Chemical Manufacturer’s

recommendation for desired chemical flow rate or

ratio. (See steps 2 through 4 in the section

labeled “Metering Tip(s) Selection and

Installation” on page 7.)

6. Chemical supply installation and hose

connections:

Slip a ceramic weight over a chemical supply

hose and slide it against the foot valve. Install the

chemical supply tube and foot valve assembly by

sliding the open end of the tube up through the

DAH base and pushing the tube over the barb

located on the right or left side of the

proportioner. Place the concentrated chemical

container inside the rack or on a flat surface.

Slide the foot valve side of the Hose assembly

into the container. Repeat for each proportioner

barb or selector barb. (Note: If it is more

convenient, the open end of the chemical supply

tube can be inserted through the rear surface of

the base especially designed for rack mounted

DAH blend center applications.)

7. Chemical label installation: Individual chemical labels have been supplied for identifying the chemical(s) being used in the

blend center application. Attached the proper chemical label to the cover(s) depending on the blend center. (Note: On selector

applications, be sure to attach the proper chemical name in the corresponding selector positions.)

I-776 Page 7of 18

Rev. G29208

Install Small

Hose First

Then Install

Larger Hose

"Air Gap"

Bottle Fill

1 GPM

(Green)

Bucket Fill

Bottle Fill

Sketch 2

1 GPM

(Green)

Short Hose

"Action

Gap"

Sketch 1

Long

Hose

4 GPM

(White)

Sketch 3

Bucket FillBucket Fill

Closed Loop

Hook Feature

Open Loop

Long Hose

4 GPM

(White)

Open End of

Hose

Sketch 4 Sketch 5

Push hose

against hanger

Hanger

"Action Gap"

Proportioner

1 GPM (Green)

4 GPM (White)

Proportioner

"Air Gap"

8. Outlet hose installation: Select and install the outlet hose(s) according to the proper sketch(s) as follows:

Sketch

#Type of Backflow Prevention

Device/Proportioner Proportioner Flow Rate

& Color of Proportioner Qty & Type of

Outlet Hose(s)

1“Action Gap”/Proportioner 1 GPM - Green Single short hose

2“Action Gap”/Proportioner 4 GPM - White Single long hose

3“Air Gap” Proportioner 1 GPM - Green Two short hoses

4“Air Gap” Proportioner 4 GPM - White Single long hose

5Either Type 4 GPM - White Bucket fill hose hanger

Note: Remote fill hose assembly is preassembled & ready to use.

Slide closed loop end of

hanger onto open end of hose

and place in desired position,

then slip open end of hose

into open loop of hanger

9. Installing cover(s): Insert the two lower tabs on the cover into the lower base pocket features, and then rotate upper cover

towards the base until it snaps into place. (Note: If the blend center is equipped with selector valve, slide the circular hole feature

in the cover over the selector prior to inserting the two lower cover tabs into the lower base pocket features, then rotate upper

cover towards the base until it snaps into place. Slide the knob over the selector valve stem then install the screw with a phillips

screwdriver (do not overtighten). The blend center is now ready for use.

Metering Tip(s) Selection and Installation

Warning:Usecarewhenhandlinghazardouschemicalsanduseprotectiveclothing/eyewearasrecommendedbyChemicalManufacturer.

The chemical induction flow rates are controlled by individual metering tips.

1. Remove cover(s) and selector knob as necessary. Remove all necessary chemical supply tubes.

2. Select the proper chemical induction flow rate table based on the equipment being used on the DAH blend center as follows:

a. Type of Backflow Prevention Device/Proportioner: (“Action Gap” or “Air Gap”)

b. Proportioner Flow Rate: (“ 1 GPM” or “4 GPM”)

(Note: The 1 GPM proportioners are green and the 4 GPM proportioners are white.)

See Table #

On page 8 Type of Backflow Prevention

Device/Proportioner Proportioner Flow Rate

& Color of Proportioner

1 (Left Side) “Action Gap”/Proportioner 1 GPM - Green

1 (Right Side) “Action Gap”/Proportioner 4 GPM - White

2 (Left Side) “Air Gap” Proportioner 1 GPM - Green

2 (Right Side) “Air Gap” Proportioner 4 GPM - White

3. Select the proper tip(s) based on the DAH blend center proportioner and on the Chemical Manufacturer’s recommendation for

desired chemical flow rate or ratio.

