Dover Hydro AccuPro User manual

10093956
3/10
Package Should Contain:
1. Proportioner unit.
2. Supply tubing 21' total.
3. Foot valve assemblies &
weights (5).
4. Discharge tubing for
each eductor.
5. Metering tip kits.
6. Mounting anchor kit.
7. Hose hook for 3.5 GPM
eductor.
8. Instruction sheet.
Clip or
bend
these
tabs to
depress button
into locked
position.
Proportioner
Model 3976AG & 3978AG
with AirGap Eductors
Hydro Systems 3798 Round Bottom Road, Cincinnati, OH 45244 ▲ Phone: [phone] ▲Fax: [phone]
Installation and Operation:
1. Remove cabinet cover. Install the short, whitish inner discharge tube on the outlet of the eductor. It goes over the smaller
barbed part on the bottom of the eductor. This tube must be in place for the eductor to function. The inner discharge
tube for a 3.5 GPM (yellow) eductor has a yellow ooding ring inside it. The inner discharge tube for a 1.0 GPM (grey)
eductor has a grey ooding ring inside of it. Install the end of the tube nearest the ooding ring on the eductor's inner
discharge barb. To ensure the IDT is on correctly, see that the metal ring gets positioned above the small barb. (Repeat
for all eductors).
2. Find suitable place close to water source for unit. Mounting bracket should be installed approx. 5' from oor. Level bracket
& mark holes. Drill 9/32" holes & install mounting anchors and screws in bracket. Drill holes for the three wall anchors with
a 5/16" drill bit, using the cabinet back as template for proper spacing of the mounting screws. Install mounting anchors,
and then screws in top two anchors. Slide key holes in cabinet back over screw heads, tighten screws, then install bottom
screw. Do not mount more than 6 feet (1.8 meters) above the bottom of the concentrate container, nor below the highest
concentrate level (never mount your concentrate higher than the proportioner).
3. Select metering tips (up to 4) for the selector valve. (see next two sections) Push each tip rmly into a separate hose
barb extending from the selector valve. A tip with no hole (clear plastic) can be used to block any valve port being used.
(This may be used for dispensing water only). Select and install a metering tip for the single product eductor (right side)
in the same manner.
4. Cuttubingprovidedintoseparate supply tubesforeach product tobe dispensed (tubingallows7 feetoftube per product).
Supply tubes should reach from hose barbs on the selector valve body and eductor to bottom of concentrate containers.
Slide ceramic weights over one end of each tube and slide foot valves into the same ends of the tubes.
5. Slip other end of supply tube through an opening in either side of the cabinet and push over the hose barb/metering
tip on the eductor. (Repeat for all eductors.)
6. Place foot valve ends of supply tubes into concentrate containers. REMEMBER TO CHECK FOOT VALVE STRAINERS PERI-
ODICALLY FOR CLOGGING: CLEAN IF NECESSARY.
7. A short discharge tube is used with the 1GPM eductor; minimum tube length is 8 inches (20cm) for proper operation.
Longer tubes (4 feet) are used with a 3.5 GPM eductor. Do not remove the ooding rings from inside the tubes. Slide
end of tube with ooding ring over eductor discharge outlet. (Repeat for all eductors.) Hooks may be installed on longer
tubes to allow discharge tube to conveniently hang from dispenser when not in use.
8. Replace cabinet cover. Push the sides in, behind the latch holes, to snap the cover in place. The
two screws provided may be installed in the holes in the cabinet sides to prevent easy removal
of cover.
9. Connect water supply hose of at least 3/8 " ID to water inlet swivel. (Minimum 25 PSI pressure,
with water running, is required for proper operation.) Connect opposite end of hose to water
supply. Turn water supply on.
10. Push button to start ow of desired water/concentrate solution, and hold until supply tube is
primed (lled). Then push the button whenever dispensing is desired, and release button to
stop ow of solution. If you wish to be able to lock the button in the “on”position: clip or bend
the two tabs behind the lower front portion of the button (see diagram). This allows the button
to be fully depressed and allows it to latch in the “on”position. To unlock, pull the button out.
Troubleshooting Chart:
* In hard water areas, scale may form inside the discharge end of the eductor, as well as in other areas of the unit that are exposed
to water. This scale may be removed by soaking the eductor in a descaling solution (deliming solution). To remove an eductor
located in the cabinet, rmly grasp water valve and unthread eductor. Replace in same manner. Alternatively, a scaled eductor can
be cleaned (or kept from scaling) by drawing the descaling solution through the unit. Operate the unit with the suction tube in the
descaling solution. Operate the unit until solution is drawn consistently, then ush the unit by drawing clear water through it for a
minute. Replace concentrate container and put suction tube into concentrate.
1. No discharge a. No water a. Open water supply
b. Magnetic valve not functioning b. Install valve parts kit
c. Eductor clogged c. Clean* or replace
d. Clogged water inlet strainer d. Disconnect inlet water line and clean s
strainer
2. No concentrate draw a. Clogged foot valve a. Clean or replace
b. Metering tip or eductor has b. Clean (descale)* or replace
scale build-up
c. Low water pressure c. Minimum 25 PSI (with water running)
required to operate unit properly
d. Discharge tube and/or ooding d. Push tube rmly onto eductor discharge
ring not in place hose barb, or replace tube if it doesn't
have a ooding ring.
e. Concentrate container empty e. Replace with full container
f. Inlet hose barb not screwed f. Tighten, but do not overtighten
into eductor tightly
g. Clogged water inlet strainer g. Disconnect inlet water line and clean
strainer
h. Air leak in chemical pick-up tube h. Put clamp on tube or replace tube if brittle
i. Selector out of position i. Assure selector is in position desired
3. Excess concentrate draw a. Metering tip not in place a. Press correct tip rmly into barb on
eductor
b. Chemical above eductor b. Place concentrate below the eductor
4. Failure of unit to turn o a. Water valve parts dirty or a. Clean* or replace with valve parts kit
defective
b. Magnet doesn't fully return b. Make sure magnet moves freely.