Reference information: 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.

4. Install or replace the tip(s) into the proportioner elbow barb and/or selector barbs (do not overtighten).

5. Connect all chemical supply tubes. (Note: Always check and make sure the lever will slide freely and there are no tubes rubbing

the lever and resisting its movement if so equipped.)

6. Re-assembly cover(s) and selector knob with screw if so equipped (do not overtighten).

I-776 Page 8of 18

Rev. G29208

DAH Blend Center Proportioner Induction Flow Rate Charts

Table 1: “Action Gap”/Proportioner Induction Flow Rates w/Standard 1/4" Barb and Tubing

(1 GPM Flow Rate Action Gap Proportioner)

Injection Rates For Viscosities Shown (4 GPM Flow Rate Action Gap Proportioner)

Injection Rates For Viscosities Shown

1cps 75cps 200cps 1cps 75cps 200cps

Metering

Tip

Color Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio

Tan 1.03 125-1 0.76 168-1 0.38 333-1 0.33 387-1 0.26 500-1 0.12 1090-1

Orange 1.24 103-1 0.98 130-1 0.53 241-1 0.42 307-1 0.32 430-1 0.17 735-1

Turquoise 1.43 89-1 1.07 119-1 0.61 211-1 0.51 251-1 0.34 382-1 0.19 676-1

Pink 2.47 52-1 1.58 81-1 0.92 139-1 0.78 165-1 0.56 230-1 0.3 422-1

Light Blue* 3.05 42-1 2.1 61-1 1.06 121-1 0.87 147-1 0.67 192-1 0.33 391-1

Brown 3.48 37-1 2.31 55-1 1.15 111-1 0.99 129-1 0.74 174-1 0.37 345-1

Red 4.38 29-1 2.83 45-1 1.23 104-1 1.37 93-1 0.91 141-1 0.44 289-1

White 5.33 24-1 3.1 42-1 1.37 93-1 1.52 84-1 1.04 123-1 0.48 264-1

Green 6.38 20-1 3.63 35-1 1.4 91-1 1.72 74-1 1.22 105-1 0.52 244-1

Blue 6.77 19-1 3.78 34-1 1.45 88-1 2.13 60-1 1.27 101-1 0.54 239-1

Yellow 9.90 13-1 5.1 25-1 1.48 86-1 3.05 42-1 1.71 75-1 0.56 229-1

Black 15.00 9-1 6.54 20-1 1.53 84-1 4.50 28-1 1.96 65-1 0.57 224-1

Purple 24.94 5-1 7.28 18-1 1.57 82-1 7.75 17-1 2.4 53-1 0.59 217-1

Gray 35.94 4-1 8.5 15-1 1.64 78-1 9.86 13-1 2.54 50-1 0.63 204-1

NoTip 73.21 2-1 9.35 14-1 1.87 69-1 19.63 7-1 3.16 40-1 0.67 190-1

Table 2: “Air Gap” Proportioner Induction Flow Rates w/Standard 1/4" Barb and Tubing

164 BAG (1 GPM Flow Rate Air Gap Proportioner)

Injection Rates For Viscosities Shown 163 BAG (4 GPM Flow Rate Air Gap Proportioner)

Injection Rates For Viscosities Shown

1cps 75cps 200cps 1cps 75cps 200cps

Metering

Tip

Color Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio

Tan 1.25 102-1 0.90 142-1 0.60 213-1 0.30 427-1 0.20 640-1 0.15 853-1

Orange 1.70 75-1 1.20 107-1 0.80 160-1 0.40 320-1 0.30 427-1 0.25 512-1

Turquoise 2.15 60-1 1.55 83-1 1.10 116-1 0.60 213-1 0.40 320-1 0.30 427-1

Pink 3.00 43-1 2.00 64-1 1.50 85-1 0.80 160-1 0.50 256-1 0.40 320-1

Light Blue* 3.90 33-1 2.75 47-1 1.80 71-1 1.00 128-1 0.70 183-1 0.45 284-1

Brown 4.55 28-1 3.00 43-1 2.00 64-1 1.20 107-1 0.80 160-1 0.50 256-1

Red 5.80 22-1 3.60 36-1 2.30 56-1 1.50 85-1 0.90 142-1 0.60 213-1

White 7.00 18-1 4.45 29-1 2.70 47-1 1.85 69-1 1.10 116-1 0.70 183-1

Green 7.90 16-1 5.00 26-1 3.00 43-1 2.00 64-1 1.25 102-1 0.80 160-1

Blue 9.80 13-1 5.75 22-1 3.30 39-1 2.50 51-1 1.50 85-1 0.82 156-1

Yellow 14.80 9-1 7.35 17-1 3.55 36-1 4.00 32-1 1.85 69-1 0.90 142-1

Black 20.15 6-1 8.50 15-1 3.70 35-1 5.50 23-1 2.00 64-1 0.94 136-1

Purple 27.80 5-1 9.80 13-1 3.80 34-1 8.80 15-1 2.40 53-1 0.96 133-1

Gray 31.60 4-1 10.50 12-1 3.90 33-1 11.65 11-1 2.50 51-1 1.00 128-1

NoTip 35.70 3.6-1 11.80 11-1 4.50 28-1 16.20 8-1 3.00 43-1 1.20 107-1

Note: All induction flow rates are based on a water pressure of 40 psi.

Leaner dilutions can be achieved by ordering DEMA ultra lean metering tip kit 100-15KU.

*Metering tip color was formerly clear.

Service Note: Standard size ¼” hose barbs and metering tips that come with this model are used for water thin (1cps) products. Ratios as low as

parts-per-million can be achieved with the use of a capillary metering tip. More viscous products (75cps – 200cps) may require larger 3/8” hose

barbs and metering tips. If you are having difficulty achieving the ratio you require, call DEMA and ask for the technical department.

I-776 Page 9of 18

Rev. G29208

Maintaining and Servicing the DAH Blend Center

Caution: Turn off water supply before doing maintenance or servicing.

Warning: Use care when handling hazardous chemicals and use protective clothing/eyewear as recommended by Chemical

Manufacturer. This includes handling of chemical supply and outlet tubes.

Note: Water supply pressure should be in the 20-125 psi range and water temperature must not exceed 150°F.

Disassembling & reassembling the remote fill hose assembly:

1. Remove cover(s) and selector knob as necessary.

2. Removal of the double hose from the proportioner also involves the disconnection of both the clear and blue 1/8” I.D. tubes.

(Note: The 1/8” I.D. tubing is fairly stiff and the hose barbs can be damaged if not handled carefully.)

3. Slide the upper hose clamp on the blue high pressure tubing up above the hose barb. (Note: It is helpful to use a rotational motion

when sliding the hose clamp up.)

4. Unscrew the diaphragm nut in the direction shown on the sketch. (Note: The hose barb on the diaphragm nut will need to rotate

inside the 1/8” I.D. tubing to remove the nut.)

5. Disassemble the elbow from the front of the valve body using a phillips screwdriver. (Note: The elbow is sealed to the valve

body via an o-ring. Be careful not to loose the o-ring.)

6. Loosen the hose clamp holding the double hose to the proportioner. Remove the double hose off of the proportioner using a

steady pulling and rotational motion. Now you can get to the backflow prevention devise/proportioner.

7. Repeat the same steps above in reverse order to reassemble the remote fill hose assembly. Pay special attention to push the

double hose far enough on the proportioner so it lines up with the flat surface of the top hose barb. Also see Detail “A” for proper

installation of the o-ring onto the elbow before reassembling the elbow to the valve body. (Note: Check to see that the diaphragm

is properly seated then hand-tighten the diaphragm nut.)

8. Reassemble cover(s) and selector knob with screw if so equipped. (Do not overtighten.)

HIGH PRESSURE 1/8" I.D. TUBE (BLUE)

Disassemble elbow from valve

body (See Detail "A" for

re-assembling elbow)

LOW PRESSURE 1/8" I.D. TUBE (CLEAR)

Loosen hose clamp enough to slide

hose off of proportioner

REMOTE FILL HOSE ASSEMBLY

(Disassemble both of the 1/8" I.D. tubes

prior to removing double hose)

Slide hose clamp up 1/2"

minimun (Rotating clamp

while sliding it up is helpful)