c. Push button stuck c. Remove button and clean cabinet/button
to remove any dirt lodged in slide recess
5. Excess foaming in discharge a. Air leak in pick-up tube a. Put clamp on tube or replace tube if brittle
SolutionCause
Problem
protective clothing and eyewear when dispensing chemicals or other materials or when working in the vicinity of all chemicals, lling or
emptying equipment, or changing metering tips.
observe safety and handling instructions of the chemical manufacturer.
direct discharge away from you or other persons or into approved containers.
dispense cleaners and chemicals in accordance with manufacturer's instructions. Exercise CAUTION when maintaining your equipment.
reassemble equipment according to instruction procedures. Be sure all components are rmly screwed or latched into position.
only to tap water outlets (85 PSI maximum).
equipment clean to maintain proper operation.
if the unit isused to ll a sink or the discharge hose can be placed into a sink, the unit must be mounted so that the bottom of the cabinet
is above the overow rim of the sink.
THANK YOU FOR YOUR INTEREST IN OUR PRODUCTS
WEAR
ALWAYS
KEEP
Please use this equipment carefully and observe all warnings andcautions.
***************************************************NOTE ********************************************
ATTACH
NOTE

AccuPro Select Parts Diagram List:
AccuPro Select Parts Diagram:
Metering Tip Selection:
The nal concentration of the dispensed solution is re-
lated to both the size of the metering tip opening and
the viscosity of the liquid being siphoned. For water-thin
products, the chart at left can be used as a guideline. If
product is noticeably thicker than water, consult the Mea-
surement of Concentration Procedure below to achieve
your desired water-to-product ratio. Because dilution can
vary with water temperature and pressure, actual dilution
achieved can only be ascertained by using the Measure-
ment of Concentration Procedure. The clear, undrilled tip
is provided to permit drilling to size not listed should you
need a dilution ratio that falls between standard tip sizes.
NOTE: A 1 GPM eductor is grey; a 4 GPM eductor is yellow.
Refer to parts diagram if unfamiliar with names of system
components.
Measurement of Concentration:
You can determine the dispensed water-to-product
ratio for any metering tip size and product
viscosity.
All that is required is to operate the primed dispenser
for a minute or so and note two things: the amount of
dispensed solution, and the amount of concentrate used
in preparation of the solution dispensed.
Dilution Ratio (X:1) where X = Amount of Mixed Solution — Amount of Concentrate Drawn
Amount of Concentrate Drawn
Dilution Ratio, then, equals X parts water to one part concentrate (X:1). If the test does not yield the desired ratio, choose a dierent tip
and repeat the test. Alternative methods to this test are 1) pH (using litmus paper), and 2) titration. Contact your concentrate supplier
for further information on these alternative methods and the materials required to perform them.
14a 160 1 GPM eductor assembly
b 161 3.5 GPM eductor assembly
15 a 10070170 1 GPM inner discharge tube
b 10070470 3.5 GPM inner discharge tube
16 a 10064794 1 GPM outer discharge tube
b 10077310 3.5 GPM outer discharge tube
17 10080957 Selector replacement kit:
e. support clip, f. Suction stub,
g. O-ring, h. selector valve assembly
18 10080720 Hose hook, grey, for
3.5 GPM discharge tube
19 3401-R Hosebarb
20 690014 Metering tip (kit)
21 500814 Tubing, 1/4" x 14'
500821 Tubing, 1/4" x 21'
22 509900 Weight
23 10089410 Footvalve, viton (EPDM also
available order 10076302)
NOT SHOWN:
641751 Screws (cabinet sides)
Key DescriptionPart No.
1 238100 Strainer washer
2 10082830 Swivel collar (molded)
3 10082801 Swivel stem (molded)
4 10075911 Hex nipple
10075950 O-ring (two per nipple)
5 10075926 Pipe plug
6 10091035 Wall bracket
7 10093995 Cabinet
8 10020700 Selector valve grommet
10020900 Back up ring for grommet
9 10093710 Button, dark grey
10 10075980 Valve parts kit
a. diaphragm, b. armature,
c. spring, d. valve bonnet
11 10079010 Spring
12 10079000 Magnet
13 10075986 Water valve
Key DescriptionPart No.
1
9
2
3
4
5
6
78
3.5 GPM EDUCTOR (RIGHT SIDE)
10
11 12
13
14b
19
15a 19 20 21
22
16b
23
APPROXIMATE DILUTIONS
AT 40 PSI FOR WATER-THIN PRODUCTS (1.0 CP)
Tip
Color Orifice Size Std. Drill Number
Ratio (per Eductor Flow)
1 GPM 3.5 GPM
No Tip .187 (3/16) 2.6:1 4:1
Grey .128 (30) 2.6:1 4:1
Black .098 (40) 2.5:1 5:1
Beige .070 (50) 3:1 8:1
Red .052 (55) 5:1 13:1
White .043 (57) 7:1 22:1
Blue .040 (60) 9:1 26:1
Tan .035 (65) 11:1 34:1
Green .028 (70) 17:1 52:1
Orange .025 (72) 19:1 64:1
Brown .023 (74) 22:1 71:1
Yellow .020 (76) 32:1 102:1
Aqua .018 (77) 39:1 128:1
Purple .014 (79) 64:1 213:1
Pink .010 (87) 128:1 447:1
17
14a
ef g
15b
abc d
16a
18