Unscrew diaphragm nut

as arrow indicates

Diaphragm must be seated

properly before reinstalling

diaphragm nut

#6HI-LO SCREW

Slide clamp over barb

& tighten clamp

FULLYASSEMBLED

Hand tighten

diaphragm nut

Assemble o-ring

against shoulder prior

to installing elbow

DETAIL "A"

Do not kink tube

Slide clamp against

diaphragm nut

DIAPHRAGM NUT Shoulder

I-776 Page 10of 18

Rev. G29208

Checking backflow prevention device/proportioner, metering tip(s), and/or foot valve(s):

1. Remove cover(s) and selector knob as necessary. Remove outlet hoses and chemical supply tubes as necessary. See section

labeled “Disassembling & reassembling the remote fill hose assembly” on previous page for removing the remote fill hose

assembly.

2. Inspect metering tip(s) and foot valve(s) for build up of dried chemical. Inspect air gap proportioner for build up of hard water

mineral deposits on top nozzle or clogging of inlet screens.

3. If clogged, remove these items and soak in hot water. Hard water deposits can be removed by soaking in an off-the-shelf product

such as CLR. Clean clogged passageways with soft brush or other acceptable tools as necessary. (Note: Selector valve or elbow

needs to be disassembled from proportioner before the proportioner can be removed).

4. Replace with clean or new parts as needed.

5. Connect all outlet and chemical supply tubes. (Note: Always check and make sure the lever will slide freely and there are no

tubes rubbing the lever and resisting its movement if so equipped.)

6. Reassemble cover(s) and selector knob with screw if so equipped (do not overtighten).

Checking water valve malfunction on bottle & hose fill applications:

1. Check to see that the lever moves freely up & down. Determine which water valve is malfunctioning if equipped with more than

one valve body.

2. Follow steps 2 through 7 in the section labeled “Adding a DAH blend center to an existing DAH blend center” below for properly

removing the valve subassembly from the base(s).

3. Remove the screw and nylon washer retaining the sliding lever to the water valve body. (Note: Be careful not to let the magnet

fall out of the lever pocket and get lost as the lever is being removed from the valve body.)

4. Remove the enclosing tube nut from the valve body. (Note: Be careful when removing the nut not to lose the plunger, kickoff

spring, enclosing tube or diaphragm).

5. Check for dirt or damage impeding plunger and kickoff spring movement.

6. Inspect the diaphragm, making sure the two small pin holes (bleed holes), located in the diaphragm’s webbing membrane, are

clear to allow the valve to close. If holes are clogged, remove and soak in hot water. Carefully clean clogged passageways to

avoid any damage to the diaphragm.

7. Replace with clean or new parts as needed. Reassemble valve body subassembly per Figure 2 in the section labeled “Parts List

For DAH Blend Center” on page 14. Hand-tighten enclosing tube nut.

8. Reassemble magnet and lever to valve body with nylon washer and screw per Figure 2 in the section labeled “Parts List For DAH

Blend Center” on page 14. Do not overtighten screw.

9. Follow steps 16 through 18 in the section labeled “Adding a DAH blend center to an existing DAH blend center” on page 12 for

properly reassembling the valve subassembly to the base(s) until the blend center is completely assembled.

Adding a DAH blend center to an existing DAH blend center:

1. Evaluate wall spacing for the added DAH blend center (See step 1 in the section labeled “Installing New DAH Blend Center to

the Wall” on page 4).

2. Shut off and disconnect water supply line from blend center. If equipped with a bucket or remote fill outlet hose, carefully

remove the free end of the outlet hose hanging on the cover and set it in a safe place where it won’t get damaged.

3. Remove cover(s) and selector knob from wall mounted blend center as necessary.

4. Remove outlet and chemical supply hoses as necessary. (Note: Don’t disconnect the remote fill hose assembly.)

5. Remove lever return spring(s) located in the upper section of the individual unit(s) as shown in the upper left hand sketch in step 7

on page 11. (Note: Units with the remote fill hose/handle assembly does not have a lever or return spring.)

6. Remove the screw(s) and nylon washer(s) retaining the bottom end of the sliding lever to the base(s) as shown in the upper left

hand sketch in step 7 on page 11. You may need to remove the proportioner(s) so you can get access to the screw(s). (Note:

Selector valve or elbow needs to be disassembled from proportioner before the proportioner can be removed). (Note: Units with

the remote fill hose assembly does not utilize the lever or the screw and nylon washer.)

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